Data Engineering AWS Big Data Blog · 2026-10-29T18:25:48Z · 1 min read

Optimizing Apache HBase availability on Amazon EMR, Part 1: Coordinator startup, RegionServer recovery, and regions in transition

A repeatable process for keeping Apache HBase on Amazon EMR highly available. Part 1 covers triaging an HBase coordinator that is slow to start, a RegionServer that leaves the cluster, and regions that stay in transition, with the web UI pages, commands, and log signatures that point to each cause.

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