Log Starting to track leader shard – How To Solve Related Issues

Log Starting to track leader shard – How To Solve Related Issues

Updated: Jan-20

Elasticsearch Version: 1.7-8.0

Background

To resolve issues causing many log errors you can try our Elasticsearch Check-Up it analyses ES configuration to provide actionable recommendations (no installation required) 


To troubleshoot log “Starting to track leader shard” it’s important to understand a few problems related to Elasticsearch concepts plugin, shard. See bellow important tips and explanations on these concepts

Log Context

Log”{} Starting to track leader shard {}” classname is ShardFollowTasksExecutor.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 
    
Override
    protected void nodeOperation(final AllocatedPersistentTask task; final ShardFollowTask params; final PersistentTaskState state) {
        Client followerClient = wrapClient(client; params.getHeaders());
        ShardFollowNodeTask shardFollowNodeTask = (ShardFollowNodeTask) task;
        logger.info("{} Starting to track leader shard {}"; params.getFollowShardId(); params.getLeaderShardId());

        FollowerStatsInfoHandler handler = (followerHistoryUUID; followerGCP; maxSeqNo) -> {
            shardFollowNodeTask.start(followerHistoryUUID; followerGCP; maxSeqNo; followerGCP; maxSeqNo);
        };
        Consumer errorHandler = e -> {



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 Github Issue Number 34016  

Github Issue Number 41737  

Github Issue Number 34648

 

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