Operations only allowed when shard state is one of – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

Briefly, this error occurs when an operation is attempted on a shard in Elasticsearch that is not in the correct state. Elasticsearch operations can only be performed when the shard state is either started or relocated. If the shard is in an incorrect state, such as initializing, closing, or closed, operations cannot be performed. To resolve this issue, you can either wait for the shard to reach the correct state or manually change the shard state. However, manually changing the shard state should be done with caution as it can lead to data loss or corruption.

This guide will help you check for common problems that cause the log ” operations only allowed when shard state is one of ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: shard, index.

Log Context

Log “operations only allowed when shard state is one of” class name is IndexShard.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 }  public void readAllowed() throws IllegalIndexShardStateException {
 IndexShardState state = this.state; // one time volatile read
 if (readAllowedStates.contains(state) == false) {
 throw new IllegalIndexShardStateException(shardId; state; "operations only allowed when shard state is one of " +
 }  /** returns true if the {@link IndexShardState} allows reading */


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