Failed to detect hot threads – How to solve this Elasticsearch error

Opster Team

March-22, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many configuration errors.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

This guide will help you check for common problems that cause the log ” failed to detect hot threads ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: cluster, admin, threads, node.


Log Context

Log “failed to detect hot threads”classname  is TransportNodesHotThreadsAction.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

.threadElementsSnapshotCount(request.request.snapshots)
 .ignoreIdleThreads(request.request.ignoreIdleThreads);
 try {
 return new NodeHotThreads(clusterService.localNode(); hotThreads.detect());
 } catch (Exception e) {
 throw new ElasticsearchException("failed to detect hot threads"; e);
 }
 } 
 public static class NodeRequest extends TransportRequest {

 

See how you can use AutoOps to resolve issues


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