Failed to mark shard as failed after a failed engine – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 1.3-1.3

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Briefly, this error occurs when Elasticsearch is unable to mark a shard as failed after the engine failure. This could be due to network issues, disk space problems, or a bug in Elasticsearch. To resolve this issue, you can try the following: 1) Check and ensure there’s sufficient disk space. 2) Verify network connectivity between nodes. 3) Upgrade Elasticsearch to the latest version to fix potential bugs. 4) Check the Elasticsearch logs for more detailed error messages that can help identify the root cause.

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

Log Context

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

                        try {
                            failedShards.put(fShardRouting.shardId(); new FailedShard(fShardRouting.version()));
                            shardStateAction.shardFailed(fShardRouting; indexUUID; failureMessage);
                        } catch (Throwable e1) {
                            logger.warn("[{}][{}] failed to mark shard as failed after a failed engine ([{}])"; e1; indexService.index().name();; reason);


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