How To Solve Issues Related to Log – Failed to send shard started to

How To Solve Issues Related to Log – Failed to send shard started to

Updated: Feb-20

Elasticsearch Version: 1.7-8.0


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To troubleshoot log “Failed to send shard started to” it’s important to understand a few problems related to Elasticsearch concepts cluster, shard. See bellow important tips and explanations on these concepts

Log Context

Log”failed to send shard started to [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

         logger.debug("{} sending shard started for {}"; shardRoutingEntry.shardRouting.shardId(); shardRoutingEntry);
                SHARD_STARTED_ACTION_NAME; new ShardRoutingEntry(shardRouting; indexUUID; reason; null); new EmptyTransportResponseHandler(ThreadPool.Names.SAME) {
                    public void handleException(TransportException exp) {
                        logger.warn("failed to send shard started to [{}]"; exp; masterNode);


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 Failing to start shard in ElasticSearch IndexShardGatewayRecoveryException "sending failed" 13.09 K 9

Es Nodes Crashing Failed To Send Fa  

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