Apache Airflow 2.5.2

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)

Misc/Internal

• 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)