UUID length must be positive – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when the system tries to generate a UUID (Universally Unique Identifier) with a negative or zero length, which is invalid. UUIDs should have a positive length. To resolve this issue, you can check the code or configuration that generates the UUID to ensure it’s set to produce a positive length. If it’s a third-party plugin or software causing the issue, consider updating or reinstalling it. Also, ensure that the system isn’t running out of resources, as this could cause such errors.

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This guide will help you check for common problems that cause the log ” UUID length must be positive ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: index.

Log Context

Log “UUID length must be positive” class name is TranslogHeader.java. We extracted the following from OpenSearch source code for those seeking an in-depth context :

 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);
 uuid.length = uuidLen;
 in.read(uuid.bytes; uuid.offset; uuid.length);
 // Read the primary term


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