- Fixed numerous bugs across UI, CLI, executors, and REST API, including a URL normalization vulnerability, DAG run state handling, and log redaction issues.
- Added enhancements such as scalable Tree View UI, task priority queuing, active‑only DAG listing, and Elasticsearch remote logging with Filebeat 7.
- Updated documentation, pinned docutils version, and refined Docker image requirements and package dependencies.
Apache Airflow 2.1.1
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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.