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Briefly, this error occurs when OpenSearch tries to restore a snapshot, but the segments file is missing. The segments file is crucial as it contains information about the index segments. This could be due to corruption or deletion of the file. To resolve this, you can try to restore a different snapshot that has a complete set of files. If no other snapshots are available, you may need to rebuild the index. Always ensure to have a robust backup strategy to prevent such issues. Regularly check the integrity of your snapshots to ensure they are complete and usable.
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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 OpenSearch concepts: repositories, blobstore, snapshot.
Log Context
Log “Snapshot has no segments file” class name is FileRestoreContext.java. We extracted the following from OpenSearch 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());
