During April 2025, Chenglei contributed to the apache/hbase repository by addressing a resource management issue in the RegionReplicationSink component. He fixed a potential resource leak that could occur when all replication targets failed, improving the reliability of WAL-based replication in distributed systems. Chenglei’s solution involved introducing an early return in the Java-based send method to ensure timely resource cleanup when no replicas were available. He reinforced the fix with targeted unit testing, specifically adding a test to verify correct resource release in failure scenarios. His work demonstrated strong backend development and error handling skills, with careful attention to test coverage.