UUID length can t be larger than the translog – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when the length of the UUID (Universally Unique Identifier) exceeds the size of the transaction log (translog) in Elasticsearch. The translog records changes made to Elasticsearch, and its size is limited. To resolve this issue, you can either reduce the length of the UUID or increase the size of the translog. However, increasing the translog size may impact performance, so it’s recommended to optimize the UUID length. Also, ensure that the UUID is correctly generated and doesn’t contain unnecessary characters.

This guide will help you check for common problems that cause the log ” UUID length can’t be larger than the translog ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “UUID length can’t be larger than the translog” class name is TranslogHeader.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 final int version = readHeaderVersion(path; channel; in);
 // Read the translogUUID
 final int uuidLen = in.readInt();
 if (uuidLen > channel.size()) {
 throw new TranslogCorruptedException(path.toString(); "UUID length can't be larger than the translog");
 if (uuidLen <= 0) {
 throw new TranslogCorruptedException(path.toString(); "UUID length must be positive");
 final BytesRef uuid = new BytesRef(uuidLen);


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