Release Notes

Apache Airflow Releases

Airflow 2.9.3 (2024-07-15)

Significant Changes

Time unit for scheduled_duration and queued_duration changed (#37936)

scheduled_duration and queued_duration metrics are now emitted in milliseconds instead of seconds.

By convention all statsd metrics should be emitted in milliseconds, this is later expected in e.g. prometheus statsd-exporter.

Support for OpenTelemetry Metrics is no longer “Experimental” (#40286)

Experimental support for OpenTelemetry was added in 2.7.0 since then fixes and improvements were added and now we announce the feature as stable.

Bug Fixes

  • Fix calendar view scroll (#40458)

  • Validating provider description for urls in provider list view (#40475)

  • Fix compatibility with old MySQL 8.0 (#40314)

  • Fix dag (un)pausing won’t work on environment where dag files are missing (#40345)

  • Extra being passed to SQLalchemy (#40391)

  • Handle unsupported operand int + str when value of tag is int (job_id) (#40407)

  • Fix TriggeredDagRunOperator triggered link (#40336)

  • Add [webserver]update_fab_perms to deprecated configs (#40317)

  • Swap dag run link from legacy graph to grid with graph tab (#40241)

  • Change httpx to requests in file_task_handler (#39799)

  • Fix import future annotations in venv jinja template (#40208)

  • Ensures DAG params order regardless of backend (#40156)

  • Use a join for TI notes in TI batch API endpoint (#40028)

  • Improve trigger UI for string array format validation (#39993)

  • Disable jinja2 rendering for doc_md (#40522)

  • Skip checking sub dags list if taskinstance state is skipped (#40578)

  • Recognize quotes when parsing urls in logs (#40508)

Doc Only Changes

  • Add notes about passing secrets via environment variables (#40519)

  • Revamp some confusing log messages (#40334)

  • Add more precise description of masking sensitive field names (#40512)

  • Add slightly more detailed guidance about upgrading to the docs (#40227)

  • Metrics allow_list complete example (#40120)

  • Add warning to deprecated api docs that access control isn’t applied (#40129)

  • Simpler command to check local scheduler is alive (#40074)

  • Add a note and an example clarifying the usage of DAG-level params (#40541)

  • Fix highlight of example code in dags.rst (#40114)

  • Add warning about the PostgresOperator being deprecated (#40662)

  • Updating airflow download links to CDN based links (#40618)

  • Fix import statement for DatasetOrTimetable example (#40601)

  • Further clarify triage process (#40536)

  • Fix param order in PythonOperator docstring (#40122)

  • Update serializers.rst to mention that bytes are not supported (#40597)


  • Upgrade build installers and dependencies (#40177)

  • Bump braces from 3.0.2 to 3.0.3 in /airflow/www (#40180)

  • Upgrade to another version of trove-classifier (new CUDA classifiers) (#40564)

  • Rename “try_number” increments that are unrelated to the airflow concept (#39317)

  • Update trove classifiers to the latest version as build dependency (#40542)

  • Upgrade to latest version of hatchling as build dependency (#40387)

  • Fix bug in SchedulerJobRunner._process_executor_events (#40563)

  • Remove logging for “blocked” events (#40446)

Airflow 2.9.2 (2024-06-10)

Significant Changes

No significant changes.

Bug Fixes

  • Fix bug that makes AirflowSecurityManagerV2 leave transactions in the idle in transaction state (#39935)

  • Fix alembic auto-generation and rename mismatching constraints (#39032)

  • Add the existing_nullable to the downgrade side of the migration (#39374)

  • Fix Mark Instance state buttons stay disabled if user lacks permission (#37451). (#38732)

  • Use SKIP LOCKED instead of NOWAIT in mini scheduler (#39745)

  • Remove DAG Run Add option from FAB view (#39881)

  • Add max_consecutive_failed_dag_runs in API spec (#39830)

  • Fix example_branch_operator failing in python 3.12 (#39783)

  • Fetch served logs also when task attempt is up for retry and no remote logs available (#39496)

  • Change dataset URI validation to raise warning instead of error in Airflow 2.9 (#39670)

  • Visible DAG RUN doesn’t point to the same dag run id (#38365)

  • Refactor SafeDogStatsdLogger to use get_validator to enable pattern matching (#39370)

  • Fix custom actions in security manager has_access (#39421)

  • Fix HTTP 500 Internal Server Error if DAG is triggered with bad params (#39409)

  • Fix static file caching is disabled in Airflow Webserver. (#39345)

  • Fix TaskHandlerWithCustomFormatter now adds prefix only once (#38502)

  • Do not provide deprecated execution_date in @apply_lineage (#39327)

  • Add missing conn_id to string representation of ObjectStoragePath (#39313)

  • Fix sql_alchemy_engine_args config example (#38971)

  • Add Cache-Control “no-store” to all dynamically generated content (#39550)


  • Limit yandex provider to avoid mypy errors (#39990)

  • Warn on mini scheduler failures instead of debug (#39760)

  • Change type definition for provider_info_cache decorator (#39750)

  • Better typing for BaseOperator defer (#39742)

  • More typing in TimeSensor and TimeSensorAsync (#39696)

  • Re-raise exception from strict dataset URI checks (#39719)

  • Fix stacklevel for _log_state helper (#39596)

  • Resolve SA warnings in migrations scripts (#39418)

  • Remove unused index idx_last_scheduling_decision on dag_run table (#39275)

Doc Only Changes

  • Provide extra tip on labeling DynamicTaskMapping (#39977)

  • Improve visibility of links / variables / other configs in Configuration Reference (#39916)

  • Remove ‘legacy’ definition for CronDataIntervalTimetable (#39780)

  • Update plugins.rst examples to use pyproject.toml over (#39665)

  • Fix nit in pg set-up doc (#39628)

  • Add Matomo to Tracking User Activity docs (#39611)

  • Fix Connection.get -> Connection. get_connection_from_secrets (#39560)

  • Adding note for provider dependencies (#39512)

  • Update docker-compose command (#39504)

  • Update note about restarting triggerer process (#39436)

  • Updating S3LogLink with an invalid bucket link (#39424)

  • Update testing_packages.rst (#38996)

  • Add multi-team diagrams (#38861)

Airflow 2.9.1 (2024-05-03)

Significant Changes

Stackdriver logging bugfix requires Google provider 10.17.0 or later (#38071)

If you use Stackdriver logging, you must use Google provider version 10.17.0 or later. Airflow 2.9.1 now passes gcp_log_name to the StackdriverTaskHandler instead of name, and this will fail on earlier provider versions.

This fixes a bug where the log name configured in [logging] remove_base_log_folder was overridden when Airflow configured logging, resulting in task logs going to the wrong destination.

Bug Fixes

  • Make task log messages include run_id (#39280)

  • Copy menu_item href for nav bar (#39282)

  • Fix trigger kwarg encryption migration (#39246, #39361, #39374)

  • Add workaround for datetime-local input in firefox (#39261)

  • Add Grid button to Task Instance view (#39223)

  • Get served logs when remote or executor logs not available for non-running task try (#39177)

  • Fixed side effect of menu filtering causing disappearing menus (#39229)

  • Use grid view for Task Instance’s log_url (#39183)

  • Improve task filtering UX (#39119)

  • Improve rendered_template ux in react dag page (#39122)

  • Graph view improvements (#38940)

  • Check that the dataset<>task exists before trying to render graph (#39069)

  • Hostname was “redacted”, not “redact”; remove it when there is no context (#39037)

  • Check whether AUTH_ROLE_PUBLIC is set in check_authentication (#39012)

  • Move rendering of map_index_template so it renders for failed tasks as long as it was defined before the point of failure (#38902)

  • Undeprecate BaseXCom.get_one method for now (#38991)

  • Add inherit_cache attribute for CreateTableAs custom SA Clause (#38985)

  • Don’t wait for DagRun lock in mini scheduler (#38914)

  • Fix calendar view with no DAG Run (#38964)

  • Changed the background color of external task in graph (#38969)

  • Fix dag run selection (#38941)

  • Fix SAWarning ‘Coercing Subquery object into a select() for use in IN()’ (#38926)

  • Fix implicit cartesian product in AirflowSecurityManagerV2 (#38913)

  • Fix problem that links in legacy log view can not be clicked (#38882)

  • Fix dag run link params (#38873)

  • Use async db calls in WorkflowTrigger (#38689)

  • Fix audit log events filter (#38719)

  • Use methodtools.lru_cache instead of functools.lru_cache in class methods (#37757)

  • Raise deprecated warning in airflow dags backfill only if -I / --ignore-first-depends-on-past provided (#38676)


  • TriggerDagRunOperator deprecate execution_date in favor of logical_date (#39285)

  • Force to use Airflow Deprecation warnings categories on @deprecated decorator (#39205)

  • Add warning about run/import Airflow under the Windows (#39196)

  • Update is_authorized_custom_view from auth manager to handle custom actions (#39167)

  • Add in Trove classifiers Python 3.12 support (#39004)

  • Use debug level for minischeduler skip (#38976)

  • Bump undici from 5.28.3 to 5.28.4 in /airflow/www (#38751)

Doc Only Changes

  • Fix supported k8s version in docs (#39172)

  • Dynamic task mapping PythonOperator op_kwargs (#39242)

  • Add link to user and role commands (#39224)

  • Add k8s 1.29 to supported version in docs (#39168)

  • Data aware scheduling docs edits (#38687)

  • Update DagBag class docstring to include all params (#38814)

  • Correcting an example taskflow example (#39015)

  • Remove decorator from rendering fields example (#38827)

Airflow 2.9.0 (2024-04-08)

Significant Changes

Following Listener API methods are considered stable and can be used for production system (were experimental feature in older Airflow versions) (#36376):

Lifecycle events:

  • on_starting

  • before_stopping

DagRun State Change Events:

  • on_dag_run_running

  • on_dag_run_success

  • on_dag_run_failed

TaskInstance State Change Events:

  • on_task_instance_running

  • on_task_instance_success

  • on_task_instance_failed

Support for Microsoft SQL-Server for Airflow Meta Database has been removed (#36514)

After discussion and a voting process, the Airflow’s PMC and Committers have reached a resolution to no longer maintain MsSQL as a supported Database Backend.

As of Airflow 2.9.0 support of MsSQL has been removed for Airflow Database Backend.

A migration script which can help migrating the database before upgrading to Airflow 2.9.0 is available in airflow-mssql-migration repo on Github. Note that the migration script is provided without support and warranty.

This does not affect the existing provider packages (operators and hooks), DAGs can still access and process data from MsSQL.

Dataset URIs are now validated on input (#37005)

Datasets must use a URI that conform to rules laid down in AIP-60, and the value will be automatically normalized when the DAG file is parsed. See documentation on Datasets for a more detailed description on the rules.

You may need to change your Dataset identifiers if they look like a URI, but are used in a less mainstream way, such as relying on the URI’s auth section, or have a case-sensitive protocol name.

The method get_permitted_menu_items in BaseAuthManager has been renamed filter_permitted_menu_items (#37627)

Add REST API actions to Audit Log events (#37734)

The Audit Log event name for REST API events will be prepended with api. or ui., depending on if it came from the Airflow UI or externally.

Official support for Python 3.12 (#38025)

There are a few caveats though:

  • Pendulum2 does not support Python 3.12. For Python 3.12 you need to use Pendulum 3

  • Minimum SQLAlchemy version supported when Pandas is installed for Python 3.12 is 1.4.36 released in April 2022. Airflow 2.9.0 increases the minimum supported version of SQLAlchemy to 1.4.36 for all Python versions.

Not all Providers support Python 3.12. At the initial release of Airflow 2.9.0 the following providers are released without support for Python 3.12:

Prevent large string objects from being stored in the Rendered Template Fields (#38094)

There’s now a limit to the length of data that can be stored in the Rendered Template Fields. The limit is set to 4096 characters. If the data exceeds this limit, it will be truncated. You can change this limit by setting the [core]max_template_field_length configuration option in your airflow config.

Change xcom table column value type to longblob for MySQL backend (#38401)

Xcom table column value type has changed from blob to longblob. This will allow you to store relatively big data in Xcom but process can take a significant amount of time if you have a lot of large data stored in Xcom.

To downgrade from revision: b4078ac230a1, ensure that you don’t have Xcom values larger than 65,535 bytes. Otherwise, you’ll need to clean those rows or run airflow db clean xcom to clean the Xcom table.

Stronger validation for key parameter defaults in taskflow context variables (#38015)

As for the taskflow implementation in conjunction with context variable defaults invalid parameter orders can be generated, it is now not accepted anymore (and validated) that taskflow functions are defined with defaults other than None. If you have done this before you most likely will see a broken DAG and a error message like Error message: Context key parameter my_param can't have a default other than None.

New Features

  • Allow users to write dag_id and task_id in their national characters, added display name for dag / task (v2) (#38446)

  • Prevent large objects from being stored in the RTIF (#38094)

  • Use current time to calculate duration when end date is not present. (#38375)

  • Add average duration mark line in task and dagrun duration charts. (#38214, #38434)

  • Add button to manually create dataset events (#38305)

  • Add Matomo as an option for analytics_tool. (#38221)

  • Experimental: Support custom weight_rule implementation to calculate the TI priority_weight (#38222)

  • Adding ability to automatically set DAG to off after X times it failed sequentially (#36935)

  • Add dataset conditions to next run datasets modal (#38123)

  • Add task log grouping to UI (#38021)

  • Add dataset_expression to grid dag details (#38121)

  • Introduce mechanism to support multiple executor configuration (#37635)

  • Add color formatting for ANSI chars in logs from task executions (#37985)

  • Add the dataset_expression as part of DagModel and DAGDetailSchema (#37826)

  • Allow longer rendered_map_index (#37798)

  • Inherit the run_ordering from DatasetTriggeredTimetable for DatasetOrTimeSchedule (#37775)

  • Implement AIP-60 Dataset URI formats (#37005)

  • Introducing Logical Operators for dataset conditional logic (#37101)

  • Add post endpoint for dataset events (#37570)

  • Show custom instance names for a mapped task in UI (#36797)

  • Add excluded/included events to get_event_logs api (#37641)

  • Add datasets to dag graph (#37604)

  • Show dataset events above task/run details in grid view (#37603)

  • Introduce new config variable to control whether DAG processor outputs to stdout (#37439)

  • Make Datasets hashable (#37465)

  • Add conditional logic for dataset triggering (#37016)

  • Implement task duration page in react. (#35863)

  • Add queuedEvent endpoint to get/delete DatasetDagRunQueue (#37176)

  • Support multiple XCom output in the BaseOperator (#37297)

  • AIP-58: Add object storage backend for xcom (#37058)

  • Introduce DatasetOrTimeSchedule (#36710)

  • Add on_skipped_callback to BaseOperator (#36374)

  • Allow override of hovered navbar colors (#36631)

  • Create new Metrics with Tagging (#36528)

  • Add support for openlineage to AFS and (#36410)

  • Introduce @task.bash TaskFlow decorator (#30176, #37875)


  • More human friendly “show tables” output for db cleanup (#38654)

  • Improve trigger assign_unassigned by merging alive_triggerer_ids and get_sorted_triggers queries (#38664)

  • Add exclude/include events filters to audit log (#38506)

  • Clean up unused triggers in a single query for all dialects except MySQL (#38663)

  • Update Confirmation Logic for Config Changes on Sensitive Environments Like Production (#38299)

  • Improve datasets graph UX (#38476)

  • Only show latest dataset event timestamp after last run (#38340)

  • Add button to clear only failed tasks in a dagrun. (#38217)

  • Delete all old dag pages and redirect to grid view (#37988)

  • Check task attribute before use in sentry.add_tagging() (#37143)

  • Mysql change xcom value col type for MySQL backend (#38401)

  • ExternalPythonOperator use version from sys.version_info (#38377)

  • Replace too broad exceptions into the Core (#38344)

  • Add CLI support for bulk pause and resume of DAGs (#38265)

  • Implement methods on TaskInstancePydantic and DagRunPydantic (#38295, #38302, #38303, #38297)

  • Made filters bar collapsible and add a full screen toggle (#38296)

  • Encrypt all trigger attributes (#38233, #38358, #38743)

  • Upgrade react-table package. Use with Audit Log table (#38092)

  • Show if dag page filters are active (#38080)

  • Add try number to mapped instance (#38097)

  • Add retries to job heartbeat (#37541)

  • Add REST API events to Audit Log (#37734)

  • Make current working directory as templated field in BashOperator (#37968)

  • Add calendar view to react (#37909)

  • Add run_id column to log table (#37731)

  • Add tryNumber to grid task instance tooltip (#37911)

  • Session is not used in _do_render_template_fields (#37856)

  • Improve MappedOperator property types (#37870)

  • Remove provide_session decorator from TaskInstancePydantic methods (#37853)

  • Ensure the “airflow.task” logger used for TaskInstancePydantic and TaskInstance (#37857)

  • Better error message for internal api call error (#37852)

  • Increase tooltip size of dag grid view (#37782) (#37805)

  • Use named loggers instead of root logger (#37801)

  • Add Run Duration in React (#37735)

  • Avoid non-recommended usage of logging (#37792)

  • Improve DateTimeTrigger typing (#37694)

  • Make sure all unique run_ids render a task duration bar (#37717)

  • Add Dag Audit Log to React (#37682)

  • Add log event for auto pause (#38243)

  • Better message for exception for templated base operator fields (#37668)

  • Clean up webserver endpoints adding to audit log (#37580)

  • Filter datasets graph by dag_id (#37464)

  • Use new exception type inheriting BaseException for SIGTERMs (#37613)

  • Refactor dataset class inheritance (#37590)

  • Simplify checks for package versions (#37585)

  • Filter Datasets by associated dag_ids (GET /datasets) (#37512)

  • Enable “airflow tasks test” to run deferrable operator (#37542)

  • Make datasets list/graph width adjustable (#37425)

  • Speedup determine installed airflow version in ExternalPythonOperator (#37409)

  • Add more task details from rest api (#37394)

  • Add confirmation dialog box for DAG run actions (#35393)

  • Added shutdown color to the STATE_COLORS (#37295)

  • Remove legacy dag details page and redirect to grid (#37232)

  • Order XCom entries by map index in API (#37086)

  • Add data_interval_start and data_interval_end in dagrun create API endpoint (#36630)

  • Making links in task logs as hyperlinks by preventing HTML injection (#36829)

  • Improve ExternalTaskSensor Async Implementation (#36916)

  • Make Datasets Pathlike (#36947)

  • Simplify query for orphaned tasks (#36566)

  • Add deferrable param in FileSensor (#36840)

  • Run Trigger Page: Configurable number of recent configs (#36878)

  • Merge nowait and skip_locked into with_row_locks (#36889)

  • Return the specified field when get dag/dagRun in the REST API (#36641)

  • Only iterate over the items if debug is enabled for DagFileProcessorManager (#36761)

  • Add a fuzzy/regex pattern-matching for metric allow and block list (#36250)

  • Allow custom columns in cli dags list (#35250)

  • Make it possible to change the default cron timetable (#34851)

  • Some improvements to Airflow IO code (#36259)

  • Improve TaskInstance typing hints (#36487)

  • Remove dependency of Connexion from auth manager interface (#36209)

  • Refactor ExternalDagLink to not create ad hoc TaskInstances (#36135)

Bug Fixes

  • Load providers configuration when gunicorn workers start (#38795)

  • Fix grid header rendering (#38720)

  • Add a task instance dependency for mapped dependencies (#37498)

  • Improve stability of remove_task_decorator function (#38649)

  • Mark more fields on API as dump-only (#38616)

  • Fix total_entries count on the event logs endpoint (#38625)

  • Add padding to bottom of log block. (#38610)

  • Properly serialize nested attrs classes (#38591)

  • Fixing the tz in next run ID info (#38482)

  • Show abandoned tasks in Grid View (#38511)

  • Apply task instance mutation hook consistently (#38440)

  • Override chakra styles to keep dropdowns in filter bar (#38456)

  • Store duration in seconds and scale to handle case when a value in the series has a larger unit than the preceding durations. (#38374)

  • Don’t allow defaults other than None in context parameters, and improve error message (#38015)

  • Make postgresql default engine args comply with SA 2.0 (#38362)

  • Add return statement to yield within a while loop in triggers (#38389)

  • Ensure __exit__ is called in decorator context managers (#38383)

  • Make the method BaseAuthManager.is_authorized_custom_view abstract (#37915)

  • Add upper limit to planned calendar events calculation (#38310)

  • Fix Scheduler in daemon mode doesn’t create PID at the specified location (#38117)

  • Properly serialize TaskInstancePydantic and DagRunPydantic (#37855)

  • Fix graph task state border color (#38084)

  • Add back methods removed in security manager (#37997)

  • Don’t log “403” from worker serve-logs as “Unknown error”. (#37933)

  • Fix execution data validation error in /get_logs_with_metadata endpoint (#37756)

  • Fix task duration selection (#37630)

  • Refrain from passing encoding to the SQL engine in SQLAlchemy v2 (#37545)

  • Fix ‘implicitly coercing SELECT object to scalar subquery’ in latest dag run statement (#37505)

  • Clean up typing with max_execution_date query builder (#36958)

  • Optimize max_execution_date query in single dag case (#33242)

  • Fix list dags command for get_dagmodel is None (#36739)

  • Load consuming_dags attr eagerly before dataset listener (#36247)


  • Remove display of param from the UI (#38660)

  • Update log level to debug from warning about scheduled_duration metric (#38180)

  • Use importlib_metadata with compat to Python 3.10/3.12 stdlib (#38366)

  • Refactored __new__ magic method of BaseOperatorMeta to avoid bad mixing classic and decorated operators (#37937)

  • Use sys.version_info for determine Python Major.Minor (#38372)

  • Add missing deprecated Fab auth manager (#38376)

  • Remove unused loop variable from airflow package (#38308)

  • Adding max consecutive failed dag runs info in UI (#38229)

  • Bump minimum version of blinker add where it requires (#38140)

  • Bump follow-redirects from 1.15.4 to 1.15.6 in /airflow/www (#38156)

  • Bump Cryptography to > 39.0.0 (#38112)

  • Add Python 3.12 support (#36755, #38025, #36595)

  • Avoid use of assert outside of the tests (#37718)

  • Update ObjectStoragePath for universal_pathlib>=v0.2.2 (#37930)

  • Resolve G004: Logging statement uses f-string (#37873)

  • Update build and install dependencies. (#37910)

  • Bump sanitize-html from 2.11.0 to 2.12.1 in /airflow/www (#37833)

  • Update to latest installer versions. (#37754)

  • Deprecate smtp configs in airflow settings / local_settings (#37711)

  • Deprecate PY* constants into the airflow module (#37575)

  • Remove usage of deprecated flask._request_ctx_stack (#37522)

  • Remove redundant login attribute in (#37565)

  • Upgrade to FAB 4.3.11 (#37233)

  • Remove SCHEDULED_DEPS which is no longer used anywhere since 2.0.0 (#37140)

  • Replace datetime.datetime.utcnow by airflow.utils.timezone.utcnow in core (#35448)

  • Bump aiohttp min version to avoid CVE-2024-23829 and CVE-2024-23334 (#37110)

  • Move config related to FAB auth manager to FAB provider (#36232)

  • Remove MSSQL support form Airflow core (#36514)

  • Remove is_authorized_cluster_activity from auth manager (#36175)

  • Create FAB provider and move FAB auth manager in it (#35926)

Doc Only Changes

  • Improve timetable documentation (#38505)

  • Reorder OpenAPI Spec tags alphabetically (#38717)

  • Update UI screenshots in the documentation (#38680, #38403, #38438, #38435)

  • Remove section as it’s no longer true with dataset expressions PR (#38370)

  • Refactor DatasetOrTimeSchedule timetable docs (#37771)

  • Migrate executor docs to respective providers (#37728)

  • Add directive to render a list of URI schemes (#37700)

  • Add doc page with providers deprecations (#37075)

  • Add a cross reference to security policy (#37004)

  • Improve AIRFLOW__WEBSERVER__BASE_URL docs (#37003)

  • Update faq.rst with (hopefully) clearer description of start_date (#36846)

  • Update public interface doc re operators (#36767)

  • Add exception to templates ref list (#36656)

  • Add auth manager interface as public interface (#36312)

  • Reference fab provider documentation in Airflow documentation (#36310)

  • Create auth manager documentation (#36211)

  • Update permission docs (#36120)

  • Docstring improvement to _covers_every_hour (#36081)

  • Add note that task instance, dag and lifecycle listeners are non-experimental (#36376)

Airflow 2.8.4 (2024-03-25)

Significant Changes

No significant changes.

Bug Fixes

  • Fix incorrect serialization of FixedTimezone (#38139)

  • Fix excessive permission changing for log task handler (#38164)

  • Fix task instances list link (#38096)

  • Fix a bug where scheduler heartrate parameter was not used (#37992)

  • Add padding to prevent grid horizontal scroll overlapping tasks (#37942)

  • Fix hash caching in ObjectStoragePath (#37769)


  • Limit importlib_resources as it breaks pytest_rewrites (#38095, #38139)

  • Limit pandas to <2.2 (#37748)

  • Bump croniter to fix an issue with 29 Feb cron expressions (#38198)

Doc Only Changes

  • Tell users what to do if their scanners find issues in the image (#37652)

  • Add a section about debugging in Docker Compose with PyCharm (#37940)

  • Update deferrable docs to clarify kwargs when trigger resumes operator (#38122)

Airflow 2.8.3 (2024-03-11)

Significant Changes

The smtp provider is now pre-installed when you install Airflow. (#37713)

Bug Fixes

  • Add “MENU” permission in auth manager (#37881)

  • Fix external_executor_id being overwritten (#37784)

  • Make more MappedOperator members modifiable (#37828)

  • Set parsing context dag_id in dag test command (#37606)


  • Remove useless methods from security manager (#37889)

  • Improve code coverage for TriggerRuleDep (#37680)

  • The SMTP provider is now preinstalled when installing Airflow (#37713)

  • Bump min versions of openapi validators (#37691)

  • Properly include airflow_pre_installed_providers.txt artifact (#37679)

Doc Only Changes

  • Clarify lack of sync between workers and scheduler (#37913)

  • Simplify some docs around airflow_local_settings (#37835)

  • Add section about local settings configuration (#37829)

  • Fix docs of BranchDayOfWeekOperator (#37813)

  • Write to secrets store is not supported by design (#37814)

  • ERD generating doc improvement (#37808)

  • Update incorrect config value (#37706)

  • Update security model to clarify Connection Editing user’s capabilities (#37688)

  • Fix ImportError on examples dags (#37571)

Airflow 2.8.2 (2024-02-26)

Significant Changes

The allowed_deserialization_classes flag now follows a glob pattern (#36147).

For example if one wants to add the class airflow.tests.custom_class to the allowed_deserialization_classes list, it can be done by writing the full class name (airflow.tests.custom_class) or a pattern such as the ones used in glob search (e.g., airflow.*, airflow.tests.*).

If you currently use a custom regexp path make sure to rewrite it as a glob pattern.

Alternatively, if you still wish to match it as a regexp pattern, add it under the new list allowed_deserialization_classes_regexp instead.

The audit_logs permissions have been updated for heightened security (#37501).

This was done under the policy that we do not want users like Viewer, Ops, and other users apart from Admin to have access to audit_logs. The intention behind this change is to restrict users with less permissions from viewing user details like First Name, Email etc. from the audit_logs when they are not permitted to.

The impact of this change is that the existing users with non admin rights won’t be able to view or access the audit_logs, both from the Browse tab or from the DAG run.

AirflowTimeoutError is no longer except by default through Exception (#35653).

The AirflowTimeoutError is now inheriting BaseException instead of AirflowException->``Exception``. See

This prevents code catching Exception from accidentally catching AirflowTimeoutError and continuing to run. AirflowTimeoutError is an explicit intent to cancel the task, and should not be caught in attempts to handle the error and return some default value.

Catching AirflowTimeoutError is still possible by explicitly except``ing ``AirflowTimeoutError or BaseException. This is discouraged, as it may allow the code to continue running even after such cancellation requests. Code that previously depended on performing strict cleanup in every situation after catching Exception is advised to use finally blocks or context managers. To perform only the cleanup and then automatically re-raise the exception. See similar considerations about catching KeyboardInterrupt in

Bug Fixes

  • Sort dag processing stats by last_runtime (#37302)

  • Allow pre-population of trigger form values via URL parameters (#37497)

  • Base date for fetching dag grid view must include selected run_id (#34887)

  • Check permissions for ImportError (#37468)

  • Move IMPORT_ERROR from DAG related permissions to view related permissions (#37292)

  • Change AirflowTaskTimeout to inherit BaseException (#35653)

  • Revert “Fix future DagRun rarely triggered by race conditions when max_active_runs reached its upper limit. (#31414)” (#37596)

  • Change margin to padding so first task can be selected (#37527)

  • Fix Airflow serialization for namedtuple (#37168)

  • Fix bug with clicking url-unsafe tags (#37395)

  • Set deterministic and new getter for Treeview function (#37162)

  • Fix permissions of parent folders for log file handler (#37310)

  • Fix permission check on DAGs when access_entity is specified (#37290)

  • Fix the value of dateTimeAttrFormat constant (#37285)

  • Resolve handler close race condition at triggerer shutdown (#37206)

  • Fixing status icon alignment for various views (#36804)

  • Remove superfluous @Sentry.enrich_errors (#37002)

  • Use execution_date= param as a backup to base date for grid view (#37018)

  • Handle SystemExit raised in the task. (#36986)

  • Revoking audit_log permission from all users except admin (#37501)

  • Fix broken regex for allowed_deserialization_classes (#36147)

  • Fix the bug that affected the DAG end date. (#36144)

  • Adjust node width based on task name length (#37254)

  • fix: PythonVirtualenvOperator crashes if any python_callable function is defined in the same source as DAG (#37165)

  • Fix collapsed grid width, line up selected bar with gantt (#37205)

  • Adjust graph node layout (#37207)

  • Revert the sequence of initializing configuration defaults (#37155)

  • Displaying “actual” try number in TaskInstance view (#34635)

  • Bugfix Triggering DAG with parameters is mandatory when show_trigger_form_if_no_params is enabled (#37063)

  • Secret masker ignores passwords with special chars (#36692)

  • Fix DagRuns with UPSTREAM_FAILED tasks get stuck in the backfill. (#36954)

  • Disable dryrun auto-fetch (#36941)

  • Fix copy button on a DAG run’s config (#36855)

  • Fix bug introduced by replacing spaces by + in run_id (#36877)

  • Fix webserver always redirecting to home page if user was not logged in (#36833)

  • REST API set description on POST to /variables endpoint (#36820)

  • Sanitize the conn_id to disallow potential script execution (#32867)

  • Fix task id copy button copying wrong id (#34904)

  • Fix security manager inheritance in fab provider (#36538)

  • Avoid pendulum.from_timestamp usage (#37160)


  • Install latest docker CLI instead of specific one (#37651)

  • Bump undici from 5.26.3 to 5.28.3 in /airflow/www (#37493)

  • Add Python 3.12 exclusions in providers/pyproject.toml (#37404)

  • Remove markdown from core dependencies (#37396)

  • Remove unused pageSize method. (#37319)

  • Add more-itertools as dependency of common-sql (#37359)

  • Replace other Python 3.11 and 3.12 deprecations (#37478)

  • Include airflow_pre_installed_providers.txt into sdist distribution (#37388)

  • Turn Pydantic into an optional dependency (#37320)

  • Limit universal-pathlib to < 0.2.0 (#37311)

  • Allow running airflow against sqlite in-memory DB for tests (#37144)

  • Add description to queue_when (#36997)

  • Updated config.yml for environment variable sql_alchemy_connect_args (#36526)

  • Bump min version of Alembic to 1.13.1 (#36928)

  • Limit flask-session to <0.6 (#36895)

Doc Only Changes

  • Fix upgrade docs to reflect true CLI flags available (#37231)

  • Fix a bug in fundamentals doc (#37440)

  • Add redirect for deprecated page (#37384)

  • Fix the otel config descriptions (#37229)

  • Update Objectstore tutorial with prereqs section (#36983)

  • Add more precise description on avoiding generic package/module names (#36927)

  • Add airflow version substitution into Docker Compose Howto (#37177)

  • Add clarification about DAG author capabilities to security model (#37141)

  • Move docs for cron basics to Authoring and Scheduling section (#37049)

  • Link to release notes in the upgrade docs (#36923)

  • Prevent templated field logic checks in __init__ of operators automatically (#33786)

Airflow 2.8.1 (2024-01-19)

Significant Changes

Target version for core dependency pendulum package set to 3 (#36281).

Support for pendulum 2.1.2 will be saved for a while, presumably until the next feature version of Airflow. It is advised to upgrade user code to use pendulum 3 as soon as possible.

Pendulum 3 introduced some subtle incompatibilities that you might rely on in your code - for example default rendering of dates is missing T in the rendered date representation, which is not ISO8601 compliant. If you rely on the default rendering of dates, you might need to adjust your code to use isoformat() method to render dates in ISO8601 format.

Airflow packaging specification follows modern Python packaging standards (#36537).

We standardized Airflow dependency configuration to follow latest development in Python packaging by using pyproject.toml. Airflow is now compliant with those accepted PEPs:

Also we implement multiple license files support coming from Draft, not yet accepted (but supported by hatchling) PEP: * PEP 639 Improving License Clarity with Better Package Metadata

This has almost no noticeable impact on users if they are using modern Python packaging and development tools, generally speaking Airflow should behave as it did before when installing it from PyPI and it should be much easier to install it for development purposes using pip install -e ".[devel]".

The differences from the user side are:

  • Airflow extras now get extras normalized to - (following PEP-685) instead of _ and . (as it was before in some extras). When you install airflow with such extras (for example dbt.core or all_dbs) you should use - instead of _ and ..

In most modern tools this will work in backwards-compatible way, but in some old version of those tools you might need to replace _ and . with -. You can also get warnings that the extra you are installing does not exist - but usually this warning is harmless and the extra is installed anyway. It is, however, recommended to change to use - in extras in your dependency specifications for all Airflow extras.

  • Released airflow package does not contain devel, devel-*, doc and doc-gen extras. Those extras are only available when you install Airflow from sources in --editable mode. This is because those extras are only used for development and documentation building purposes and are not needed when you install Airflow for production use. Those dependencies had unspecified and varying behaviour for released packages anyway and you were not supposed to use them in released packages.

  • The all and all-* extras were not always working correctly when installing Airflow using constraints because they were also considered as development-only dependencies. With this change, those dependencies are now properly handling constraints and they will install properly with constraints, pulling the right set of providers and dependencies when constraints are used.

Graphviz dependency is now an optional one, not required one (#36647).

The graphviz dependency has been problematic as Airflow required dependency - especially for ARM-based installations. Graphviz packages require binary graphviz libraries - which is already a limitation, but they also require to install graphviz Python bindings to be build and installed. This does not work for older Linux installation but - more importantly - when you try to install Graphviz libraries for Python 3.8, 3.9 for ARM M1 MacBooks, the packages fail to install because Python bindings compilation for M1 can only work for Python 3.10+.

This is not a breaking change technically - the CLIs to render the DAGs is still there and IF you already have graphviz installed, it will continue working as it did before. The only problem when it does not work is where you do not have graphviz installed it will raise an error and inform that you need it.

Graphviz will remain to be installed for most users:

  • the Airflow Image will still contain graphviz library, because it is added there as extra

  • when previous version of Airflow has been installed already, then graphviz library is already installed there and Airflow will continue working as it did

The only change will be a new installation of new version of Airflow from the scratch, where graphviz will need to be specified as extra or installed separately in order to enable DAG rendering option.

