Failed to delete shard snapshot file – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.3

Briefly, this error occurs when Elasticsearch is unable to delete a shard snapshot file. This could be due to insufficient permissions, a locked file, or a network issue. To resolve this, you can try the following: 1) Check and adjust the file permissions to ensure Elasticsearch has the necessary access. 2) Ensure the file is not being used or locked by another process. 3) Check your network connection if the snapshot is stored remotely. 4) If the snapshot is corrupted, you may need to manually delete it. Always ensure you have a backup before deleting any files.

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

Log Context

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

            int fileListGeneration = tuple.v2();

            try {
                indexShardSnapshotFormat.delete(blobContainer; snapshotId.getUUID());
            } catch (IOException e) {
                logger.warn(new ParameterizedMessage("[{}] [{}] failed to delete shard snapshot file"; shardId; snapshotId); e);

            // Build a list of snapshots that should be preserved
            List newSnapshotsList = new ArrayList();
            for (SnapshotFiles point : snapshots) {