Operation only allowed when shard state is one of – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” operation 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 and index.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

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

assert origin == Engine.Operation.Origin.LOCAL_RESET;
 assert getActiveOperationsCount() == OPERATIONS_BLOCKED
 : "locally resetting without blocking operations; active operations are [" + getActiveOperations() + "]";
 if (writeAllowedStates.contains(state) == false) {
 throw new IllegalIndexShardStateException(shardId; state; "operation only allowed when shard state is one of " +
 writeAllowedStates + "; origin [" + origin + "]");


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