Bug Fixes

  • Fix airflow-scheduler exiting with code 0 on exceptions (#36800)

  • Fix Callback exception when a removed task is the last one in the taskinstance list (#36693)

  • Allow anonymous user edit/show resource when set AUTH_ROLE_PUBLIC=admin (#36750)

  • Better error message when sqlite URL uses relative path (#36774)

  • Explicit string cast required to force integer-type run_ids to be passed as strings instead of integers (#36756)

  • Add log lookup exception for empty op subtypes (#35536)

  • Remove unused index on task instance (#36737)

  • Fix check on subclass for typing.Union in _infer_multiple_outputs for Python 3.10+ (#36728)

  • Make sure multiple_outputs is inferred correctly even when using TypedDict (#36652)

  • Add back FAB constant in legacy security manager (#36719)

  • Fix AttributeError when using Dagrun.update_state (#36712)

  • Do not let EventsTimetable schedule past events if catchup=False (#36134)

  • Support encryption for triggers parameters (#36492)

  • Fix the type hint for tis_query in _process_executor_events (#36655)

  • Redirect to index when user does not have permission to access a page (#36623)

  • Avoid using dict as default value in call_regular_interval (#36608)

  • Remove option to set a task instance to running state in UI (#36518)

  • Fix details tab not showing when using dynamic task mapping (#36522)

  • Raise error when DagRun fails while running dag test (#36517)

  • Refactor _manage_executor_state by refreshing TIs in batch (#36502)

  • Add flask config: MAX_CONTENT_LENGTH (#36401)

  • Fix get_leaves calculation for teardown in nested group (#36456)

  • Stop serializing timezone-naive datetime to timezone-aware datetime with UTC tz (#36379)

  • Make kubernetes decorator type annotation consistent with operator (#36405)

  • Fix Webserver returning 500 for POST requests to api/dag/*/dagrun from anonymous user (#36275)

  • Fix the required access for get_variable endpoint (#36396)

  • Fix datetime reference in DAG.is_fixed_time_schedule (#36370)

  • Fix AirflowSkipException message raised by BashOperator (#36354)

  • Allow PythonVirtualenvOperator.skip_on_exit_code to be zero (#36361)

  • Increase width of execution_date input in trigger.html (#36278)

  • Fix logging for pausing DAG (#36182)

  • Stop deserializing pickle when enable_xcom_pickling is False (#36255)

  • Check DAG read permission before accessing DAG code (#36257)

  • Enable mark task as failed/success always (#36254)

  • Create latest log dir symlink as relative link (#36019)

  • Fix Python-based decorators templating (#36103)


  • Rename concurrency label to max active tasks (#36691)

  • Restore function scoped httpx import in file_task_handler for performance (#36753)

  • Add support of Pendulum 3 (#36281)

  • Standardize airflow build process and switch to Hatchling build backend (#36537)

  • Get rid of pyarrow-hotfix for CVE-2023-47248 (#36697)

  • Make graphviz dependency optional (#36647)

  • Announce MSSQL support end in Airflow 2.9.0, add migration script hints (#36509)

  • Set min pandas dependency to 1.2.5 for all providers and airflow (#36698)

  • Bump follow-redirects from 1.15.3 to 1.15.4 in /airflow/www (#36700)

  • Provide the logger_name param to base hook in order to override the logger name (#36674)

  • Fix run type icon alignment with run type text (#36616)

  • Follow BaseHook connection fields method signature in FSHook (#36444)

  • Remove redundant docker decorator type annotations (#36406)

  • Straighten typing in workday timetable (#36296)

  • Use batch_is_authorized_dag to check if user has permission to read DAGs (#36279)

  • Replace deprecated get_accessible_dag_ids and use get_readable_dags in get_dag_warnings (#36256)

Doc Only Changes

  • Metrics tagging documentation (#36627)

  • In docs use logical_date instead of deprecated execution_date (#36654)

  • Add section about live-upgrading Airflow (#36637)

  • Replace numpy example with practical exercise demonstrating top-level code (#35097)

  • Improve and add more complete description in the architecture diagrams (#36513)

  • Improve the error message displayed when there is a webserver error (#36570)

  • Update dags.rst with information on DAG pausing (#36540)

  • Update installation prerequisites after upgrading to Debian Bookworm (#36521)

  • Add description on the ways how users should approach DB monitoring (#36483)

  • Add branching based on mapped task group example to dynamic-task-mapping.rst (#36480)

  • Add further details to replacement documentation (#36485)

  • Use cards when describing priority weighting methods (#36411)

  • Update metrics.rst for param dagrun.schedule_delay (#36404)

  • Update admonitions in Python operator doc to reflect sentiment (#36340)

  • Improve audit_logs.rst (#36213)

  • Remove Redshift mention from the list of managed Postgres backends (#36217)

Airflow 2.8.0 (2023-12-18)

Significant Changes

Raw HTML code in DAG docs and DAG params descriptions is disabled by default (#35460)

To ensure that no malicious javascript can be injected with DAG descriptions or trigger UI forms by DAG authors a new parameter webserver.allow_raw_html_descriptions was added with default value of False. If you trust your DAG authors code and want to allow using raw HTML in DAG descriptions and params, you can restore the previous behavior by setting the configuration value to True.

To ensure Airflow is secure by default, the raw HTML support in trigger UI has been super-seeded by markdown support via the description_md attribute. If you have been using description_html please migrate to description_md. The custom_html_form is now deprecated.

New Features

  • AIP-58: Add Airflow ObjectStore (AFS) (AIP-58)

  • Add XCom tab to Grid (#35719)

  • Add “literal” wrapper to disable field templating (#35017)

  • Add task context logging feature to allow forwarding messages to task logs (#32646, #32693, #35857)

  • Add Listener hooks for Datasets (#34418, #36247)

  • Allow override of navbar text color (#35505)

  • Add lightweight serialization for deltalake tables (#35462)

  • Add support for serialization of iceberg tables (#35456)

  • prev_end_date_success method access (#34528)

  • Add task parameter to set custom logger name (#34964)

  • Add pyspark decorator (#35247)

  • Add trigger as a valid option for the db clean command (#34908)

  • Add decorators for external and venv python branching operators (#35043)

  • Allow PythonVenvOperator using other index url (#33017)

  • Add Python Virtualenv Operator Caching (#33355)

  • Introduce a generic export for containerized executor logging (#34903)

  • Add ability to clear downstream tis in List Task Instances view (#34529)

  • Attribute clear_number to track DAG run being cleared (#34126)

  • Add BranchPythonVirtualenvOperator (#33356)

  • Allow PythonVenvOperator using other index url (#33017)

  • Add CLI notification commands to providers (#33116)

  • Use dropdown instead of buttons when there are more than 10 retries in log tab (#36025)


  • Add multiselect to run state in grid view (#35403)

  • Fix warning message in Connection.get_hook in case of ImportError (#36005)

  • Add processor_subdir to import_error table to handle multiple dag processors (#35956)

  • Consolidate the call of change_state to fail or success in the core executors (#35901)

  • Relax mandatory requirement for start_date when schedule=None (#35356)

  • Use ExitStack to manage mutation of secrets_backend_list in dag.test (#34620)

  • improved visibility of tasks in ActionModal for taskinstance (#35810)

  • Create directories based on AIRFLOW_CONFIG path (#35818)

  • Implements JSON-string connection representation generator (#35723)

  • Move BaseOperatorLink into the separate module (#35032)

  • Set mark_end_on_close after set_context (#35761)

  • Move external logs links to top of react logs page (#35668)

  • Change terminal mode to cbreak in execute_interactive and handle SIGINT (#35602)

  • Make raw HTML descriptions configurable (#35460)

  • Allow email field to be templated (#35546)

  • Hide logical date and run id in trigger UI form (#35284)

  • Improved instructions for adding dependencies in TaskFlow (#35406)

  • Add optional exit code to list import errors (#35378)

  • Limit query result on DB rather than client in synchronize_log_template function (#35366)

  • Allow description to be passed in when using variables CLI (#34791)

  • Allow optional defaults in required fields with manual triggered dags (#31301)

  • Permitting airflow kerberos to run in different modes (#35146)

  • Refactor commands to unify daemon context handling (#34945)

  • Add extra fields to plugins endpoint (#34913)

  • Add description to pools view (#34862)

  • Move cli’s Connection export and Variable export command print logic to a separate function (#34647)

  • Extract and reuse get_kerberos_principle func from get_kerberos_principle (#34936)

  • Change type annotation for BaseOperatorLink.operators (#35003)

  • Optimise and migrate to SA2-compatible syntax for TaskReschedule (#33720)

  • Consolidate the permissions name in SlaMissModelView (#34949)

  • Add debug log saying what’s being run to EventScheduler (#34808)

  • Increase log reader stream loop sleep duration to 1 second (#34789)

  • Resolve pydantic deprecation warnings re update_forward_refs (#34657)

  • Unify mapped task group lookup logic (#34637)

  • Allow filtering event logs by attributes (#34417)

  • Make connection login and password TEXT (#32815)

  • Ban import Dataset from airflow package in codebase (#34610)

  • Use airflow.datasets.Dataset in examples and tests (#34605)

  • Enhance task status visibility (#34486)

  • Simplify DAG trigger UI (#34567)

  • Ban import AirflowException from airflow (#34512)

  • Add descriptions for airflow resource config parameters (#34438)

  • Simplify trigger name expression (#34356)

  • Move definition of Pod*Exceptions to pod_generator (#34346)

  • Add deferred tasks to the cluster_activity view Pools Slots (#34275)

  • heartbeat failure log message fix (#34160)

  • Rename variables for dag runs (#34049)

  • Clarify new_state in OpenAPI spec (#34056)

  • Remove version top-level element from docker compose files (#33831)

  • Remove generic trigger cancelled error log (#33874)

  • Use NOT EXISTS subquery instead of tuple_not_in_condition (#33527)

  • Allow context key args to not provide a default (#33430)

  • Order triggers by - TI priority_weight when assign unassigned triggers (#32318)

  • Add metric triggerer_heartbeat (#33320)

  • Allow airflow variables export to print to stdout (#33279)

  • Workaround failing deadlock when running backfill (#32991)

  • add dag_run_ids and task_ids filter for the batch task instance API endpoint (#32705)

  • Configurable health check threshold for triggerer (#33089)

  • Rework provider manager to treat Airflow core hooks like other provider hooks (#33051)

  • Ensure DAG-level references are filled on unmap (#33083)

  • Affix webserver access_denied warning to be configurable (#33022)

  • Add support for arrays of different data types in the Trigger Form UI (#32734)

  • Add a mechanism to warn if executors override existing CLI commands (#33423)

Bug Fixes

  • Account for change in UTC offset when calculating next schedule (#35887)

  • Add read access to pools for viewer role (#35352)

  • Fix gantt chart queued duration when queued_dttm is greater than start_date for deferred tasks (#35984)

  • Avoid crushing container when directory is not found on rm (#36050)

  • Update reset_user_sessions to work from either CLI or web (#36056)

  • Fix UI Grid error when DAG has been removed. (#36028)

  • Change Trigger UI to use HTTP POST in web ui (#36026)

  • Fix airflow db shell needing an extra key press to exit (#35982)

  • Change dag grid overscroll behaviour to auto (#35717)

  • Run triggers inline with dag test (#34642)

  • Add borderWidthRight to grid for Firefox scrollbar (#35346)

  • Fix for infinite recursion due to secrets_masker (#35048)

  • Fix write processor_subdir in serialized_dag table (#35661)

  • Reload configuration for standalone dag file processor (#35725)

  • Long custom operator name overflows in graph view (#35382)

  • Add try_number to extra links query (#35317)

  • Prevent assignment of non JSON serializable values to DagRun.conf dict (#35096)

  • Numeric values in DAG details are incorrectly rendered as timestamps (#35538)

  • Fix Scheduler and triggerer crashes in daemon mode when statsd metrics are enabled (#35181)

  • Infinite UI redirection loop after deactivating an active user (#35486)

  • Bug fix fetch_callback of Partial Subset DAG (#35256)

  • Fix DagRun data interval for DeltaDataIntervalTimetable (#35391)

  • Fix query in get_dag_by_pickle util function (#35339)

  • Fix TriggerDagRunOperator failing to trigger subsequent runs when reset_dag_run=True (#35429)

  • Fix weight_rule property type in mappedoperator (#35257)

  • Bugfix/prevent concurrency with cached venv (#35258)

  • Fix dag serialization (#34042)

  • Fix py/url-redirection by replacing request.referrer by get_redirect() (#34237)

  • Fix updating variables during variable imports (#33932)

  • Use Literal from airflow.typing_compat in Airflow core (#33821)

  • Always use Literal from typing_extensions (#33794)


  • Change default MySQL client to MariaDB (#36243)

  • Mark daskexecutor provider as removed (#35965)

  • Bump FAB to 4.3.10 (#35991)

  • Mark daskexecutor provider as removed (#35965)

  • Rename Connection.to_json_dict to Connection.to_dict (#35894)

  • Upgrade to Pydantic v2 (#35551)

  • Bump moto version to >= 4.2.9 (#35687)

  • Use pyarrow-hotfix to mitigate CVE-2023-47248 (#35650)

  • Bump axios from 0.26.0 to 1.6.0 in /airflow/www/ (#35624)

  • Make docker decorator’s type annotation consistent with operator (#35568)

  • Add default to navbar_text_color and rm condition in style (#35553)

  • Avoid initiating session twice in dag_next_execution (#35539)

  • Work around typing issue in examples and providers (#35494)

  • Enable TCH004 and TCH005 rules (#35475)

  • Humanize log output about retrieved DAG(s) (#35338)

  • Switch from Black to Ruff formatter (#35287)

  • Upgrade to Flask Application Builder 4.3.9 (#35085)

  • D401 Support (#34932, #34933)

  • Use requires_access to check read permission on dag instead of checking it explicitly (#34940)

  • Deprecate lazy import AirflowException from airflow (#34541)

  • View util refactoring on mapped stuff use cases (#34638)

  • Bump postcss from 8.4.25 to 8.4.31 in /airflow/www (#34770)

  • Refactor Sqlalchemy queries to 2.0 style (#34763, #34665, #32883, #35120)

  • Change to lazy loading of io in pandas serializer (#34684)

  • Use airflow.models.dag.DAG in examples (#34617)

  • Use airflow.exceptions.AirflowException in core (#34510)

  • Check that dag_ids passed in request are consistent (#34366)

  • Refactors to make code better (#34278, #34113, #34110, #33838, #34260, #34409, #34377, #34350)

  • Suspend qubole provider (#33889)

  • Generate Python API docs for Google ADS (#33814)

  • Improve importing in modules (#33812, #33811, #33810, #33806, #33807, #33805, #33804, #33803, #33801, #33799, #33800, #33797, #33798, #34406, #33808)

  • Upgrade Elasticsearch to 8 (#33135)

Doc Only Changes

  • Add support for tabs (and other UX components) to docs (#36041)

  • Replace architecture diagram of Airflow with diagrams-generated one (#36035)

  • Add the section describing the security model of DAG Author capabilities (#36022)

  • Enhance docs for zombie tasks (#35825)

  • Reflect drop/add support of DB Backends versions in documentation (#35785)

  • More detail on mandatory task arguments (#35740)

  • Indicate usage of the re2 regex engine in the .airflowignore documentation. (#35663)

  • Update best-practices.rst (#35692)

  • Update dag-run.rst to mention Airflow’s support for extended cron syntax through croniter (#35342)

  • Update webserver.rst to include information of supported OAuth2 providers (#35237)

  • Add back dag_run to docs (#35142)

  • Fix rst code block format (#34708)

  • Add typing to concrete taskflow examples (#33417)

  • Add concrete examples for accessing context variables from TaskFlow tasks (#33296)

  • Fix links in security docs (#33329)

Airflow 2.7.3 (2023-11-06)

Significant Changes

No significant changes.

Bug Fixes

  • Fix pre-mature evaluation of tasks in mapped task group (#34337)

  • Add TriggerRule missing value in rest API (#35194)

  • Fix Scheduler crash looping when dagrun creation fails (#35135)

  • Fix test connection with codemirror and extra (#35122)

  • Fix usage of cron-descriptor since BC in v1.3.0 (#34836)

  • Fix get_plugin_info for class based listeners. (#35022)

  • Some improvements/fixes for dag_run and task_instance endpoints (#34942)

  • Fix the dags count filter in webserver home page (#34944)

  • Return only the TIs of the readable dags when ~ is provided as a dag_id (#34939)

  • Fix triggerer thread crash in daemon mode (#34931)

  • Fix wrong plugin schema (#34858)

  • Use DAG timezone in TimeSensorAsync (#33406)

  • Mark tasks with all_skipped trigger rule as skipped if any task is in upstream_failed state (#34392)

  • Add read only validation to read only fields (#33413)


  • Improve testing harness to separate DB and non-DB tests (#35160, #35333)

  • Add pytest db_test markers to our tests (#35264)

  • Add pip caching for faster build (#35026)

  • Upper bound pendulum requirement to <3.0 (#35336)

  • Limit sentry_sdk to 1.33.0 (#35298)

  • Fix subtle bug in mocking processor_agent in our tests (#35221)

  • Bump @babel/traverse from 7.16.0 to 7.23.2 in /airflow/www (#34988)

  • Bump undici from 5.19.1 to 5.26.3 in /airflow/www (#34971)

  • Remove unused set from SchedulerJobRunner (#34810)

  • Remove warning about max_tis per query > parallelism (#34742)

  • Improve modules import in Airflow core by moving some of them into a type-checking block (#33755)

  • Fix tests to respond to Python 3.12 handling of utcnow in sentry-sdk (#34946)

  • Add connexion<3.0 upper bound (#35218)

  • Limit Airflow to < 3.12 (#35123)

  • update moto version (#34938)

  • Limit WTForms to below 3.1.0 (#34943)

Doc Only Changes

  • Fix variables substitution in Airflow Documentation (#34462)

  • Added example for defaults in conn.extras (#35165)

  • Update datasets.rst issue with running example code (#35035)

  • Remove mysql-connector-python from recommended MySQL driver (#34287)

  • Fix syntax error in task dependency set_downstream example (#35075)

  • Update documentation to enable test connection (#34905)

  • Update docs errors.rst - Mention sentry “transport” configuration option (#34912)

  • Update dags.rst to put SubDag deprecation note right after the SubDag section heading (#34925)

  • Add info on getting variables and config in custom secrets backend (#34834)

  • Document BaseExecutor interface in more detail to help users in writing custom executors (#34324)

  • Fix broken link to template (#34826)

  • Fixes python_callable function assignment context kwargs example in params.rst (#34759)

  • Add missing multiple_outputs=True param in the TaskFlow example (#34812)

  • Remove extraneous '>' in provider section name (#34813)

  • Fix imports in extra link documentation (#34547)

Airflow 2.7.2 (2023-10-12)

Significant Changes

No significant changes

Bug Fixes

  • Check if the lower of provided values are sensitives in config endpoint (#34712)

  • Add support for ZoneInfo and generic UTC to fix datetime serialization (#34683, #34804)

  • Fix AttributeError: ‘Select’ object has no attribute ‘count’ during the airflow db migrate command (#34348)

  • Make dry run optional for patch task instance (#34568)

  • Fix non deterministic datetime deserialization (#34492)

  • Use iterative loop to look for mapped parent (#34622)

  • Fix is_parent_mapped value by checking if any of the parent taskgroup is mapped (#34587)

  • Avoid top-level airflow import to avoid circular dependency (#34586)

  • Add more exemptions to lengthy metric list (#34531)

  • Fix dag warning endpoint permissions (#34355)

  • Fix task instance access issue in the batch endpoint (#34315)

  • Correcting wrong time showing in grid view (#34179)

  • Fix www cluster_activity view not loading due to standaloneDagProcessor templating (#34274)

  • Set loglevel=DEBUG in ‘Not syncing DAG-level permissions’ (#34268)

  • Make param validation consistent for DAG validation and triggering (#34248)

  • Ensure details panel is shown when any tab is selected (#34136)

  • Fix issues related to access_control={} (#34114)

  • Fix not found ab_user table in the CLI session (#34120)

  • Fix FAB-related logging format interpolation (#34139)

  • Fix query bug in next_run_datasets_summary endpoint (#34143)

  • Fix for TaskGroup toggles for duplicated labels (#34072)

  • Fix the required permissions to clear a TI from the UI (#34123)

  • Reuse _run_task_session in mapped render_template_fields (#33309)

  • Fix scheduler logic to plan new dag runs by ignoring manual runs (#34027)

  • Add missing audit logs for Flask actions add, edit and delete (#34090)

  • Hide Irrelevant Dag Processor from Cluster Activity Page (#33611)

  • Remove infinite animation for pinwheel, spin for 1.5s (#34020)

  • Restore rendering of provider configuration with version_added (#34011)

Doc Only Changes

  • Clarify audit log permissions (#34815)

  • Add explanation for Audit log users (#34814)

  • Import AUTH_REMOTE_USER from FAB in WSGI middleware example (#34721)

  • Add information about drop support MsSQL as DB Backend in the future (#34375)

  • Document how to use the system’s timezone database (#34667)

  • Clarify what landing time means in doc (#34608)

  • Fix screenshot in dynamic task mapping docs (#34566)

  • Fix class reference in Public Interface documentation (#34454)

  • Clarify var.value.get and var.json.get usage (#34411)

  • Schedule default value description (#34291)

  • Docs for triggered_dataset_event (#34410)

  • Add DagRun events (#34328)

  • Provide tabular overview about trigger form param types (#34285)

  • Add link to Amazon Provider Configuration in Core documentation (#34305)

  • Add “security infrastructure” paragraph to security model (#34301)

  • Change links to SQLAlchemy 1.4 (#34288)

  • Add SBOM entry in security documentation (#34261)

  • Added more example code for XCom push and pull (#34016)

  • Add state utils to Public Airflow Interface (#34059)

  • Replace markdown style link with rst style link (#33990)

  • Fix broken link to the “” file (#33583)


  • Update min-sqlalchemy version to account for latest features used (#34293)

  • Fix SesssionExemptMixin spelling (#34696)

  • Restrict astroid version < 3 (#34658)

  • Fail dag test if defer without triggerer (#34619)

  • Fix connections exported output (#34640)

  • Don’t run isort when creating new alembic migrations (#34636)

  • Deprecate numeric type python version in PythonVirtualEnvOperator (#34359)

  • Refactor os.path.splitext to Path.* (#34352, #33669)

  • Replace = by is for type comparison (#33983)

  • Refactor integer division (#34180)

  • Refactor: Simplify comparisons (#34181)

  • Refactor: Simplify string generation (#34118)

  • Replace unnecessary dict comprehension with dict() in core (#33858)

  • Change “not all” to “any” for ease of readability (#34259)

  • Replace assert by if…raise in code (#34250, #34249)

  • Move default timezone to except block (#34245)

  • Combine similar if logic in core (#33988)

  • Refactor: Consolidate import and usage of random (#34108)

  • Consolidate importing of os.path.* (#34060)

  • Replace sequence concatenation by unpacking in Airflow core (#33934)

  • Refactor unneeded ‘continue’ jumps around the repo (#33849, #33845, #33846, #33848, #33839, #33844, #33836, #33842)

  • Remove [project] section from pyproject.toml (#34014)

  • Move the try outside the loop when this is possible in Airflow core (#33975)

  • Replace loop by any when looking for a positive value in core (#33985)

  • Do not create lists we don’t need (#33519)

  • Remove useless string join from core (#33969)

  • Add TCH001 and TCH002 rules to pre-commit to detect and move type checking modules (#33865)

  • Add cancel_trigger_ids to to_cancel dequeue in batch (#33944)

  • Avoid creating unnecessary list when parsing stats datadog tags (#33943)

  • Replace dict.items by dict.values when key is not used in core (#33940)

  • Replace lambdas with comprehensions (#33745)

  • Improve modules import in Airflow core by some of them into a type-checking block (#33755)

  • Refactor: remove unused state - SHUTDOWN (#33746, #34063, #33893)

  • Refactor: Use in-place .sort() (#33743)

  • Use literal dict instead of calling dict() in Airflow core (#33762)

  • remove unnecessary map and rewrite it using list in Airflow core (#33764)

  • Replace lambda by a def method in Airflow core (#33758)

  • Replace type func by isinstance in fab_security manager (#33760)

  • Replace single quotes by double quotes in all Airflow modules (#33766)

  • Merge multiple isinstance calls for the same object in a single call (#33767)

  • Use a single statement with multiple contexts instead of nested statements in core (#33769)

  • Refactor: Use f-strings (#33734, #33455)

  • Refactor: Use random.choices (#33631)

  • Use str.splitlines() to split lines (#33592)

  • Refactor: Remove useless str() calls (#33629)

  • Refactor: Improve detection of duplicates and list sorting (#33675)

  • Simplify conditions on len() (#33454)

Airflow 2.7.1 (2023-09-07)

Significant Changes

CronTriggerTimetable is now less aggressive when trying to skip a run (#33404)

When setting catchup=False, CronTriggerTimetable no longer skips a run if the scheduler does not query the timetable immediately after the previous run has been triggered.

This should not affect scheduling in most cases, but can change the behaviour if a DAG is paused-unpaused to manually skip a run. Previously, the timetable (with catchup=False) would only start a run after a DAG is unpaused, but with this change, the scheduler would try to look at little bit back to schedule the previous run that covers a part of the period when the DAG was paused. This means you will need to keep a DAG paused longer (namely, for the entire cron period to pass) to really skip a run.

Note that this is also the behaviour exhibited by various other cron-based scheduling tools, such as anacron.

conf.set() becomes case insensitive to match conf.get() behavior (#33452)

Also, conf.get() will now break if used with non-string parameters.

conf.set(section, key, value) used to be case sensitive, i.e. conf.set("SECTION", "KEY", value) and conf.set("section", "key", value) were stored as two distinct configurations. This was inconsistent with the behavior of conf.get(section, key), which was always converting the section and key to lower case.

As a result, configuration options set with upper case characters in the section or key were unreachable. That’s why we are now converting section and key to lower case in conf.set too.

We also changed a bit the behavior of conf.get(). It used to allow objects that are not strings in the section or key. Doing this will now result in an exception. For instance, conf.get("section", 123) needs to be replaced with conf.get("section", "123").

Bug Fixes

  • Ensure that tasks wait for running indirect setup (#33903)

  • Respect “soft_fail” for core async sensors (#33403)

  • Differentiate 0 and unset as a default param values (#33965)

  • Raise 404 from Variable PATCH API if variable is not found (#33885)

  • Fix MappedTaskGroup tasks not respecting upstream dependency (#33732)

  • Add limit 1 if required first value from query result (#33672)

  • Fix UI DAG counts including deleted DAGs (#33778)

  • Fix cleaning zombie RESTARTING tasks (#33706)

  • SECURITY_MANAGER_CLASS should be a reference to class, not a string (#33690)

  • Add back get_url_for_login in security manager (#33660)

  • Fix 2.7.0 db migration job errors (#33652)

  • Set context inside templates (#33645)

  • Treat dag-defined access_control as authoritative if defined (#33632)

  • Bind engine before attempting to drop archive tables (#33622)

  • Add a fallback in case no first name and last name are set (#33617)

  • Sort data before groupby in TIS duration calculation (#33535)

  • Stop adding values to rendered templates UI when there is no dagrun (#33516)

  • Set strict to True when parsing dates in webserver views (#33512)

  • Use in custom SA types (#33503)

  • Do not return ongoing dagrun when a end_date is less than utcnow (#33488)

  • Fix a bug in formatDuration method (#33486)

  • Make conf.set case insensitive (#33452)

  • Allow timetable to slightly miss catchup cutoff (#33404)

  • Respect soft_fail argument when poke is called (#33401)

  • Create a new method used to resume the task in order to implement specific logic for operators (#33424)

  • Fix DagFileProcessor interfering with dags outside its processor_subdir (#33357)

  • Remove the unnecessary <br> text in Provider’s view (#33326)

  • Respect soft_fail argument when ExternalTaskSensor runs in deferrable mode (#33196)

  • Fix handling of default value and serialization of Param class (#33141)

  • Check if the dynamically-added index is in the table schema before adding (#32731)

  • Fix rendering the mapped parameters when using expand_kwargs method (#32272)

  • Fix dependencies for celery and opentelemetry for Python 3.8 (#33579)


  • Bring back Pydantic 1 compatibility (#34081, #33998)

  • Use a trimmed version of for PyPI (#33637)

  • Upgrade to Pydantic 2 (#33956)

  • Reorganize devel_only extra in Airflow’s (#33907)

  • Bumping FAB to 4.3.4 in order to fix issues with filters (#33931)

  • Add minimum requirement for sqlalchemy to 1.4.24 (#33892)

  • Update version_added field for configs in config file (#33509)

  • Replace OrderedDict with plain dict (#33508)

  • Consolidate import and usage of itertools (#33479)

  • Static check fixes (#33462)

  • Import utc from datetime and normalize its import (#33450)

  • D401 Support (#33352, #33339, #33337, #33336, #33335, #33333, #33338)

  • Fix some missing type hints (#33334)

  • D205 Support - Stragglers (#33301, #33298, #33297)

  • Refactor: Simplify code (#33160, #33270, #33268, #33267, #33266, #33264, #33292, #33453, #33476, #33567, #33568, #33480, #33753, #33520, #33623)

  • Fix Pydantic warning about orm_mode rename (#33220)

  • Add MySQL 8.1 to supported versions. (#33576)

  • Remove Pydantic limitation for version < 2 (#33507)

Doc only changes

  • Add documentation explaining template_ext (and how to override it) (#33735)

  • Explain how users can check if python code is top-level (#34006)

  • Clarify that DAG authors can also run code in DAG File Processor (#33920)

  • Fix broken link in Modules Management page (#33499)

  • Fix secrets backend docs (#33471)

  • Fix config description for base_log_folder (#33388)

Airflow 2.7.0 (2023-08-18)

Significant Changes

Remove Python 3.7 support (#30963)

As of now, Python 3.7 is no longer supported by the Python community. Therefore, to use Airflow 2.7.0, you must ensure your Python version is either 3.8, 3.9, 3.10, or 3.11.

Old Graph View is removed (#32958)

The old Graph View is removed. The new Graph View is the default view now.

The trigger UI form is skipped in web UI if no parameters are defined in a DAG (#33351)

If you are using dag_run.conf dictionary and web UI JSON entry to run your DAG you should either:

  • Add params to your DAG

  • Enable the new configuration show_trigger_form_if_no_params to bring back old behaviour

The “db init”, “db upgrade” commands and “[database] load_default_connections” configuration options are deprecated (#33136).

Instead, you should use “airflow db migrate” command to create or upgrade database. This command will not create default connections. In order to create default connections you need to run “airflow connections create-default-connections” explicitly, after running “airflow db migrate”.

In case of SMTP SSL connection, the context now uses the “default” context (#33070)

The “default” context is Python’s default_ssl_contest instead of previously used “none”. The default_ssl_context provides a balance between security and compatibility but in some cases, when certificates are old, self-signed or misconfigured, it might not work. This can be configured by setting “ssl_context” in “email” configuration of Airflow.

Setting it to “none” brings back the “none” setting that was used in Airflow 2.6 and before, but it is not recommended due to security reasons ad this setting disables validation of certificates and allows MITM attacks.

Disable default allowing the testing of connections in UI, API and CLI(#32052)

For security reasons, the test connection functionality is disabled by default across Airflow UI, API and CLI. The availability of the functionality can be controlled by the test_connection flag in the core section of the Airflow configuration (airflow.cfg). It can also be controlled by the environment variable AIRFLOW__CORE__TEST_CONNECTION.

The following values are accepted for this config param: 1. Disabled: Disables the test connection functionality and disables the Test Connection button in the UI.

This is also the default value set in the Airflow configuration. 2. Enabled: Enables the test connection functionality and activates the Test Connection button in the UI.

3. Hidden: Disables the test connection functionality and hides the Test Connection button in UI.

For more information on capabilities of users, see the documentation: It is strongly advised to not enable the feature until you make sure that only highly trusted UI/API users have “edit connection” permissions.

The xcomEntries API disables support for the deserialize flag by default (#32176)

For security reasons, the /dags/*/dagRuns/*/taskInstances/*/xcomEntries/* API endpoint now disables the deserialize option to deserialize arbitrary XCom values in the webserver. For backward compatibility, server admins may set the [api] enable_xcom_deserialize_support config to True to enable the flag and restore backward compatibility.

However, it is strongly advised to not enable the feature, and perform deserialization at the client side instead.

Change of the default Celery application name (#32526)

Default name of the Celery application changed from airflow.executors.celery_executor to airflow.providers.celery.executors.celery_executor.

You should change both your configuration and Health check command to use the new name:
  • in configuration (celery_app_name configuration in celery section) use airflow.providers.celery.executors.celery_executor

  • in your Health check command use

The default value for scheduler.max_tis_per_query is changed from 512 to 16 (#32572)

This change is expected to make the Scheduler more responsive.

scheduler.max_tis_per_query needs to be lower than core.parallelism. If both were left to their default value previously, the effective default value of scheduler.max_tis_per_query was 32 (because it was capped at core.parallelism).

To keep the behavior as close as possible to the old config, one can set scheduler.max_tis_per_query = 0, in which case it’ll always use the value of core.parallelism.

Some executors have been moved to corresponding providers (#32767)

In order to use the executors, you need to install the providers:

  • for Celery executors you need to install apache-airflow-providers-celery package >= 3.3.0

  • for Kubernetes executors you need to install apache-airflow-providers-cncf-kubernetes package >= 7.4.0

  • For Dask executors you need to install apache-airflow-providers-daskexecutor package in any version

You can achieve it also by installing airflow with [celery], [cncf.kubernetes], [daskexecutor] extras respectively.

Users who base their images on the apache/airflow reference image (not slim) should be unaffected - the base reference image comes with all the three providers installed.

Improvement Changes

PostgreSQL only improvement: Added index on taskinstance table (#30762)

This index seems to have great positive effect in a setup with tens of millions such rows.

New Features

  • Add OpenTelemetry to Airflow (AIP-49)

  • Trigger Button - Implement Part 2 of AIP-50 (#31583)

  • Removing Executor Coupling from Core Airflow (AIP-51)

  • Automatic setup and teardown tasks (AIP-52)

  • OpenLineage in Airflow (AIP-53)

  • Experimental: Add a cache to Variable and Connection when called at dag parsing time (#30259)

  • Enable pools to consider deferred tasks (#32709)

  • Allows to choose SSL context for SMTP connection (#33070)

  • New gantt tab (#31806)

  • Load plugins from providers (#32692)

  • Add BranchExternalPythonOperator (#32787, #33360)

  • Add option for storing configuration description in providers (#32629)

  • Introduce Heartbeat Parameter to Allow Per-LocalTaskJob Configuration (#32313)

  • Add Executors discovery and documentation (#32532)

  • Add JobState for job state constants (#32549)

  • Add config to disable the ‘deserialize’ XCom API flag (#32176)

  • Show task instance in web UI by custom operator name (#31852)

  • Add default_deferrable config (#31712)

  • Introducing AirflowClusterPolicySkipDag exception (#32013)

  • Use reactflow for datasets graph (#31775)

  • Add an option to load the dags from db for command tasks run (#32038)

  • Add version of chain which doesn’t require matched lists (#31927)

  • Use operator_name instead of task_type in UI (#31662)

  • Add --retry and --retry-delay to airflow db check (#31836)

  • Allow skipped task state (#31421)

  • Add a new config for celery result_backend engine options (#30426)

  • UI Add Cluster Activity Page (#31123, #32446)

  • Adding keyboard shortcuts to common actions (#30950)

  • Adding more information to kubernetes executor logs (#29929)

  • Add support for configuring custom alembic file (#31415)

  • Add running and failed status tab for DAGs on the UI (#30429)

  • Add multi-select, proposals and labels for trigger form (#31441)

  • Making webserver config customizable (#29926)

  • Render DAGCode in the Grid View as a tab (#31113)

  • Add rest endpoint to get option of configuration (#31056)

  • Add section query param in get config rest API (#30936)

  • Create metrics to track Scheduled->Queued->Running task state transition times (#30612)

  • Mark Task Groups as Success/Failure (#30478)

  • Add CLI command to list the provider trigger info (#30822)

  • Add Fail Fast feature for DAGs (#29406)


  • Improve graph nesting logic (#33421)

  • Configurable health check threshold for triggerer (#33089, #33084)

  • add dag_run_ids and task_ids filter for the batch task instance API endpoint (#32705)

  • Ensure DAG-level references are filled on unmap (#33083)

  • Add support for arrays of different data types in the Trigger Form UI (#32734)

  • Always show gantt and code tabs (#33029)

  • Move listener success hook to after SQLAlchemy commit (#32988)

  • Rename db upgrade to db migrate and add connections create-default-connections (#32810, #33136)

  • Remove old gantt chart and redirect to grid views gantt tab (#32908)

  • Adjust graph zoom based on selected task (#32792)

  • Call listener on_task_instance_running after rendering templates (#32716)

  • Display execution_date in graph view task instance tooltip. (#32527)

  • Allow configuration to be contributed by providers (#32604, #32755, #32812)

  • Reduce default for max TIs per query, enforce <= parallelism (#32572)

  • Store config description in Airflow configuration object (#32669)

  • Use isdisjoint instead of not intersection (#32616)

  • Speed up calculation of leaves and roots for task groups (#32592)

  • Kubernetes Executor Load Time Optimizations (#30727)

  • Save DAG parsing time if dag is not schedulable (#30911)

  • Updates health check endpoint to include dag_processor status. (#32382)

  • Disable default allowing the testing of connections in UI, API and CLI (#32052, #33342)

  • Fix config var types under the scheduler section (#32132)

  • Allow to sort Grid View alphabetically (#32179)

  • Add hostname to triggerer metric [triggers.running] (#32050)

  • Improve DAG ORM cleanup code (#30614)

  • TriggerDagRunOperator: Add wait_for_completion to template_fields (#31122)

  • Open links in new tab that take us away from Airflow UI (#32088)

  • Only show code tab when a task is not selected (#31744)

  • Add descriptions for celery and dask cert configs (#31822)

  • PythonVirtualenvOperator termination log in alert (#31747)

  • Migration of all DAG details to existing grid view dag details panel (#31690)

  • Add a diagram to help visualize timer metrics (#30650)

  • Celery Executor load time optimizations (#31001)

  • Update code style for airflow db commands to SQLAlchemy 2.0 style (#31486)

  • Mark uses of md5 as “not-used-for-security” in FIPS environments (#31171)

  • Add pydantic support to serde (#31565)

  • Enable search in note column in DagRun and TaskInstance (#31455)

  • Save scheduler execution time by adding new Index idea for dag_run (#30827)

  • Save scheduler execution time by caching dags (#30704)

  • Support for sorting DAGs by Last Run Date in the web UI (#31234)

  • Better typing for Job and JobRunners (#31240)

  • Add sorting logic by created_date for fetching triggers (#31151)

  • Remove DAGs.can_create on access control doc, adjust test fixture (#30862)

  • Split Celery logs into stdout/stderr (#30485)

  • Decouple metrics clients and validators into their own modules (#30802)

  • Description added for pagination in get_log api (#30729)

  • Optimize performance of scheduling mapped tasks (#30372)

  • Add sentry transport configuration option (#30419)

  • Better message on deserialization error (#30588)

Bug Fixes

  • Remove user sessions when resetting password (#33347)

  • Gantt chart: Use earliest/oldest ti dates if different than dag run start/end (#33215)

  • Fix virtualenv detection for Python virtualenv operator (#33223)

  • Correctly log when there are problems trying to chmod airflow.cfg (#33118)

