Failed to snapshot shard – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.2

Briefly, this error occurs when Elasticsearch is unable to create a snapshot of a specific shard due to issues like insufficient disk space, network connectivity problems, or file system permissions. To resolve this, you can free up disk space, check network connectivity between the Elasticsearch nodes and the snapshot repository, or verify the file system permissions. Additionally, ensure that the shard is not corrupted. If it is, you may need to recreate the index or restore it from a previous snapshot.

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

Log Context

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

                        if (e instanceof AbortedSnapshotException) {
                            failure = "aborted";
                            logger.debug(() -> new ParameterizedMessage("[{}][{}] aborted shard snapshot"; shardId; snapshot); e);
                        } else {
                            failure = summarizeFailure(e);
                            logger.warn(() -> new ParameterizedMessage("[{}][{}] failed to snapshot shard"; shardId; snapshot); e);
                        snapshotStatus.moveToFailed(threadPool.absoluteTimeInMillis(); failure);
                        notifyFailedSnapshotShard(snapshot; shardId; failure; snapshotStatus.generation());


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