During November 2025, WJ Yi focused on enhancing reliability in the apache/parquet-java repository by addressing a critical bug in the cloud write path. Yi implemented robust error handling in Java to prevent data from being flushed to the cloud when a write operation encounters an exception, thereby preserving data integrity and ensuring cloud-state consistency. This work involved careful data processing and comprehensive unit testing to align the write path with best practices for exception safety. Although no new features were added, Yi’s targeted fix reduced the risk of partial or corrupted data in cloud storage, reflecting a depth of engineering focus.