  • Pass app context to (#32759)

  • Skip served logs for non-running task try (#32561)

  • Fix reload gunicorn workers (#32102)

  • Fix future DagRun rarely triggered by race conditions when max_active_runs reached its upper limit. (#31414)

  • Fix BaseOperator get_task_instances query (#33054)

  • Fix issue with using the various state enum value in logs (#33065)

  • Use string concatenation to prepend base URL for log_url (#33063)

  • Update graph nodes with operator style attributes (#32822)

  • Affix webserver access_denied warning to be configurable (#33022)

  • Only load task action modal if user can edit (#32992)

  • OpenAPI Spec fix nullable alongside $ref (#32887)

  • Make the decorators of PythonOperator sub-classes extend its decorator (#32845)

  • Fix check if virtualenv is installed in PythonVirtualenvOperator (#32939)

  • Unwrap Proxy before checking __iter__ in is_container() (#32850)

  • Override base log folder by using task handler’s base_log_folder (#32781)

  • Catch arbitrary exception from run_job to prevent zombie scheduler (#32707)

  • Fix depends_on_past work for dynamic tasks (#32397)

  • Sort extra_links for predictable order in UI. (#32762)

  • Fix prefix group false graph (#32764)

  • Fix bad delete logic for dagruns (#32684)

  • Fix bug in prune_dict where empty dict and list would be removed even in strict mode (#32573)

  • Add explicit browsers list and correct rel for blank target links (#32633)

  • Handle returned None when multiple_outputs is True (#32625)

  • Fix returned value when ShortCircuitOperator condition is falsy and there is not downstream tasks (#32623)

  • Fix returned value when ShortCircuitOperator condition is falsy (#32569)

  • Fix rendering of dagRunTimeout (#32565)

  • Fix permissions on /blocked endpoint (#32571)

  • Bugfix, prevent force of unpause on trigger DAG (#32456)

  • Fix data interval in cli.dags.trigger command output (#32548)

  • Strip whitespaces from airflow connections form (#32292)

  • Add timedelta support for applicable arguments of sensors (#32515)

  • Fix incorrect default on readonly property in our API (#32510)

  • Add xcom map_index as a filter to xcom endpoint (#32453)

  • Fix CLI commands when custom timetable is used (#32118)

  • Use WebEncoder to encode DagRun.conf in DagRun’s list view (#32385)

  • Fix logic of the skip_all_except method (#31153)

  • Ensure dynamic tasks inside dynamic task group only marks the (#32354)

  • Handle the cases that webserver.expose_config is set to non-sensitive-only instead of boolean value (#32261)

  • Add retry functionality for handling process termination caused by database network issues (#31998)

  • Adapt Notifier for sla_miss_callback (#31887)

  • Fix XCOM view (#31807)

  • Fix for “Filter dags by tag” flickering on initial load of dags.html (#31578)

  • Fix where expanding resizer would not expanse grid view (#31581)

  • Fix MappedOperator-BaseOperator attr sync check (#31520)

  • Always pass named type_ arg to drop_constraint (#31306)

  • Fix bad drop_constraint call in migrations (#31302)

  • Resolving problems with redesigned grid view (#31232)

  • Support requirepass redis sentinel (#30352)

  • Fix webserver crash when calling get /config (#31057)


  • Modify pathspec version restriction (#33349)

  • Refactor: Simplify code in dag_processing (#33161)

  • For now limit Pydantic to < 2.0.0 (#33235)

  • Refactor: Simplify code in models (#33181)

  • Add elasticsearch group to pre-2.7 defaults (#33166)

  • Refactor: Simplify dict manipulation in airflow/cli (#33159)

  • Remove redundant dict.keys() call (#33158)

  • Upgrade ruff to latest 0.0.282 version in pre-commits (#33152)

  • Move openlineage configuration to provider (#33124)

  • Replace State by TaskInstanceState in Airflow executors (#32627)

  • Get rid of Python 2 numeric relics (#33050)

  • Remove legacy dag code (#33058)

  • Remove legacy task instance modal (#33060)

  • Remove old graph view (#32958)

  • Move CeleryExecutor to the celery provider (#32526, #32628)

  • Move all k8S classes to cncf.kubernetes provider (#32767, #32891)

  • Refactor existence-checking SQL to helper (#32790)

  • Extract Dask executor to new daskexecutor provider (#32772)

  • Remove atlas configuration definition (#32776)

  • Add Redis task handler (#31855)

  • Move writing configuration for webserver to main (webserver limited) (#32766)

  • Improve getting the query count in Airflow API endpoints (#32630)

  • Remove click upper bound (#32634)

  • Add D400 pydocstyle check - core Airflow only (#31297)

  • D205 Support (#31742, #32575, #32213, #32212, #32591, #32449, #32450)

  • Bump word-wrap from 1.2.3 to 1.2.4 in /airflow/www (#32680)

  • Strong-type all single-state enum values (#32537)

  • More strong typed state conversion (#32521)

  • SQL query improvements in utils/ (#32518)

  • Bump semver from 6.3.0 to 6.3.1 in /airflow/www (#32506)

  • Bump jsonschema version to 4.18.0 (#32445)

  • Bump stylelint from 13.13.1 to 15.10.1 in /airflow/www (#32435)

  • Bump tough-cookie from 4.0.0 to 4.1.3 in /airflow/www (#32443)

  • upgrade flask-appbuilder (#32054)

  • Support Pydantic 2 (#32366)

  • Limit click until we fix mypy issues (#32413)

  • A couple of minor cleanups (#31890)

  • Replace State usages with strong-typed enums (#31735)

  • Upgrade ruff to 0.272 (#31966)

  • Better error message when serializing callable without name (#31778)

  • Improve the views module a bit (#31661)

  • Remove asynctest (#31664)

  • Refactor sqlalchemy queries to 2.0 style (#31569, #31772, #32350, #32339, #32474, #32645)

  • Remove Python 3.7 support (#30963)

  • Bring back min-airflow-version for preinstalled providers (#31469)

  • Docstring improvements (#31375)

  • Improve typing in SchedulerJobRunner (#31285)

  • Upgrade ruff to 0.0.262 (#30809)

  • Upgrade to MyPy 1.2.0 (#30687)

Docs only changes

  • Clarify UI user types in security model (#33021)

  • Add links to DAGRun / DAG / Task in templates-ref.rst (#33013)

  • Add docs of how to test for DAG Import Errors (#32811)

  • Clean-up of our new security page (#32951)

  • Cleans up Extras reference page (#32954)

  • Update Dag trigger API and command docs (#32696)

  • Add deprecation info to the Airflow modules and classes docstring (#32635)

  • Formatting installation doc to improve readability (#32502)

  • Fix triggerer HA doc (#32454)

  • Add type annotation to code examples (#32422)

  • Document cron and delta timetables (#32392)

  • Update index.rst doc to correct grammar (#32315)

  • Fixing small typo in (#31474)

  • Separate out and clarify policies for providers (#30657)

  • Fix docs: add an “apache” prefix to pip install (#30681)

Airflow 2.6.3 (2023-07-10)

Significant Changes

Default allowed pattern of a run_id has been changed to ^[A-Za-z0-9_.~:+-]+$ (#32293).

Previously, there was no validation on the run_id string. There is now a validation regex that can be set by configuring allowed_run_id_pattern in scheduler section.

Bug Fixes

  • Use linear time regular expressions (#32303)

  • Fix triggerers alive check and add a new conf for triggerer heartbeat rate (#32123)

  • Catch the exception that triggerer initialization failed (#31999)

  • Hide sensitive values from extra in connection edit form (#32309)

  • Sanitize DagRun.run_id and allow flexibility (#32293)

  • Add triggerer canceled log (#31757)

  • Fix try number shown in the task view (#32361)

  • Retry transactions on occasional deadlocks for rendered fields (#32341)

  • Fix behaviour of LazyDictWithCache when import fails (#32248)

  • Remove executor_class from Job - fixing backfill for custom executors (#32219)

  • Fix bugged singleton implementation (#32218)

  • Use mapIndex to display extra links per mapped task. (#32154)

  • Ensure that main triggerer thread exits if the async thread fails (#32092)

  • Use re2 for matching untrusted regex (#32060)

  • Render list items in rendered fields view (#32042)

  • Fix hashing of dag_dependencies in serialized dag (#32037)

  • Return None if an XComArg fails to resolve in a multiple_outputs Task (#32027)

  • Check for DAG ID in query param from url as well as kwargs (#32014)

  • Flash an error message instead of failure in rendered-templates when map index is not found (#32011)

  • Fix ExternalTaskSensor when there is no task group TIs for the current execution date (#32009)

  • Fix number param html type in trigger template (#31980, #31946)

  • Fix masking nested variable fields (#31964)

  • Fix operator_extra_links property serialization in mapped tasks (#31904)

  • Decode old-style nested Xcom value (#31866)

  • Add a check for trailing slash in webserver base_url (#31833)

  • Fix connection uri parsing when the host includes a scheme (#31465)

  • Fix database session closing with xcom_pull and inlets (#31128)

  • Fix DAG’s on_failure_callback is not invoked when task failed during testing dag. (#30965)

  • Fix airflow module version check when using ExternalPythonOperator and debug logging level (#30367)


  • Fix task.sensor annotation in type stub (#31954)

  • Limit Pydantic to < 2.0.0 until we solve 2.0.0 incompatibilities (#32312)

  • Fix Pydantic 2 pickiness about model definition (#32307)

Doc only changes

  • Add explanation about tag creation and cleanup (#32406)

  • Minor updates to docs (#32369, #32315, #32310, #31794)

  • Clarify Listener API behavior (#32269)

  • Add information for users who ask for requirements (#32262)

  • Add links to DAGRun / DAG / Task in Templates Reference (#32245)

  • Add comment to warn off a potential wrong fix (#32230)

  • Add a note that we’ll need to restart triggerer to reflect any trigger change (#32140)

  • Adding missing hyperlink to the tutorial documentation (#32105)

  • Added difference between Deferrable and Non-Deferrable Operators (#31840)

  • Add comments explaining need for special “trigger end” log message (#31812)

  • Documentation update on Plugin updates. (#31781)

  • Fix SemVer link in security documentation (#32320)

  • Update security model of Airflow (#32098)

  • Update references to restructured documentation from Airflow core (#32282)

  • Separate out advanced logging configuration (#32131)

  • Add to Airflow in prominent places (#31977)

Airflow 2.6.2 (2023-06-17)

Significant Changes

No significant changes.

Bug Fixes

  • Cascade update of TaskInstance to TaskMap table (#31445)

  • Fix Kubernetes executors detection of deleted pods (#31274)

  • Use keyword parameters for migration methods for mssql (#31309)

  • Control permissibility of driver config in extra from airflow.cfg (#31754)

  • Fixing broken links in openapi/v1.yaml (#31619)

  • Hide old alert box when testing connection with different value (#31606)

  • Add TriggererStatus to OpenAPI spec (#31579)

  • Resolving issue where Grid won’t un-collapse when Details is collapsed (#31561)

  • Fix sorting of tags (#31553)

  • Add the missing map_index to the xcom key when skipping downstream tasks (#31541)

  • Fix airflow users delete CLI command (#31539)

  • Include triggerer health status in Airflow /health endpoint (#31529)

  • Remove dependency already registered for this task warning (#31502)

  • Use kube_client over default CoreV1Api for deleting pods (#31477)

  • Ensure min backoff in base sensor is at least 1 (#31412)

  • Fix max_active_tis_per_dagrun for Dynamic Task Mapping (#31406)

  • Fix error handling when pre-importing modules in DAGs (#31401)

  • Fix dropdown default and adjust tutorial to use 42 as default for proof (#31400)

  • Fix crash when clearing run with task from normal to mapped (#31352)

  • Make BaseJobRunner a generic on the job class (#31287)

  • Fix url_for_asset fallback and 404 on DAG Audit Log (#31233)

  • Don’t present an undefined execution date (#31196)

  • Added spinner activity while the logs load (#31165)

  • Include rediss to the list of supported URL schemes (#31028)

  • Optimize scheduler by skipping “non-schedulable” DAGs (#30706)

  • Save scheduler execution time during search for queued dag_runs (#30699)

  • Fix ExternalTaskSensor to work correctly with task groups (#30742)

  • Fix DAG.access_control can’t sync when clean access_control (#30340)

  • Fix failing get_safe_url tests for latest Python 3.8 and 3.9 (#31766)

  • Fix typing for POST user endpoint (#31767)

  • Fix wrong update for nested group default args (#31776)

  • Fix overriding default_args in nested task groups (#31608)

  • Mark [secrets] backend_kwargs as a sensitive config (#31788)

  • Executor events are not always “exited” here (#30859)

  • Validate connection IDs (#31140)


  • Add Python 3.11 support (#27264)

  • Replace unicodecsv with standard csv library (#31693)

  • Bring back unicodecsv as dependency of Airflow (#31814)

  • Remove found_descendents param from get_flat_relative_ids (#31559)

  • Fix typing in external task triggers (#31490)

  • Wording the next and last run DAG columns better (#31467)

  • Skip auto-document things with :meta private: (#31380)

  • Add an example for sql_alchemy_connect_args conf (#31332)

  • Convert dask upper-binding into exclusion (#31329)

  • Upgrade FAB to 4.3.1 (#31203)

  • Added metavar and choices to –state flag in airflow dags list-jobs CLI for suggesting valid state arguments. (#31308)

  • Use only one line for tmp dir log (#31170)

  • Rephrase comment in (#31312)

  • Add fullname to owner on logging (#30185)

  • Make connection id validation consistent across interface (#31282)

  • Use single source of truth for sensitive config items (#31820)

Doc only changes

  • Add docstring and signature for _read_remote_logs (#31623)

  • Remove note about triggerer being 3.7+ only (#31483)

  • Fix version support information (#31468)

  • Add missing BashOperator import to documentation example (#31436)

  • Fix task.branch error caused by incorrect initial parameter (#31265)

  • Update callbacks documentation (errors and context) (#31116)

  • Add an example for dynamic task mapping with non-TaskFlow operator (#29762)

  • Few doc fixes - links, grammar and wording (#31719)

  • Add description in a few more places about adding airflow to pip install (#31448)

  • Fix table formatting in docker build documentation (#31472)

  • Update documentation for constraints installation (#31882)

Airflow 2.6.1 (2023-05-16)

Significant Changes

Clarifications of the external Health Check mechanism and using Job classes (#31277).

In the past SchedulerJob and other *Job classes are known to have been used to perform external health checks for Airflow components. Those are, however, Airflow DB ORM related classes. The DB models and database structure of Airflow are considered as internal implementation detail, following public interface). Therefore, they should not be used for external health checks. Instead, you should use the airflow jobs check CLI command (introduced in Airflow 2.1) for that purpose.

Bug Fixes

  • Fix calculation of health check threshold for SchedulerJob (#31277)

  • Fix timestamp parse failure for k8s executor pod tailing (#31175)

  • Make sure that DAG processor job row has filled value in job_type column (#31182)

  • Fix section name reference for api_client_retry_configuration (#31174)

  • Ensure the KPO runs pod mutation hooks correctly (#31173)

  • Remove worrying log message about redaction from the OpenLineage plugin (#31149)

  • Move interleave_timestamp_parser config to the logging section (#31102)

  • Ensure that we check worker for served logs if no local or remote logs found (#31101)

  • Fix MappedTaskGroup import in taskinstance file (#31100)

  • Format DagBag.dagbag_report() Output (#31095)

  • Mask task attribute on task detail view (#31125)

  • Fix template error when iterating None value and fix params documentation (#31078)

  • Fix apache-hive extra so it installs the correct package (#31068)

  • Fix issue with zip files in DAGs folder when pre-importing Airflow modules (#31061)

  • Move TaskInstanceKey to a separate file to fix circular import (#31033, #31204)

  • Fix deleting DagRuns and TaskInstances that have a note (#30987)

  • Fix airflow providers get command output (#30978)

  • Fix Pool schema in the OpenAPI spec (#30973)

  • Add support for dynamic tasks with template fields that contain pandas.DataFrame (#30943)

  • Use the Task Group explicitly passed to ‘partial’ if any (#30933)

  • Fix order_by request in list DAG rest api (#30926)

  • Include node height/width in center-on-task logic (#30924)

  • Remove print from dag trigger command (#30921)

  • Improve task group UI in new graph (#30918)

  • Fix mapped states in grid view (#30916)

  • Fix problem with displaying graph (#30765)

  • Fix backfill KeyError when try_number out of sync (#30653)

  • Re-enable clear and setting state in the TaskInstance UI (#30415)

  • Prevent DagRun’s state and start_date from being reset when clearing a task in a running DagRun (#30125)


  • Upper bind dask until they solve a side effect in their test suite (#31259)

  • Show task instances affected by clearing in a table (#30633)

  • Fix missing models in API documentation (#31021)

Doc only changes

  • Improve description of the dag_processing.processes metric (#30891)

  • Improve Quick Start instructions (#30820)

  • Add section about missing task logs to the FAQ (#30717)

  • Mount the config directory in docker compose (#30662)

  • Update version_added config field for might_contain_dag and metrics_allow_list (#30969)

Airflow 2.6.0 (2023-04-30)

Significant Changes

Default permissions of file task handler log directories and files has been changed to “owner + group” writeable (#29506).

Default setting handles case where impersonation is needed and both users (airflow and the impersonated user) have the same group set as main group. Previously the default was also other-writeable and the user might choose to use the other-writeable setting if they wish by configuring file_task_handler_new_folder_permissions and file_task_handler_new_file_permissions in logging section.

SLA callbacks no longer add files to the dag processor manager’s queue (#30076)

This stops SLA callbacks from keeping the dag processor manager permanently busy. It means reduced CPU, and fixes issues where SLAs stop the system from seeing changes to existing dag files. Additional metrics added to help track queue state.

The cleanup() method in BaseTrigger is now defined as asynchronous (following async/await) pattern (#30152).

This is potentially a breaking change for any custom trigger implementations that override the cleanup() method and uses synchronous code, however using synchronous operations in cleanup was technically wrong, because the method was executed in the main loop of the Triggerer and it was introducing unnecessary delays impacting other triggers. The change is unlikely to affect any existing trigger implementations.

The gauge scheduler.tasks.running no longer exist (#30374)

The gauge has never been working and its value has always been 0. Having an accurate value for this metric is complex so it has been decided that removing this gauge makes more sense than fixing it with no certainty of the correctness of its value.

Consolidate handling of tasks stuck in queued under new task_queued_timeout config (#30375)

Logic for handling tasks stuck in the queued state has been consolidated, and the all configurations responsible for timing out stuck queued tasks have been deprecated and merged into [scheduler] task_queued_timeout. The configurations that have been deprecated are [kubernetes] worker_pods_pending_timeout, [celery] stalled_task_timeout, and [celery] task_adoption_timeout. If any of these configurations are set, the longest timeout will be respected. For example, if [celery] stalled_task_timeout is 1200, and [scheduler] task_queued_timeout is 600, Airflow will set [scheduler] task_queued_timeout to 1200.

Improvement Changes

Display only the running configuration in configurations view (#28892)

The configurations view now only displays the running configuration. Previously, the default configuration was displayed at the top but it was not obvious whether this default configuration was overridden or not. Subsequently, the non-documented endpoint /configuration?raw=true is deprecated and will be removed in Airflow 3.0. The HTTP response now returns an additional Deprecation header. The /config endpoint on the REST API is the standard way to fetch Airflow configuration programmatically.

Explicit skipped states list for ExternalTaskSensor (#29933)

ExternalTaskSensor now has an explicit skipped_states list

Miscellaneous Changes

Handle OverflowError on exponential backoff in next_run_calculation (#28172)

Maximum retry task delay is set to be 24h (86400s) by default. You can change it globally via core.max_task_retry_delay parameter.

Move Hive macros to the provider (#28538)

The Hive Macros (hive.max_partition, hive.closest_ds_partition) are available only when Hive Provider is installed. Please install Hive Provider > 5.1.0 when using those macros.

Updated app to support configuring the caching hash method for FIPS v2 (#30675)

Various updates for FIPS-compliance when running Airflow in Python 3.9+. This includes a new webserver option, caching_hash_method, for changing the default flask caching method.

New Features

  • AIP-50 Trigger DAG UI Extension with Flexible User Form Concept (#27063,#29376)

  • Skip PythonVirtualenvOperator task when it returns a provided exit code (#30690)

  • rename skip_exit_code to skip_on_exit_code and allow providing multiple codes (#30692)

  • Add skip_on_exit_code also to ExternalPythonOperator (#30738)

  • Add max_active_tis_per_dagrun for Dynamic Task Mapping (#29094)

  • Add serializer for pandas dataframe (#30390)

  • Deferrable TriggerDagRunOperator (#30292)

  • Add command to get DAG Details via CLI (#30432)

  • Adding ContinuousTimetable and support for @continuous schedule_interval (#29909)

  • Allow customized rules to check if a file has dag (#30104)

  • Add a new Airflow conf to specify a SSL ca cert for Kubernetes client (#30048)

  • Bash sensor has an explicit retry code (#30080)

  • Add filter task upstream/downstream to grid view (#29885)

  • Add testing a connection via Airflow CLI (#29892)

  • Support deleting the local log files when using remote logging (#29772)

  • Blocklist to disable specific metric tags or metric names (#29881)

  • Add a new graph inside of the grid view (#29413)

  • Add database check_migrations config (#29714)

  • add output format arg for cli.dags.trigger (#29224)

  • Make json and yaml available in templates (#28930)

  • Enable tagged metric names for existing Statsd metric publishing events | influxdb-statsd support (#29093)

  • Add arg –yes to db export-archived command. (#29485)

  • Make the policy functions pluggable (#28558)

  • Add airflow db drop-archived command (#29309)

  • Enable individual trigger logging (#27758)

  • Implement new filtering options in graph view (#29226)

  • Add triggers for ExternalTask (#29313)

  • Add command to export purged records to CSV files (#29058)

  • Add FileTrigger (#29265)

  • Emit DataDog statsd metrics with metadata tags (#28961)

  • Add some statsd metrics for dataset (#28907)

  • Add –overwrite option to connections import CLI command (#28738)

  • Add general-purpose “notifier” concept to DAGs (#28569)

  • Add a new conf to wait past_deps before skipping a task (#27710)

  • Add Flink on K8s Operator (#28512)

  • Allow Users to disable SwaggerUI via configuration (#28354)

  • Show mapped task groups in graph (#28392)

  • Log FileTaskHandler to work with KubernetesExecutor’s multi_namespace_mode (#28436)

  • Add a new config for adapting masked secrets to make it easier to prevent secret leakage in logs (#28239)

  • List specific config section and its values using the cli (#28334)

  • KubernetesExecutor multi_namespace_mode can use namespace list to avoid requiring cluster role (#28047)

  • Automatically save and allow restore of recent DAG run configs (#27805)

  • Added exclude_microseconds to cli (#27640)


  • Rename most pod_id usage to pod_name in KubernetesExecutor (#29147)

  • Update the error message for invalid use of poke-only sensors (#30821)

  • Update log level in scheduler critical section edge case (#30694)

  • AIP-51 Removing Executor Coupling from Core Airflow (AIP-51)

  • Add multiple exit code handling in skip logic for BashOperator (#30739)

  • Updated app to support configuring the caching hash method for FIPS v2 (#30675)

  • Preload airflow imports before dag parsing to save time (#30495)

  • Improve task & run actions UX in grid view (#30373)

  • Speed up TaskGroups with caching property of group_id (#30284)

  • Use the engine provided in the session (#29804)

  • Type related import optimization for Executors (#30361)

  • Add more type hints to the code base (#30503)

  • Always use self.appbuilder.get_session in security managers (#30233)

  • Update SQLAlchemy select() to new style (#30515)

  • Refactor out xcom constants from models (#30180)

  • Add exception class name to DAG-parsing error message (#30105)

  • Rename statsd_allow_list and statsd_block_list to metrics_*_list (#30174)

  • Improve serialization of tuples and sets (#29019)

  • Make cleanup method in trigger an async one (#30152)

  • Lazy load serialization modules (#30094)

  • SLA callbacks no longer add files to the dag_processing manager queue (#30076)

  • Add task.trigger rule to grid_data (#30130)

  • Speed up log template sync by avoiding ORM (#30119)

  • Separate into two modules (#29962)

  • Explicit skipped states list for ExternalTaskSensor (#29933)

  • Add task state hover highlighting to new graph (#30100)

  • Store grid tabs in url params (#29904)

  • Use custom Connexion resolver to load lazily (#29992)

  • Delay Kubernetes import in secret masker (#29993)

  • Delay ConnectionModelView init until it’s accessed (#29946)

  • Scheduler, make stale DAG deactivation threshold configurable instead of using dag processing timeout (#29446)

  • Improve grid view height calculations (#29563)

  • Avoid importing executor during conf validation (#29569)

  • Make permissions for FileTaskHandler group-writeable and configurable (#29506)

  • Add colors in help outputs of Airflow CLI commands #28789 (#29116)

  • Add a param for get_dags endpoint to list only unpaused dags (#28713)

  • Expose updated_at filter for dag run and task instance endpoints (#28636)

  • Increase length of user identifier columns (#29061)

  • Update gantt chart UI to display queued state of tasks (#28686)

  • Add index on log.dttm (#28944)

  • Display only the running configuration in configurations view (#28892)

  • Cap dropdown menu size dynamically (#28736)

  • Added JSON linter to connection edit / add UI for field extra. On connection edit screen, existing extra data will be displayed indented (#28583)

  • Use labels instead of pod name for pod log read in k8s exec (#28546)

  • Use time not tries for queued & running re-checks. (#28586)

  • CustomTTYColoredFormatter should inherit TimezoneAware formatter (#28439)

  • Improve past depends handling in Airflow CLI command (#28113)

  • Support using a list of callbacks in on_*_callback/sla_miss_callbacks (#28469)

  • Better table name validation for db clean (#28246)

  • Use object instead of array in config.yml for config template (#28417)

  • Add markdown rendering for task notes. (#28245)

  • Show mapped task groups in grid view (#28208)

  • Add renamed and previous_name in config sections (#28324)

  • Speed up most Users/Role CLI commands (#28259)

  • Speed up Airflow role list command (#28244)

  • Refactor serialization (#28067, #30819, #30823)

  • Allow longer pod names for k8s executor / KPO (#27736)

  • Updates health check endpoint to include triggerer status (#27755)

Bug Fixes

  • Fix static_folder for cli app (#30952)

  • Initialize plugins for cli appbuilder (#30934)

  • Fix dag file processor heartbeat to run only if necessary (#30899)

  • Fix KubernetesExecutor sending state to scheduler (#30872)

  • Count mapped upstream only if all are finished (#30641)

  • ExternalTaskSensor: add external_task_group_id to template_fields (#30401)

  • Improve url detection for task instance details (#30779)

  • Use material icons for dag import error banner (#30771)

  • Fix misc grid/graph view UI bugs (#30752)

  • Add a collapse grid button (#30711)

  • Fix d3 dependencies (#30702)

  • Simplify logic to resolve tasks stuck in queued despite stalled_task_timeout (#30375)

  • When clearing task instances try to get associated DAGs from database (#29065)

  • Fix mapped tasks partial arguments when DAG default args are provided (#29913)

  • Deactivate DAGs deleted from within zip files (#30608)

  • Recover from too old resource version exception by retrieving the latest resource_version (#30425)

  • Fix possible race condition when refreshing DAGs (#30392)

  • Use custom validator for OpenAPI request body (#30596)

  • Fix TriggerDagRunOperator with deferrable parameter (#30406)

  • Speed up dag runs deletion (#30330)

  • Do not use template literals to construct html elements (#30447)

  • Fix deprecation warning in example_sensor_decorator DAG (#30513)

  • Avoid logging sensitive information in triggerer job log (#30110)

  • Add a new parameter for base sensor to catch the exceptions in poke method (#30293)

  • Fix dag run conf encoding with non-JSON serializable values (#28777)

  • Added fixes for Airflow to be usable on Windows Dask-Workers (#30249)

  • Force DAG last modified time to UTC (#30243)

  • Fix EmptySkipOperator in example dag (#30269)

  • Make the webserver startup respect update_fab_perms (#30246)

  • Ignore error when changing log folder permissions (#30123)

  • Disable ordering DagRuns by note (#30043)

  • Fix reading logs from finished KubernetesExecutor worker pod (#28817)

  • Mask out non-access bits when comparing file modes (#29886)

  • Remove Run task action from UI (#29706)

  • Fix log tailing issues with legacy log view (#29496)

  • Fixes to how DebugExecutor handles sensors (#28528)

  • Ensure that pod_mutation_hook is called before logging the pod name (#28534)

  • Handle OverflowError on exponential backoff in next_run_calculation (#28172)


  • Make eager upgrade additional dependencies optional (#30811)

  • Upgrade to pip 23.1.1 (#30808)

  • Remove protobuf limitation from eager upgrade (#30182)

  • Remove protobuf limitation from eager upgrade (#30182)

  • Deprecate skip_exit_code in BashOperator (#30734)

  • Remove gauge scheduler.tasks.running (#30374)

  • Bump json5 to 1.0.2 and eslint-plugin-import to 2.27.5 in /airflow/www (#30568)

  • Add tests to PythonOperator (#30362)

  • Add asgiref as a core dependency (#30527)

  • Discovery safe mode toggle comment clarification (#30459)

  • Upgrade moment-timezone package to fix Tehran tz (#30455)

  • Bump loader-utils from 2.0.0 to 2.0.4 in /airflow/www (#30319)

  • Bump babel-loader from 8.1.0 to 9.1.0 in /airflow/www (#30316)

  • DagBag: Use dag.fileloc instead of dag.full_filepath in exception message (#30610)

  • Change log level of serialization information (#30239)

  • Minor DagRun helper method cleanup (#30092)

  • Improve type hinting in (#30024)

  • Limit importlib-metadata backport to < 5.0.0 (#29924)

  • Align cncf provider file names with AIP-21 (#29905)

  • Upgrade FAB to 4.3.0 (#29766)

  • Clear ExecutorLoader cache in tests (#29849)

  • Lazy load Task Instance logs in UI (#29827)

  • added warning log for max page limit exceeding api calls (#29788)

  • Aggressively cache entry points in process (#29625)

  • Don’t use importlib.metadata to get Version for speed (#29723)

  • Upgrade Mypy to 1.0 (#29468)

  • Rename db export-cleaned to db export-archived (#29450)

  • listener: simplify API by replacing SQLAlchemy event-listening by direct calls (#29289)

  • No multi-line log entry for bash env vars (#28881)

  • Switch to ruff for faster static checks (#28893)

  • Remove horizontal lines in TI logs (#28876)

  • Make allowed_deserialization_classes more intuitive (#28829)

  • Propagate logs to stdout when in k8s executor pod (#28440, #30860)

  • Fix code readability, add docstrings to json_client (#28619)

  • AIP-51 - Misc. Compatibility Checks (#28375)

  • Fix is_local for LocalKubernetesExecutor (#28288)

  • Move Hive macros to the provider (#28538)

  • Rerun flaky PinotDB integration test (#28562)

  • Add pre-commit hook to check session default value (#28007)

  • Refactor get_mapped_group_summaries for web UI (#28374)

  • Add support for k8s 1.26 (#28320)

  • Replace freezegun with time-machine (#28193)

  • Completed D400 for airflow/kubernetes/* (#28212)

  • Completed D400 for multiple folders (#27969)

  • Drop k8s 1.21 and 1.22 support (#28168)

  • Remove unused task_queue attr from k8s scheduler class (#28049)

  • Completed D400 for multiple folders (#27767, #27768)

Doc only changes

  • Add instructions on how to avoid accidental airflow upgrade/downgrade (#30813)

  • Add explicit information about how to write task logs (#30732)

  • Better explanation on how to log from tasks (#30746)

  • Use correct import path for Dataset (#30617)

  • Create audit_logs.rst (#30405)

  • Adding taskflow API example for sensors (#30344)

  • Add clarification about timezone aware dags (#30467)

  • Clarity params documentation (#30345)

  • Fix unit for task duration metric (#30273)

  • Update dag-run.rst for dead links of cli commands (#30254)

  • Add Write efficient Python code section to Reducing DAG complexity (#30158)

  • Allow to specify which connection, variable or config are being looked up in the backend using *_lookup_pattern parameters (#29580)

  • Add Documentation for notification feature extension (#29191)

  • Clarify that executor interface is public but instances are not (#29200)

  • Add Public Interface description to Airflow documentation (#28300)

  • Add documentation for task group mapping (#28001)

  • Some fixes to metrics doc (#30290)

Airflow 2.5.3 (2023-04-01)

Significant Changes

No significant changes.

Bug Fixes

  • Fix DagProcessorJob integration for standalone dag-processor (#30278)

  • Fix proper termination of gunicorn when it hangs (#30188)

  • Fix XCom.get_one exactly one exception text (#30183)

  • Correct the VARCHAR size to 250. (#30178)

  • Revert fix for on_failure_callback when task receives a SIGTERM (#30165)

  • Move read only property to DagState to fix generated docs (#30149)

  • Ensure that dag.partial_subset doesn’t mutate task group properties (#30129)

  • Fix inconsistent returned value of airflow dags next-execution cli command (#30117)

  • Fix www/utils.dag_run_link redirection (#30098)

  • Fix TriggerRuleDep when the mapped tasks count is 0 (#30084)

  • Dag processor manager, add retry_db_transaction to _fetch_callbacks (#30079)

  • Fix db clean command for mysql db (#29999)

  • Avoid considering EmptyOperator in mini scheduler (#29979)

  • Fix some long known Graph View UI problems (#29971, #30355, #30360)

  • Fix dag docs toggle icon initial angle (#29970)

  • Fix tags selection in DAGs UI (#29944)

  • Including airflow/example_dags/sql/sample.sql in (#29883)

  • Fixing broken filter in /taskinstance/list view (#29850)

  • Allow generic param dicts (#29782)

  • Fix update_mask in patch variable route (#29711)

  • Strip markup from app_name if instance_name_has_markup = True (#28894)


  • Revert “Also limit importlib on Python 3.9 (#30069)” (#30209)

  • Add custom_operator_name to @task.sensor tasks (#30131)

  • Bump webpack from 5.73.0 to 5.76.0 in /airflow/www (#30112)

  • Formatted config (#30103)

  • Remove upper bound limit of astroid (#30033)

  • Remove accidentally merged vendor daemon patch code (#29895)

  • Fix warning in airflow tasks test command regarding absence of data_interval (#27106)

Doc only changes

  • Adding more information regarding top level code (#30040)

  • Update workday example (#30026)

  • Fix some typos in the DAGs docs (#30015)

  • Update set-up-database.rst (#29991)

  • Fix some typos on the kubernetes documentation (#29936)

  • Fix some punctuation and grammar (#29342)

Airflow 2.5.2 (2023-03-15)

Significant Changes

The date-time fields passed as API parameters or Params should be RFC3339-compliant (#29395)

In case of API calls, it was possible that “+” passed as part of the date-time fields were not URL-encoded, and such date-time fields could pass validation. Such date-time parameters should now be URL-encoded (as %2B).

In case of parameters, we still allow IS8601-compliant date-time (so for example it is possible that ‘ ‘ was used instead of T separating date from time and no timezone was specified) but we raise deprecation warning.

Default for [webserver] expose_hostname changed to False (#29547)

The default for [webserver] expose_hostname has been set to False, instead of True. This means administrators must opt-in to expose webserver hostnames to end users.

