Briefly, this error occurs when Elasticsearch successfully loads all snapshot version information from snapshot metadata. This is not an error message, but an informational message indicating that the snapshot metadata has been successfully loaded. If you’re seeing this message frequently and it’s causing confusion, you may want to adjust your logging levels to reduce the verbosity. Alternatively, if you’re having issues with snapshots, ensure that your snapshot repository is correctly configured and that you have sufficient permissions to access it.
This guide will help you check for common problems that cause the log ” Successfully loaded all snapshot’s version information for {} from snapshot metadata ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: metadata, snapshot, blobstore, repositories, version.
Overview
Metadata in Elasticsearch refers to additional information stored for each document. This is achieved using the specific metadata fields available in Elasticsearch. 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
- In version 2.x, Elasticsearch had a total 13 meta fields available, which are: _index, _uid, _type, _id, _source, _size, _all, _field_names, _timestamp, _ttl, _parent, _routing, _meta
- In version 5.x, _timestamp and _ttl meta fields were removed.
- In version 6.x, the _parent meta field was removed.
- In version 7.x, _uid and _all meta fields were removed.
Log Context
Log “Successfully loaded all snapshot’s version information for {} from snapshot metadata” classname is BlobStoreRepository.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
final GroupedActionListenerloadAllVersionsListener = new GroupedActionListener( ActionListener.runAfter( new ActionListener >() { @Override public void onResponse(Collection voids) { logger.info("Successfully loaded all snapshot's version information for {} from snapshot metadata"; AllocationService.firstListElementsToCommaDelimitedString( snapshotIdsWithoutVersion; SnapshotId::toString; logger.isDebugEnabled())); } @Override
