- Added major new capabilities: customizable Timetable, deferrable (async) tasks, Docker Taskflow decorator, Airflow Standalone command, plus extensive UI and REST API enhancements (e.g., Next Run view, DAG tag filtering, user management e...
- Implemented numerous operational improvements and bug fixes including scheduler shutdown handling, Dask and Kubernetes executor fixes, REST API consistency, UI stability patches, and various security‑related validations.
- Introduced deprecation notices for SubDagOperator and the dummy trigger rule, and added other deprecation warnings for community providers.
Apache Airflow 2.2.0
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Updated XCom handling for pandas 3, now storing the class name; all components must be upgraded or DataFrames from pandas 3 become unreadable.