Lakehouse Research Base

Sep 8, 2026 · Big Data

HDFS HA Architecture: Components, ZKFC Failover, and Split-Brain Prevention

This article explains HDFS High Availability architecture, detailing core components, the ZKFC-driven automatic failover process, split-brain causes like network partitions and GC pauses, and prevention mechanisms including JournalNode quorum, ZooKeeper locks, and fencing, plus production best practices.