Apache Airflow 3.1.2

📦 PyPI: https://pypi.org/project/apache-airflow/3.1.2/ 📚 Docs: https://airflow.apache.org/docs/apache-airflow/3.1.2/ 🛠 Release Notes: https://airflow.apache.org/docs/apache-airflow/3.1.2/release_notes.html 🐳 Docker Image: "docker pull apache/airflow:3.1.2" 🚏 Constraints: https://github.com/apache/airflow/tree/constraints-3.1.2 ## Significant Changes No significant changes. ## Bug Fixes - Fix import error when upgrading structlog to 25.5.0+ (#57335) - Fix connection retrieval in ``DagProcessorManager`` for bundle initialization (#57459) - Fix incorrect task instance counts displayed in task group headers (#55670) - Fix task retry execution after tasks are killed by external signals (#55767) - Fix triggerer errors after Airflow 2 to 3 migration (#55884) - Fix tasks unable to access ``triggering_user_name`` context variable (#56193) - Fix outlet event extra data being empty in task instance success listener callbacks (#57031) - UI: Fix panel button spacing and alignment issues (#57062) - UI: Fix broken grid view links for tasks with retries (#57097) - Fix DAG processor crash when renaming DAG tag case on MySQL (#57113) - Fix iteration errors when using ``ObjectStoragePath`` (#57156) - Fix auto-refresh not working on Required Actions page (#57207) - Fix DAG processor crash by ignoring callbacks from other bundles (#57330) - Fix asset name text overflow in DAG list view (#57363) - Fix memory leak caused by repeated SSL context creation in API client (#57374) - Fix performance issues loading DAG list page with many DAGs (#57444) - Fix text selection jumping unexpectedly in log viewer (#57453) - Fix DAG documentation pane not scroll-able when content is too long (#57518) - Fix incorrect macro listings in template reference documentation (#57529) - Fix Human-In-The-Loop operators failing when using notifiers (#57551) - Fix n+1 query issues in XCom API endpoints (#57554) - Fix n+1 query issues in Event Logs API endpoint (#57558) - Fix n+1 query to fetch tags in the dags list page (#57570) - Optimize database query to prevent "Out of sort memory" errors with many DAG versions (#57042) - Optimize DAG list query for users with limited access (#57460) - Optimize dynamic DAG updates to avoid loading large serialized DAGs (#57592) - Reduce serialized DAG size by optimizing callback serialization in ``default_args`` (#57397) ## Miscellaneous - UI: Improve global navigation visual design, interaction, and accessibility (#57565) - UI: Add button to download all task logs at once (#56771) - UI: Add timestamp column to ``XCom`` viewer and standardize task instance columns (#57447) - UI: Improve highlighting of selected task instances and edges in grid view (#57560) - Improve retry logic by migrating from ``retryhttp`` to ``tenacity`` library (#56762) - Improve exception logging for task instance heartbeat failures (#57179) - Add ``Content-Type`` header to Task SDK API requests (#57386) - Log execution API server URL at task startup (#57409) - Reduce log noise by changing "Connection not found" from error to debug level (#57548) - Add ``task_display_name`` alias in event log API responses (#57609) - Improve Pydantic model validation strictness in serialization (#57616) - Fix systemd service files issues (#57231) ## Doc Only Changes - Improve plugin system documentation for clarity and completeness (#57068) - Improve clarity on api workers recommendation in docs (#57404) - Fix ``instance_name`` in UI docs (#57523) - Fix airflow macros list in template document (#57529)