How To Solve Issues Related to Log – Failed to apply failed shards

How To Solve Issues Related to Log – Failed to apply failed shards

Updated: Jan-20

Elasticsearch Version: 1.7-8.0


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

Log Context

Log”Failed to apply failed shards {}” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

             ClusterState maybeUpdatedState = currentState;
            try {
                maybeUpdatedState = applyFailedShards(currentState; failedShardsToBeApplied; staleShardsToBeApplied);
            } catch (Exception e) {
                logger.warn(() -> new ParameterizedMessage("failed to apply failed shards {}"; failedShardsToBeApplied); e);
                // failures are communicated back to the requester
                // cluster state will not be updated in this case
                batchResultBuilder.failures(tasksToBeApplied; 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 12055  

5 Of 30 Shards Failed In Elastic 5  

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