Updated: Jan-20
Elasticsearch Version: 1.7-8.0
Background
To resolve issues causing many log errors you can try our Elasticsearch Check-Up it analyses ES configuration to provide actionable recommendations (no installation required)
To troubleshoot log “Failed to delete shard snapshot file” it’s important to understand a few problems related to Elasticsearch concepts blobstore, delete, discovery-file, repositories, repository-azure, shard, snapshot. See bellow important tips and explanations on these concepts
DELETE Elasticsearch API
What is it
DELETE is an Elasticsearch API which removes a document from a specific index. This API requires an index name and _id document to delete the document.
Delete a document
DELETE /my_index/_doc/1
Notes
- A delete request throws 404 error code if the document does not already exist in the index.
- If you want to delete a set of documents that matches a query, you need to use delete by query API.
Log Context
Log”[{}] [{}] failed to delete shard snapshot file” classname is BlobStoreRepository.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
int fileListGeneration = tuple.v2();
try {
indexShardSnapshotFormat.delete(blobContainer; snapshotId.getUUID());
} catch (IOException e) {
logger.warn(new ParameterizedMessage("[{}] [{}] failed to delete shard snapshot file"; shardId; snapshotId); e);
}
// Build a list of snapshots that should be preserved
List newSnapshotsList = new ArrayList();
for (SnapshotFiles point : snapshots) {
Related issues to this log
We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :
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