Failed to delete shard after failed engine – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 1.3-1.3

Briefly, this error occurs when Elasticsearch attempts to delete a shard after an engine failure but is unable to do so. This could be due to issues like insufficient permissions, disk space issues, or network connectivity problems. To resolve this, you can try increasing disk space, checking network connectivity, or adjusting the permissions for the Elasticsearch process. Additionally, you can also try restarting the Elasticsearch node or reindexing the data.

This guide will help you check for common problems that cause the log ” [{}][{}] failed to delete shard after failed engine ([{}]) ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: cluster, delete, indices and shard.

Log Context

Log “[{}][{}] failed to delete shard after failed engine ([{}])” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

indexService.removeShard(; failureMessage);
                            } catch (IndexShardMissingException e) {
                                // the node got closed on us; ignore it
                            } catch (Throwable e1) {
                                logger.warn("[{}][{}] failed to delete shard after failed engine ([{}])"; e1; indexService.index().name();; reason);
                        try {
                            failedShards.put(fShardRouting.shardId(); new FailedShard(fShardRouting.version()));
                            shardStateAction.shardFailed(fShardRouting; indexUUID; failureMessage);


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