Log Failing snapshot of shard on unassigned shard – How To Solve Related Issues

Log Failing snapshot of shard on unassigned 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 “Failing snapshot of shard on unassigned shard” it’s important to understand a few problems related to Elasticsearch concepts shard, snapshot, snapshots. See bellow important tips and explanations on these concepts

Log Context

Log”Failing snapshot of shard [{}] on unassigned shard [{}]” classname is SnapshotsService.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                         }
                    }
                }
                // Shard that we were waiting for went into unassigned state or disappeared - giving up
                snapshotChanged = true;
                logger.warn("failing snapshot of shard [{}] on unassigned shard [{}]"; shardId; shardStatus.nodeId());
                shards.put(shardId; new ShardSnapshotStatus(shardStatus.nodeId(); State.FAILED; "shard is unassigned"));
            } else {
                shards.put(shardId; shardStatus);
            }
        }




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 Failed to restore snapshot – IndexShardRestoreFailedException file not found in elasticsearch

1.25 K 2

Github Issue Number 9275  

Snapshot Restore Failed Recovery Of

 

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