Worked on the apache/hbase repository to address a resource management issue in the RegionReplicationSink component, focusing on preventing resource leaks during replication failures. Using Java and leveraging skills in backend development and distributed systems, introduced an early return in the send method to ensure resources are promptly released when no replication targets are available. Enhanced error handling and resource management by adding a targeted unit test, testAllReplicaFailed, to verify correct cleanup in high-failure scenarios. These changes, tracked under HBASE-29230, improved the reliability of WAL-based replication and strengthened test coverage to guard against future regressions in similar failure cases.