Bug Fixes

  • Fix validation of date-time field in API and Parameter schemas (#29395)

  • Fix grid logs for large logs (#29390)

  • Fix on_failure_callback when task receives a SIGTERM (#29743)

  • Update min version of python-daemon to fix containerd file limits (#29916)

  • POST /dagRuns API should 404 if dag not active (#29860)

  • DAG list sorting lost when switching page (#29756)

  • Fix Scheduler crash when clear a previous run of a normal task that is now a mapped task (#29645)

  • Convert moment with timezone to UTC instead of raising an exception (#29606)

  • Fix clear dag run openapi spec responses by adding additional return type (#29600)

  • Don’t display empty rendered attrs in Task Instance Details page (#29545)

  • Remove section check from get-value command (#29541)

  • Do not show version/node in UI traceback for unauthenticated user (#29501)

  • Make prev_logical_date variable offset-aware (#29454)

  • Fix nested fields rendering in mapped operators (#29451)

  • Datasets, next_run_datasets, remove unnecessary timestamp filter (#29441)

  • Edgemodifier refactoring w/ labels in TaskGroup edge case (#29410)

  • Fix Rest API update user output (#29409)

  • Ensure Serialized DAG is deleted (#29407)

  • Persist DAG and task doc values in TaskFlow API if explicitly set (#29399)

  • Redirect to the origin page with all the params (#29212)

  • Fixing Task Duration view in case of manual DAG runs only (#22015) (#29195)

  • Remove poke method to fall back to parent implementation (#29146)

  • PR: Introduced fix to run tasks on Windows systems (#29107)

  • Fix warning in migrations about old config. (#29092)

  • Emit dagrun failed duration when timeout (#29076)

  • Handling error on cluster policy itself (#29056)

  • Fix kerberos authentication for the REST API. (#29054)

  • Fix leak sensitive field via V1EnvVar on exception (#29016)

  • Sanitize url_for arguments before they are passed (#29039)

  • Fix dag run trigger with a note. (#29228)

  • Write action log to DB when DAG run is triggered via API (#28998)

  • Resolve all variables in pickled XCom iterator (#28982)

  • Allow URI without authority and host blocks in airflow connections add (#28922)

  • Be more selective when adopting pods with KubernetesExecutor (#28899)

  • KubenetesExecutor sends state even when successful (#28871)

  • Annotate KubernetesExecutor pods that we don’t delete (#28844)

  • Throttle streaming log reads (#28818)

  • Introduce dag processor job (#28799)

  • Fix #28391 manual task trigger from UI fails for k8s executor (#28394)

  • Logging poke info when external dag is not none and task_id and task_ids are none (#28097)

  • Fix inconsistencies in checking edit permissions for a DAG (#20346)


  • Add a check for not templateable fields (#29821)

  • Removed continue for not in (#29791)

  • Move extra links position in grid view (#29703)

  • Bump undici from 5.9.1 to 5.19.1 (#29583)

  • Change expose_hostname default to false (#29547)

  • Change permissions of config/password files created by airflow (#29495)

  • Use newer setuptools v67.2.0 (#29465)

  • Increase max height for grid view elements (#29367)

  • Clarify description of worker control config (#29247)

  • Bump ua-parser-js from 0.7.31 to 0.7.33 in /airflow/www (#29172)

  • Remove upper bound limitation for pytest (#29086)

  • Check for run_id url param when linking to graph/gantt views (#29066)

  • Clarify graph view dynamic task labels (#29042)

  • Fixing import error for dataset (#29007)

  • Update how PythonSensor returns values from python_callable (#28932)

  • Add dep context description for better log message (#28875)

  • Bump swagger-ui-dist from 3.52.0 to 4.1.3 in /airflow/www (#28824)

  • Limit importlib-metadata backport to < 5.0.0 (#29924, #30069)

Doc only changes

  • Update pipeline.rst - Fix query in merge_data() task (#29158)

  • Correct argument name of Workday timetable in timetable.rst (#29896)

  • Update ref anchor for env var link in Connection how-to doc (#29816)

  • Better description for limit in api (#29773)

  • Description of dag_processing.last_duration (#29740)

  • Update docs re: template_fields typing and subclasses (#29725)

  • Fix formatting of Dataset inlet/outlet note in TaskFlow concepts (#29678)

  • Specific use-case: adding packages via requirements.txt in compose (#29598)

  • Detect is ‘docker-compose’ existing (#29544)

  • Add Landing Times entry to UI docs (#29511)

  • Improve health checks in example docker-compose and clarify usage (#29408)

  • Remove notes param from TriggerDagRunOperator docstring (#29298)

  • Use schedule param rather than timetable in Timetables docs (#29255)

  • Add trigger process to Airflow Docker docs (#29203)

  • Update set-up-database.rst (#29104)

  • Several improvements to the Params doc (#29062)

  • Email Config docs more explicit env var examples (#28845)

  • Listener plugin example added (#27905)

Airflow 2.5.1 (2023-01-20)

Significant Changes

Trigger gevent monkeypatching via environment variable (#28283)

If you are using gevent for your webserver deployment and used local settings to monkeypatch gevent, you might want to replace local settings patching with an _AIRFLOW_PATCH_GEVENT environment variable set to 1 in your webserver. This ensures gevent patching is done as early as possible.

Bug Fixes

  • Fix masking of non-sensitive environment variables (#28802)

  • Remove swagger-ui extra from connexion and install swagger-ui-dist via npm package (#28788)

  • Fix UIAlert should_show when AUTH_ROLE_PUBLIC set (#28781)

  • Only patch single label when adopting pod (#28776)

  • Update CSRF token to expire with session (#28730)

  • Fix “airflow tasks render” cli command for mapped task instances (#28698)

  • Allow XComArgs for external_task_ids of ExternalTaskSensor (#28692)

  • Row-lock TIs to be removed during mapped task expansion (#28689)

  • Handle ConnectionReset exception in Executor cleanup (#28685)

  • Fix description of output redirection for access_log for gunicorn (#28672)

  • Add back join to zombie query that was dropped in #28198 (#28544)

  • Fix calendar view for CronTriggerTimeTable dags (#28411)

  • After running the DAG the employees table is empty. (#28353)

  • Fix DetachedInstanceError when finding zombies in Dag Parsing process (#28198)

  • Nest header blocks in divs to fix dagid copy nit on dag.html (#28643)

  • Fix UI caret direction (#28624)

  • Guard not-yet-expanded ti in trigger rule dep (#28592)

  • Move TI setNote endpoints under TaskInstance in OpenAPI (#28566)

  • Consider previous run in CronTriggerTimetable (#28532)

  • Ensure correct log dir in file task handler (#28477)

  • Fix bad pods pickled in executor_config (#28454)

  • Add ensure_ascii=False in trigger dag run API (#28451)

  • Add setters to MappedOperator on_*_callbacks (#28313)

  • Fix ti._try_number for deferred and up_for_reschedule tasks (#26993)

  • separate callModal from dag.js (#28410)

  • A manual run can’t look like a scheduled one (#28397)

  • Dont show task/run durations when there is no start_date (#28395)

  • Maintain manual scroll position in task logs (#28386)

  • Correctly select a mapped task’s “previous” task (#28379)

  • Trigger gevent monkeypatching via environment variable (#28283)

  • Fix db clean warnings (#28243)

  • Make arguments ‘offset’ and ‘length’ not required (#28234)

  • Make live logs reading work for “other” k8s executors (#28213)

  • Add custom pickling hooks to LazyXComAccess (#28191)

  • fix next run datasets error (#28165)

  • Ensure that warnings from @dag decorator are reported in dag file (#28153)

  • Do not warn when airflow dags tests command is used (#28138)

  • Ensure the dagbag_size metric decreases when files are deleted (#28135)

  • Improve run/task grid view actions (#28130)

  • Make BaseJob.most_recent_job favor “running” jobs (#28119)

  • Don’t emit FutureWarning when code not calling old key (#28109)

  • Add airflow.api.auth.backend.session to backend sessions in compose (#28094)

  • Resolve false warning about calling conf.get on moved item (#28075)

  • Return list of tasks that will be changed (#28066)

  • Handle bad zip files nicely when parsing DAGs. (#28011)

  • Prevent double loading of providers from local paths (#27988)

  • Fix deadlock when chaining multiple empty mapped tasks (#27964)

  • fix: current_state method on TaskInstance doesn’t filter by map_index (#27898)

  • Don’t log CLI actions if db not initialized (#27851)

  • Make sure we can get out of a faulty scheduler state (#27834)

  • dagrun, next_dagruns_to_examine, add MySQL index hint (#27821)

  • Handle DAG disappearing mid-flight when dag verification happens (#27720)

  • fix: continue checking sla (#26968)

  • Allow generation of connection URI to work when no conn type (#26765)


  • Remove limit for dnspython after eventlet got fixed (#29004)

  • Limit dnspython to < 2.3.0 until eventlet incompatibility is solved (#28962)

  • Add automated version replacement in example dag indexes (#28090)

  • Cleanup and do housekeeping with plugin examples (#28537)

  • Limit SQLAlchemy to below 2.0 (#28725)

  • Bump json5 from 1.0.1 to 1.0.2 in /airflow/www (#28715)

  • Fix some docs on using sensors with taskflow (#28708)

  • Change Architecture and OperatingSystem classes into Enums (#28627)

  • Add doc-strings and small improvement to email util (#28634)

  • Fix Connection.get_extra type (#28594)

  • navbar, cap dropdown size, and add scroll bar (#28561)

  • Emit warnings for conf.get* from the right source location (#28543)

  • Move MyPY plugins of ours to dev folder (#28498)

  • Add retry to purge_inactive_dag_warnings (#28481)

  • Re-enable Plyvel on ARM as it now builds cleanly (#28443)

  • Add SIGUSR2 handler for LocalTaskJob and workers to aid debugging (#28309)

  • Convert test_task_command to Pytest and unquarantine tests in it (#28247)

  • Make invalid characters exception more readable (#28181)

  • Bump decode-uri-component from 0.2.0 to 0.2.2 in /airflow/www (#28080)

  • Use asserts instead of exceptions for executor not started (#28019)

  • Simplify dataset subgraph logic (#27987)

  • Order TIs by map_index (#27904)

  • Additional info about Segmentation Fault in LocalTaskJob (#27381)

Doc only changes

  • Mention mapped operator in cluster policy doc (#28885)

  • Slightly improve description of Dynamic DAG generation preamble (#28650)

  • Restructure Docs (#27235)

  • Update scheduler docs about low priority tasks (#28831)

  • Clarify that versioned constraints are fixed at release time (#28762)

  • Clarify about docker compose (#28729)

  • Adding an example dag for dynamic task mapping (#28325)

  • Use docker compose v2 command (#28605)

  • Add AIRFLOW_PROJ_DIR to docker-compose example (#28517)

  • Remove outdated Optional Provider Feature outdated documentation (#28506)

  • Add documentation for [core] mp_start_method config (#27993)

  • Documentation for the LocalTaskJob return code counter (#27972)

  • Note which versions of Python are supported (#27798)

Airflow 2.5.0 (2022-12-02)

Significant Changes

airflow dags test no longer performs a backfill job (#26400)

In order to make airflow dags test more useful as a testing and debugging tool, we no longer run a backfill job and instead run a “local task runner”. Users can still backfill their DAGs using the airflow dags backfill command.

Airflow config section kubernetes renamed to kubernetes_executor (#26873)

KubernetesPodOperator no longer considers any core kubernetes config params, so this section now only applies to kubernetes executor. Renaming it reduces potential for confusion.

AirflowException is now thrown as soon as any dependent tasks of ExternalTaskSensor fails (#27190)

ExternalTaskSensor no longer hangs indefinitely when failed_states is set, an execute_date_fn is used, and some but not all of the dependent tasks fail. Instead, an AirflowException is thrown as soon as any of the dependent tasks fail. Any code handling this failure in addition to timeouts should move to caching the AirflowException BaseClass and not only the AirflowSensorTimeout subclass.

The Airflow config option scheduler.deactivate_stale_dags_interval has been renamed to scheduler.parsing_cleanup_interval (#27828).

The old option will continue to work but will issue deprecation warnings, and will be removed entirely in Airflow 3.

New Features

  • TaskRunner: notify of component start and finish (#27855)

  • Add DagRun state change to the Listener plugin system(#27113)

  • Metric for raw task return codes (#27155)

  • Add logic for XComArg to pull specific map indexes (#27771)

  • Clear TaskGroup (#26658, #28003)

  • Add critical section query duration metric (#27700)

  • Add: #23880 :: Audit log for AirflowModelViews(Variables/Connection) (#24079, #27994, #27923)

  • Add postgres 15 support (#27444)

  • Expand tasks in mapped group at run time (#27491)

  • reset commits, clean submodules (#27560)

  • scheduler_job, add metric for scheduler loop timer (#27605)

  • Allow datasets to be used in taskflow (#27540)

  • Add expanded_ti_count to ti context (#27680)

  • Add user comment to task instance and dag run (#26457, #27849, #27867)

  • Enable copying DagRun JSON to clipboard (#27639)

  • Implement extra controls for SLAs (#27557)

  • add dag parsed time in DAG view (#27573)

  • Add max_wait for exponential_backoff in BaseSensor (#27597)

  • Expand tasks in mapped group at parse time (#27158)

  • Add disable retry flag on backfill (#23829)

  • Adding sensor decorator (#22562)

  • Api endpoint update ti (#26165)

  • Filtering datasets by recent update events (#26942)

  • Support Is /not Null filter for value is None on webui (#26584)

  • Add search to datasets list (#26893)

  • Split out and handle ‘params’ in mapped operator (#26100)

  • Add authoring API for TaskGroup mapping (#26844)

  • Add one_done trigger rule (#26146)

  • Create a more efficient airflow dag test command that also has better local logging (#26400)

  • Support add/remove permissions to roles commands (#26338)

  • Auto tail file logs in Web UI (#26169)

  • Add triggerer info to task instance in API (#26249)

  • Flag to deserialize value on custom XCom backend (#26343)


  • Allow depth-first execution (#27827)

  • UI: Update offset height if data changes (#27865)

  • Improve TriggerRuleDep typing and readability (#27810)

  • Make views requiring session, keyword only args (#27790)

  • Optimize TI.xcom_pull() with explicit task_ids and map_indexes (#27699)

  • Allow hyphens in pod id used by k8s executor (#27737)

  • optimise task instances filtering (#27102)

  • Use context managers to simplify log serve management (#27756)

  • Fix formatting leftovers (#27750)

  • Improve task deadlock messaging (#27734)

  • Improve “sensor timeout” messaging (#27733)

  • Replace urlparse with urlsplit (#27389)

  • Align TaskGroup semantics to AbstractOperator (#27723)

  • Add new files to parsing queue on every loop of dag processing (#27060)

  • Make Kubernetes Executor & Scheduler resilient to error during PMH execution (#27611)

  • Separate dataset deps into individual graphs (#27356)

  • Use log.exception where more economical than log.error (#27517)

  • Move validation branch_task_ids into SkipMixin (#27434)

  • Coerce LazyXComAccess to list when pushed to XCom (#27251)

  • Update cluster-policies.rst docs (#27362)

  • Add warning if connection type already registered within the provider (#27520)

  • Activate debug logging in commands with –verbose option (#27447)

  • Add classic examples for Python Operators (#27403)

  • change .first() to .scalar() (#27323)

  • Improve reset_dag_run description (#26755)

  • Add examples and howtos about sensors (#27333)

  • Make grid view widths adjustable (#27273)

  • Sorting plugins custom menu links by category before name (#27152)

  • Simplify DagRun.verify_integrity (#26894)

  • Add mapped task group info to serialization (#27027)

  • Correct the JSON style used for Run config in Grid View (#27119)

  • No extra__conn_type__ prefix required for UI behaviors (#26995)

  • Improve dataset update blurb (#26878)

  • Rename kubernetes config section to kubernetes_executor (#26873)

  • decode params for dataset searches (#26941)

  • Get rid of the DAGRun details page & rely completely on Grid (#26837)

  • Fix scheduler crashloopbackoff when using hostname_callable (#24999)

  • Reduce log verbosity in KubernetesExecutor. (#26582)

  • Don’t iterate tis list twice for no reason (#26740)

  • Clearer code for PodGenerator.deserialize_model_file (#26641)

  • Don’t import kubernetes unless you have a V1Pod (#26496)

  • Add updated_at column to DagRun and Ti tables (#26252)

  • Move the deserialization of custom XCom Backend to 2.4.0 (#26392)

  • Avoid calculating all elements when one item is needed (#26377)

  • Add __future__.annotations automatically by isort (#26383)

  • Handle list when serializing expand_kwargs (#26369)

  • Apply PEP-563 (Postponed Evaluation of Annotations) to core airflow (#26290)

  • Add more weekday operator and sensor examples #26071 (#26098)

  • Align TaskGroup semantics to AbstractOperator (#27723)

Bug Fixes

  • Gracefully handle whole config sections being renamed (#28008)

  • Add allow list for imports during deserialization (#27887)

  • Soft delete datasets that are no longer referenced in DAG schedules or task outlets (#27828)

  • Redirect to home view when there are no valid tags in the URL (#25715)

  • Refresh next run datasets info in dags view (#27839)

  • Make MappedTaskGroup depend on its expand inputs (#27876)

  • Make DagRun state updates for paused DAGs faster (#27725)

  • Don’t explicitly set include_examples to False on task run command (#27813)

  • Fix menu border color (#27789)

  • Fix backfill queued task getting reset to scheduled state. (#23720)

  • Fix clearing child dag mapped tasks from parent dag (#27501)

  • Handle json encoding of V1Pod in task callback (#27609)

  • Fix ExternalTaskSensor can’t check zipped dag (#27056)

  • Avoid re-fetching DAG run in TriggerDagRunOperator (#27635)

  • Continue on exception when retrieving metadata (#27665)

  • External task sensor fail fix (#27190)

  • Add the default None when pop actions (#27537)

  • Display parameter values from serialized dag in trigger dag view. (#27482, #27944)

  • Move TriggerDagRun conf check to execute (#27035)

  • Resolve trigger assignment race condition (#27072)

  • Update google_analytics.html (#27226)

  • Fix some bug in web ui dags list page (auto-refresh & jump search null state) (#27141)

  • Fixed broken URL for docker-compose.yaml (#26721)

  • Fix xcom .zip bug (#26636)

  • Fix 404 taskInstance errors and split into two tables (#26575)

  • Fix browser warning of improper thread usage (#26551)

  • template rendering issue fix (#26390)

  • Clear autoregistered DAGs if there are any import errors (#26398)

  • Fix from airflow import version lazy import (#26239)

  • allow scroll in triggered dag runs modal (#27965)


  • Remove is_mapped attribute (#27881)

  • Simplify FAB table resetting (#27869)

  • Fix old-style typing in Base Sensor (#27871)

  • Switch (back) to late imports (#27730)

  • Completed D400 for multiple folders (#27748)

  • simplify notes accordion test (#27757)

  • completed D400 for airflow/callbacks/* airflow/cli/* (#27721)

  • Completed D400 for airflow/api_connexion/* directory (#27718)

  • Completed D400 for airflow/listener/* directory (#27731)

  • Completed D400 for airflow/lineage/* directory (#27732)

  • Update API & Python Client versions (#27642)

  • Completed D400 & D401 for airflow/api/* directory (#27716)

  • Completed D400 for multiple folders (#27722)

  • Bump minimatch from 3.0.4 to 3.0.8 in /airflow/www (#27688)

  • Bump loader-utils from 1.4.1 to 1.4.2 ``in ``/airflow/www (#27697)

  • Disable nested task mapping for now (#27681)

  • bump alembic minimum version (#27629)

  • remove unused code.html (#27585)

  • Enable python string normalization everywhere (#27588)

  • Upgrade dependencies in order to avoid backtracking (#27531)

  • Strengthen a bit and clarify importance of triaging issues (#27262)

  • Deduplicate type hints (#27508)

  • Add stub ‘yield’ to (#27416)

  • Remove upper-bound limit to dask (#27415)

  • Limit Dask to under 2022.10.1 (#27383)

  • Update old style typing (#26872)

  • Enable string normalization for docs (#27269)

  • Slightly faster up/downgrade tests (#26939)

  • Deprecate use of core get_kube_client in PodManager (#26848)

  • Add memray files to gitignore / dockerignore (#27001)

  • Bump sphinx and sphinx-autoapi (#26743)

  • Simplify RTIF.delete_old_records() (#26667)

  • migrate last react files to typescript (#26112)

  • Work around pyupgrade edge cases (#26384)

Doc only changes

  • Document dag_file_processor_timeouts metric as deprecated (#27067)

  • Drop support for PostgreSQL 10 (#27594)

  • Update index.rst (#27529)

  • Add note about pushing the lazy XCom proxy to XCom (#27250)

  • Fix BaseOperator link (#27441)

  • [docs] best-practices add use variable with template example. (#27316)

  • docs for custom view using plugin (#27244)

  • Update graph view and grid view on overview page (#26909)

  • Documentation fixes (#26819)

  • make consistency on markup title string level (#26696)

  • Add documentation to dag test function (#26713)

  • Fix broken URL for docker-compose.yaml (#26726)

  • Add a note against use of top level code in timetable (#26649)

  • Fix example_datasets dag names (#26495)

  • Update docs: zip-like effect is now possible in task mapping (#26435)

  • changing to task decorator in docs from classic operator use (#25711)

Airflow 2.4.3 (2022-11-14)

Significant Changes

Make RotatingFilehandler used in DagProcessor non-caching (#27223)

In case you want to decrease cache memory when CONFIG_PROCESSOR_MANAGER_LOGGER=True, and you have your local settings created before, you can update processor_manager_handler to use airflow.utils.log.non_caching_file_handler.NonCachingRotatingFileHandler handler instead of logging.RotatingFileHandler.

Bug Fixes

  • Fix double logging with some task logging handler (#27591)

  • Replace FAB url filtering function with Airflow’s (#27576)

  • Fix mini scheduler expansion of mapped task (#27506)

  • SLAMiss is nullable and not always given back when pulling task instances (#27423)

  • Fix behavior of _ when searching for DAGs (#27448)

  • Fix getting the dag/task ids from BaseExecutor (#27550)

  • Fix SQLAlchemy primary key black-out error on DDRQ (#27538)

  • Fix IntegrityError during webserver startup (#27297)

  • Add case insensitive constraint to username (#27266)

  • Fix python external template keys (#27256)

  • Reduce extraneous task log requests (#27233)

  • Make RotatingFilehandler used in DagProcessor non-caching (#27223)

  • Listener: Set task on SQLAlchemy TaskInstance object (#27167)

  • Fix dags list page auto-refresh & jump search null state (#27141)

  • Set executor.job_id to for backfills (#27020)


  • Bump loader-utils from 1.4.0 to 1.4.1 in /airflow/www (#27552)

  • Reduce log level for k8s TCP_KEEPALIVE etc warnings (#26981)

Doc only changes

  • Use correct executable in docker compose docs (#27529)

  • Fix wording in DAG Runs description (#27470)

  • Document that KubernetesExecutor overwrites container args (#27450)

  • Fix BaseOperator links (#27441)

  • Correct timer units to seconds from milliseconds. (#27360)

  • Add missed import in the Trigger Rules example (#27309)

  • Update SLA wording to reflect it is relative to Dag Run start. (#27111)

  • Add kerberos environment variables to the docs (#27028)

Airflow 2.4.2 (2022-10-23)

Significant Changes

Default for [webserver] expose_stacktrace changed to False (#27059)

The default for [webserver] expose_stacktrace has been set to False, instead of True. This means administrators must opt-in to expose tracebacks to end users.

Bug Fixes

  • Make tracebacks opt-in (#27059)

  • Add missing AUTOINC/SERIAL for FAB tables (#26885)

  • Add separate error handler for 405(Method not allowed) errors (#26880)

  • Don’t re-patch pods that are already controlled by current worker (#26778)

  • Handle mapped tasks in task duration chart (#26722)

  • Fix task duration cumulative chart (#26717)

  • Avoid 500 on dag redirect (#27064)

  • Filter dataset dependency data on webserver (#27046)

  • Remove double collection of dags in airflow dags reserialize (#27030)

  • Fix auto refresh for graph view (#26926)

  • Don’t overwrite connection extra with invalid json (#27142)

  • Fix next run dataset modal links (#26897)

  • Change dag audit log sort by date from asc to desc (#26895)

  • Bump min version of jinja2 (#26866)

  • Add missing colors to state_color_mapping jinja global (#26822)

  • Fix running debuggers inside airflow tasks test (#26806)

  • Fix warning when using xcomarg dependencies (#26801)

  • demote Removed state in priority for displaying task summaries (#26789)

  • Ensure the log messages from operators during parsing go somewhere (#26779)

  • Add restarting state to TaskState Enum in REST API (#26776)

  • Allow retrieving error message from data.detail (#26762)

  • Simplify origin string cleaning (#27143)

  • Remove DAG parsing from StandardTaskRunner (#26750)

  • Fix non-hidden cumulative chart on duration view (#26716)

  • Remove TaskFail duplicates check (#26714)

  • Fix airflow tasks run –local when dags_folder differs from that of processor (#26509)

  • Fix yarn warning from d3-color (#27139)

  • Fix version for a couple configurations (#26491)

  • Revert “No grid auto-refresh for backfill dag runs (#25042)” (#26463)

  • Retry on Airflow Schedule DAG Run DB Deadlock (#26347)


  • Clean-ups around task-mapping code (#26879)

  • Move user-facing string to template (#26815)

  • add icon legend to datasets graph (#26781)

  • Bump sphinx and sphinx-autoapi (#26743)

  • Simplify RTIF.delete_old_records() (#26667)

  • Bump FAB to 4.1.4 (#26393)

Doc only changes

  • Fixed triple quotes in task group example (#26829)

  • Documentation fixes (#26819)

  • make consistency on markup title string level (#26696)

  • Add a note against use of top level code in timetable (#26649)

  • Fix broken URL for docker-compose.yaml (#26726)

Airflow 2.4.1 (2022-09-30)

Significant Changes

No significant changes.

Bug Fixes

  • When rendering template, unmap task in context (#26702)

  • Fix scroll overflow for ConfirmDialog (#26681)

  • Resolve deprecation warning re Table.exists() (#26616)

  • Fix XComArg zip bug (#26636)

  • Use COALESCE when ordering runs to handle NULL (#26626)

  • Check user is active (#26635)

  • No missing user warning for public admin (#26611)

  • Allow MapXComArg to resolve after serialization (#26591)

  • Resolve warning about DISTINCT ON query on dags view (#26608)

  • Log warning when secret backend kwargs is invalid (#26580)

  • Fix grid view log try numbers (#26556)

  • Template rendering issue in passing templates_dict to task decorator (#26390)

  • Fix Deferrable stuck as scheduled during backfill (#26205)

  • Suppress SQLALCHEMY_TRACK_MODIFICATIONS warning in db init (#26617)

  • Correctly set json_provider_class on Flask app so it uses our encoder (#26554)

  • Fix WSGI root app (#26549)

  • Fix deadlock when mapped task with removed upstream is rerun (#26518)

  • ExecutorConfigType should be cacheable (#26498)

  • Fix proper joining of the path for logs retrieved from celery workers (#26493)

  • DAG Deps extends base_template (#26439)

  • Don’t update backfill run from the scheduler (#26342)

Doc only changes

  • Clarify owner links document (#26515)

  • Fix invalid RST in dataset concepts doc (#26434)

  • Document the non-sensitive-only option for expose_config (#26507)

  • Fix example_datasets dag names (#26495)

  • Zip-like effect is now possible in task mapping (#26435)

  • Use task decorator in docs instead of classic operators (#25711)

Airflow 2.4.0 (2022-09-19)

Significant Changes

Data-aware Scheduling and Dataset concept added to Airflow

New to this release of Airflow is the concept of Datasets to Airflow, and with it a new way of scheduling dags: data-aware scheduling.

This allows DAG runs to be automatically created as a result of a task “producing” a dataset. In some ways this can be thought of as the inverse of TriggerDagRunOperator, where instead of the producing DAG controlling which DAGs get created, the consuming DAGs can “listen” for changes.

A dataset is identified by a URI:

from airflow import Dataset

# The URI doesn't have to be absolute
dataset = Dataset(uri="my-dataset")
# Or you can use a scheme to show where it lives.
dataset2 = Dataset(uri="s3://bucket/prefix")

To create a DAG that runs whenever a Dataset is updated use the new schedule parameter (see below) and pass a list of 1 or more Datasets:

with DAG(dag_id='dataset-consumer', schedule=[dataset]):

And to mark a task as producing a dataset pass the dataset(s) to the outlets attribute:

def my_task():

# Or for classic operators
BashOperator(task_id="update-ds", bash_command=..., outlets=[dataset])

If you have the producer and consumer in different files you do not need to use the same Dataset object, two Dataset()s created with the same URI are equal.

Datasets represent the abstract concept of a dataset, and (for now) do not have any direct read or write capability - in this release we are adding the foundational feature that we will build upon.

For more info on Datasets please see Data-aware scheduling.

Expanded dynamic task mapping support

Dynamic task mapping now includes support for expand_kwargs, zip and map.

For more info on dynamic task mapping please see Dynamic Task Mapping.

DAGS used in a context manager no longer need to be assigned to a module variable (#23592)

Previously you had to assign a DAG to a module-level variable in order for Airflow to pick it up. For example this

with DAG(dag_id="example") as dag:

def dag_maker():

dag2 = dag_maker()

can become

with DAG(dag_id="example"):

def dag_maker():


If you want to disable the behaviour for any reason then set auto_register=False on the dag:

# This dag will not be picked up by Airflow as it's not assigned to a variable
with DAG(dag_id="example", auto_register=False):

Deprecation of schedule_interval and timetable arguments (#25410)

We added new DAG argument schedule that can accept a cron expression, timedelta object, timetable object, or list of dataset objects. Arguments schedule_interval and timetable are deprecated.

If you previously used the @daily cron preset, your DAG may have looked like this:

with DAG(
    start_date=datetime(2021, 1, 1),

Going forward, you should use the schedule argument instead:

with DAG(
    start_date=datetime(2021, 1, 1),

The same is true if you used a custom timetable. Previously you would have used the timetable argument:

with DAG(
    start_date=datetime(2021, 1, 1),
    timetable=EventsTimetable(event_dates=[pendulum.datetime(2022, 4, 5)]),

Now you should use the schedule argument:

with DAG(
    start_date=datetime(2021, 1, 1),
    schedule=EventsTimetable(event_dates=[pendulum.datetime(2022, 4, 5)]),

Removal of experimental Smart Sensors (#25507)

Smart Sensors were added in 2.0 and deprecated in favor of Deferrable operators in 2.2, and have now been removed.

airflow.contrib packages and deprecated modules are dynamically generated (#26153, #26179, #26167)

The airflow.contrib packages and deprecated modules from Airflow 1.10 in airflow.hooks, airflow.operators, airflow.sensors packages are now dynamically generated modules and while users can continue using the deprecated contrib classes, they are no longer visible for static code check tools and will be reported as missing. It is recommended for the users to move to the non-deprecated classes.

DBApiHook and SQLSensor have moved (#24836)

DBApiHook and SQLSensor have been moved to the apache-airflow-providers-common-sql provider.

DAG runs sorting logic changed in grid view (#25090)

The ordering of DAG runs in the grid view has been changed to be more “natural”. The new logic generally orders by data interval, but a custom ordering can be applied by setting the DAG to use a custom timetable.

New Features

  • Add Data-aware Scheduling (AIP-48)

  • Add @task.short_circuit TaskFlow decorator (#25752)

  • Make execution_date_or_run_id optional in tasks test command (#26114)

  • Automatically register DAGs that are used in a context manager (#23592, #26398)

  • Add option of sending DAG parser logs to stdout. (#25754)

  • Support multiple DagProcessors parsing files from different locations. (#25935)

  • Implement ExternalPythonOperator (#25780)

  • Make execution_date optional for command dags test (#26111)

  • Implement expand_kwargs() against a literal list (#25925)

  • Add trigger rule tooltip (#26043)

  • Add conf parameter to CLI for airflow dags test (#25900)

  • Include scheduled slots in pools view (#26006)

  • Add output property to MappedOperator (#25604)

  • Add roles delete command to cli (#25854)

  • Add Airflow specific warning classes (#25799)

  • Add support for TaskGroup in ExternalTaskSensor (#24902)

  • Add @task.kubernetes taskflow decorator (#25663)

  • Add a way to import Airflow without side-effects (#25832)

  • Let timetables control generated run_ids. (#25795)

  • Allow per-timetable ordering override in grid view (#25633)

  • Grid logs for mapped instances (#25610, #25621, #25611)

  • Consolidate to one schedule param (#25410)

  • DAG regex flag in backfill command (#23870)

  • Adding support for owner links in the Dags view UI (#25280)

  • Ability to clear a specific DAG Run’s task instances via REST API (#23516)

  • Possibility to document DAG with a separate markdown file (#25509)

  • Add parsing context to DAG Parsing (#25161)

  • Implement CronTriggerTimetable (#23662)

  • Add option to mask sensitive data in UI configuration page (#25346)

  • Create new databases from the ORM (#24156)

  • Implement*xcom_args) (#25176)

  • Introduce sla_miss metric (#23402)

  • Implement map() semantic (#25085)

  • Add override method to TaskGroupDecorator (#25160)

  • Implement expand_kwargs() (#24989)

  • Add parameter to turn off SQL query logging (#24570)

  • Add DagWarning model, and a check for missing pools (#23317)

  • Add Task Logs to Grid details panel (#24249)

  • Added small health check server and endpoint in scheduler(#23905)

  • Add built-in External Link for ExternalTaskMarker operator (#23964)

  • Add default task retry delay config (#23861)

  • Add clear DagRun endpoint. (#23451)

  • Add support for timezone as string in cron interval timetable (#23279)

  • Add auto-refresh to dags home page (#22900, #24770)


  • Add more weekday operator and sensor examples #26071 (#26098)

  • Add subdir parameter to dags reserialize command (#26170)

  • Update zombie message to be more descriptive (#26141)

  • Only send an SlaCallbackRequest if the DAG is scheduled (#26089)

  • Promote Operator.output more (#25617)

  • Upgrade API files to typescript (#25098)

  • Less hacky double-rendering prevention in mapped task (#25924)

  • Improve Audit log (#25856)

  • Remove mapped operator validation code (#25870)

  • More DAG(schedule=...) improvements (#25648)

  • Reduce operator_name dupe in serialized JSON (#25819)

  • Make grid view group/mapped summary UI more consistent (#25723)

  • Remove useless statement in task_group_to_grid (#25654)

  • Add optional data interval to CronTriggerTimetable (#25503)

  • Remove unused code in /grid endpoint (#25481)

  • Add and document description fields (#25370)

  • Improve Airflow logging for operator Jinja template processing (#25452)

  • Update core example DAGs to use @task.branch decorator (#25242)

  • Update DAG audit_log route (#25415)

  • Change stdout and stderr access mode to append in commands (#25253)

  • Remove getTasks from Grid view (#25359)

  • Improve taskflow type hints with ParamSpec (#25173)

  • Use tables in grid details panes (#25258)

  • Explicitly list @dag arguments (#25044)

  • More typing in SchedulerJob and TaskInstance (#24912)

  • Patch getfqdn with more resilient version (#24981)

  • Replace all NBSP characters by whitespaces (#24797)

  • Re-serialize all DAGs on airflow db upgrade (#24518)

  • Rework contract of try_adopt_task_instances method (#23188)

  • Make expand() error vague so it’s not misleading (#24018)

  • Add enum validation for [webserver]analytics_tool (#24032)

  • Add dttm searchable field in audit log (#23794)

  • Allow more parameters to be piped through via execute_in_subprocess (#23286)

  • Use func.count to count rows (#23657)

  • Remove stale serialized dags (#22917)

  • AIP45 Remove dag parsing in airflow run local (#21877)

  • Add support for queued state in DagRun update endpoint. (#23481)

  • Add fields to dagrun endpoint (#23440)

  • Use sql_alchemy_conn for celery result backend when result_backend is not set (#24496)

Bug Fixes

  • Have consistent types between the ORM and the migration files (#24044, #25869)

  • Disallow any dag tags longer than 100 char (#25196)

  • Add the dag_id to AirflowDagCycleException message (#26204)

  • Properly build URL to retrieve logs independently from system (#26337)

  • For worker log servers only bind to IPV6 when dual stack is available (#26222)

  • Fix TaskInstance.task not defined before handle_failure (#26040)

  • Undo secrets backend config caching (#26223)

  • Fix faulty executor config serialization logic (#26191)

  • Show DAGs and Datasets menu links based on role permission (#26183)

  • Allow setting TaskGroup tooltip via function docstring (#26028)

  • Fix RecursionError on graph view of a DAG with many tasks (#26175)

  • Fix backfill occasional deadlocking (#26161)

  • Fix DagRun.start_date not set during backfill with --reset-dagruns True (#26135)

  • Use label instead of id for dynamic task labels in graph (#26108)

  • Don’t fail DagRun when leaf mapped_task is SKIPPED (#25995)

  • Add group prefix to decorated mapped task (#26081)

  • Fix UI flash when triggering with dup logical date (#26094)

  • Fix Make items nullable for TaskInstance related endpoints to avoid API errors (#26076)

  • Fix BranchDateTimeOperator to be timezone-awreness-insensitive (#25944)

  • Fix legacy timetable schedule interval params (#25999)

  • Fix response schema for list-mapped-task-instance (#25965)

  • Properly check the existence of missing mapped TIs (#25788)

  • Fix broken auto-refresh on grid view (#25950)

  • Use per-timetable ordering in grid UI (#25880)

  • Rewrite recursion when parsing DAG into iteration (#25898)

  • Find cross-group tasks in iter_mapped_dependants (#25793)

  • Fail task if mapping upstream fails (#25757)

  • Support / in variable get endpoint (#25774)

  • Use cfg default_wrap value for grid logs (#25731)

  • Add origin request args when triggering a run (#25729)

  • Operator name separate from class (#22834)

  • Fix incorrect data interval alignment due to assumption on input time alignment (#22658)

  • Return None if an XComArg fails to resolve (#25661)

  • Correct json arg help in airflow variables set command (#25726)

  • Added MySQL index hint to use ti_state on find_zombies query (#25725)

  • Only excluded actually expanded fields from render (#25599)

  • Grid, fix toast for axios errors (#25703)

  • Fix UI redirect (#26409)

  • Require dag_id arg for dags list-runs (#26357)

  • Check for queued states for dags auto-refresh (#25695)

  • Fix upgrade code for the dag_owner_attributes table (#25579)

  • Add map index to task logs api (#25568)

  • Ensure that zombie tasks for dags with errors get cleaned up (#25550)

  • Make extra link work in UI (#25500)

  • Sync up plugin API schema and definition (#25524)

  • First/last names can be empty (#25476)

  • Refactor DAG pages to be consistent (#25402)

  • Check expand_kwargs() input type before unmapping (#25355)

  • Filter XCOM by key when calculating map lengths (#24530)

  • Fix ExternalTaskSensor not working with dynamic task (#25215)

  • Added exception catching to send default email if template file raises any exception (#24943)

  • Bring MappedOperator members in sync with BaseOperator (#24034)


  • Add automatically generated ERD schema for the MetaData DB (#26217)

  • Mark serialization functions as internal (#26193)

  • Remove remaining deprecated classes and replace them with PEP562 (#26167)

  • Move dag_edges and task_group_to_dict to corresponding util modules (#26212)

  • Lazily import many modules to improve import speed (#24486, #26239)

  • FIX Incorrect typing information (#26077)

  • Add missing contrib classes to deprecated dictionaries (#26179)

  • Re-configure/connect the ORM after forking to run a DAG processor (#26216)

  • Remove cattrs from lineage processing. (#26134)

