Log Unexpected failure while processing shard started – How To Solve Related Issues

Log Unexpected failure while processing shard started – How To Solve Related Issues

Updated: Feb-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 “Unexpected failure while processing shard started” 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”{} unexpected failure while processing shard started [{}]” classname is ShardStateAction.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                                     shardRoutingToBeApplied.add(shardRouting);
                                    logger.debug("{} will apply shard started {}"; shardRouting.shardId(); shardRoutingEntry);
                                }

                            } catch (Throwable t) {
                                logger.error("{} unexpected failure while processing shard started [{}]"; t; shardRouting.shardId(); shardRouting);
                            }
                        }

                        if (shardRoutingToBeApplied.isEmpty()) {
                            return currentState;




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 Fail To Assign Shards After Restart  

Corrupted Translog  

 

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