Failed to commit engine – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to commit changes to the engine, which could be due to a variety of reasons such as disk space issues, network problems, or corrupted indices. To resolve this issue, you can try the following: 1) Check if there’s enough disk space and free up space if necessary. 2) Check the network connectivity between nodes. 3) Try to repair the corrupted indices or restore them from a backup. 4) If the problem persists, consider restarting the Elasticsearch node.

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

Log Context

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

 * If assertions are enabled; IndexWriter throws AssertionError on commit if any files don't exist; but tests that randomly
 * throw FileNotFoundException or NoSuchFileException can also hit this.
 if (ExceptionsHelper.stackTrace(e).contains("org.apache.lucene.index.IndexWriter.filesExist")) {
 final EngineException engineException = new EngineException(shardId; "failed to commit engine"; e);
 try {
 failEngine("lucene commit failed"; engineException);
 } catch (final Exception inner) {


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