Failed to snapshot shard – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch fails 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, ensure there’s enough disk space and the network connection is stable. Check the file system permissions to ensure OpenSearch has the necessary access. Also, verify the snapshot repository’s configuration and health. If the issue persists, consider relocating the shard to another node or recreating the index.

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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 OpenSearch concepts: snapshot, shard.

Log Context

Log “[{}][{}] failed to snapshot shard” classname is
We extracted the following from OpenSearch 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);


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