Snapshot has no segments file – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

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Briefly, this error occurs when Elasticsearch tries to restore a snapshot but can’t find the segments file. The segments file is crucial as it contains information about the index segments. This error can be caused by a corrupted snapshot or issues with the storage system. To resolve this, you can try to restore from a different snapshot, ensure the storage system is functioning properly, or recreate the snapshot if possible. If the error persists, you may need to rebuild the index from your original data source.

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This guide will help you check for common problems that cause the log ” Snapshot has no segments file ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: blobstore, snapshot, repositories.

Log Context

Log “Snapshot has no segments file” class name is FileRestoreContext.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 final Store.MetadataSnapshot sourceMetadata = new Store.MetadataSnapshot(unmodifiableMap(snapshotMetadata); emptyMap(); 0);  final StoreFileMetadata restoredSegmentsFile = sourceMetadata.getSegmentsFile();
 if (restoredSegmentsFile == null) {
 throw new IndexShardRestoreFailedException(shardId; "Snapshot has no segments file");
 }  final Store.RecoveryDiff diff = sourceMetadata.recoveryDiff(recoveryTargetMetadata);
 for (StoreFileMetadata md : diff.identical) {
 BlobStoreIndexShardSnapshot.FileInfo fileInfo = fileInfos.get(md.name());

 

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