  • Removed deprecated contrib files and replace them with PEP-562 getattr (#26153)

  • Make BaseSerialization.serialize “public” to other classes. (#26142)

  • Change the template to use human readable task_instance description (#25960)

  • Bump moment-timezone from 0.5.34 to 0.5.35 in /airflow/www (#26080)

  • Fix Flask deprecation warning (#25753)

  • Add CamelCase to generated operations types (#25887)

  • Fix migration issues and tighten the CI upgrade/downgrade test (#25869)

  • Fix type annotations in SkipMixin (#25864)

  • Workaround setuptools editable packages path issue (#25848)

  • Bump undici from 5.8.0 to 5.9.1 in /airflow/www (#25801)

  • Add custom_operator_name attr to _BranchPythonDecoratedOperator (#25783)

  • Clarify filename_template deprecation message (#25749)

  • Use ParamSpec to replace ... in Callable (#25658)

  • Remove deprecated modules (#25543)

  • Documentation on task mapping additions (#24489)

  • Remove Smart Sensors (#25507)

  • Fix elasticsearch test config to avoid warning on deprecated template (#25520)

  • Bump terser from 4.8.0 to 4.8.1 in /airflow/ui (#25178)

  • Generate typescript types from rest API docs (#25123)

  • Upgrade utils files to typescript (#25089)

  • Upgrade remaining context file to typescript. (#25096)

  • Migrate files to ts (#25267)

  • Upgrade grid Table component to ts. (#25074)

  • Skip mapping against mapped ti if it returns None (#25047)

  • Refactor js file structure (#25003)

  • Move mapped kwargs introspection to separate type (#24971)

  • Only assert stuff for mypy when type checking (#24937)

  • Bump moment from 2.29.3 to 2.29.4 in /airflow/www (#24885)

  • Remove “bad characters” from our codebase (#24841)

  • Remove xcom_push flag from BashOperator (#24824)

  • Move Flask hook registration to end of file (#24776)

  • Upgrade more javascript files to typescript (#24715)

  • Clean up task decorator type hints and docstrings (#24667)

  • Preserve original order of providers’ connection extra fields in UI (#24425)

  • Rename charts.css to chart.css (#24531)

  • Rename grid.css to chart.css (#24529)

  • Misc: create new process group by set_new_process_group utility (#24371)

  • Airflow UI fix Prototype Pollution (#24201)

  • Bump moto version (#24222)

  • Remove unused [github_enterprise] from ref docs (#24033)

  • Clean up f-strings in logging calls (#23597)

  • Add limit for JPype1 (#23847)

  • Simply json responses (#25518)

  • Add min attrs version (#26408)

Doc only changes

  • Add url prefix setting for Celery Flower (#25986)

  • Updating deprecated configuration in examples (#26037)

  • Fix wrong link for taskflow tutorial (#26007)

  • Reorganize tutorials into a section (#25890)

  • Fix concept doc for dynamic task map (#26002)

  • Update code examples from “classic” operators to taskflow (#25845, #25657)

  • Add instructions on manually fixing MySQL Charset problems (#25938)

  • Prefer the local Quick Start in docs (#25888)

  • Fix broken link to Trigger Rules (#25840)

  • Improve docker documentation (#25735)

  • Correctly link to Dag parsing context in docs (#25722)

  • Add note on task_instance_mutation_hook usage (#25607)

  • Note that TaskFlow API automatically passes data between tasks (#25577)

  • Update DAG run to clarify when a DAG actually runs (#25290)

  • Update tutorial docs to include a definition of operators (#25012)

  • Rewrite the Airflow documentation home page (#24795)

  • Fix task-generated mapping example (#23424)

  • Add note on subtle logical date change in 2.2.0 (#24413)

  • Add missing import in best-practices code example (#25391)

Airflow 2.3.4 (2022-08-23)

Significant Changes

Added new config [logging]log_formatter_class to fix timezone display for logs on UI (#24811)

If you are using a custom Formatter subclass in your [logging]logging_config_class, please inherit from airflow.utils.log.timezone_aware.TimezoneAware instead of logging.Formatter. For example, in your

from airflow.utils.log.timezone_aware import TimezoneAware

# before
class YourCustomFormatter(logging.Formatter):

# after
class YourCustomFormatter(TimezoneAware):

AIRFLOW_FORMATTER = LOGGING_CONFIG["formatters"]["airflow"]
AIRFLOW_FORMATTER["class"] = "somewhere.your.custom_config.YourCustomFormatter"
# or use TimezoneAware class directly. If you don't have custom Formatter.
AIRFLOW_FORMATTER["class"] = "airflow.utils.log.timezone_aware.TimezoneAware"

Bug Fixes

  • Disable attrs state management on MappedOperator (#24772)

  • Serialize pod_override to JSON before pickling executor_config (#24356)

  • Fix pid check (#24636)

  • Rotate session id during login (#25771)

  • Fix mapped sensor with reschedule mode (#25594)

  • Cache the custom secrets backend so the same instance gets reused (#25556)

  • Add right padding (#25554)

  • Fix reducing mapped length of a mapped task at runtime after a clear (#25531)

  • Fix airflow db reset when dangling tables exist (#25441)

  • Change disable_verify_ssl behaviour (#25023)

  • Set default task group in dag.add_task method (#25000)

  • Removed interfering force of index. (#25404)

  • Remove useless logging line (#25347)

  • Adding mysql index hint to use index on task_instance.state in critical section query (#25673)

  • Configurable umask to all daemonized processes. (#25664)

  • Fix the errors raised when None is passed to template filters (#25593)

  • Allow wildcarded CORS origins (#25553)

  • Fix “This Session’s transaction has been rolled back” (#25532)

  • Fix Serialization error in TaskCallbackRequest (#25471)

  • fix - resolve bash by absolute path (#25331)

  • Add __repr__ to ParamsDict class (#25305)

  • Only load distribution of a name once (#25296)

  • convert TimeSensorAsync target_time to utc on call time (#25221)

  • call updateNodeLabels after expandGroup (#25217)

  • Stop SLA callbacks gazumping other callbacks and DOS’ing the DagProcessorManager queue (#25147)

  • Fix invalidateQueries call (#25097)

  • airflow/www/package.json: Add name, version fields. (#25065)

  • No grid auto-refresh for backfill dag runs (#25042)

  • Fix tag link on dag detail page (#24918)

  • Fix zombie task handling with multiple schedulers (#24906)

  • Bind log server on worker to IPv6 address (#24755) (#24846)

  • Add %z for %(asctime)s to fix timezone for logs on UI (#24811)

  • TriggerDagRunOperator.operator_extra_links is attr (#24676)

  • Send DAG timeout callbacks to processor outside of prohibit_commit (#24366)

  • Don’t rely on current ORM structure for db clean command (#23574)

  • Clear next method when clearing TIs (#23929)

  • Two typing fixes (#25690)

Doc only changes

  • Update set-up-database.rst (#24983)

  • Fix syntax in mysql setup documentation (#24893 (#24939)

  • Note how DAG policy works with default_args (#24804)

  • Update PythonVirtualenvOperator Howto (#24782)

  • Doc: Add hyperlinks to Github PRs for Release Notes (#24532)


  • Remove depreciation warning when use default remote tasks logging handlers (#25764)

  • clearer method name in (#23702)

  • Bump cattrs version (#25689)

  • Include missing mention of external_executor_id in sql_engine_collation_for_ids docs (#25197)

  • Refactor DR.task_instance_scheduling_decisions (#24774)

  • Sort operator extra links (#24992)

  • Extends resolve_xcom_backend function level documentation (#24965)

  • Upgrade FAB to 4.1.3 (#24884)

  • Limit Flask to <2.3 in the wake of 2.2 breaking our tests (#25511)

  • Limit astroid version to < 2.12 (#24982)

  • Move javascript compilation to host (#25169)

  • Bump typing-extensions and mypy for ParamSpec (#25088)

Airflow 2.3.3 (2022-07-09)

Significant Changes

We’ve upgraded Flask App Builder to a major version 4.* (#24399)

Flask App Builder is one of the important components of Airflow Webserver, as it uses a lot of dependencies that are essential to run the webserver and integrate it in enterprise environments - especially authentication.

The FAB 4.* upgrades a number of dependencies to major releases, which upgrades them to versions that have a number of security issues fixed. A lot of tests were performed to bring the dependencies in a backwards-compatible way, however the dependencies themselves implement breaking changes in their internals so it might be that some of those changes might impact the users in case they are using the libraries for their own purposes.

One important change that you likely will need to apply to Oauth configuration is to add server_metadata_url or jwks_uri and you can read about it more in this issue.

Here is the list of breaking changes in dependencies that comes together with FAB 4:

Bug Fixes

  • Fix exception in mini task scheduler (#24865)

  • Fix cycle bug with attaching label to task group (#24847)

  • Fix timestamp defaults for sensorinstance (#24638)

  • Move fallible ti.task.dag assignment back inside try/except block (#24533) (#24592)

  • Add missing types to FSHook (#24470)

  • Mask secrets in stdout for airflow tasks test (#24362)

  • DebugExecutor use instead of ti._run_raw_task (#24357)

  • Fix bugs in URI constructor for MySQL connection (#24320)

  • Missing scheduleinterval nullable true added in openapi (#24253)

  • Unify return_code interface for task runner (#24093)

  • Handle occasional deadlocks in trigger with retries (#24071)

  • Remove special serde logic for mapped op_kwargs (#23860)

  • ExternalTaskSensor respects soft_fail if the external task enters a failed_state (#23647)

  • Fix StatD timing metric units (#21106)

  • Add cache_ok flag to sqlalchemy TypeDecorators. (#24499)

  • Allow for LOGGING_LEVEL=DEBUG (#23360)

  • Fix grid date ticks (#24738)

  • Debounce status highlighting in Grid view (#24710)

  • Fix Grid vertical scrolling (#24684)

  • don’t try to render child rows for closed groups (#24637)

  • Do not calculate grid root instances (#24528)

  • Maintain grid view selection on filtering upstream (#23779)

  • Speed up grid_data endpoint by 10x (#24284)

  • Apply per-run log templates to log handlers (#24153)

  • Don’t crash scheduler if exec config has old k8s objects (#24117)

  • TI.log_url fix for map_index (#24335)

  • Fix migration 0080_2_0_2 - Replace null values before setting column not null (#24585)

  • Patch sql_alchemy_conn if old Postgres schemes used (#24569)

  • Seed log_template table (#24511)

  • Fix deprecated log_id_template value (#24506)

  • Fix toast messages (#24505)

  • Add indexes for CASCADE deletes for task_instance (#24488)

  • Return empty dict if Pod JSON encoding fails (#24478)

  • Improve grid rendering performance with a custom tooltip (#24417, #24449)

  • Check for run_id for grid group summaries (#24327)

  • Optimize calendar view for cron scheduled DAGs (#24262)

  • Use get_hostname instead of socket.getfqdn (#24260)

  • Check that edge nodes actually exist (#24166)

  • Fix useTasks crash on error (#24152)

  • Do not fail re-queued TIs (#23846)

  • Reduce grid view API calls (#24083)

  • Rename Permissions to Permission Pairs. (#24065)

  • Replace use_task_execution_date with use_task_logical_date (#23983)

  • Grid fix details button truncated and small UI tweaks (#23934)

  • Add TaskInstance State REMOVED to finished states and success states (#23797)

  • Fix mapped task immutability after clear (#23667)

  • Fix permission issue for dag that has dot in name (#23510)

  • Fix closing connection dbapi.get_pandas_df (#23452)

  • Check bag DAG schedule_interval match timetable (#23113)

  • Parse error for task added to multiple groups (#23071)

  • Fix flaky order of returned dag runs (#24405)

  • Migrate jsx files that affect run/task selection to tsx (#24509)

  • Fix links to sources for examples (#24386)

  • Set proper Content-Type and chartset on grid_data endpoint (#24375)

Doc only changes

  • Update templates doc to mention extras and format Airflow Vars / Conns (#24735)

  • Document built in Timetables (#23099)

  • Alphabetizes two tables (#23923)

  • Clarify that users should not use Maria DB (#24556)

  • Add imports to deferring code samples (#24544)

  • Add note about image regeneration in June 2022 (#24524)

  • Small cleanup of get_current_context() chapter (#24482)

  • Fix default 2.2.5 log_id_template (#24455)

  • Update description of installing providers separately from core (#24454)

  • Mention context variables and logging (#24304)


  • Remove internet explorer support (#24495)

  • Removing magic status code numbers from api_connexion (#24050)

  • Upgrade FAB to 4.1.2 (#24619)

  • Switch Markdown engine to markdown-it-py (#19702)

  • Update rich to latest version across the board. (#24186)

  • Get rid of TimedJSONWebSignatureSerializer (#24519)

  • Update flask-appbuilder authlib/ oauth dependency (#24516)

  • Upgrade to webpack 5 (#24485)

  • Add typescript (#24337)

  • The JWT claims in the request to retrieve logs have been standardized: we use nbf and aud claims for maturity and audience of the requests. Also “filename” payload field is used to keep log name. (#24519)

  • Address all yarn test warnings (#24722)

  • Upgrade to react 18 and chakra 2 (#24430)

  • Refactor DagRun.verify_integrity (#24114)

  • Upgrade FAB to 4.1.1 (#24399)

  • We now need at least Flask-WTF 0.15 (#24621)

Airflow 2.3.2 (2022-06-04)

No significant changes.

Bug Fixes

  • Run the check_migration loop at least once

  • Fix grid view for mapped tasks (#24059)

  • Icons in grid view for different DAG run types (#23970)

  • Faster grid view (#23951)

  • Disallow calling expand with no arguments (#23463)

  • Add missing is_mapped field to Task response. (#23319)

  • DagFileProcessorManager: Start a new process group only if current process not a session leader (#23872)

  • Mask sensitive values for not-yet-running TIs (#23807)

  • Add cascade to dag_tag to dag foreign key (#23444)

  • Use --subdir argument value for standalone dag processor. (#23864)

  • Highlight task states by hovering on legend row (#23678)

  • Fix and speed up grid view (#23947)

  • Prevent UI from crashing if grid task instances are null (#23939)

  • Remove redundant register exit signals in dag-processor command (#23886)

  • Add __wrapped__ property to _TaskDecorator (#23830)

  • Fix UnboundLocalError when sql is empty list in DbApiHook (#23816)

  • Enable clicking on DAG owner in autocomplete dropdown (#23804)

  • Simplify flash message for _airflow_moved tables (#23635)

  • Exclude missing tasks from the gantt view (#23627)

Doc only changes

  • Add column names for DB Migration Reference (#23853)


  • Remove pinning for xmltodict (#23992)

Airflow 2.3.1 (2022-05-25)

Significant Changes

No significant changes.

Bug Fixes

  • Automatically reschedule stalled queued tasks in CeleryExecutor (#23690)

  • Fix expand/collapse all buttons (#23590)

  • Grid view status filters (#23392)

  • Expand/collapse all groups (#23487)

  • Fix retrieval of deprecated non-config values (#23723)

  • Fix secrets rendered in UI when task is not executed. (#22754)

  • Fix provider import error matching (#23825)

  • Fix regression in ignoring symlinks (#23535)

  • Fix dag-processor fetch metadata database config (#23575)

  • Fix auto upstream dep when expanding non-templated field (#23771)

  • Fix task log is not captured (#23684)

  • Add reschedule to the serialized fields for the BaseSensorOperator (#23674)

  • Modify db clean to also catch the ProgrammingError exception (#23699)

  • Remove titles from link buttons (#23736)

  • Fix grid details header text overlap (#23728)

  • Ensure execution_timeout as timedelta (#23655)

  • Don’t run pre-migration checks for downgrade (#23634)

  • Add index for event column in log table (#23625)

  • Implement send_callback method for CeleryKubernetesExecutor and LocalKubernetesExecutor (#23617)

  • Fix PythonVirtualenvOperator templated_fields (#23559)

  • Apply specific ID collation to root_dag_id too (#23536)

  • Prevent KubernetesJobWatcher getting stuck on resource too old (#23521)

  • Fix scheduler crash when expanding with mapped task that returned none (#23486)

  • Fix broken dagrun links when many runs start at the same time (#23462)

  • Fix: Exception when parsing log #20966 (#23301)

  • Handle invalid date parsing in webserver views. (#23161)

  • Pools with negative open slots should not block other pools (#23143)

  • Move around overflow, position and padding (#23044)

  • Change approach to finding bad rows to LEFT OUTER JOIN. (#23528)

  • Only count bad refs when moved table exists (#23491)

  • Visually distinguish task group summary (#23488)

  • Remove color change for highly nested groups (#23482)

  • Optimize 2.3.0 pre-upgrade check queries (#23458)

  • Add backward compatibility for core__sql_alchemy_conn__cmd (#23441)

  • Fix literal cross product expansion (#23434)

  • Fix broken task instance link in xcom list (#23367)

  • Fix connection test button (#23345)

  • fix cli airflow dags show for mapped operator (#23339)

  • Hide some task instance attributes (#23338)

  • Don’t show grid actions if server would reject with permission denied (#23332)

  • Use run_id for ti.mark_success_url (#23330)

  • Fix update user auth stats (#23314)

  • Use <Time /> in Mapped Instance table (#23313)

  • Fix duplicated Kubernetes DeprecationWarnings (#23302)

  • Store grid view selection in url params (#23290)

  • Remove custom signal handling in Triggerer (#23274)

  • Override pool for TaskInstance when pool is passed from cli. (#23258)

  • Show warning if ‘/’ is used in a DAG run ID (#23106)

  • Use kubernetes queue in kubernetes hybrid executors (#23048)

  • Add tags inside try block. (#21784)

Doc only changes

  • Move dag_processing.processor_timeouts to counters section (#23393)

  • Clarify that bundle extras should not be used for PyPi installs (#23697)

  • Synchronize support for Postgres and K8S in docs (#23673)

  • Replace DummyOperator references in docs (#23502)

  • Add doc notes for keyword-only args for expand() and partial() (#23373)

  • Document fix for broken elasticsearch logs with 2.3.0+ upgrade (#23821)


  • Add typing for airflow/ (#23716)

  • Disable Flower by default from docker-compose (#23685)

  • Added postgres 14 to support versions(including breeze) (#23506)

  • add K8S 1.24 support (#23637)

  • Refactor code references from tree to grid (#23254)

Airflow 2.3.0 (2022-04-30)

For production docker image related changes, see the Docker Image Changelog.

Significant Changes

Passing execution_date to XCom.set(), XCom.clear() , XCom.get_one() , and XCom.get_many() is deprecated (#19825)

Continuing the effort to bind TaskInstance to a DagRun, XCom entries are now also tied to a DagRun. Use the run_id argument to specify the DagRun instead.

Task log templates are now read from the metadata database instead of airflow.cfg (#20165)

Previously, a task’s log is dynamically rendered from the [core] log_filename_template and [elasticsearch] log_id_template config values at runtime. This resulted in unfortunate characteristics, e.g. it is impractical to modify the config value after an Airflow instance is running for a while, since all existing task logs have be saved under the previous format and cannot be found with the new config value.

A new log_template table is introduced to solve this problem. This table is synchronized with the aforementioned config values every time Airflow starts, and a new field log_template_id is added to every DAG run to point to the format used by tasks (NULL indicates the first ever entry for compatibility).

Minimum kubernetes library version bumped from 3.0.0 to 21.7.0 (#20759)


This is only about changing the kubernetes library, not the Kubernetes cluster. Airflow support for Kubernetes version is described in Installation prerequisites.

No change in behavior is expected. This was necessary in order to take advantage of a bugfix concerning refreshing of Kubernetes API tokens with EKS, which enabled the removal of some workaround code.

XCom now defined by run_id instead of execution_date (#20975)

As a continuation to the TaskInstance-DagRun relation change started in Airflow 2.2, the execution_date columns on XCom has been removed from the database, and replaced by an association proxy field at the ORM level. If you access Airflow’s metadata database directly, you should rewrite the implementation to use the run_id column instead.

Note that Airflow’s metadatabase definition on both the database and ORM levels are considered implementation detail without strict backward compatibility guarantees.

Non-JSON-serializable params deprecated (#21135).

It was previously possible to use dag or task param defaults that were not JSON-serializable.

For example this worked previously:

@dag.task(params={"a": {1, 2, 3}, "b":})
def datetime_param(value):

datetime_param("{{ params.a }} | {{ params.b }}")

Note the use of set and datetime types, which are not JSON-serializable. This behavior is problematic because to override these values in a dag run conf, you must use JSON, which could make these params non-overridable. Another problem is that the support for param validation assumes JSON. Use of non-JSON-serializable params will be removed in Airflow 3.0 and until then, use of them will produce a warning at parse time.

You must use postgresql:// instead of postgres:// in sql_alchemy_conn for SQLAlchemy 1.4.0+ (#21205)

When you use SQLAlchemy 1.4.0+, you need to use postgresql:// as the scheme in the sql_alchemy_conn. In the previous versions of SQLAlchemy it was possible to use postgres:// , but using it in SQLAlchemy 1.4.0+ results in:

>       raise exc.NoSuchModuleError(
            "Can't load plugin: %s:%s" % (, name)
E       sqlalchemy.exc.NoSuchModuleError: Can't load plugin: sqlalchemy.dialects:postgres

If you cannot change the scheme of your URL immediately, Airflow continues to work with SQLAlchemy 1.3 and you can downgrade SQLAlchemy, but we recommend updating the scheme. Details in the SQLAlchemy Changelog.

auth_backends replaces auth_backend configuration setting (#21472)

Previously, only one backend was used to authorize use of the REST API. In 2.3 this was changed to support multiple backends, separated by comma. Each will be tried in turn until a successful response is returned.

This setting is also used for the deprecated experimental API, which only uses the first option even if multiple are given.

airflow.models.base.Operator is removed (#21505)

Previously, there was an empty class airflow.models.base.Operator for “type hinting”. This class was never really useful for anything (everything it did could be done better with airflow.models.baseoperator.BaseOperator), and has been removed. If you are relying on the class’s existence, use BaseOperator (for concrete operators), airflow.models.abstractoperator.AbstractOperator (the base class of both BaseOperator and the AIP-42 MappedOperator), or airflow.models.operator.Operator (a union type BaseOperator | MappedOperator for type annotation).

Zip files in the DAGs folder can no longer have a .py extension (#21538)

It was previously possible to have any extension for zip files in the DAGs folder. Now .py files are going to be loaded as modules without checking whether it is a zip file, as it leads to less IO. If a .py file in the DAGs folder is a zip compressed file, parsing it will fail with an exception.

auth_backends includes session (#21640)

To allow the Airflow UI to use the API, the previous default authorization backend airflow.api.auth.backend.deny_all is changed to airflow.api.auth.backend.session, and this is automatically added to the list of API authorization backends if a non-default value is set.

Default templates for log filenames and elasticsearch log_id changed (#21734)

In order to support Dynamic Task Mapping the default templates for per-task instance logging has changed. If your config contains the old default values they will be upgraded-in-place.

If you are happy with the new config values you should remove the setting in airflow.cfg and let the default value be used. Old default values were:

  • [core] log_filename_template: {{ ti.dag_id }}/{{ ti.task_id }}/{{ ts }}/{{ try_number }}.log

  • [elasticsearch] log_id_template: {dag_id}-{task_id}-{execution_date}-{try_number}

[core] log_filename_template now uses “hive partition style” of dag_id=<id>/run_id=<id> by default, which may cause problems on some older FAT filesystems. If this affects you then you will have to change the log template.

If you have customized the templates you should ensure that they contain {{ ti.map_index }} if you want to use dynamically mapped tasks.

If after upgrading you find your task logs are no longer accessible, try adding a row in the log_template table with id=0 containing your previous log_id_template and log_filename_template. For example, if you used the defaults in 2.2.5:

INSERT INTO log_template (id, filename, elasticsearch_id, created_at) VALUES (0, '{{ ti.dag_id }}/{{ ti.task_id }}/{{ ts }}/{{ try_number }}.log', '{dag_id}-{task_id}-{execution_date}-{try_number}', NOW());

ReadyToRescheduleDep now only runs when reschedule is True (#21815)

When a ReadyToRescheduleDep is run, it now checks whether the reschedule attribute on the operator, and always reports itself as passed unless it is set to True. If you use this dep class on your custom operator, you will need to add this attribute to the operator class. Built-in operator classes that use this dep class (including sensors and all subclasses) already have this attribute and are not affected.

The deps attribute on an operator class should be a class level attribute (#21815)

To support operator-mapping (AIP 42), the deps attribute on operator class must be a set at the class level. This means that if a custom operator implements this as an instance-level variable, it will not be able to be used for operator-mapping. This does not affect existing code, but we highly recommend you to restructure the operator’s dep logic in order to support the new feature.

Deprecation: Connection.extra must be JSON-encoded dict (#21816)


From Airflow 3.0, the extra field in airflow connections must be a JSON-encoded Python dict.

What, why, and when?

Airflow’s Connection is used for storing credentials. For storage of information that does not fit into user / password / host / schema / port, we have the extra string field. Its intention was always to provide for storage of arbitrary key-value pairs, like no_host_key_check in the SSH hook, or keyfile_dict in GCP.

But since the field is string, it’s technically been permissible to store any string value. For example one could have stored the string value '' and used this in the hook. But this is a very bad practice. One reason is intelligibility: when you look at the value for extra , you don’t have any idea what its purpose is. Better would be to store {"api_host": ""} which at least tells you something about the value. Another reason is extensibility: if you store the API host as a simple string value, what happens if you need to add more information, such as the API endpoint, or credentials? Then you would need to convert the string to a dict, and this would be a breaking change.

For these reason, starting in Airflow 3.0 we will require that the Connection.extra field store a JSON-encoded Python dict.

How will I be affected?

For users of providers that are included in the Airflow codebase, you should not have to make any changes because in the Airflow codebase we should not allow hooks to misuse the Connection.extra field in this way.

However, if you have any custom hooks that store something other than JSON dict, you will have to update it. If you do, you should see a warning any time that this connection is retrieved or instantiated (e.g. it should show up in task logs).

To see if you have any connections that will need to be updated, you can run this command:

airflow connections export - 2>&1 >/dev/null | grep 'non-JSON'

This will catch any warnings about connections that are storing something other than JSON-encoded Python dict in the extra field.

The tree default view setting has been renamed to grid (#22167)

If you set the dag_default_view config option or the default_view argument to DAG() to tree you will need to update your deployment. The old name will continue to work but will issue warnings.

Database configuration moved to new section (#22284)

The following configurations have been moved from [core] to the new [database] section. However when reading the new option, the old option will be checked to see if it exists. If it does a DeprecationWarning will be issued and the old option will be used instead.

  • sql_alchemy_conn

  • sql_engine_encoding

  • sql_engine_collation_for_ids

  • sql_alchemy_pool_enabled

  • sql_alchemy_pool_size

  • sql_alchemy_max_overflow

  • sql_alchemy_pool_recycle

  • sql_alchemy_pool_pre_ping

  • sql_alchemy_schema

  • sql_alchemy_connect_args

  • load_default_connections

  • max_db_retries

Remove requirement that custom connection UI fields be prefixed (#22607)

Hooks can define custom connection fields for their connection type by implementing method get_connection_form_widgets. These custom fields appear in the web UI as additional connection attributes, but internally they are stored in the connection extra dict field. For technical reasons, previously, when stored in the extra dict, the custom field’s dict key had to take the form extra__<conn type>__<field name>. This had the consequence of making it more cumbersome to define connections outside of the UI, since the prefix extra__<conn type>__ makes it tougher to read and work with. With #22607, we make it so that you can now define custom fields such that they can be read from and stored in extra without the prefix.

To enable this, update the dict returned by the get_connection_form_widgets method to remove the prefix from the keys. Internally, the providers manager will still use a prefix to ensure each custom field is globally unique, but the absence of a prefix in the returned widget dict will signal to the Web UI to read and store custom fields without the prefix. Note that this is only a change to the Web UI behavior; when updating your hook in this way, you must make sure that when your hook reads the extra field, it will also check for the prefixed value for backward compatibility.

The webserver.X_FRAME_ENABLED configuration works according to description now (#23222).

In Airflow 2.0.0 - 2.2.4 the webserver.X_FRAME_ENABLED parameter worked the opposite of its description, setting the value to “true” caused “X-Frame-Options” header to “DENY” (not allowing Airflow to be used in an iframe). When you set it to “false”, the header was not added, so Airflow could be embedded in an iframe. By default Airflow could not be embedded in an iframe.

In Airflow 2.2.5 there was a bug introduced that made it impossible to disable Airflow to work in iframe. No matter what the configuration was set, it was possible to embed Airflow in an iframe.

Airflow 2.3.0 restores the original meaning to the parameter. If you set it to “true” (default) Airflow can be embedded in an iframe (no header is added), but when you set it to “false” the header is added and Airflow cannot be embedded in an iframe.

New Features

  • Add dynamic task mapping (AIP-42)

  • New Grid View replaces Tree View (#18675)

  • Templated requirements.txt in Python Operators (#17349)

  • Allow reuse of decorated tasks (#22941)

  • Move the database configuration to a new section (#22284)

  • Add SmoothOperator (#22813)

  • Make operator’s execution_timeout configurable (#22389)

  • Events Timetable (#22332)

  • Support dag serialization with custom ti_deps rules (#22698)

  • Support log download in task log view (#22804)

  • support for continue backfill on failures (#22697)

  • Add dag-processor cli command (#22305)

  • Add possibility to create users in LDAP mode (#22619)

  • Add ignore_first_depends_on_past for scheduled jobs (#22491)

  • Update base sensor operator to support XCOM return value (#20656)

  • Add an option for run id in the ui trigger screen (#21851)

  • Enable JSON serialization for connections (#19857)

  • Add REST API endpoint for bulk update of DAGs (#19758)

  • Add queue button to click-on-DagRun interface. (#21555)

  • Add list-import-errors to airflow dags command (#22084)

  • Store callbacks in database if standalone_dag_processor config is True. (#21731)

  • Add LocalKubernetesExecutor (#19729)

  • Add celery.task_timeout_error metric (#21602)

  • Airflow db downgrade cli command (#21596)

  • Add ALL_SKIPPED trigger rule (#21662)

  • Add db clean CLI command for purging old data (#20838)

  • Add celery_logging_level (#21506)

  • Support different timeout value for dag file parsing (#21501)

  • Support generating SQL script for upgrades (#20962)

  • Add option to compress Serialized dag data (#21332)

  • Branch python operator decorator (#20860)

  • Add Audit Log View to Dag View (#20733)

  • Add missing StatsD metric for failing SLA Callback notification (#20924)

  • Add ShortCircuitOperator configurability for respecting downstream trigger rules (#20044)

  • Allow using Markup in page title in Webserver (#20888)

  • Add Listener Plugin API that tracks TaskInstance state changes (#20443)

  • Add context var hook to inject more env vars (#20361)

  • Add a button to set all tasks to skipped (#20455)

  • Cleanup pending pods (#20438)

  • Add config to warn public deployment exposure in UI (#18557)

  • Log filename template records (#20165)

  • Added windows extensions (#16110)

  • Showing approximate time until next dag_run in Airflow (#20273)

  • Extend config window on UI (#20052)

  • Add show dag dependencies feature to CLI (#19985)

  • Add cli command for ‘airflow dags reserialize` (#19471)

  • Add missing description field to Pool schema(REST API) (#19841)

  • Introduce DagRun action to change state to queued. (#19353)

  • Add DAG run details page (#19705)

  • Add role export/import to cli tools (#18916)

  • Adding dag_id_pattern parameter to the /dags endpoint (#18924)


  • Show schedule_interval/timetable description in UI (#16931)

  • Added column duration to DAG runs view (#19482)

  • Enable use of custom conn extra fields without prefix (#22607)

  • Initialize finished counter at zero (#23080)

  • Improve logging of optional provider features messages (#23037)

  • Meaningful error message in resolve_template_files (#23027)

  • Update ImportError items instead of deleting and recreating them (#22928)

  • Add option --skip-init to db reset command (#22989)

  • Support importing connections from files with “.yml” extension (#22872)

  • Support glob syntax in .airflowignore files (#21392) (#22051)

  • Hide pagination when data is a single page (#22963)

  • Support for sorting DAGs in the web UI (#22671)

  • Speed up has_access decorator by ~200ms (#22858)

  • Add XComArg to lazy-imported list of Airflow module (#22862)

  • Add more fields to REST API dags/dag_id/details endpoint (#22756)

  • Don’t show irrelevant/duplicated/”internal” Task attrs in UI (#22812)

  • No need to load whole ti in current_state (#22764)

  • Pickle dag exception string fix (#22760)

  • Better verification of Localexecutor’s parallelism option (#22711)

  • log backfill exceptions to sentry (#22704)

  • retry commit on MySQL deadlocks during backfill (#22696)

  • Add more fields to REST API get DAG(dags/dag_id) endpoint (#22637)

  • Use timetable to generate planned days for current year (#22055)

  • Disable connection pool for celery worker (#22493)

  • Make date picker label visible in trigger dag view (#22379)

  • Expose try_number in airflow vars (#22297)

  • Add generic connection type (#22310)

  • Add a few more fields to the taskinstance finished log message (#22262)

  • Pause auto-refresh if scheduler isn’t running (#22151)

  • Show DagModel details. (#21868)

  • Add pip_install_options to PythonVirtualenvOperator (#22158)

  • Show import error for airflow dags list CLI command (#21991)

  • Pause auto-refresh when page is hidden (#21904)

  • Default args type check (#21809)

  • Enhance magic methods on XComArg for UX (#21882)

  • py files don’t have to be checked is_zipfiles in refresh_dag (#21926)

  • Fix TaskDecorator type hints (#21881)

  • Add ‘Show record’ option for variables (#21342)

  • Use DB where possible for quicker airflow dag subcommands (#21793)

  • REST API: add rendered fields in task instance. (#21741)

  • Change the default auth backend to session (#21640)

  • Don’t check if py DAG files are zipped during parsing (#21538)

  • Switch XCom implementation to use run_id (#20975)

  • Action log on Browse Views (#21569)

  • Implement multiple API auth backends (#21472)

  • Change logging level details of connection info in get_connection() (#21162)

  • Support mssql in airflow db shell (#21511)

  • Support config worker_enable_remote_control for celery (#21507)

  • Log memory usage in CgroupTaskRunner (#21481)

  • Modernize DAG-related URL routes and rename “tree” to “grid” (#20730)

  • Move Zombie detection to SchedulerJob (#21181)

  • Improve speed to run airflow by 6x (#21438)

  • Add more SQL template fields renderers (#21237)

  • Simplify fab has access lookup (#19294)

  • Log context only for default method (#21244)

  • Log trigger status only if at least one is running (#21191)

  • Add optional features in providers. (#21074)

  • Better multiple_outputs inferral for @task.python (#20800)

  • Improve handling of string type and non-attribute template_fields (#21054)

  • Remove un-needed deps/version requirements (#20979)

  • Correctly specify overloads for TaskFlow API for type-hinting (#20933)

  • Introduce notification_sent to SlaMiss view (#20923)

  • Rewrite the task decorator as a composition (#20868)

  • Add “Greater/Smaller than or Equal” to filters in the browse views (#20602) (#20798)

  • Rewrite DAG run retrieval in task command (#20737)

  • Speed up creation of DagRun for large DAGs (5k+ tasks) by 25-130% (#20722)

  • Make native environment Airflow-flavored like sandbox (#20704)

  • Better error when param value has unexpected type (#20648)

  • Add filter by state in DagRun REST API (List Dag Runs) (#20485)

  • Prevent exponential memory growth in Tasks with custom logging handler (#20541)

  • Set default logger in logging Mixin (#20355)

  • Reduce deprecation warnings from www (#20378)

  • Add hour and minute to time format on x-axis of all charts using nvd3.lineChart (#20002)

  • Add specific warning when Task asks for more slots than pool defined with (#20178)

  • UI: Update duration column for better human readability (#20112)

  • Use Viewer role as example public role (#19215)

  • Properly implement DAG param dict copying (#20216)

  • ShortCircuitOperator push XCom by returning python_callable result (#20071)

  • Add clear logging to tasks killed due to a Dagrun timeout (#19950)

  • Change log level for Zombie detection messages (#20204)

  • Better confirmation prompts (#20183)

  • Only execute TIs of running DagRuns (#20182)

  • Check and run migration in commands if necessary (#18439)

  • Log only when Zombies exists (#20118)

  • Increase length of the email and username (#19932)

  • Add more filtering options for TI’s in the UI (#19910)

  • Dynamically enable “Test Connection” button by connection type (#19792)

  • Avoid littering postgres server logs with “could not obtain lock” with HA schedulers (#19842)

  • Renamed Connection.get_hook parameter to make it the same as in SqlSensor and SqlOperator. (#19849)

  • Add hook_params in SqlSensor using the latest changes from PR #18718. (#18431)

  • Speed up webserver boot time by delaying provider initialization (#19709)

  • Configurable logging of XCOM value in PythonOperator (#19378)

  • Minimize production js files (#19658)

  • Add hook_params in BaseSqlOperator (#18718)

  • Add missing “end_date” to hash components (#19281)

  • More friendly output of the airflow plugins command + add timetables (#19298)

  • Add sensor default timeout config (#19119)

  • Update taskinstance REST API schema to include dag_run_id field (#19105)

  • Adding feature in bash operator to append the user defined env variable to system env variable (#18944)

  • Duplicate Connection: Added logic to query if a connection id exists before creating one (#18161)

Bug Fixes

  • Use inherited ‘trigger_tasks’ method (#23016)

  • In DAG dependency detector, use class type instead of class name (#21706)

  • Fix tasks being wrongly skipped by schedule_after_task_execution (#23181)

