Unable to find index in cluster state – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.6-8.9

Briefly, this error occurs when Elasticsearch cannot locate the specified index in the cluster state. This could be due to the index being deleted, renamed, or not yet created. To resolve this issue, you can verify the index name for any typographical errors, check if the index exists by using the ‘GET /_cat/indices?v’ command, or recreate the index if it has been deleted. Also, ensure that the Elasticsearch cluster state is healthy and up-to-date.

This guide will help you check for common problems that cause the log ” Unable to find index in cluster state ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: shard, index, cluster.

Log Context

Log “Unable to find index in cluster state” class name is RemoveCorruptedShardDataCommand.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 shardId = Objects.requireNonNull(shardIdOption.value(options); "Shard ID is required");
 indexMetadata = clusterState.metadata().index(indexName);
 }  if (indexMetadata == null) {
 throw new ElasticsearchException("Unable to find index in cluster state");
 }  final IndexSettings indexSettings = new IndexSettings(indexMetadata; settings);
 final Index index = indexMetadata.getIndex();
 final ShardId shId = new ShardId(index; shardId);


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