- Added many bug fixes including scheduler queue limits, DagRun ordering, task instance clearing, Sentry handler errors, pod state handling, and MySQL driver queries
- Improved UI/UX and documentation with faster graph view loading, clearer tooltips, widened run column, better provider package discoverability, and expanded installing‑from‑sources guides
Apache Airflow 2.1.4
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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.