Log no longer master while failing shard – How To Solve Related Issues

Log no longer master while failing shard – How To Solve Related Issues

Opster Team

Jan-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up  which can resolve issues causing many log errors (free and no installation required)


This guide will help you check for common problems that cause the log “no longer master while failing shard” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: cluster, master, shard.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to discover the cause of many errors and provides suitable actionable recommendations. 

Log Context

Log”{} no longer master while failing shard [{}]” classname is ShardStateAction.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :


                    public void onNoLongerMaster(String source) {
                        logger.error("{} no longer master while failing shard [{}]"; request.shardId; request);
                        try {
                            channel.sendResponse(new NotMasterException(source));
                        } catch (Exception channelException) {
                            logger.warn(() ->
                                new ParameterizedMessage("{} failed to send no longer master while failing shard [{}]";


Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 ElasticSearch: Unassigned Shards, how to fix? -views 203.11 K ,score 152

My Cluster Always Yellow  


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