Worked on enhancing the robustness of WAL processing in the apache/hbase repository by addressing failures in incremental backups caused by empty WAL files. Applied deep knowledge of Java, Hadoop, and MapReduce to modify WALInputFormat, introducing exception handling for WALHeaderEOFException so that WALPlayer now skips empty WAL files. This change allowed incremental backups to proceed even when region servers crashed or legacy WAL writers produced empty logs, reducing backup downtime and improving data protection. Demonstrated a strong focus on backend resilience and operational reliability, with careful attention to exception handling and the intricacies of HBase WAL workflows throughout the process.