Suspect illegal state: trying to move shard from primary mode to replica mode – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

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

This guide will help you check for common problems that cause the log ” Suspect illegal state: trying to move shard from primary mode to replica mode ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index and shard.

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 “suspect illegal state: trying to move shard from primary mode to replica mode” classname is IndexShard.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                     "; new " + newRouting);
        }
        try {
            if (currentRouting != null) {
                if (!newRouting.primary() && currentRouting.primary()) {
                    logger.warn("suspect illegal state: trying to move shard from primary mode to replica mode");
                }
                // if its the same routing except for some metadata info; return
                if (currentRouting.equalsIgnoringMetaData(newRouting)) {
                    this.shardRouting = newRouting; // might have a new version
                    return;




 

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