Log Failed to create shard – How To Solve Related Issues

Log Failed to create shard – How To Solve Related Issues

Updated: Feb-20

Elasticsearch Version: 1.7-8.0


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

Log Context

Log”[{}][{}] failed to create shard” classname is IndicesClusterStateService.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            } catch (IndexShardAlreadyExistsException e) {
                // ignore this; the method call can happen several times
            } catch (Throwable e) {
                logger.warn("[{}][{}] failed to create shard"; e; shardRouting.index(); shardRouting.id());
                try {
                    indexService.removeShard(shardId; "failed to create [" + ExceptionsHelper.detailedMessage(e) + "]");
                } catch (IndexShardMissingException e1) {
                    // ignore
                } catch (Throwable e1) {

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 Create Shard Exception  

Github Issue Number 12011  


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