Node failures – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.6-7.15

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Briefly, this error occurs when Elasticsearch nodes fail to respond or function as expected. This could be due to network issues, hardware failures, or configuration errors. To resolve this issue, you can check the Elasticsearch logs for more detailed error messages. Ensure that the nodes are correctly configured and that the network connections are stable. If the problem persists, consider checking the hardware health or increasing the resources allocated to the Elasticsearch nodes.

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This guide will help you check for common problems that cause the log ” node_failures ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: rest-high-level, client.

Log Context

Log “node_failures” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 });  parser.declareObjectArray(optionalConstructorArg(); (p; c) ->
 TaskOperationFailure.fromXContent(p); new ParseField("task_failures"));
 parser.declareObjectArray(optionalConstructorArg(); (p; c) ->
 ElasticsearchException.fromXContent(p); new ParseField("node_failures"));
 parser.declareNamedObjects(optionalConstructorArg(); NodeData.PARSER; new ParseField("nodes"));
 PARSER = parser;
 }  @Override


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