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Briefly, this error occurs when OpenSearch is unable to retrieve version information from the snapshot metadata, possibly due to corruption or inaccessibility of the snapshot files. To resolve this, you can try the following: 1) Verify the integrity of your snapshot files and restore from a backup if necessary. 2) Check the permissions and accessibility of the snapshot repository. 3) If the snapshot is stored remotely, ensure the network connection is stable. 4) Update OpenSearch to the latest version as it may contain fixes for snapshot-related issues.
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This guide will help you check for common problems that cause the log ” Failure when trying to load missing version information from snapshot metadata ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: metadata, repositories, snapshot, version, blobstore.
Overview
Metadata in OpenSearch refers to additional information stored for each document. This is achieved using the specific metadata fields available in OpenSearch. The default behavior of some of these metadata fields can be customized during mapping creation.
Examples
Using _meta meta-field for storing application-specific information with the mapping:
PUT /my_index?pretty
{
"mappings": {
"_meta": {
"domain": "security",
"release_information": {
"date": "18-01-2020",
"version": "7.5"
}
}
}
}Notes
- Meta fields available include: _index, _type, _id, _source, _size, and _field_name.
Log Context
Log “Failure when trying to load missing version information from snapshot metadata” classname is BlobStoreRepository.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :
);
}
@Override
public void onFailure(Exception e) {
logger.warn("Failure when trying to load missing version information from snapshot metadata"; e);
}
}; () -> filterRepositoryDataStep.onResponse(repositoryData.withVersions(updatedVersionMap)));
snapshotIdsWithoutVersion.size()
);
for (SnapshotId snapshotId : snapshotIdsWithoutVersion) {
