Faulty node – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7-8.9

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Briefly, this error occurs when a node in the Elasticsearch cluster is not functioning correctly. This could be due to various reasons such as network issues, hardware failure, or configuration errors. To resolve this issue, you can try restarting the faulty node, checking the node’s hardware, or reviewing the node’s configuration settings. If the problem persists, consider removing the faulty node from the cluster and replacing it with a new one.

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

Log Context

Log “faulty node” class name is Publication.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 }  void onFaultyNode(DiscoveryNode faultyNode) {
 if (isActive() && discoveryNode.equals(faultyNode)) {
 logger.debug("onFaultyNode: [{}] is faulty; failing target in publication {}"; faultyNode; Publication.this);
 setFailed(new ElasticsearchException("faulty node"));
 }  DiscoveryNode getDiscoveryNode() {


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