Failed to read operation from translog – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch is unable to read an operation from the transaction log (translog). This could be due to corruption in the translog, disk I/O issues, or a bug in OpenSearch. To resolve this issue, you can try to recover the translog, check the health of your disk and fix any issues, or upgrade OpenSearch to the latest version to fix any potential bugs. If the problem persists, you may need to reindex your data.

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

Log Context

Log “failed to read operation from translog” class name is We extracted the following from OpenSearch source code for those seeking an in-depth context :

 } catch (IOException e) {
 maybeFailEngine("realtime_get"; e); // lets check if the translog has failed with a tragic event
 throw new EngineException(shardId; "failed to read operation from translog"; e);
 } else {


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