Tencent Database Technology
Feb 27, 2019 · Operations
Elasticsearch Cluster Recovery Pitfall: Excessive Shard Recovery Concurrency Leads to Cluster Hang
This article details a real‑world Elasticsearch cluster recovery issue where setting the shard recovery concurrency too high saturated the generic thread pool, causing the entire cluster to hang, and explains the underlying concepts, reproduction steps, analysis, and mitigation measures.
Cluster RecoveryElasticsearchshard-recovery
0 likes · 10 min read