  • Fix X-Frame enabled behaviour (#23222)

  • Allow extra to be nullable in connection payload as per schema(REST API). (#23183)

  • Fix dag_id extraction for dag level access checks in web ui (#23015)

  • Fix timezone display for logs on UI (#23075)

  • Include message in graph errors (#23021)

  • Change trigger dropdown left position (#23013)

  • Don’t add planned tasks for legacy DAG runs (#23007)

  • Add dangling rows check for TaskInstance references (#22924)

  • Validate the input params in connection CLI command (#22688)

  • Fix trigger event payload is not persisted in db (#22944)

  • Drop “airflow moved” tables in command db reset (#22990)

  • Add max width to task group tooltips (#22978)

  • Add template support for external_task_ids. (#22809)

  • Allow DagParam to hold falsy values (#22964)

  • Fix regression in pool metrics (#22939)

  • Priority order tasks even when using pools (#22483)

  • Do not clear XCom when resuming from deferral (#22932)

  • Handle invalid JSON metadata in get_logs_with_metadata endpoint. (#22898)

  • Fix pre-upgrade check for rows dangling w.r.t. dag_run (#22850)

  • Fixed backfill interference with scheduler (#22701)

  • Support conf param override for backfill runs (#22837)

  • Correctly interpolate pool name in PoolSlotsAvailableDep statues (#22807)

  • Fix email_on_failure with render_template_as_native_obj (#22770)

  • Fix processor cleanup on DagFileProcessorManager (#22685)

  • Prevent meta name clash for task instances (#22783)

  • remove json parse for gantt chart (#22780)

  • Check for missing dagrun should know version (#22752)

  • Fixes ScheduleInterval spec (#22635)

  • Fixing task status for non-running and non-committed tasks (#22410)

  • Do not log the hook connection details even at DEBUG level (#22627)

  • Stop crashing when empty logs are received from kubernetes client (#22566)

  • Fix bugs about timezone change (#22525)

  • Fix entire DAG stops when one task has end_date (#20920)

  • Use logger to print message during task execution. (#22488)

  • Make sure finalizers are not skipped during exception handling (#22475)

  • update smart sensor docs and minor fix on is_smart_sensor_compatible() (#22386)

  • Fix run_id k8s and elasticsearch compatibility with Airflow 2.1 (#22385)

  • Allow to except_skip None on BranchPythonOperator (#20411)

  • Fix incorrect datetime details (DagRun views) (#21357)

  • Remove incorrect deprecation warning in secrets backend (#22326)

  • Remove RefreshConfiguration workaround for K8s token refreshing (#20759)

  • Masking extras in GET /connections/<connection> endpoint (#22227)

  • Set queued_dttm when submitting task to directly to executor (#22259)

  • Addressed some issues in the tutorial mentioned in discussion #22233 (#22236)

  • Change default python executable to python3 for docker decorator (#21973)

  • Don’t validate that Params are JSON when NOTSET (#22000)

  • Add per-DAG delete permissions (#21938)

  • Fix handling some None parameters in kubernetes 23 libs. (#21905)

  • Fix handling of empty (None) tags in bulk_write_to_db (#21757)

  • Fix DAG date range bug (#20507)

  • Removed request.referrer from (#21751)

  • Make DbApiHook use get_uri from Connection (#21764)

  • Fix some migrations (#21670)

  • [de]serialize resources on task correctly (#21445)

  • Add params dag_id, task_id etc to XCom.serialize_value (#19505)

  • Update test connection functionality to use custom form fields (#21330)

  • fix all “high” npm vulnerabilities (#21526)

  • Fix bug incorrectly removing action from role, rather than permission. (#21483)

  • Fix relationship join bug in FAB/SecurityManager with SQLA 1.4 (#21296)

  • Use Identity instead of Sequence in SQLAlchemy 1.4 for MSSQL (#21238)

  • Ensure on_task_instance_running listener can get at task (#21157)

  • Return to the same place when triggering a DAG (#20955)

  • Fix task ID deduplication in @task_group (#20870)

  • Add downgrade to some FAB migrations (#20874)

  • Only validate Params when DAG is triggered (#20802)

  • Fix airflow trigger cli (#20781)

  • Fix task instances iteration in a pool to prevent blocking (#20816)

  • Allow depending to a @task_group as a whole (#20671)

  • Use original task’s start_date if a task continues after deferral (#20062)

  • Disabled edit button in task instances list view page (#20659)

  • Fix a package name import error (#20519) (#20519)

  • Remove execution_date label when get cleanup pods list (#20417)

  • Remove unneeded FAB REST API endpoints (#20487)

  • Fix parsing of Cloudwatch log group arn containing slashes (#14667) (#19700)

  • Sanity check for MySQL’s TIMESTAMP column (#19821)

  • Allow using default celery command group with executors subclassed from Celery-based executors. (#18189)

  • Move class_permission_name to mixin so it applies to all classes (#18749)

  • Adjust trimmed_pod_id and replace ‘.’ with ‘-‘ (#19036)

  • Pass custom_headers to send_email and send_email_smtp (#19009)

  • Ensure catchup=False is used in example dags (#19396)

  • Edit permalinks in OpenApi description file (#19244)

  • Navigate directly to DAG when selecting from search typeahead list (#18991)

  • [Minor] Fix padding on home page (#19025)

Doc only changes

  • Update doc for DAG file processing (#23209)

  • Replace changelog/updating with release notes and towncrier now (#22003)

  • Fix wrong reference in tracking-user-activity.rst (#22745)

  • Remove references to rbac = True from docs (#22725)

  • Doc: Update description for executor-bound dependencies (#22601)

  • Update check-health.rst (#22372)

  • Stronger language about Docker Compose customizability (#22304)

  • Update logging-tasks.rst (#22116)

  • Add example config of sql_alchemy_connect_args (#22045)

  • Update best-practices.rst (#22053)

  • Add information on DAG pausing/deactivation/deletion (#22025)

  • Add brief examples of integration test dags you might want (#22009)

  • Run inclusive language check on CHANGELOG (#21980)

  • Add detailed email docs for Sendgrid (#21958)

  • Add docs for db upgrade / db downgrade (#21879)

  • Update modules_management.rst (#21889)

  • Fix UPDATING section on SqlAlchemy 1.4 scheme changes (#21887)

  • Update TaskFlow tutorial doc to show how to pass “operator-level” args. (#21446)

  • Fix doc - replace decreasing by increasing (#21805)

  • Add another way to dynamically generate DAGs to docs (#21297)

  • Add extra information about time synchronization needed (#21685)

  • Update debug.rst docs (#21246)

  • Replaces the usage of postgres:// with postgresql:// (#21205)

  • Fix task execution process in CeleryExecutor docs (#20783)


  • Bring back deprecated security manager functions (#23243)

  • Replace usage of DummyOperator with EmptyOperator (#22974)

  • Deprecate DummyOperator in favor of EmptyOperator (#22832)

  • Remove unnecessary python 3.6 conditionals (#20549)

  • Bump moment from 2.29.1 to 2.29.2 in /airflow/www (#22873)

  • Bump prismjs from 1.26.0 to 1.27.0 in /airflow/www (#22823)

  • Bump nanoid from 3.1.23 to 3.3.2 in /airflow/www (#22803)

  • Bump minimist from 1.2.5 to 1.2.6 in /airflow/www (#22798)

  • Remove dag parsing from db init command (#22531)

  • Update our approach for executor-bound dependencies (#22573)

  • Use Airflow.Base.metadata in FAB models (#22353)

  • Limit docutils to make our documentation pretty again (#22420)

  • Add Python 3.10 support (#22050)

  • [FEATURE] add 1.22 1.23 K8S support (#21902)

  • Remove pandas upper limit now that SQLA is 1.4+ (#22162)

  • Patch sql_alchemy_conn if old postgres scheme used (#22333)

  • Protect against accidental misuse of XCom.get_value() (#22244)

  • Order filenames for migrations (#22168)

  • Don’t try to auto generate migrations for Celery tables (#22120)

  • Require SQLAlchemy 1.4 (#22114)

  • bump sphinx-jinja (#22101)

  • Add compat shim for SQLAlchemy to avoid warnings (#21959)

  • Rename xcom.dagrun_id to xcom.dag_run_id (#21806)

  • Deprecate non-JSON conn.extra (#21816)

  • Bump upper bound version of jsonschema to 5.0 (#21712)

  • Deprecate helper utility days_ago (#21653)

  • Remove `:type` lines now sphinx-autoapi supports type hints (#20951)

  • Silence deprecation warning in tests (#20900)

  • Use DagRun.run_id instead of execution_date when updating state of TIs (UI & REST API) (#18724)

  • Add Context stub to Airflow packages (#20817)

  • Update Kubernetes library version (#18797)

  • Rename PodLauncher to PodManager (#20576)

  • Removes Python 3.6 support (#20467)

  • Add deprecation warning for non-json-serializable params (#20174)

  • Rename TaskMixin to DependencyMixin (#20297)

  • Deprecate passing execution_date to XCom methods (#19825)

  • Remove get_readable_dags and get_editable_dags, and get_accessible_dags. (#19961)

  • Remove postgres 9.6 support (#19987)

  • Removed hardcoded connection types. Check if hook is instance of DbApiHook. (#19639)

  • add kubernetes 1.21 support (#19557)

  • Add FAB base class and set import_name explicitly. (#19667)

  • Removes unused state transitions to handle auto-changing view permissions. (#19153)

  • Chore: Use enum for __var and __type members (#19303)

  • Use fab models (#19121)

  • Consolidate method names between Airflow Security Manager and FAB default (#18726)

  • Remove distutils usages for Python 3.10 (#19064)

  • Removing redundant max_tis_per_query initialisation on SchedulerJob (#19020)

  • Remove deprecated usage of init_role() from API (#18820)

  • Remove duplicate code on dbapi hook (#18821)

Airflow 2.2.5, (2022-04-04)

Significant Changes

No significant changes.

Bug Fixes

  • Check and disallow a relative path for sqlite (#22530)

  • Fixed dask executor and tests (#22027)

  • Fix broken links to celery documentation (#22364)

  • Fix incorrect data provided to tries & landing times charts (#21928)

  • Fix assignment of unassigned triggers (#21770)

  • Fix triggerer --capacity parameter (#21753)

  • Fix graph auto-refresh on page load (#21736)

  • Fix filesystem sensor for directories (#21729)

  • Fix stray order_by(TaskInstance.execution_date) (#21705)

  • Correctly handle multiple ‘=’ in LocalFileSystem secrets. (#21694)

  • Log exception in local executor (#21667)

  • Disable default_pool delete on web ui (#21658)

  • Extends typing-extensions to be installed with python 3.8+ #21566 (#21567)

  • Dispose unused connection pool (#21565)

  • Fix logging JDBC SQL error when task fails (#21540)

  • Filter out default configs when overrides exist. (#21539)

  • Fix Resources __eq__ check (#21442)

  • Fix max_active_runs=1 not scheduling runs when min_file_process_interval is high (#21413)

  • Reduce DB load incurred by Stale DAG deactivation (#21399)

  • Fix race condition between triggerer and scheduler (#21316)

  • Fix trigger dag redirect from task instance log view (#21239)

  • Log traceback in trigger exceptions (#21213)

  • A trigger might use a connection; make sure we mask passwords (#21207)

  • Update ExternalTaskSensorLink to handle templated external_dag_id (#21192)

  • Ensure clear_task_instances sets valid run state (#21116)

  • Fix: Update custom connection field processing (#20883)

  • Truncate stack trace to DAG user code for exceptions raised during execution (#20731)

  • Fix duplicate trigger creation race condition (#20699)

  • Fix Tasks getting stuck in scheduled state (#19747)

  • Fix: Do not render undefined graph edges (#19684)

  • Set X-Frame-Options header to DENY only if X_FRAME_ENABLED is set to true. (#19491)

Doc only changes

  • adding on_execute_callback to callbacks docs (#22362)

  • Add documentation on specifying a DB schema. (#22347)

  • Fix postgres part of pipeline example of tutorial (#21586)

  • Extend documentation for states of DAGs & tasks and update trigger rules docs (#21382)

  • DB upgrade is required when updating Airflow (#22061)

  • Remove misleading MSSQL information from the docs (#21998)


  • Add the new Airflow Trove Classifier to setup.cfg (#22241)

  • Rename to_delete to to_cancel in TriggerRunner (#20658)

  • Update Flask-AppBuilder to 3.4.5 (#22596)

Airflow 2.2.4, (2022-02-22)

Significant Changes

Smart sensors deprecated

Smart sensors, an “early access” feature added in Airflow 2, are now deprecated and will be removed in Airflow 2.4.0. They have been superseded by Deferrable Operators, added in Airflow 2.2.0.

See Migrating to Deferrable Operators for details on how to migrate.

Bug Fixes

  • Adding missing login provider related methods from Flask-Appbuilder (#21294)

  • Fix slow DAG deletion due to missing dag_id index for job table (#20282)

  • Add a session backend to store session data in the database (#21478)

  • Show task status only for running dags or only for the last finished dag (#21352)

  • Use compat data interval shim in log handlers (#21289)

  • Fix mismatch in generated run_id and logical date of DAG run (#18707)

  • Fix TriggerDagRunOperator extra link (#19410)

  • Add possibility to create user in the Remote User mode (#19963)

  • Avoid deadlock when rescheduling task (#21362)

  • Fix the incorrect scheduling time for the first run of dag (#21011)

  • Fix Scheduler crash when executing task instances of missing DAG (#20349)

  • Deferred tasks does not cancel when DAG is marked fail (#20649)

  • Removed duplicated dag_run join in Dag.get_task_instances() (#20591)

  • Avoid unintentional data loss when deleting DAGs (#20758)

  • Fix session usage in /rendered-k8s view (#21006)

  • Fix airflow dags backfill --reset-dagruns errors when run twice (#21062)

  • Do not set TaskInstance.max_tries in refresh_from_task (#21018)

  • Don’t require dag_id in body in dagrun REST API endpoint (#21024)

  • Add Roles from Azure OAUTH Response in internal Security Manager (#20707)

  • Allow Viewing DagRuns and TIs if a user has DAG “read” perms (#20663)

  • Fix running airflow dags test <dag_id> <execution_dt> results in error when run twice (#21031)

  • Switch to non-vendored latest connexion library (#20910)

  • Bump flask-appbuilder to >=3.3.4 (#20628)

  • upgrade celery to 5.2.3 (#19703)

  • Bump croniter from <1.1 to <1.2 (#20489)

  • Avoid calling DAG.following_schedule() for TaskInstance.get_template_context() (#20486)

  • Fix(standalone): Remove hardcoded Webserver port (#20429)

  • Remove unnecessary logging in experimental API (#20356)

  • Un-ignore DeprecationWarning (#20322)

  • Deepcopying Kubernetes Secrets attributes causing issues (#20318)

  • Fix(dag-dependencies): fix arrow styling (#20303)

  • Adds retry on taskinstance retrieval lock (#20030)

  • Correctly send timing metrics when using dogstatsd (fix schedule_delay metric) (#19973)

  • Enhance multiple_outputs inference of dict typing (#19608)

  • Fixing Amazon SES email backend (#18042)

  • Pin MarkupSafe until we are able to upgrade Flask/Jinja (#21664)

Doc only changes

  • Added explaining concept of logical date in DAG run docs (#21433)

  • Add note about Variable precedence with env vars (#21568)

  • Update error docs to include before_send option (#21275)

  • Augment xcom docs (#20755)

  • Add documentation and release policy on “latest” constraints (#21093)

  • Add a link to the DAG model in the Python API reference (#21060)

  • Added an enum param example (#20841)

  • Compare taskgroup and subdag (#20700)

  • Add note about reserved params keyword (#20640)

  • Improve documentation on Params (#20567)

  • Fix typo in MySQL Database creation code (Set up DB docs) (#20102)

  • Add requirements.txt description (#20048)

  • Clean up default_args usage in docs (#19803)

  • Add docker-compose explanation to conn localhost (#19076)

  • Update CSV ingest code for tutorial (#18960)

  • Adds Pendulum 1.x -> 2.x upgrade documentation (#18955)

  • Clean up dynamic start_date values from docs (#19607)

  • Docs for multiple pool slots (#20257)

  • Update upgrading.rst with detailed code example of how to resolve post-upgrade warning (#19993)


  • Deprecate some functions in the experimental API (#19931)

  • Deprecate smart sensors (#20151)

Airflow 2.2.3, (2021-12-21)

Significant Changes

No significant changes.

Bug Fixes

  • Lazy Jinja2 context (#20217)

  • Exclude snowflake-sqlalchemy v1.2.5 (#20245)

  • Move away from legacy importlib.resources API (#19091)

  • Move setgid as the first command executed in forked task runner (#20040)

  • Fix race condition when starting DagProcessorAgent (#19935)

  • Limit httpx to <0.20.0 (#20218)

  • Log provider import errors as debug warnings (#20172)

  • Bump minimum required alembic version (#20153)

  • Fix log link in gantt view (#20121)

  • fixing #19028 by moving chown to use sudo (#20114)

  • Lift off upper bound for MarkupSafe (#20113)

  • Fix infinite recursion on redact log (#20039)

  • Fix db downgrades (#19994)

  • Context class handles deprecation (#19886)

  • Fix possible reference to undeclared variable (#19933)

  • Validate DagRun state is valid on assignment (#19898)

  • Workaround occasional deadlocks with MSSQL (#19856)

  • Enable task run setting to be able reinitialize (#19845)

  • Fix log endpoint for same task (#19672)

  • Cast macro datetime string inputs explicitly (#19592)

  • Do not crash with stacktrace when task instance is missing (#19478)

  • Fix log timezone in task log view (#19342) (#19401)

  • Fix: Add taskgroup tooltip to graph view (#19083)

  • Rename execution date in forms and tables (#19063)

  • Simplify “invalid TI state” message (#19029)

  • Handle case of nonexistent file when preparing file path queue (#18998)

  • Do not create dagruns for DAGs with import errors (#19367)

  • Fix field relabeling when switching between conn types (#19411)

  • KubernetesExecutor should default to template image if used (#19484)

  • Fix task instance api cannot list task instances with None state (#19487)

  • Fix IntegrityError in DagFileProcessor.manage_slas (#19553)

  • Declare data interval fields as serializable (#19616)

  • Relax timetable class validation (#19878)

  • Fix labels used to find queued KubernetesExecutor pods (#19904)

  • Fix moved data migration check for MySQL when replication is used (#19999)

Doc only changes

  • Warn without tracebacks when example_dags are missing deps (#20295)

  • Deferrable operators doc clarification (#20150)

  • Ensure the example DAGs are all working (#19355)

  • Updating core example DAGs to use TaskFlow API where applicable (#18562)

  • Add xcom clearing behaviour on task retries (#19968)

  • Add a short chapter focusing on adapting secret format for connections (#19859)

  • Add information about supported OS-es for Apache Airflow (#19855)

  • Update docs to reflect that changes to the base_log_folder require updating other configs (#19793)

  • Disclaimer in KubernetesExecutor pod template docs (#19686)

  • Add upgrade note on execution_date -> run_id (#19593)

  • Expanding .output operator property information in TaskFlow tutorial doc (#19214)

  • Add example SLA DAG (#19563)

  • Add a proper example to patch DAG (#19465)

  • Add DAG file processing description to Scheduler Concepts (#18954)

  • Updating explicit arg example in TaskFlow API tutorial doc (#18907)

  • Adds back documentation about context usage in Python/@task (#18868)

  • Add release date for when an endpoint/field is added in the REST API (#19203)

  • Better pod_template_file examples (#19691)

  • Add description on how you can customize image entrypoint (#18915)

  • Dags-in-image pod template example should not have dag mounts (#19337)

Airflow 2.2.2 (2021-11-15)

Significant Changes

No significant changes.

Bug Fixes

  • Fix bug when checking for existence of a Variable (#19395)

  • Fix Serialization when relativedelta is passed as schedule_interval (#19418)

  • Fix moving of dangling TaskInstance rows for SQL Server (#19425)

  • Fix task instance modal in gantt view (#19258)

  • Fix serialization of Params with set data type (#19267)

  • Check if job object is None before calling .is_alive() (#19380)

  • Task should fail immediately when pod is unprocessable (#19359)

  • Fix downgrade for a DB Migration (#19390)

  • Only mark SchedulerJobs as failed, not any jobs (#19375)

  • Fix message on “Mark as” confirmation page (#19363)

  • Bugfix: Check next run exists before reading data interval (#19307)

  • Fix MySQL db migration with default encoding/collation (#19268)

  • Fix hidden tooltip position (#19261)

  • sqlite_default Connection has been hard-coded to /tmp, use gettempdir instead (#19255)

  • Fix Toggle Wrap on DAG code page (#19211)

  • Clarify “dag not found” error message in CLI (#19338)

  • Add Note to SLA regarding schedule_interval (#19173)

  • Use execution_date to check for existing DagRun for TriggerDagRunOperator (#18968)

  • Add explicit session parameter in PoolSlotsAvailableDep (#18875)

  • FAB still requires WTForms<3.0 (#19466)

  • Fix missing dagruns when catchup=True (#19528)

Doc only changes

  • Add missing parameter documentation for “timetable” (#19282)

  • Improve Kubernetes Executor docs (#19339)

  • Update image tag used in docker docs

Airflow 2.2.1 (2021-10-29)

Significant Changes

Param’s default value for default removed

Param, introduced in Airflow 2.2.0, accidentally set the default value to None. This default has been removed. If you want None as your default, explicitly set it as such. For example:

Param(None, type=["null", "string"])

Now if you resolve a Param without a default and don’t pass a value, you will get an TypeError. For Example:

Param().resolve()  # raises TypeError

max_queued_runs_per_dag configuration has been removed

The max_queued_runs_per_dag configuration option in [core] section has been removed. Previously, this controlled the number of queued dagrun the scheduler can create in a dag. Now, the maximum number is controlled internally by the DAG’s max_active_runs

Bug Fixes

  • Fix Unexpected commit error in SchedulerJob (#19213)

  • Add DagRun.logical_date as a property (#19198)

  • Clear ti.next_method and ti.next_kwargs on task finish (#19183)

  • Faster PostgreSQL db migration to Airflow 2.2 (#19166)

  • Remove incorrect type comment in Swagger2Specification._set_defaults classmethod (#19065)

  • Add TriggererJob to jobs check command (#19179, #19185)

  • Hide tooltip when next run is None (#19112)

  • Create TI context with data interval compat layer (#19148)

  • Fix queued dag runs changes catchup=False behaviour (#19130, #19145)

  • add detailed information to logging when a dag or a task finishes. (#19097)

  • Warn about unsupported Python 3.10 (#19060)

  • Fix catchup by limiting queued dagrun creation using max_active_runs (#18897)

  • Prevent scheduler crash when serialized dag is missing (#19113)

  • Don’t install SQLAlchemy/Pendulum adapters for other DBs (#18745)

  • Workaround libstdcpp TLS error (#19010)

  • Change ds, ts, etc. back to use logical date (#19088)

  • Ensure task state doesn’t change when marked as failed/success/skipped (#19095)

  • Relax packaging requirement (#19087)

  • Rename trigger page label to Logical Date (#19061)

  • Allow Param to support a default value of None (#19034)

  • Upgrade old DAG/task param format when deserializing from the DB (#18986)

  • Don’t bake ENV and _cmd into tmp config for non-sudo (#18772)

  • CLI: Fail backfill command before loading DAGs if missing args (#18994)

  • BugFix: Null execution date on insert to task_fail violating NOT NULL (#18979)

  • Try to move “dangling” rows in db upgrade (#18953)

  • Row lock TI query in SchedulerJob._process_executor_events (#18975)

  • Sentry before send fallback (#18980)

  • Fix XCom.delete error in Airflow 2.2.0 (#18956)

  • Check python version before starting triggerer (#18926)

Doc only changes

  • Update access control documentation for TaskInstances and DagRuns (#18644)

  • Add information about keepalives for managed Postgres (#18850)

  • Doc: Add Callbacks Section to Logging & Monitoring (#18842)

  • Group PATCH DAGrun together with other DAGRun endpoints (#18885)

Airflow 2.2.0 (2021-10-11)

Significant Changes

Note: Upgrading the database to 2.2.0 or later can take some time to complete, particularly if you have a large task_instance table.

worker_log_server_port configuration has been moved to the logging section.

The worker_log_server_port configuration option has been moved from [celery] section to [logging] section to allow for reuse between different executors.

pandas is now an optional dependency

Previously pandas was a core requirement so when you run pip install apache-airflow it looked for pandas library and installed it if it does not exist.

If you want to install pandas compatible with Airflow, you can use [pandas] extra while installing Airflow, example for Python 3.8 and Airflow 2.1.2:

pip install -U "apache-airflow[pandas]==2.1.2" \

none_failed_or_skipped trigger rule has been deprecated

TriggerRule.NONE_FAILED_OR_SKIPPED is replaced by TriggerRule.NONE_FAILED_MIN_ONE_SUCCESS. This is only name change, no functionality changes made. This change is backward compatible however TriggerRule.NONE_FAILED_OR_SKIPPED will be removed in next major release.

Dummy trigger rule has been deprecated

TriggerRule.DUMMY is replaced by TriggerRule.ALWAYS. This is only name change, no functionality changes made. This change is backward compatible however TriggerRule.DUMMY will be removed in next major release.

DAG concurrency settings have been renamed

[core] dag_concurrency setting in airflow.cfg has been renamed to [core] max_active_tasks_per_dag for better understanding.

It is the maximum number of task instances allowed to run concurrently in each DAG. To calculate the number of tasks that is running concurrently for a DAG, add up the number of running tasks for all DAG runs of the DAG.

This is configurable at the DAG level with max_active_tasks and a default can be set in airflow.cfg as [core] max_active_tasks_per_dag.


dag_concurrency = 16


max_active_tasks_per_dag = 16

Similarly, DAG.concurrency has been renamed to DAG.max_active_tasks.


dag = DAG(
    start_date=datetime(2021, 1, 1),


dag = DAG(
    start_date=datetime(2021, 1, 1),

If you are using DAGs Details API endpoint, use max_active_tasks instead of concurrency.

Task concurrency parameter has been renamed

BaseOperator.task_concurrency has been deprecated and renamed to max_active_tis_per_dag for better understanding.

This parameter controls the number of concurrent running task instances across dag_runs per task.


with DAG(dag_id="task_concurrency_example"):
    BashOperator(task_id="t1", task_concurrency=2, bash_command="echo Hi")


with DAG(dag_id="task_concurrency_example"):
    BashOperator(task_id="t1", max_active_tis_per_dag=2, bash_command="echo Hi")

processor_poll_interval config have been renamed to scheduler_idle_sleep_time

[scheduler] processor_poll_interval setting in airflow.cfg has been renamed to [scheduler] scheduler_idle_sleep_time for better understanding.

It controls the ‘time to sleep’ at the end of the Scheduler loop if nothing was scheduled inside SchedulerJob.


processor_poll_interval = 16


scheduler_idle_sleep_time = 16

Marking success/failed automatically clears failed downstream tasks

When marking a task success/failed in Graph View, its downstream tasks that are in failed/upstream_failed state are automatically cleared.

[core] store_dag_code has been removed

While DAG Serialization is a strict requirements since Airflow 2, we allowed users to control where the Webserver looked for when showing the Code View.

If [core] store_dag_code was set to True, the Scheduler stored the code in the DAG file in the DB (in dag_code table) as a plain string, and the webserver just read it from the same table. If the value was set to False, the webserver read it from the DAG file.

While this setting made sense for Airflow < 2, it caused some confusion to some users where they thought this setting controlled DAG Serialization.

From Airflow 2.2, Airflow will only look for DB when a user clicks on Code View for a DAG.

Clearing a running task sets its state to RESTARTING

Previously, clearing a running task sets its state to SHUTDOWN. The task gets killed and goes into FAILED state. After #16681, clearing a running task sets its state to RESTARTING. The task is eligible for retry without going into FAILED state.

Remove TaskInstance.log_filepath attribute

This method returned incorrect values for a long time, because it did not take into account the different logger configuration and task retries. We have also started supporting more advanced tools that don’t use files, so it is impossible to determine the correct file path in every case e.g. Stackdriver doesn’t use files but identifies logs based on labels. For this reason, we decided to delete this attribute.

If you need to read logs, you can use airflow.utils.log.log_reader.TaskLogReader class, which does not have the above restrictions.

If a sensor times out, it will not retry

Previously, a sensor is retried when it times out until the number of retries are exhausted. So the effective timeout of a sensor is timeout * (retries + 1). This behaviour is now changed. A sensor will immediately fail without retrying if timeout is reached. If it’s desirable to let the sensor continue running for longer time, set a larger timeout instead.

Default Task Pools Slots can be set using [core] default_pool_task_slot_count

By default tasks are running in default_pool. default_pool is initialized with 128 slots and user can change the number of slots through UI/CLI/API for an existing deployment.

For new deployments, you can use default_pool_task_slot_count setting in [core] section. This setting would not have any effect in an existing deployment where the default_pool already exists.

Previously this was controlled by non_pooled_task_slot_count in [core] section, which was not documented.

Webserver DAG refresh buttons removed

Now that the DAG parser syncs DAG permissions there is no longer a need for manually refreshing DAGs. As such, the buttons to refresh a DAG have been removed from the UI.

In addition, the /refresh and /refresh_all webserver endpoints have also been removed.

TaskInstances now require a DagRun

Under normal operation every TaskInstance row in the database would have DagRun row too, but it was possible to manually delete the DagRun and Airflow would still schedule the TaskInstances.

In Airflow 2.2 we have changed this and now there is a database-level foreign key constraint ensuring that every TaskInstance has a DagRun row.

Before updating to this 2.2 release you will have to manually resolve any inconsistencies (add back DagRun rows, or delete TaskInstances) if you have any “dangling” TaskInstance” rows.

As part of this change the clean_tis_without_dagrun_interval config option under [scheduler] section has been removed and has no effect.

TaskInstance and TaskReschedule now define run_id instead of execution_date

As a part of the TaskInstance-DagRun relation change, the execution_date columns on TaskInstance and TaskReschedule have been removed from the database, and replaced by association proxy fields at the ORM level. If you access Airflow’s metadatabase directly, you should rewrite the implementation to use the run_id columns instead.

Note that Airflow’s metadatabase definition on both the database and ORM levels are considered implementation detail without strict backward compatibility guarantees.

DaskExecutor - Dask Worker Resources and queues

If dask workers are not started with complementary resources to match the specified queues, it will now result in an AirflowException, whereas before it would have just ignored the queue argument.

Logical date of a DAG run triggered from the web UI now have its sub-second component set to zero

Due to a change in how the logical date (execution_date) is generated for a manual DAG run, a manual DAG run’s logical date may not match its time-of-trigger, but have its sub-second part zero-ed out. For example, a DAG run triggered on 2021-10-11T12:34:56.78901 would have its logical date set to 2021-10-11T12:34:56.00000.

This may affect some logic that expects on this quirk to detect whether a run is triggered manually or not. Note that dag_run.run_type is a more authoritative value for this purpose. Also, if you need this distinction between automated and manually-triggered run for “next execution date” calculation, please also consider using the new data interval variables instead, which provide a more consistent behavior between the two run types.

New Features

  • AIP-39: Add (customizable) Timetable class to Airflow for richer scheduling behaviour (#15397, #16030, #16352, #17030, #17122, #17414, #17552, #17755, #17989, #18084, #18088, #18244, #18266, #18420, #18434, #18421, #18475, #18499, #18573, #18522, #18729, #18706, #18742, #18786, #18804)

  • AIP-40: Add Deferrable “Async” Tasks (#15389, #17564, #17565, #17601, #17745, #17747, #17748, #17875, #17876, #18129, #18210, #18214, #18552, #18728, #18414)

  • Add a Docker Taskflow decorator (#15330, #18739)

  • Add Airflow Standalone command (#15826)

  • Display alert messages on dashboard from local settings (#18284)

  • Advanced Params using json-schema (#17100)

  • Ability to test connections from UI or API (#15795, #18750)

  • Add Next Run to UI (#17732)

  • Add default weight rule configuration option (#18627)

  • Add a calendar field to choose the execution date of the DAG when triggering it (#16141)

  • Allow setting specific cwd for BashOperator (#17751)

  • Show import errors in DAG views (#17818)

  • Add pre/post execution hooks [Experimental] (#17576)

  • Added table to view providers in Airflow ui under admin tab (#15385)

  • Adds secrets backend/logging/auth information to provider yaml (#17625)

  • Add date format filters to Jinja environment (#17451)

  • Introduce RESTARTING state (#16681)

  • Webserver: Unpause DAG on manual trigger (#16569)

  • API endpoint to create new user (#16609)

  • Add insert_args for support transfer replace (#15825)

  • Add recursive flag to glob in filesystem sensor (#16894)

  • Add conn to jinja template context (#16686)

  • Add default_args for TaskGroup (#16557)

  • Allow adding duplicate connections from UI (#15574)

  • Allow specifying multiple URLs via the CORS config option (#17941)

  • Implement API endpoint for DAG deletion (#17980)

  • Add DAG run endpoint for marking a dagrun success or failed(#17839)

  • Add support for kinit options [-f|-F] and [-a|-A] (#17816)

  • Queue support for DaskExecutor using Dask Worker Resources (#16829, #18720)

  • Make auto refresh interval configurable (#18107)


  • Small improvements for Airflow UI (#18715, #18795)

  • Rename processor_poll_interval to scheduler_idle_sleep_time (#18704)

  • Check the allowed values for the logging level (#18651)

  • Fix error on triggering a dag that doesn’t exist using dagrun_conf (#18655)

  • Add muldelete action to TaskInstanceModelView (#18438)

  • Avoid importing DAGs during clean DB installation (#18450)

  • Require can_edit on DAG privileges to modify TaskInstances and DagRuns (#16634)

  • Make Kubernetes job description fit on one log line (#18377)

  • Always draw borders if task instance state is null or undefined (#18033)

  • Inclusive Language (#18349)

  • Improved log handling for zombie tasks (#18277)

  • Adding Variable.update method and improving detection of variable key collisions (#18159)

  • Add note about params on trigger DAG page (#18166)

  • Change TaskInstance and TaskReschedule PK from execution_date to run_id (#17719)

  • Adding TaskGroup support in BaseOperator.chain() (#17456)

  • Allow filtering DAGS by tags in the REST API (#18090)

  • Optimize imports of Providers Manager (#18052)

  • Adds capability of Warnings for incompatible community providers (#18020)

  • Serialize the template_ext attribute to show it in UI (#17985)

  • Add robots.txt and X-Robots-Tag header (#17946)

  • Refactor BranchDayOfWeekOperator, DayOfWeekSensor (#17940)

  • Update error message to guide the user into self-help mostly (#17929)

  • Update to Celery 5 (#17397)

  • Add links to provider’s documentation (#17736)

  • Remove Marshmallow schema warnings (#17753)

  • Rename none_failed_or_skipped by none_failed_min_one_success trigger rule (#17683)

  • Remove [core] store_dag_code & use DB to get Dag Code (#16342)

  • Rename task_concurrency to max_active_tis_per_dag (#17708)

  • Import Hooks lazily individually in providers manager (#17682)

  • Adding support for multiple task-ids in the external task sensor (#17339)

  • Replace execution_date with run_id in airflow tasks run command (#16666)

  • Make output from users cli command more consistent (#17642)

  • Open relative extra links in place (#17477)

  • Move worker_log_server_port option to the logging section (#17621)

  • Use gunicorn to serve logs generated by worker (#17591)

  • Improve validation of Group id (#17578)

  • Simplify 404 page (#17501)

  • Add XCom.clear so it’s hookable in custom XCom backend (#17405)

  • Add deprecation notice for SubDagOperator (#17488)

  • Support DAGS folder being in different location on scheduler and runners (#16860)

  • Remove /dagrun/create and disable edit form generated by F.A.B (#17376)

  • Enable specifying dictionary paths in template_fields_renderers (#17321)

  • error early if virtualenv is missing (#15788)

  • Handle connection parameters added to Extra and custom fields (#17269)

  • Fix airflow celery stop to accept the pid file. (#17278)

  • Remove DAG refresh buttons (#17263)

  • Deprecate dummy trigger rule in favor of always (#17144)

  • Be verbose about failure to import airflow_local_settings (#17195)

  • Include exit code in AirflowException str when BashOperator fails. (#17151)

  • Adding EdgeModifier support for chain() (#17099)

  • Only allows supported field types to be used in custom connections (#17194)

  • Secrets backend failover (#16404)

  • Warn on Webserver when using SQLite or SequentialExecutor (#17133)

  • Extend init_containers defined in pod_override (#17537)

  • Client-side filter dag dependencies (#16253)

  • Improve executor validation in CLI (#17071)

  • Prevent running airflow db init/upgrade migrations and setup in parallel. (#17078)

  • Update chain() and cross_downstream() to support XComArgs (#16732)

  • Improve graph view refresh (#16696)

  • When a task instance fails with exception, log it (#16805)

  • Set process title for serve-logs and LocalExecutor (#16644)

  • Rename test_cycle to check_cycle (#16617)

  • Add schema as DbApiHook instance attribute (#16521, #17423)

  • Improve compatibility with MSSQL (#9973)

  • Add transparency for unsupported connection type (#16220)

  • Call resource based fab methods (#16190)

  • Format more dates with timezone (#16129)

  • Replace deprecated dag.sub_dag with dag.partial_subset (#16179)

  • Treat AirflowSensorTimeout as immediate failure without retrying (#12058)

  • Marking success/failed automatically clears failed downstream tasks (#13037)

  • Add close/open indicator for import dag errors (#16073)

  • Add collapsible import errors (#16072)

