Optimizing Apache HBase availability on Amazon EMR, Part 1: Coordinator startup, RegionServer recovery, and regions in transition
Big Data Blog
This article provides a repeatable troubleshooting framework for three common Apache HBase availability issues on Amazon EMR: slow coordinator startup, RegionServer recovery, and regions stuck in transition.
- Three-level triage approach: Level 1 read-only checks, Level 2 log analysis, Level 3 advanced interventions
- Restore slow HBase coordinators by checking HDFS, JVM garbage collection, ZooKeeper, S3 throttling, and known bugs
- Recover RegionServers by reading coordinator logs first, checking for GC pauses and time skew, and using the canary tool
- Resolve regions in transition by inspecting state consistency with HBCK2 and applying targeted fixes like reassignment
- Quick reference table maps common log signatures to root causes and next troubleshooting steps
Following this structured process helps operations teams efficiently diagnose and resolve HBase availability issues on Amazon EMR.
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