March 2026: Key feature delivery and reliability improvements centered on aligning AsyncFileReader with the latest Arrow ecosystem. Upgraded arrow-rs to 58.0.0 and refactored AsyncFileReader to match the new API, focusing on metadata retrieval and range handling to improve correctness and compatibility. Minor maintenance improvements include an import-order fix. These changes reduce runtime risk, simplify future upgrades, and strengthen Parquet integration across apache/opendal.

October 2025 (2025-10) monthly summary for apache/arrow. Key feature delivered: a fix to PyArrow MapScalar so that nested maps are converted when maps_as_pydicts is enabled, enabling accurate round-trip data representations. Major bugs fixed: nested map values were previously only converted at the top level; now nested structures are correctly handled. Overall impact: improved data correctness and reliability for nested maps in Python workflows, reducing downstream bugs and improving interoperability. Technologies demonstrated: Python, PyArrow internals (MapScalar, maps_as_pydicts), code changes tied to GH-47380 (#47454) with commit 0d32975ee1f1d36b3f53968019ff2e377d0c0057.