  • Always return a response in TI’s action_clear view (#15980)

  • Add cli command to delete user by email (#15873)

  • Use resource and action names for FAB permissions (#16410)

  • Rename DAG concurrency ([core] dag_concurrency) settings for easier understanding (#16267, #18730)

  • Calendar UI improvements (#16226)

  • Refactor: SKIPPED should not be logged again as SUCCESS (#14822)

  • Remove version limits for dnspython (#18046, #18162)

  • Accept custom run ID in TriggerDagRunOperator (#18788)

Bug Fixes

  • Make REST API patch user endpoint work the same way as the UI (#18757)

  • Properly set start_date for cleared tasks (#18708)

  • Ensure task_instance exists before running update on its state(REST API) (#18642)

  • Make AirflowDateTimePickerWidget a required field (#18602)

  • Retry deadlocked transactions on deleting old rendered task fields (#18616)

  • Fix retry_exponential_backoff divide by zero error when retry delay is zero (#17003)

  • Improve how UI handles datetimes (#18611, #18700)

  • Bugfix: dag_bag.get_dag should return None, not raise exception (#18554)

  • Only show the task modal if it is a valid instance (#18570)

  • Fix accessing rendered {{ task.x }} attributes from within templates (#18516)

  • Add missing email type of connection (#18502)

  • Don’t use flash for “same-page” UI messages. (#18462)

  • Fix task group tooltip (#18406)

  • Properly fix dagrun update state endpoint (#18370)

  • Properly handle ti state difference between executor and scheduler (#17819)

  • Fix stuck “queued” tasks in KubernetesExecutor (#18152)

  • Don’t permanently add zip DAGs to sys.path (#18384)

  • Fix random deadlocks in MSSQL database (#18362)

  • Deactivating DAGs which have been removed from files (#17121)

  • When syncing dags to db remove dag_tag rows that are now unused (#8231)

  • Graceful scheduler shutdown on error (#18092)

  • Fix mini scheduler not respecting wait_for_downstream dep (#18338)

  • Pass exception to run_finished_callback for Debug Executor (#17983)

  • Make XCom.get_one return full, not abbreviated values (#18274)

  • Use try/except when closing temporary file in task_runner (#18269)

  • show next run if not none (#18273)

  • Fix DB session handling in XCom.set (#18240)

  • Fix external_executor_id not being set for manually run jobs (#17207)

  • Fix deleting of zipped Dags in Serialized Dag Table (#18243)

  • Return explicit error on user-add for duplicated email (#18224)

  • Remove loading dots even when last run data is empty (#18230)

  • Swap dag import error dropdown icons (#18207)

  • Automatically create section when migrating config (#16814)

  • Set encoding to utf-8 by default while reading task logs (#17965)

  • Apply parent dag permissions to subdags (#18160)

  • Change id collation for MySQL to case-sensitive (#18072)

  • Logs task launch exception in StandardTaskRunner (#17967)

  • Applied permissions to self._error_file (#15947)

  • Fix blank dag dependencies view (#17990)

  • Add missing menu access for dag dependencies and configurations pages (#17450)

  • Fix passing Jinja templates in DateTimeSensor (#17959)

  • Fixing bug which restricted the visibility of ImportErrors (#17924)

  • Fix grammar in traceback.html (#17942)

  • Fix DagRunState enum query for MySQLdb driver (#17886)

  • Fixed button size in “Actions” group. (#17902)

  • Only show import errors for DAGs a user can access (#17835)

  • Show all import_errors from zip files (#17759)

  • fix EXTRA_LOGGER_NAMES param and related docs (#17808)

  • Use one interpreter for Airflow and gunicorn (#17805)

  • Fix: Mysql 5.7 id utf8mb3 (#14535)

  • Fix dag_processing.last_duration metric random holes (#17769)

  • Automatically use utf8mb3_general_ci collation for MySQL (#17729)

  • fix: filter condition of TaskInstance does not work #17535 (#17548)

  • Dont use TaskInstance in CeleryExecutor.trigger_tasks (#16248)

  • Remove locks for upgrades in MSSQL (#17213)

  • Create virtualenv via python call (#17156)

  • Ensure a DAG is acyclic when running DAG.cli() (#17105)

  • Translate non-ascii characters (#17057)

  • Change the logic of None comparison in model_list template (#16893)

  • Have UI and POST /task_instances_state API endpoint have same behaviour (#16539)

  • ensure task is skipped if missing sla (#16719)

  • Fix direct use of cached_property module (#16710)

  • Fix TI success confirm page (#16650)

  • Modify return value check in python virtualenv jinja template (#16049)

  • Fix dag dependency search (#15924)

  • Make custom JSON encoder support Decimal (#16383)

  • Bugfix: Allow clearing tasks with just dag_id and empty subdir (#16513)

  • Convert port value to a number before calling test connection (#16497)

  • Handle missing/null serialized DAG dependencies (#16393)

  • Correctly set dag.fileloc when using the @dag decorator (#16384)

  • Fix TI success/failure links (#16233)

  • Correctly implement autocomplete early return in airflow/www/ (#15940)

  • Backport fix to allow pickling of Loggers to Python 3.6 (#18798)

  • Fix bug that Backfill job fail to run when there are tasks run into reschedule state (#17305, #18806)

Doc only changes

  • Update dagbag_size documentation (#18824)

  • Update documentation about bundle extras (#18828)

  • Fix wrong Postgres search_path set up instructions (#17600)

  • Remove AIRFLOW_GID from Docker images (#18747)

  • Improve error message for BranchPythonOperator when no task_id to follow (#18471)

  • Improve guidance to users telling them what to do on import timeout (#18478)

  • Explain scheduler fine-tuning better (#18356)

  • Added example JSON for airflow pools import (#18376)

  • Add sla_miss_callback section to the documentation (#18305)

  • Explain sentry default environment variable for subprocess hook (#18346)

  • Refactor installation pages (#18282)

  • Improves quick-start docker-compose warnings and documentation (#18164)

  • Production-level support for MSSQL (#18382)

  • Update non-working example in documentation (#18067)

  • Remove default_args pattern + added get_current_context() use for Core Airflow example DAGs (#16866)

  • Update max_tis_per_query to better render on the webpage (#17971)

  • Adds Github Oauth example with team based authorization (#17896)

  • Update docker.rst (#17882)

  • Example xcom update (#17749)

  • Add doc warning about connections added via env vars (#17915)

  • fix wrong documents around upgrade-check.rst (#17903)

  • Add Brent to Committers list (#17873)

  • Improves documentation about modules management (#17757)

  • Remove deprecated metrics from metrics.rst (#17772)

  • Make sure “production-readiness” of docker-compose is well explained (#17731)

  • Doc: Update Upgrade to v2 docs with Airflow 1.10.x EOL dates (#17710)

  • Doc: Replace deprecated param from docstrings (#17709)

  • Describe dag owner more carefully (#17699)

  • Update note so avoid misinterpretation (#17701)

  • Docs: Make DAG.is_active read-only in API (#17667)

  • Update documentation regarding Python 3.9 support (#17611)

  • Fix MySQL database character set instruction (#17603)

  • Document overriding XCom.clear for data lifecycle management (#17589)

  • Path correction in docs for airflow core (#17567)

  • docs(celery): reworded, add actual multiple queues example (#17541)

  • Doc: Add FAQ to speed up parsing with tons of dag files (#17519)

  • Improve image building documentation for new users (#17409)

  • Doc: Strip unnecessary arguments from MariaDB JIRA URL (#17296)

  • Update warning about MariaDB and multiple schedulers (#17287)

  • Doc: Recommend using same configs on all Airflow components (#17146)

  • Move docs about masking to a new page (#17007)

  • Suggest use of Env vars instead of Airflow Vars in best practices doc (#16926)

  • Docs: Better description for pod_template_file (#16861)

  • Add Aneesh Joseph as Airflow Committer (#16835)

  • Docs: Added new pipeline example for the tutorial docs (#16548)

  • Remove upstart from docs (#16672)

  • Add new committers: Jed and TP (#16671)

  • Docs: Fix flask-ouathlib to flask-oauthlib in Upgrading docs (#16320)

  • Docs: Fix creating a connection docs (#16312)

  • Docs: Fix url for Elasticsearch (#16275)

  • Small improvements for files (#16244)

  • Fix docs for dag_concurrency (#16177)

  • Check syntactic correctness for code-snippets (#16005)

  • Add proper link for wheel packages in docs. (#15999)

  • Add Docs for default_pool slots (#15997)

  • Add memory usage warning in quick-start documentation (#15967)

  • Update example KubernetesExecutor git-sync pod template file (#15904)

  • Docs: Fix Taskflow API docs (#16574)

  • Added new pipeline example for the tutorial docs (#16084)

  • Updating the DAG docstring to include render_template_as_native_obj (#16534)

  • Update docs on setting up SMTP (#16523)

  • Docs: Fix API verb from POST to PATCH (#16511)


  • Renaming variables to be consistent with code logic (#18685)

  • Simplify strings previously split across lines (#18679)

  • fix exception string of BranchPythonOperator (#18623)

  • Add multiple roles when creating users (#18617)

  • Move FABs base Security Manager into Airflow. (#16647)

  • Remove unnecessary css state colors (#18461)

  • Update boto3 to <1.19 (#18389)

  • Improve coverage for module (#18258)

  • Fix Amazon Kinesis test (#18337)

  • Fix provider test accessing importlib-resources (#18228)

  • Silence warnings in tests from using SubDagOperator (#18275)

  • Fix usage of range(len()) to enumerate (#18174)

  • Test coverage on the autocomplete view (#15943)

  • Add “packaging” to core requirements (#18122)

  • Adds LoggingMixins to BaseTrigger (#18106)

  • Fix building docs in main builds (#18035)

  • Remove upper-limit on tenacity (#17593)

  • Remove redundant numpy dependency (#17594)

  • Bump mysql-connector-python to latest version (#17596)

  • Make pandas an optional core dependency (#17575)

  • Add more typing to airflow.utils.helpers (#15582)

  • Chore: Some code cleanup in airflow/utils/ (#17090)

  • Refactor: Remove processor_factory from DAG processing (#16659)

  • Remove AbstractDagFileProcessorProcess from dag processing (#16816)

  • Update TaskGroup typing (#16811)

  • Update click to 8.x (#16779)

  • Remove remaining Pylint disables (#16760)

  • Remove duplicated try, there is already a try in create_session (#16701)

  • Removes pylint from our toolchain (#16682)

  • Refactor usage of unneeded function call (#16653)

  • Add type annotations to (#16658)

  • Remove SQLAlchemy <1.4 constraint (#16630) (Note: our dependencies still have a requirement on <1.4)

  • Refactor dag.clear method (#16086)

  • Use DAG_ACTIONS constant (#16232)

  • Use updated _get_all_non_dag_permissions method (#16317)

  • Add updated-name wrappers for built-in FAB methods (#16077)

  • Remove TaskInstance.log_filepath attribute (#15217)

  • Removes unnecessary function call in airflow/www/ (#15956)

  • Move plyvel to google provider extra (#15812)

  • Update permission migrations to use new naming scheme (#16400)

  • Use resource and action names for FAB (#16380)

  • Swap out calls to find_permission_view_menu for get_permission wrapper (#16377)

  • Fix deprecated default for fab_logging_level to WARNING (#18783)

  • Allow running tasks from UI when using CeleryKubernetesExecutor (#18441)

Airflow 2.1.4 (2021-09-18)

Significant Changes

No significant changes.

Bug Fixes

  • Fix deprecation error message rather than silencing it (#18126)

  • Limit the number of queued dagruns created by the Scheduler (#18065)

  • Fix DagRun execution order from queued to running not being properly followed (#18061)

  • Fix max_active_runs not allowing moving of queued dagruns to running (#17945)

  • Avoid redirect loop for users with no permissions (#17838)

  • Avoid endless redirect loop when user has no roles (#17613)

  • Fix log links on graph TI modal (#17862)

  • Hide variable import form if user lacks permission (#18000)

  • Improve dag/task concurrency check (#17786)

  • Fix Clear task instances endpoint resets all DAG runs bug (#17961)

  • Fixes incorrect parameter passed to views (#18083) (#18085)

  • Fix Sentry handler from LocalTaskJob causing error (#18119)

  • Limit colorlog version (6.x is incompatible) (#18099)

  • Only show Pause/Unpause tooltip on hover (#17957)

  • Improve graph view load time for dags with open groups (#17821)

  • Increase width for Run column (#17817)

  • Fix wrong query on running tis (#17631)

  • Add root to tree refresh url (#17633)

  • Do not delete running DAG from the UI (#17630)

  • Improve discoverability of Provider packages’ functionality

  • Do not let create_dagrun overwrite explicit run_id (#17728)

  • Regression on pid reset to allow task start after heartbeat (#17333)

  • Set task state to failed when pod is DELETED while running (#18095)

  • Advises the kernel to not cache log files generated by Airflow (#18054)

  • Sort adopted tasks in _check_for_stalled_adopted_tasks method (#18208)

Doc only changes

  • Update version added fields in airflow/config_templates/config.yml (#18128)

  • Improve the description of how to handle dynamic task generation (#17963)

  • Improve cross-links to operators and hooks references (#17622)

  • Doc: Fix replacing Airflow version for Docker stack (#17711)

  • Make the providers operators/hooks reference much more usable (#17768)

  • Update description about the new connection-types provider meta-data

  • Suggest to use secrets backend for variable when it contains sensitive data (#17319)

  • Separate Installing from sources section and add more details (#18171)

  • Doc: Use closer.lua script for downloading sources (#18179)

  • Doc: Improve installing from sources (#18194)

  • Improves installing from sources pages for all components (#18251)

Airflow 2.1.3 (2021-08-23)

Significant Changes

No significant changes.

Bug Fixes

  • Fix task retries when they receive sigkill and have retries and properly handle sigterm (#16301)

  • Fix redacting secrets in context exceptions. (#17618)

  • Fix race condition with dagrun callbacks (#16741)

  • Add ‘queued’ to DagRunState (#16854)

  • Add ‘queued’ state to DagRun (#16401)

  • Fix external elasticsearch logs link (#16357)

  • Add proper warning message when recorded PID is different from current PID (#17411)

  • Fix running tasks with default_impersonation config (#17229)

  • Rescue if a DagRun’s DAG was removed from db (#17544)

  • Fixed broken json_client (#17529)

  • Handle and log exceptions raised during task callback (#17347)

  • Fix CLI kubernetes cleanup-pods which fails on invalid label key (#17298)

  • Show serialization exceptions in DAG parsing log (#17277)

  • Fix: TaskInstance does not show queued_by_job_id & external_executor_id (#17179)

  • Adds more explanatory message when SecretsMasker is not configured (#17101)

  • Enable the use of __init_subclass__ in subclasses of BaseOperator (#17027)

  • Fix task instance retrieval in XCom view (#16923)

  • Validate type of priority_weight during parsing (#16765)

  • Correctly handle custom deps and task_group during DAG Serialization (#16734)

  • Fix slow (cleared) tasks being be adopted by Celery worker. (#16718)

  • Fix calculating duration in tree view (#16695)

  • Fix AttributeError: datetime.timezone object has no attribute name (#16599)

  • Redact conn secrets in webserver logs (#16579)

  • Change graph focus to top of view instead of center (#16484)

  • Fail tasks in scheduler when executor reports they failed (#15929)

  • fix(smart_sensor): Unbound variable errors (#14774)

  • Add back missing permissions to UserModelView controls. (#17431)

  • Better diagnostics and self-healing of docker-compose (#17484)

  • Improve diagnostics message when users have secret_key misconfigured (#17410)

  • Stop checking execution_date in task_instance.refresh_from_db (#16809)


  • Run mini scheduler in LocalTaskJob during task exit (#16289)

  • Remove SQLAlchemy<1.4 constraint (#16630)

  • Bump Jinja2 upper-bound from 2.12.0 to 4.0.0 (#16595)

  • Bump dnspython (#16698)

  • Updates to FlaskAppBuilder 3.3.2+ (#17208)

  • Add State types for tasks and DAGs (#15285)

  • Set Process title for Worker when using LocalExecutor (#16623)

  • Move DagFileProcessor and DagFileProcessorProcess out of (#16581)

Doc only changes

  • Fix inconsistencies in configuration docs (#17317)

  • Fix docs link for using SQLite as Metadata DB (#17308)


  • Switch back http provider after requests removes LGPL dependency (#16974)

Airflow 2.1.2 (2021-07-14)

Significant Changes

No significant changes.

Bug Fixes

  • Only allow webserver to request from the worker log server (#16754)

  • Fix “Invalid JSON configuration, must be a dict” bug (#16648)

  • Fix CeleryKubernetesExecutor (#16700)

  • Mask value if the key is token (#16474)

  • Fix impersonation issue with LocalTaskJob (#16852)

  • Resolve all npm vulnerabilities including bumping jQuery to 3.5 (#16440)


  • Add Python 3.9 support (#15515)

Airflow 2.1.1 (2021-07-02)

Significant Changes

activate_dag_runs argument of the function clear_task_instances is replaced with dag_run_state

To achieve the previous default behaviour of clear_task_instances with activate_dag_runs=True, no change is needed. To achieve the previous behaviour of activate_dag_runs=False, pass dag_run_state=False instead. (The previous parameter is still accepted, but is deprecated)

dag.set_dag_runs_state is deprecated

The method set_dag_runs_state is no longer needed after a bug fix in PR: #15382. This method is now deprecated and will be removed in a future version.

Bug Fixes

  • Don’t crash attempting to mask secrets in dict with non-string keys (#16601)

  • Always install sphinx_airflow_theme from PyPI (#16594)

  • Remove limitation for elasticsearch library (#16553)

  • Adding extra requirements for build and runtime of the PROD image. (#16170)

  • Cattrs 1.7.0 released by the end of May 2021 break lineage usage (#16173)

  • Removes unnecessary packages from setup_requires (#16139)

  • Pins docutils to <0.17 until breaking behaviour is fixed (#16133)

  • Improvements for Docker Image docs (#14843)

  • Ensure that dag_run.conf is a dict (#15057)

  • Fix CLI connections import and migrate logic from secrets to Connection model (#15425)

  • Fix Dag Details start date bug (#16206)

  • Fix DAG run state not updated while DAG is paused (#16343)

  • Allow null value for operator field in task_instance schema(REST API) (#16516)

  • Avoid recursion going too deep when redacting logs (#16491)

  • Backfill: Don’t create a DagRun if no tasks match task regex (#16461)

  • Tree View UI for larger DAGs & more consistent spacing in Tree View (#16522)

  • Correctly handle None returns from Query.scalar() (#16345)

  • Adding only_active parameter to /dags endpoint (#14306)

  • Don’t show stale Serialized DAGs if they are deleted in DB (#16368)

  • Make REST API List DAGs endpoint consistent with UI/CLI behaviour (#16318)

  • Support remote logging in elasticsearch with filebeat 7 (#14625)

  • Queue tasks with higher priority and earlier execution_date first. (#15210)

  • Make task ID on legend have enough width and width of line chart to be 100%. (#15915)

  • Fix normalize-url vulnerability (#16375)

  • Validate retries value on init for better errors (#16415)

  • add num_runs query param for tree refresh (#16437)

  • Fix templated default/example values in config ref docs (#16442)

  • Add passphrase and private_key to default sensitive field names (#16392)

  • Fix tasks in an infinite slots pool were never scheduled (#15247)

  • Fix Orphaned tasks stuck in CeleryExecutor as running (#16550)

  • Don’t fail to log if we can’t redact something (#16118)

  • Set max tree width to 1200 pixels (#16067)

  • Fill the “job_id” field for airflow task run without --local/--raw for KubeExecutor (#16108)

  • Fixes problem where conf variable was used before initialization (#16088)

  • Fix apply defaults for task decorator (#16085)

  • Parse recently modified files even if just parsed (#16075)

  • Ensure that we don’t try to mask empty string in logs (#16057)

  • Don’t die when masking log.exception when there is no exception (#16047)

  • Restores apply_defaults import in base_sensor_operator (#16040)

  • Fix auto-refresh in tree view When webserver ui is not in / (#16018)

  • Fix dag.clear() to set multiple dags to running when necessary (#15382)

  • Fix Celery executor getting stuck randomly because of reset_signals in multiprocessing (#15989)

Airflow 2.1.0 (2021-05-21)

Significant Changes

New “deprecated_api” extra

We have a new ‘[deprecated_api]’ extra that should be used when installing airflow when the deprecated API is going to be used. This is now an optional feature of Airflow now because it pulls in requests which (as of 14 May 2021) pulls LGPL chardet dependency.

The http provider is not installed by default

The http provider is now optional and not installed by default, until chardet becomes an optional dependency of requests. See PR to replace chardet with charset-normalizer

@apply_default decorator isn’t longer necessary

This decorator is now automatically added to all operators via the metaclass on BaseOperator

Change the configuration options for field masking

We’ve improved masking for sensitive data in Web UI and logs. As part of it, the following configurations have been changed:

  • hide_sensitive_variable_fields option in admin section has been replaced by hide_sensitive_var_conn_fields section in core section,

  • sensitive_variable_fields option in admin section has been replaced by sensitive_var_conn_names section in core section.

Deprecated PodDefaults and add_xcom_sidecar in airflow.kubernetes.pod_generator

We have moved PodDefaults from airflow.kubernetes.pod_generator.PodDefaults to airflow.providers.cncf.kubernetes.utils.xcom_sidecar.PodDefaults and moved add_xcom_sidecar from airflow.kubernetes.pod_generator.PodGenerator.add_xcom_sidecarto airflow.providers.cncf.kubernetes.utils.xcom_sidecar.add_xcom_sidecar. This change will allow us to modify the KubernetesPodOperator XCom functionality without requiring airflow upgrades.

Removed pod_launcher from core airflow

Moved the pod launcher from airflow.kubernetes.pod_launcher to airflow.providers.cncf.kubernetes.utils.pod_launcher

This will allow users to update the pod_launcher for the KubernetesPodOperator without requiring an airflow upgrade

Default [webserver] worker_refresh_interval is changed to 6000 seconds

The default value for [webserver] worker_refresh_interval was 30 seconds for Airflow <=2.0.1. However, since Airflow 2.0 DAG Serialization is a hard requirement and the Webserver used the serialized DAGs, there is no need to kill an existing worker and create a new one as frequently as 30 seconds.

This setting can be raised to an even higher value, currently it is set to 6000 seconds (100 minutes) to serve as a DagBag cache burst time.

default_queue configuration has been moved to the operators section.

The default_queue configuration option has been moved from [celery] section to [operators] section to allow for reuse between different executors.

New Features

  • Add PythonVirtualenvDecorator to Taskflow API (#14761)

  • Add Taskgroup decorator (#15034)

  • Create a DAG Calendar View (#15423)

  • Create cross-DAG dependencies view (#13199)

  • Add rest API to query for providers (#13394)

  • Mask passwords and sensitive info in task logs and UI (#15599)

  • Add SubprocessHook for running commands from operators (#13423)

  • Add DAG Timeout in UI page “DAG Details” (#14165)

  • Add WeekDayBranchOperator (#13997)

  • Add JSON linter to DAG Trigger UI (#13551)

  • Add DAG Description Doc to Trigger UI Page (#13365)

  • Add airflow webserver URL into SLA miss email. (#13249)

  • Add read only REST API endpoints for users (#14735)

  • Add files to generate Airflow’s Python SDK (#14739)

  • Add dynamic fields to snowflake connection (#14724)

  • Add read only REST API endpoint for roles and permissions (#14664)

  • Add new datetime branch operator (#11964)

  • Add Google leveldb hook and operator (#13109) (#14105)

  • Add plugins endpoint to the REST API (#14280)

  • Add worker_pod_pending_timeout support (#15263)

  • Add support for labeling DAG edges (#15142)

  • Add CUD REST API endpoints for Roles (#14840)

  • Import connections from a file (#15177)

  • A bunch of template_fields_renderers additions (#15130)

  • Add REST API query sort and order to some endpoints (#14895)

  • Add timezone context in new ui (#15096)

  • Add query mutations to new UI (#15068)

  • Add different modes to sort dag files for parsing (#15046)

  • Auto refresh on Tree View (#15474)

  • BashOperator to raise AirflowSkipException on exit code 99 (by default, configurable) (#13421) (#14963)

  • Clear tasks by task ids in REST API (#14500)

  • Support jinja2 native Python types (#14603)

  • Allow celery workers without gossip or mingle modes (#13880)

  • Add airflow jobs check CLI command to check health of jobs (Scheduler etc) (#14519)

  • Rename DateTimeBranchOperator to BranchDateTimeOperator (#14720)


  • Add optional result handler callback to DbApiHook (#15581)

  • Update Flask App Builder limit to recently released 3.3 (#15792)

  • Prevent creating flask sessions on REST API requests (#15295)

  • Sync DAG specific permissions when parsing (#15311)

  • Increase maximum length of pool name on Tasks to 256 characters (#15203)

  • Enforce READ COMMITTED isolation when using mysql (#15714)

  • Auto-apply apply_default to subclasses of BaseOperator (#15667)

  • Emit error on duplicated DAG ID (#15302)

  • Update KubernetesExecutor pod templates to allow access to IAM permissions (#15669)

  • More verbose logs when running airflow db check-migrations (#15662)

  • When one_success mark task as failed if no success (#15467)

  • Add an option to trigger a dag w/o changing conf (#15591)

  • Add Airflow UI instance_name configuration option (#10162)

  • Add a decorator to retry functions with DB transactions (#14109)

  • Add return to PythonVirtualenvOperator’s execute method (#14061)

  • Add verify_ssl config for kubernetes (#13516)

  • Add description about secret_key when Webserver > 1 (#15546)

  • Add Traceback in LogRecord in JSONFormatter (#15414)

  • Add support for arbitrary json in conn uri format (#15100)

  • Adds description field in variable (#12413) (#15194)

  • Add logs to show last modified in SFTP, FTP and Filesystem sensor (#15134)

  • Execute on_failure_callback when SIGTERM is received (#15172)

  • Allow hiding of all edges when highlighting states (#15281)

  • Display explicit error in case UID has no actual username (#15212)

  • Serve logs with Scheduler when using Local or Sequential Executor (#15557)

  • Deactivate trigger, refresh, and delete controls on dag detail view. (#14144)

  • Turn off autocomplete for connection forms (#15073)

  • Increase default worker_refresh_interval to 6000 seconds (#14970)

  • Only show User’s local timezone if it’s not UTC (#13904)

  • Suppress LOG/WARNING for a few tasks CLI for better CLI experience (#14567)

  • Configurable API response (CORS) headers (#13620)

  • Allow viewers to see all docs links (#14197)

  • Update Tree View date ticks (#14141)

  • Make the tooltip to Pause / Unpause a DAG clearer (#13642)

  • Warn about precedence of env var when getting variables (#13501)

  • Move [celery] default_queue config to [operators] default_queue to reuse between executors (#14699)

Bug Fixes

  • Fix 500 error from updateTaskInstancesState API endpoint when dry_run not passed (#15889)

  • Ensure that task preceding a PythonVirtualenvOperator doesn’t fail (#15822)

  • Prevent mixed case env vars from crashing processes like worker (#14380)

  • Fixed type annotations in DAG decorator (#15778)

  • Fix on_failure_callback when task receive SIGKILL (#15537)

  • Fix dags table overflow (#15660)

  • Fix changing the parent dag state on subdag clear (#15562)

  • Fix reading from zip package to default to text (#13962)

  • Fix wrong parameter for drawDagStatsForDag in dags.html (#13884)

  • Fix QueuedLocalWorker crashing with EOFError (#13215)

  • Fix typo in NotPreviouslySkippedDep (#13933)

  • Fix parallelism after KubeExecutor pod adoption (#15555)

  • Fix kube client on mac with keepalive enabled (#15551)

  • Fixes wrong limit for dask for python>3.7 (should be <3.7) (#15545)

  • Fix Task Adoption in KubernetesExecutor (#14795)

  • Fix timeout when using XCom with KubernetesPodOperator (#15388)

  • Fix deprecated provider aliases in “extras” not working (#15465)

  • Fixed default XCom deserialization. (#14827)

  • Fix used_group_ids in dag.partial_subset (#13700) (#15308)

  • Further fix trimmed pod_id for KubernetesPodOperator (#15445)

  • Bugfix: Invalid name when trimmed pod_id ends with hyphen in KubernetesPodOperator (#15443)

  • Fix incorrect slots stats when TI pool_slots > 1 (#15426)

  • Fix DAG last run link (#15327)

  • Fix sync-perm to work correctly when update_fab_perms = False (#14847)

  • Fixes limits on Arrow for plexus test (#14781)

  • Fix UI bugs in tree view (#14566)

  • Fix AzureDataFactoryHook failing to instantiate its connection (#14565)

  • Fix permission error on non-POSIX filesystem (#13121)

  • Fix spelling in “ignorable” (#14348)

  • Fix get_context_data doctest import (#14288)

  • Correct typo in GCSObjectsWtihPrefixExistenceSensor (#14179)

  • Fix order of failed deps (#14036)

  • Fix critical CeleryKubernetesExecutor bug (#13247)

  • Fix four bugs in StackdriverTaskHandler (#13784)

  • func.sum may return Decimal that break rest APIs (#15585)

  • Persist tags params in pagination (#15411)

  • API: Raise AlreadyExists exception when the execution_date is same (#15174)

  • Remove duplicate call to sync_metadata inside DagFileProcessorManager (#15121)

  • Extra docker-py update to resolve docker op issues (#15731)

  • Ensure executors end method is called (#14085)

  • Remove user_id from API schema (#15117)

  • Prevent clickable bad links on disabled pagination (#15074)

  • Acquire lock on db for the time of migration (#10151)

  • Skip SLA check only if SLA is None (#14064)

  • Print right version in airflow info command (#14560)

  • Make airflow info work with pipes (#14528)

  • Rework client-side script for connection form. (#14052)

  • API: Add CollectionInfo in all Collections that have total_entries (#14366)

  • Fix task_instance_mutation_hook when importing airflow.models.dagrun (#15851)

Doc only changes

  • Fix docstring of SqlSensor (#15466)

  • Small changes on “DAGs and Tasks documentation” (#14853)

  • Add note on changes to configuration options (#15696)

  • Add docs to the markdownlint and yamllint config files (#15682)

  • Rename old “Experimental” API to deprecated in the docs. (#15653)

  • Fix documentation error in git_sync_template.yaml (#13197)

  • Fix doc link permission name (#14972)

  • Fix link to Helm chart docs (#14652)

  • Fix docstrings for Kubernetes code (#14605)

  • docs: Capitalize & minor fixes (#14283) (#14534)

  • Fixed reading from zip package to default to text. (#13984)

  • An initial rework of the “Concepts” docs (#15444)

  • Improve docstrings for various modules (#15047)

  • Add documentation on database connection URI (#14124)

  • Add Helm Chart logo to docs index (#14762)

  • Create a new documentation package for Helm Chart (#14643)

  • Add docs about supported logging levels (#14507)

  • Update docs about tableau and salesforce provider (#14495)

  • Replace deprecated doc links to the correct one (#14429)

  • Refactor redundant doc url logic to use utility (#14080)

  • docs: NOTICE: Updated 2016-2019 to 2016-now (#14248)

  • Skip DAG perm sync during parsing if possible (#15464)

  • Add picture and examples for Edge Labels (#15310)

  • Add example DAG & how-to guide for sqlite (#13196)

  • Add links to new modules for deprecated modules (#15316)

  • Add note in about FAB data model change (#14478)


  • Fix logging.exception redundancy (#14823)

  • Bump stylelint to remove vulnerable sub-dependency (#15784)

  • Add resolution to force dependencies to use patched version of lodash (#15777)

  • Update croniter to 1.0.x series (#15769)

  • Get rid of Airflow 1.10 in Breeze (#15712)

  • Run helm chart tests in parallel (#15706)

  • Bump ssri from 6.0.1 to 6.0.2 in /airflow/www (#15437)

  • Remove the limit on Gunicorn dependency (#15611)

  • Better “dependency already registered” warning message for tasks #14613 (#14860)

  • Pin pandas-gbq to <0.15.0 (#15114)

  • Use Pip 21.* to install airflow officially (#15513)

  • Bump mysqlclient to support the 1.4.x and 2.x series (#14978)

  • Finish refactor of DAG resource name helper (#15511)

  • Refactor/Cleanup Presentation of Graph Task and Path Highlighting (#15257)

  • Standardize default fab perms (#14946)

  • Remove datepicker for task instance detail view (#15284)

  • Turn provider’s import warnings into debug logs (#14903)

  • Remove left-over fields from required in provider_info schema. (#14119)

  • Deprecate tableau extra (#13595)

  • Use built-in cached_property on Python 3.8 where possible (#14606)

  • Clean-up JS code in UI templates (#14019)

  • Bump elliptic from 6.5.3 to 6.5.4 in /airflow/www (#14668)

  • Switch to f-strings using flynt. (#13732)

  • use jquery ready instead of vanilla js (#15258)

  • Migrate task instance log (ti_log) js (#15309)

  • Migrate graph js (#15307)

  • Migrate dags.html javascript (#14692)

  • Removes unnecessary AzureContainerInstance connection type (#15514)

  • Separate Kubernetes pod_launcher from core airflow (#15165)

  • update remaining old import paths of operators (#15127)

  • Remove broken and undocumented “demo mode” feature (#14601)

  • Simplify configuration/legibility of Webpack entries (#14551)

  • remove inline tree js (#14552)

  • Js linting and inline migration for simple scripts (#14215)

  • Remove use of repeated constant in AirflowConfigParser (#14023)

  • Deprecate email credentials from environment variables. (#13601)

  • Remove unused ‘context’ variable in (#14049)

  • Disable suppress_logs_and_warning in cli when debugging (#13180)

Airflow 2.0.2 (2021-04-19)

Significant Changes

Default [kubernetes] enable_tcp_keepalive is changed to True

This allows Airflow to work more reliably with some environments (like Azure) by default.

sync-perm CLI no longer syncs DAG specific permissions by default

The sync-perm CLI command will no longer sync DAG specific permissions by default as they are now being handled during DAG parsing. If you need or want the old behavior, you can pass --include-dags to have sync-perm also sync DAG specific permissions.

Bug Fixes

  • Bugfix: TypeError when Serializing & sorting iterable properties of DAGs (#15395)

  • Fix missing on_load trigger for folder-based plugins (#15208)

  • kubernetes cleanup-pods subcommand will only clean up Airflow-created Pods (#15204)

  • Fix password masking in CLI action_logging (#15143)

  • Fix url generation for TriggerDagRunOperatorLink (#14990)

  • Restore base lineage backend (#14146)

  • Unable to trigger backfill or manual jobs with Kubernetes executor. (#14160)

  • Bugfix: Task docs are not shown in the Task Instance Detail View (#15191)

  • Bugfix: Fix overriding pod_template_file in KubernetesExecutor (#15197)

  • Bugfix: resources in executor_config breaks Graph View in UI (#15199)

  • Fix celery executor bug trying to call len on map (#14883)

  • Fix bug in airflow.stats timing that broke dogstatsd mode (#15132)

  • Avoid scheduler/parser manager deadlock by using non-blocking IO (#15112)

  • Re-introduce dagrun.schedule_delay metric (#15105)

  • Compare string values, not if strings are the same object in Kube executor(#14942)

  • Pass queue to BaseExecutor.execute_async like in airflow 1.10 (#14861)

  • Scheduler: Remove TIs from starved pools from the critical path. (#14476)

  • Remove extra/needless deprecation warnings from airflow.contrib module (#15065)

  • Fix support for long dag_id and task_id in KubernetesExecutor (#14703)

  • Sort lists, sets and tuples in Serialized DAGs (#14909)

  • Simplify cleaning string passed to origin param (#14738) (#14905)

  • Fix error when running tasks with Sentry integration enabled. (#13929)

  • Webserver: Sanitize string passed to origin param (#14738)

  • Fix losing duration < 1 secs in tree (#13537)

  • Pin SQLAlchemy to <1.4 due to breakage of sqlalchemy-utils (#14812)

  • Fix KubernetesExecutor issue with deleted pending pods (#14810)

  • Default to Celery Task model when backend model does not exist (#14612)

  • Bugfix: Plugins endpoint was unauthenticated (#14570)

  • BugFix: fix DAG doc display (especially for TaskFlow DAGs) (#14564)

  • BugFix: TypeError in airflow.kubernetes.pod_launcher’s monitor_pod (#14513)

  • Bugfix: Fix wrong output of tags and owners in dag detail API endpoint (#14490)

  • Fix logging error with task error when JSON logging is enabled (#14456)

  • Fix StatsD metrics not sending when using daemon mode (#14454)

  • Gracefully handle missing start_date and end_date for DagRun (#14452)

  • BugFix: Serialize max_retry_delay as a timedelta (#14436)

  • Fix crash when user clicks on “Task Instance Details” caused by start_date being None (#14416)

  • BugFix: Fix TaskInstance API call fails if a task is removed from running DAG (#14381)

  • Scheduler should not fail when invalid executor_config is passed (#14323)

  • Fix bug allowing task instances to survive when dagrun_timeout is exceeded (#14321)

  • Fix bug where DAG timezone was not always shown correctly in UI tooltips (#14204)

  • Use Lax for cookie_samesite when empty string is passed (#14183)

  • [AIRFLOW-6076] fix dag.cli() KeyError (#13647)

  • Fix running child tasks in a subdag after clearing a successful subdag (#14776)


  • Remove unused JS packages causing false security alerts (#15383)

  • Change default of [kubernetes] enable_tcp_keepalive for new installs to True (#15338)

  • Fixed #14270: Add error message in OOM situations (#15207)

  • Better compatibility/diagnostics for arbitrary UID in docker image (#15162)

  • Updates 3.6 limits for latest versions of a few libraries (#15209)

  • Adds Blinker dependency which is missing after recent changes (#15182)

  • Remove ‘conf’ from search_columns in DagRun View (#15099)

  • More proper default value for namespace in K8S cleanup-pods CLI (#15060)

  • Faster default role syncing during webserver start (#15017)

  • Speed up webserver start when there are many DAGs (#14993)

  • Much easier to use and better documented Docker image (#14911)

  • Use libyaml C library when available. (#14577)

  • Don’t create unittest.cfg when not running in unit test mode (#14420)

  • Webserver: Allow Filtering TaskInstances by queued_dttm (#14708)

  • Update Flask-AppBuilder dependency to allow 3.2 (and all 3.x series) (#14665)

  • Remember expanded task groups in browser local storage (#14661)

  • Add plain format output to cli tables (#14546)

  • Make airflow dags show command display TaskGroups (#14269)

  • Increase maximum size of extra connection field. (#12944)

  • Speed up clear_task_instances by doing a single sql delete for TaskReschedule (#14048)

  • Add more flexibility with FAB menu links (#13903)

  • Add better description and guidance in case of sqlite version mismatch (#14209)

Doc only changes

  • Add documentation create/update community providers (#15061)

  • Fix mistake and typos in airflow.utils.timezone docstrings (#15180)

  • Replace new url for Stable Airflow Docs (#15169)

  • Docs: Clarify behavior of delete_worker_pods_on_failure (#14958)

  • Create a documentation package for Docker image (#14846)

  • Multiple minor doc (OpenAPI) fixes (#14917)

  • Replace Graph View Screenshot to show Auto-refresh (#14571)


  • Import Connection lazily in hooks to avoid cycles (#15361)

  • Rename last_scheduler_run into last_parsed_time, and ensure it’s updated in DB (#14581)

  • Make TaskInstance.pool_slots not nullable with a default of 1 (#14406)

  • Log migrations info in consistent way (#14158)

Airflow 2.0.1 (2021-02-08)

Significant Changes

Permission to view Airflow Configurations has been removed from User and Viewer role

Previously, Users with User or Viewer role were able to get/view configurations using the REST API or in the Webserver. From Airflow 2.0.1, only users with Admin or Op role would be able to get/view Configurations.

