During November 2024, Leesf focused on backend development for the rapid7/iceberg repository, addressing reliability issues in HadoopTableOperations. Leesf engineered a solution in Java to ensure that temporary metadata files are properly cleaned up when commit failures occur due to existing versions, thereby preventing stale artifacts and maintaining metadata hygiene. This work involved enhancing file system operations to delete temporary files before raising a CommitFailedException, reducing the risk of metadata corruption and orphaned files. Leesf also expanded test coverage to validate the cleanup logic, demonstrating a thorough approach to distributed systems reliability and improving confidence in failure handling paths.