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Briefly, this error occurs when OpenSearch fails to restore a snapshot due to issues like insufficient disk space, incompatible snapshot version, or network connectivity problems. To resolve this, ensure there’s enough disk space and the snapshot version is compatible with the current OpenSearch version. Also, check the network connectivity between the OpenSearch cluster and the snapshot repository. If the snapshot is corrupted, consider creating a new one. Lastly, check OpenSearch logs for more specific error details.
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This guide will help you check for common problems that cause the log ” [{}] failed to restore snapshot ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: restore, snapshot.
Log Context
Log “[{}] failed to restore snapshot” classname is RestoreService.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :
return builder.settings(settingsBuilder).build();
}
@Override
public void onFailure(String source; Exception e) {
logger.warn(() -> new ParameterizedMessage("[{}] failed to restore snapshot"; snapshotId); e);
listener.onFailure(e);
}
@Override
public TimeValue timeout() {