To allow users with other roles to view configuration, add can read on Configurations permissions to that role.

Note that if [webserver] expose_config is set to False, the API will throw a 403 response even if the user has role with can read on Configurations permission.

Default [celery] worker_concurrency is changed to 16

The default value for [celery] worker_concurrency was 16 for Airflow <2.0.0. However, it was unintentionally changed to 8 in 2.0.0.

From Airflow 2.0.1, we revert to the old default of 16.

Default [scheduler] min_file_process_interval is changed to 30

The default value for [scheduler] min_file_process_interval was 0, due to which the CPU Usage mostly stayed around 100% as the DAG files are parsed constantly.

From Airflow 2.0.0, the scheduling decisions have been moved from DagFileProcessor to Scheduler, so we can keep the default a bit higher: 30.

Bug Fixes

  • Bugfix: Return XCom Value in the XCom Endpoint API (#13684)

  • Bugfix: Import error when using custom backend and sql_alchemy_conn_secret (#13260)

  • Allow PID file path to be relative when daemonize a process (scheduler, kerberos, etc) (#13232)

  • Bugfix: no generic DROP CONSTRAINT in MySQL during airflow db upgrade (#13239)

  • Bugfix: Sync Access Control defined in DAGs when running sync-perm (#13377)

  • Stop sending Callback Requests if no callbacks are defined on DAG (#13163)

  • BugFix: Dag-level Callback Requests were not run (#13651)

  • Stop creating duplicate Dag File Processors (#13662)

  • Filter DagRuns with Task Instances in removed State while Scheduling (#13165)

  • Bump from 1.10.21 to 1.10.22 in /airflow/www (#13143)

  • Bump JS to 1.10.23 (#13253)

  • Bump dompurify from 2.0.12 to 2.2.6 in /airflow/www (#13164)

  • Update minimum cattrs version (#13223)

  • Remove inapplicable arg ‘output’ for CLI pools import/export (#13071)

  • Webserver: Fix the behavior to deactivate the authentication option and add docs (#13191)

  • Fix: add support for no-menu plugin views (#11742)

  • Add python-daemon limit for Python 3.8+ to fix daemon crash (#13540)

  • Change the default celery worker_concurrency to 16 (#13612)

  • Audit Log records View should not contain link if dag_id is None (#13619)

  • Fix invalid continue_token for cleanup list pods (#13563)

  • Switches to latest version of snowflake connector (#13654)

  • Fix backfill crash on task retry or reschedule (#13712)

  • Setting max_tis_per_query to 0 now correctly removes the limit (#13512)

  • Fix race conditions in task callback invocations (#10917)

  • Fix webserver exiting when gunicorn master crashes (#13518)(#13780)

  • Fix SQL syntax to check duplicate connections (#13783)

  • BaseBranchOperator will push to xcom by default (#13704) (#13763)

  • Fix Deprecation for configuration.getsection (#13804)

  • Fix TaskNotFound in log endpoint (#13872)

  • Fix race condition when using Dynamic DAGs (#13893)

  • Fix: Linux/Chrome window bouncing in Webserver

  • Fix db shell for sqlite (#13907)

  • Only compare updated time when Serialized DAG exists (#13899)

  • Fix dag run type enum query for mysqldb driver (#13278)

  • Add authentication to lineage endpoint for experimental API (#13870)

  • Do not add User role perms to custom roles. (#13856)

  • Do not add Website.can_read access to default roles. (#13923)

  • Fix invalid value error caused by long Kubernetes pod name (#13299)

  • Fix DB Migration for SQLite to upgrade to 2.0 (#13921)

  • Bugfix: Manual DagRun trigger should not skip scheduled runs (#13963)

  • Stop loading Extra Operator links in Scheduler (#13932)

  • Added missing return parameter in read function of FileTaskHandler (#14001)

  • Bugfix: Do not try to create a duplicate Dag Run in Scheduler (#13920)

  • Make v1/config endpoint respect webserver expose_config setting (#14020)

  • Disable row level locking for Mariadb and MySQL <8 (#14031)

  • Bugfix: Fix permissions to triggering only specific DAGs (#13922)

  • Fix broken SLA Mechanism (#14056)

  • Bugfix: Scheduler fails if task is removed at runtime (#14057)

  • Remove permissions to read Configurations for User and Viewer roles (#14067)

  • Fix DB Migration from 2.0.1rc1


  • Increase the default min_file_process_interval to decrease CPU Usage (#13664)

  • Dispose connections when running tasks with os.fork & CeleryExecutor (#13265)

  • Make function purpose clearer in example_kubernetes_executor example dag (#13216)

  • Remove unused libraries - flask-swagger, funcsigs (#13178)

  • Display alternative tooltip when a Task has yet to run (no TI) (#13162)

  • User werkzeug’s own type conversion for request args (#13184)

  • UI: Add queued_by_job_id & external_executor_id Columns to TI View (#13266)

  • Make json-merge-patch an optional library and unpin it (#13175)

  • Adds missing LDAP “extra” dependencies to ldap provider. (#13308)

  • Refactor to better reflect changes in providers (#13314)

  • Pin pyjwt and Add integration tests for Apache Pinot (#13195)

  • Removes provider-imposed requirements from setup.cfg (#13409)

  • Replace deprecated decorator (#13443)

  • Streamline & simplify __eq__ methods in models Dag and BaseOperator (#13449)

  • Additional properties should be allowed in provider schema (#13440)

  • Remove unused dependency - contextdecorator (#13455)

  • Remove ‘typing’ dependency (#13472)

  • Log migrations info in consistent way (#13458)

  • Unpin mysql-connector-python to allow 8.0.22 (#13370)

  • Remove thrift as a core dependency (#13471)

  • Add NotFound response for DELETE methods in OpenAPI YAML (#13550)

  • Stop Log Spamming when [core] lazy_load_plugins is False (#13578)

  • Display message and docs link when no plugins are loaded (#13599)

  • Unpin restriction for colorlog dependency (#13176)

  • Add missing Dag Tag for Example DAGs (#13665)

  • Support tables in DAG docs (#13533)

  • Add python3-openid dependency (#13714)

  • Add __repr__ for Executors (#13753)

  • Add description to hint if conn_type is missing (#13778)

  • Upgrade Azure blob to v12 (#12188)

  • Add extra field to get_connnection REST endpoint (#13885)

  • Make Smart Sensors DB Migration idempotent (#13892)

  • Improve the error when DAG does not exist when running dag pause command (#13900)

  • Update to fix an error message (#13927)

  • Only allow passing JSON Serializable conf to TriggerDagRunOperator (#13964)

  • Bugfix: Allow getting details of a DAG with null start_date (REST API) (#13959)

  • Add params to the DAG details endpoint (#13790)

  • Make the role assigned to anonymous users customizable (#14042)

  • Retry critical methods in Scheduler loop in case of OperationalError (#14032)

Doc only changes

  • Add Missing StatsD Metrics in Docs (#13708)

  • Add Missing Email configs in Configuration doc (#13709)

  • Add quick start for Airflow on Docker (#13660)

  • Describe which Python versions are supported (#13259)

  • Add note block to 2.x migration docs (#13094)

  • Add documentation about (#13155)

  • Add missing version information to recently added configs (#13161)

  • API: Use generic information in UpdateMask component (#13146)

  • Add Airflow 2.0.0 to requirements table (#13140)

  • Avoid confusion in doc for CeleryKubernetesExecutor (#13116)

  • Update docs link in REST API spec (#13107)

  • Add link to PyPI Repository to provider docs (#13064)

  • Fix link to Airflow master branch documentation (#13179)

  • Minor enhancements to Sensors docs (#13381)

  • Use 2.0.0 in Airflow docs & Breeze (#13379)

  • Improves documentation regarding providers and custom connections (#13375)(#13410)

  • Fix malformed table in production-deployment.rst (#13395)

  • Update celery.rst to fix broken links (#13400)

  • Remove reference to scheduler run_duration param in docs (#13346)

  • Set minimum SQLite version supported (#13412)

  • Fix installation doc (#13462)

  • Add docs about mocking variables and connections (#13502)

  • Add docs about Flask CLI (#13500)

  • Fix Upgrading to 2 guide to use rbac UI (#13569)

  • Make docs clear that Auth can not be disabled for Stable API (#13568)

  • Remove archived links from docs & add link for AIPs (#13580)

  • Minor fixes in upgrading-to-2.rst (#13583)

  • Fix Link in Upgrading to 2.0 guide (#13584)

  • Fix heading for Mocking section in best-practices.rst (#13658)

  • Add docs on how to use custom operators within plugins folder (#13186)

  • Update docs to register Operator Extra Links (#13683)

  • Improvements for database setup docs (#13696)

  • Replace module path to Class with just Class Name (#13719)

  • Update DAG Serialization docs (#13722)

  • Fix link to Apache Airflow docs in webserver (#13250)

  • Clarifies differences between extras and provider packages (#13810)

  • Add information about all access methods to the environment (#13940)

  • Docs: Fix FAQ on scheduler latency (#13969)

  • Updated taskflow api doc to show dependency with sensor (#13968)

  • Add deprecated config options to docs (#13883)

  • Added a FAQ section to the Upgrading to 2 doc (#13979)

Airflow 2.0.0 (2020-12-18)

The full changelog is about 3,000 lines long (already excluding everything backported to 1.10) so please check Airflow 2.0.0 Highlights Blog Post instead.

Significant Changes

The 2.0 release of the Airflow is a significant upgrade, and includes substantial major changes, and some of them may be breaking. Existing code written for earlier versions of this project will may require updates to use this version. Sometimes necessary configuration changes are also required. This document describes the changes that have been made, and what you need to do to update your usage.

If you experience issues or have questions, please file an issue.

Major changes

This section describes the major changes that have been made in this release.

The experimental REST API is disabled by default

The experimental REST API is disabled by default. To restore these APIs while migrating to the stable REST API, set enable_experimental_api option in [api] section to True.

Please note that the experimental REST API do not have access control. The authenticated user has full access.

SparkJDBCHook default connection

For SparkJDBCHook default connection was spark-default, and for SparkSubmitHook it was spark_default. Both hooks now use the spark_default which is a common pattern for the connection names used across all providers.

Changes to output argument in commands

From Airflow 2.0, We are replacing tabulate with rich to render commands output. Due to this change, the --output argument will no longer accept formats of tabulate tables. Instead, it now accepts:

  • table - will render the output in predefined table

  • json - will render the output as a json

  • yaml - will render the output as yaml

By doing this we increased consistency and gave users possibility to manipulate the output programmatically (when using json or yaml).

Affected commands:

  • airflow dags list

  • airflow dags report

  • airflow dags list-runs

  • airflow dags list-jobs

  • airflow connections list

  • airflow connections get

  • airflow pools list

  • airflow pools get

  • airflow pools set

  • airflow pools delete

  • airflow pools import

  • airflow pools export

  • airflow role list

  • airflow providers list

  • airflow providers get

  • airflow providers hooks

  • airflow tasks states-for-dag-run

  • airflow users list

  • airflow variables list

Azure Wasb Hook does not work together with Snowflake hook

The WasbHook in Apache Airflow use a legacy version of Azure library. While the conflict is not significant for most of the Azure hooks, it is a problem for Wasb Hook because the blob folders for both libraries overlap. Installing both Snowflake and Azure extra will result in non-importable WasbHook.

Rename all to devel_all extra

The all extras were reduced to include only user-facing dependencies. This means that this extra does not contain development dependencies. If you were relying on all extra then you should use now devel_all or figure out if you need development extras at all.

Context variables prev_execution_date_success and prev_execution_date_success are now pendulum.DateTime

Rename policy to task_policy

Because Airflow introduced DAG level policy (dag_policy) we decided to rename existing policy function to task_policy to make the distinction more profound and avoid any confusion.

Users using cluster policy need to rename their policy functions in to task_policy.

Default value for [celery] operation_timeout has changed to 1.0

From Airflow 2, by default Airflow will retry 3 times to publish task to Celery broker. This is controlled by [celery] task_publish_max_retries. Because of this we can now have a lower Operation timeout that raises AirflowTaskTimeout. This generally occurs during network blips or intermittent DNS issues.

Adding Operators and Sensors via plugins is no longer supported

Operators and Sensors should no longer be registered or imported via Airflow’s plugin mechanism – these types of classes are just treated as plain python classes by Airflow, so there is no need to register them with Airflow.

If you previously had a plugins/ and you used it like this in a DAG:

from airflow.operators.my_plugin import MyOperator

You should instead import it as:

from my_plugin import MyOperator

The name under airflow.operators. was the plugin name, where as in the second example it is the python module name where the operator is defined.

See for more info.

Importing Hooks via plugins is no longer supported

Importing hooks added in plugins via airflow.hooks.<plugin_name> is no longer supported, and hooks should just be imported as regular python modules.

from airflow.hooks.my_plugin import MyHook

You should instead import it as:

from my_plugin import MyHook

It is still possible (but not required) to “register” hooks in plugins. This is to allow future support for dynamically populating the Connections form in the UI.

See for more info.

The default value for [core] enable_xcom_pickling has been changed to False

The pickle type for XCom messages has been replaced to JSON by default to prevent RCE attacks. Note that JSON serialization is stricter than pickling, so for example if you want to pass raw bytes through XCom you must encode them using an encoding like base64. If you understand the risk and still want to use pickling, set enable_xcom_pickling = True in your Airflow config’s core section.

Airflowignore of base path

There was a bug fixed in that the “airflowignore” checked the base path of the dag folder for forbidden dags, not only the relative part. This had the effect that if the base path contained the excluded word the whole dag folder could have been excluded. For example if the airflowignore file contained x, and the dags folder was ‘/var/x/dags’, then all dags in the folder would be excluded. The fix only matches the relative path only now which means that if you previously used full path as ignored, you should change it to relative one. For example if your dag folder was ‘/var/dags/’ and your airflowignore contained ‘/var/dag/excluded/’, you should change it to ‘excluded/’.

ExternalTaskSensor provides all task context variables to execution_date_fn as keyword arguments

The old syntax of passing context as a dictionary will continue to work with the caveat that the argument must be named context. The following will break. To fix it, change ctx to context.

def execution_date_fn(execution_date, ctx):

execution_date_fn can take in any number of keyword arguments available in the task context dictionary. The following forms of execution_date_fn are all supported:

def execution_date_fn(dt):

def execution_date_fn(execution_date):

def execution_date_fn(execution_date, ds_nodash):

def execution_date_fn(execution_date, ds_nodash, dag):

Database schema changes

In order to migrate the database, you should use the command airflow db upgrade, but in some cases manual steps are required.

Unique conn_id in connection table

Previously, Airflow allowed users to add more than one connection with the same conn_id and on access it would choose one connection randomly. This acted as a basic load balancing and fault tolerance technique, when used in conjunction with retries.

This behavior caused some confusion for users, and there was no clear evidence if it actually worked well or not.

Now the conn_id will be unique. If you already have duplicates in your metadata database, you will have to manage those duplicate connections before upgrading the database.

Not-nullable conn_type column in connection table

The conn_type column in the connection table must contain content. Previously, this rule was enforced by application logic, but was not enforced by the database schema.

If you made any modifications to the table directly, make sure you don’t have null in the conn_type column.

Configuration changes

This release contains many changes that require a change in the configuration of this application or other application that integrate with it.

This section describes the changes that have been made, and what you need to do to.

airflow.contrib.utils.log has been moved

Formerly the core code was maintained by the original creators - Airbnb. The code that was in the contrib package was supported by the community. The project was passed to the Apache community and currently the entire code is maintained by the community, so now the division has no justification, and it is only due to historical reasons. In Airflow 2.0, we want to organize packages and move integrations with third party services to the airflow.providers package.

To clean up, the following packages were moved:

Old package

New package










You should update the import paths if you are setting log configurations with the logging_config_class option. The old import paths still works but can be abandoned.

SendGrid emailer has been moved

Formerly the core code was maintained by the original creators - Airbnb. The code that was in the contrib package was supported by the community. The project was passed to the Apache community and currently the entire code is maintained by the community, so now the division has no justification, and it is only due to historical reasons.

To clean up, the send_mail function from the airflow.contrib.utils.sendgrid module has been moved.

If your configuration file looks like this:

email_backend = airflow.contrib.utils.sendgrid.send_email

It should look like this now:

email_backend = airflow.providers.sendgrid.utils.emailer.send_email

The old configuration still works but can be abandoned.

Unify hostname_callable option in core section

The previous option used a colon(:) to split the module from function. Now the dot(.) is used.

The change aims to unify the format of all options that refer to objects in the airflow.cfg file.

Custom executors is loaded using full import path

In previous versions of Airflow it was possible to use plugins to load custom executors. It is still possible, but the configuration has changed. Now you don’t have to create a plugin to configure a custom executor, but you need to provide the full path to the module in the executor option in the core section. The purpose of this change is to simplify the plugin mechanism and make it easier to configure executor.

If your module was in the path my_acme_company.executors.MyCustomExecutor and the plugin was called my_plugin then your configuration looks like this

executor = my_plugin.MyCustomExecutor

And now it should look like this:

executor = my_acme_company.executors.MyCustomExecutor

The old configuration is still works but can be abandoned at any time.

Use CustomSQLAInterface instead of SQLAInterface for custom data models.

From Airflow 2.0, if you want to define your own Flask App Builder data models you need to use CustomSQLAInterface instead of SQLAInterface.

For Non-RBAC replace:

from flask_appbuilder.models.sqla.interface import SQLAInterface

datamodel = SQLAInterface(your_data_model)

with RBAC (in 1.10):

from airflow.www_rbac.utils import CustomSQLAInterface

datamodel = CustomSQLAInterface(your_data_model)

and in 2.0:

from airflow.www.utils import CustomSQLAInterface

datamodel = CustomSQLAInterface(your_data_model)
Drop plugin support for stat_name_handler

In previous version, you could use plugins mechanism to configure stat_name_handler. You should now use the stat_name_handler option in [scheduler] section to achieve the same effect.

If your plugin looked like this and was available through the test_plugin path:

def my_stat_name_handler(stat):
    return stat

class AirflowTestPlugin(AirflowPlugin):
    name = "test_plugin"
    stat_name_handler = my_stat_name_handler

then your airflow.cfg file should look like this:


This change is intended to simplify the statsd configuration.

Logging configuration has been moved to new section

The following configurations have been moved from [core] to the new [logging] section.

  • base_log_folder

  • remote_logging

  • remote_log_conn_id

  • remote_base_log_folder

  • encrypt_s3_logs

  • logging_level

  • fab_logging_level

  • logging_config_class

  • colored_console_log

  • colored_log_format

  • colored_formatter_class

  • log_format

  • simple_log_format

  • task_log_prefix_template

  • log_filename_template

  • log_processor_filename_template

  • dag_processor_manager_log_location

  • task_log_reader

Metrics configuration has been moved to new section

The following configurations have been moved from [scheduler] to the new [metrics] section.

  • statsd_on

  • statsd_host

  • statsd_port

  • statsd_prefix

  • statsd_allow_list

  • stat_name_handler

  • statsd_datadog_enabled

  • statsd_datadog_tags

  • statsd_custom_client_path

Changes to Elasticsearch logging provider

When JSON output to stdout is enabled, log lines will now contain the log_id & offset fields, this should make reading task logs from elasticsearch on the webserver work out of the box. Example configuration:

remote_logging = True
host = http://es-host:9200
write_stdout = True
json_format = True

Note that the webserver expects the log line data itself to be present in the message field of the document.

Remove gcp_service_account_keys option in airflow.cfg file

This option has been removed because it is no longer supported by the Google Kubernetes Engine. The new recommended service account keys for the Google Cloud management method is Workload Identity.

Fernet is enabled by default

The fernet mechanism is enabled by default to increase the security of the default installation. In order to restore the previous behavior, the user must consciously set an empty key in the fernet_key option of section [core] in the airflow.cfg file.

At the same time, this means that the apache-airflow[crypto] extra-packages are always installed. However, this requires that your operating system has libffi-dev installed.

Changes to propagating Kubernetes worker annotations

kubernetes_annotations configuration section has been removed. A new key worker_annotations has been added to existing kubernetes section instead. That is to remove restriction on the character set for k8s annotation keys. All key/value pairs from kubernetes_annotations should now go to worker_annotations as a json. I.e. instead of e.g.

annotation_key = annotation_value
annotation_key2 = annotation_value2

it should be rewritten to

worker_annotations = { "annotation_key" : "annotation_value", "annotation_key2" : "annotation_value2" }
Remove run_duration

We should not use the run_duration option anymore. This used to be for restarting the scheduler from time to time, but right now the scheduler is getting more stable and therefore using this setting is considered bad and might cause an inconsistent state.

Rename pool statsd metrics

Used slot has been renamed to running slot to make the name self-explanatory and the code more maintainable.

This means pool.used_slots.<pool_name> metric has been renamed to pool.running_slots.<pool_name>. The Used Slots column in Pools Web UI view has also been changed to Running Slots.

Removal of Mesos Executor

The Mesos Executor is removed from the code base as it was not widely used and not maintained. Mailing List Discussion on deleting it.

Change dag loading duration metric name

Change DAG file loading duration metric from dag.loading-duration.<dag_id> to dag.loading-duration.<dag_file>. This is to better handle the case when a DAG file has multiple DAGs.

Sentry is disabled by default

Sentry is disabled by default. To enable these integrations, you need set sentry_on option in [sentry] section to "True".

Simplified GCSTaskHandler configuration

In previous versions, in order to configure the service account key file, you had to create a connection entry. In the current version, you can configure google_key_path option in [logging] section to set the key file path.

Users using Application Default Credentials (ADC) need not take any action.

The change aims to simplify the configuration of logging, to prevent corruption of the instance configuration by changing the value controlled by the user - connection entry. If you configure a backend secret, it also means the webserver doesn’t need to connect to it. This simplifies setups with multiple GCP projects, because only one project will require the Secret Manager API to be enabled.

Changes to the core operators/hooks

We strive to ensure that there are no changes that may affect the end user and your files, but this release may contain changes that will require changes to your DAG files.

This section describes the changes that have been made, and what you need to do to update your DAG File, if you use core operators or any other.

BaseSensorOperator now respects the trigger_rule of downstream tasks

Previously, BaseSensorOperator with setting soft_fail=True skips itself and skips all its downstream tasks unconditionally, when it fails i.e the trigger_rule of downstream tasks is not respected.

In the new behavior, the trigger_rule of downstream tasks is respected. User can preserve/achieve the original behaviour by setting the trigger_rule of each downstream task to all_success.

BaseOperator uses metaclass

BaseOperator class uses a BaseOperatorMeta as a metaclass. This meta class is based on abc.ABCMeta. If your custom operator uses different metaclass then you will have to adjust it.

Remove SQL support in BaseHook

Remove get_records and get_pandas_df and run from BaseHook, which only apply for SQL-like hook, If want to use them, or your custom hook inherit them, please use airflow.hooks.dbapi.DbApiHook

Assigning task to a DAG using bitwise shift (bit-shift) operators are no longer supported

Previously, you could assign a task to a DAG as follows:

dag = DAG("my_dag")
dummy = DummyOperator(task_id="dummy")

dag >> dummy

This is no longer supported. Instead, we recommend using the DAG as context manager:

with DAG("my_dag") as dag:
    dummy = DummyOperator(task_id="dummy")
Removed deprecated import mechanism

The deprecated import mechanism has been removed so the import of modules becomes more consistent and explicit.

For example: from airflow.operators import BashOperator becomes from airflow.operators.bash_operator import BashOperator

Changes to sensor imports

Sensors are now accessible via airflow.sensors and no longer via airflow.operators.sensors.

For example: from airflow.operators.sensors import BaseSensorOperator becomes from airflow.sensors.base import BaseSensorOperator

Skipped tasks can satisfy wait_for_downstream

Previously, a task instance with wait_for_downstream=True will only run if the downstream task of the previous task instance is successful. Meanwhile, a task instance with depends_on_past=True will run if the previous task instance is either successful or skipped. These two flags are close siblings yet they have different behavior. This inconsistency in behavior made the API less intuitive to users. To maintain consistent behavior, both successful or skipped downstream task can now satisfy the wait_for_downstream=True flag.


The chain and cross_downstream methods are now moved to airflow.models.baseoperator module from airflow.utils.helpers module.

The baseoperator module seems to be a better choice to keep closely coupled methods together. Helpers module is supposed to contain standalone helper methods that can be imported by all classes.

The chain method and cross_downstream method both use BaseOperator. If any other package imports any classes or functions from helpers module, then it automatically has an implicit dependency to BaseOperator. That can often lead to cyclic dependencies.

More information in AIRFLOW-6392

In Airflow < 2.0 you imported those two methods like this:

from airflow.utils.helpers import chain
from airflow.utils.helpers import cross_downstream

In Airflow 2.0 it should be changed to:

from airflow.models.baseoperator import chain
from airflow.models.baseoperator import cross_downstream

BranchPythonOperator will now return a value equal to the task_id of the chosen branch, where previously it returned None. Since it inherits from BaseOperator it will do an xcom_push of this value if do_xcom_push=True. This is useful for downstream decision-making.


SQLSensor now consistent with python bool() function and the allow_null parameter has been removed.

It will resolve after receiving any value that is casted to True with python bool(value). That changes the previous response receiving NULL or '0'. Earlier '0' has been treated as success criteria. NULL has been treated depending on value of allow_nullparameter. But all the previous behaviour is still achievable setting param success to lambda x: x is None or str(x) not in ('0', '').


The TriggerDagRunOperator now takes a conf argument to which a dict can be provided as conf for the DagRun. As a result, the python_callable argument was removed. PR:


provide_context argument on the PythonOperator was removed. The signature of the callable passed to the PythonOperator is now inferred and argument values are always automatically provided. There is no need to explicitly provide or not provide the context anymore. For example:

def myfunc(execution_date):

python_operator = PythonOperator(task_id="mytask", python_callable=myfunc, dag=dag)

Notice you don’t have to set provide_context=True, variables from the task context are now automatically detected and provided.

All context variables can still be provided with a double-asterisk argument:

def myfunc(**context):
    print(context)  # all variables will be provided to context

python_operator = PythonOperator(task_id="mytask", python_callable=myfunc)

The task context variable names are reserved names in the callable function, hence a clash with op_args and op_kwargs results in an exception:

def myfunc(dag):
    # raises a ValueError because "dag" is a reserved name
    # valid signature example: myfunc(mydag)

python_operator = PythonOperator(

The change is backwards compatible, setting provide_context will add the provide_context variable to the kwargs (but won’t do anything).

PR: #5990


FileSensor is now takes a glob pattern, not just a filename. If the filename you are looking for has *, ?, or [ in it then you should replace these with [*], [?], and [[].


SubDagOperator is changed to use Airflow scheduler instead of backfill to schedule tasks in the subdag. User no longer need to specify the executor in SubDagOperator.

The do_xcom_push flag (a switch to push the result of an operator to xcom or not) was appearing in different incarnations in different operators. It’s function has been unified under a common name (do_xcom_push) on BaseOperator. This way it is also easy to globally disable pushing results to xcom.

The following operators were affected:

  • DatastoreExportOperator (Backwards compatible)

  • DatastoreImportOperator (Backwards compatible)

  • KubernetesPodOperator (Not backwards compatible)

  • SSHOperator (Not backwards compatible)

  • WinRMOperator (Not backwards compatible)

  • BashOperator (Not backwards compatible)

  • DockerOperator (Not backwards compatible)

  • SimpleHttpOperator (Not backwards compatible)

See AIRFLOW-3249 for details


In previous versions, the LatestOnlyOperator forcefully skipped all (direct and indirect) downstream tasks on its own. From this version on the operator will only skip direct downstream tasks and the scheduler will handle skipping any further downstream dependencies.

No change is needed if only the default trigger rule all_success is being used.

If the DAG relies on tasks with other trigger rules (i.e. all_done) being skipped by the LatestOnlyOperator, adjustments to the DAG need to be made to accommodate the change in behaviour, i.e. with additional edges from the LatestOnlyOperator.

The goal of this change is to achieve a more consistent and configurable cascading behaviour based on the BaseBranchOperator (see AIRFLOW-2923 and AIRFLOW-1784).

Changes to the core Python API

We strive to ensure that there are no changes that may affect the end user, and your Python files, but this release may contain changes that will require changes to your plugins, DAG File or other integration.

Only changes unique to this provider are described here. You should still pay attention to the changes that have been made to the core (including core operators) as they can affect the integration behavior of this provider.

This section describes the changes that have been made, and what you need to do to update your Python files.

Removed sub-package imports from airflow/

The imports LoggingMixin, conf, and AirflowException have been removed from airflow/ All implicit references of these objects will no longer be valid. To migrate, all usages of each old path must be replaced with its corresponding new path.

Old Path (Implicit Import)

New Path (Explicit Import)







Variables removed from the task instance context

The following variables were removed from the task instance context:

  • end_date

  • latest_date

  • tables


Formerly the core code was maintained by the original creators - Airbnb. The code that was in the contrib package was supported by the community. The project was passed to the Apache community and currently the entire code is maintained by the community, so now the division has no justification, and it is only due to historical reasons.

To clean up, Weekday enum has been moved from airflow.contrib.utils into airflow.utils module.


The connection module has new deprecated methods:

  • Connection.parse_from_uri

  • Connection.log_info

  • Connection.debug_info

and one deprecated function:

  • parse_netloc_to_hostname

Previously, users could create a connection object in two ways

conn_1 = Connection(conn_id="conn_a", uri="mysql://AAA/")
# or
conn_2 = Connection(conn_id="conn_a")

Now the second way is not supported.

Connection.log_info and Connection.debug_info method have been deprecated. Read each Connection field individually or use the default representation (__repr__).

The old method is still works but can be abandoned at any time. The changes are intended to delete method that are rarely used.


DAG.create_dagrun accepts run_type and does not require run_id This change is caused by adding run_type column to DagRun.

Previous signature:

def create_dagrun(


def create_dagrun(

If user provides run_id then the run_type will be derived from it by checking prefix, allowed types : manual, scheduled, backfill (defined by airflow.utils.types.DagRunType).

If user provides run_type and execution_date then run_id is constructed as {run_type}__{execution_data.isoformat()}.

Airflow should construct dagruns using run_type and execution_date, creation using run_id is preserved for user actions.


Use DagRunType.SCHEDULED.value instead of DagRun.ID_PREFIX

All the run_id prefixes for different kind of DagRuns have been grouped into a single enum in airflow.utils.types.DagRunType.

Previously, there were defined in various places, example as ID_PREFIX class variables for DagRun, BackfillJob and in _trigger_dag function.


>> from airflow.models.dagrun import DagRun

Replaced by:

>> from airflow.utils.types import DagRunType
>> DagRunType.SCHEDULED.value

We remove airflow.utils.file.TemporaryDirectory Since Airflow dropped support for Python < 3.5 there’s no need to have this custom implementation of TemporaryDirectory because the same functionality is provided by tempfile.TemporaryDirectory.

Now users instead of import from airflow.utils.files import TemporaryDirectory should do from tempfile import TemporaryDirectory. Both context managers provide the same interface, thus no additional changes should be required.


We removed airflow.AirflowMacroPlugin class. The class was there in airflow package but it has not been used (apparently since 2015). It has been removed.


CONTEXT_MANAGER_DAG was removed from settings. Its role has been taken by DagContext in ‘airflow.models.dag’. One of the reasons was that settings should be rather static than store dynamic context from the DAG, but the main one is that moving the context out of settings allowed to untangle cyclic imports between DAG, BaseOperator, SerializedDAG, SerializedBaseOperator which was part of AIRFLOW-6010.


Function redirect_stderr and redirect_stdout from airflow.utils.log.logging_mixin module has been deleted because it can be easily replaced by the standard library. The functions of the standard library are more flexible and can be used in larger cases.

The code below

import logging

from airflow.utils.log.logging_mixin import redirect_stderr, redirect_stdout

logger = logging.getLogger("custom-logger")
with redirect_stdout(logger, logging.INFO), redirect_stderr(logger, logging.WARN):
    print("I love Airflow")

can be replaced by the following code:

from contextlib import redirect_stdout, redirect_stderr
import logging

from airflow.utils.log.logging_mixin import StreamLogWriter

logger = logging.getLogger("custom-logger")

with redirect_stdout(StreamLogWriter(logger, logging.INFO)), redirect_stderr(
    StreamLogWriter(logger, logging.WARN)
    print("I Love Airflow")

Now, additional arguments passed to BaseOperator cause an exception. Previous versions of Airflow took additional arguments and displayed a message on the console. When the message was not noticed by users, it caused very difficult to detect errors.

In order to restore the previous behavior, you must set an True in the allow_illegal_arguments option of section [operators] in the airflow.cfg file. In the future it is possible to completely delete this option.


Passing store_serialized_dags argument to DagBag.init and accessing DagBag.store_serialized_dags property are deprecated and will be removed in future versions.

Previous signature:

def __init__(
    include_examples=conf.getboolean("core", "LOAD_EXAMPLES"),
    safe_mode=conf.getboolean("core", "DAG_DISCOVERY_SAFE_MODE"),


def __init__(
    include_examples=conf.getboolean("core", "LOAD_EXAMPLES"),
    safe_mode=conf.getboolean("core", "DAG_DISCOVERY_SAFE_MODE"),

If you were using positional arguments, it requires no change but if you were using keyword arguments, please change store_serialized_dags to read_dags_from_db.

Similarly, if you were using DagBag().store_serialized_dags property, change it to DagBag().read_dags_from_db.

Changes in google provider package

We strive to ensure that there are no changes that may affect the end user and your Python files, but this release may contain changes that will require changes to your configuration, DAG Files or other integration e.g. custom operators.

Only changes unique to this provider are described here. You should still pay attention to the changes that have been made to the core (including core operators) as they can affect the integration behavior of this provider.

This section describes the changes that have been made, and what you need to do to update your if you use operators or hooks which integrate with Google services (including Google Cloud - GCP).

Direct impersonation added to operators communicating with Google services

Directly impersonating a service account has been made possible for operators communicating with Google services via new argument called impersonation_chain (google_impersonation_chain in case of operators that also communicate with services of other cloud providers). As a result, GCSToS3Operator no longer derivatives from GCSListObjectsOperator.

Normalize gcp_conn_id for Google Cloud

Previously not all hooks and operators related to Google Cloud use gcp_conn_id as parameter for GCP connection. There is currently one parameter which apply to most services. Parameters like datastore_conn_id, bigquery_conn_id, google_cloud_storage_conn_id and similar have been deprecated. Operators that require two connections are not changed.

Following components were affected by normalization:


















  • airflow.operators.sql_to_gcs.BaseSQLToGoogleCloudStorageOperator

  • airflow.operators.adls_to_gcs.AdlsToGoogleCloudStorageOperator

  • airflow.operators.gcs_to_s3.GoogleCloudStorageToS3Operator

  • airflow.operators.gcs_to_gcs.GoogleCloudStorageToGoogleCloudStorageOperator

  • airflow.operators.bigquery_to_gcs.BigQueryToCloudStorageOperator

  • airflow.operators.local_to_gcs.FileToGoogleCloudStorageOperator

  • airflow.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator

  • airflow.operators.bigquery_to_bigquery.BigQueryToBigQueryOperator

Changes to import paths and names of GCP operators and hooks

According to AIP-21 operators related to Google Cloud has been moved from contrib to core. The following table shows changes in import paths.

Old path

New path