Temp index should not trigger shard creation – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when an attempt is made to create a shard for a temporary index in OpenSearch. Temporary indices are typically used for transient operations and should not trigger shard creation. This could be due to a misconfiguration or a bug in the system. To resolve this issue, you can try the following: 1) Review your index settings and ensure that auto shard creation is disabled for temporary indices. 2) Check your OpenSearch version and update if necessary, as this could be a known issue fixed in a later release. 3) Debug your code to identify any operations that might be incorrectly triggering shard creation.

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This guide will help you check for common problems that cause the log ” temp index should not trigger shard creation [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: index, shard, indices.

Log Context

Log “temp index should not trigger shard creation [{}]” class name is IndicesService.java. We extracted the following from OpenSearch source code for those seeking an in-depth context :

 // double check that shard is not created.
 new IndexEventListener() {
 public void beforeIndexShardCreated(ShardId shardId; Settings indexSettings) {
 assert false : "temp index should not trigger shard creation";
 throw new OpenSearchException("temp index should not trigger shard creation [{}]"; index);
 }  @Override
 public void onStoreCreated(ShardId shardId) {
 assert false : "temp index should not trigger store creation";


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