Shard must have a valid translog UUID – How to solve this Elasticsearch error

Opster Team

March-22, Version: 1.7-8.0

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This guide will help you check for common problems that cause the log ” shard must have a valid translog UUID ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: shard, index.

Log Context

Log “shard must have a valid translog UUID”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

// Retrieve the generation and UUID from the existing data
 commitData = commits.get(commits.size() - 1).getUserData();
 final String translogUUID = commitData.get(Translog.TRANSLOG_UUID_KEY);
 if (translogUUID == null) {
 throw new ElasticsearchException("shard must have a valid translog UUID");
 final long globalCheckpoint = commitData.containsKey(SequenceNumbers.MAX_SEQ_NO)
 ? Long.parseLong(commitData.get(SequenceNumbers.MAX_SEQ_NO))
 : SequenceNumbers.UNASSIGNED_SEQ_NO;


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