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

Background

Before you begin reading this guide try our beta Elasticsearch Health Check-Up it analyses JSON’s to provide personalized recommendations that can improve your clusters performance.


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 ShardStateAction.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

             ClusterState maybeUpdatedState = currentState;
            try {
                maybeUpdatedState = applyFailedShards(currentState; failedShardsToBeApplied; staleShardsToBeApplied);
                batchResultBuilder.successes(tasksToBeApplied);
            } 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  

About Opster

Opster detects root causes of Elasticsearch problems, provides automated recommendations and can perform various actions to prevent issues and optimize performance

Find Configuration Errors

Analyze Now