Failed execution – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

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Briefly, this error occurs when Elasticsearch is unable to execute a task or operation due to various reasons such as insufficient resources, incorrect query syntax, or network issues. To resolve this, you can try the following: 1) Check the server’s resources (CPU, memory, disk space) and increase them if necessary. 2) Review the query syntax for any errors and correct them. 3) Check the network connection between the client and the Elasticsearch server. 4) Look at the Elasticsearch logs for more detailed error information.

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

Log Context

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

 public static RuntimeException rethrowExecutionException(ExecutionException e) {
 if (e.getCause() instanceof RuntimeException runtimeException) {
 return runtimeException;
 } else {
 return new UncategorizedExecutionException("Failed execution"; e);


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