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Briefly, this error occurs when you try to delete a snapshot from an Elasticsearch repository that is set to readonly. The repository’s settings prevent any modifications, including deletions. To resolve this issue, you can change the repository settings from readonly to readwrite. Alternatively, you can create a new repository with readwrite permissions, move the snapshots there, and then delete the snapshots. Always ensure to backup your data before making any changes to avoid data loss.
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This guide will help you check for common problems that cause the log ” cannot delete snapshot from a readonly repository ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: snapshot, blobstore, delete, repositories, repository.
Overview
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 “cannot delete snapshot from a readonly repository” class name is BlobStoreRepository.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
long repositoryStateId;
Version repositoryMetaVersion;
SnapshotDeleteListener listener
) {
if (isReadOnly()) {
listener.onFailure(new RepositoryException(metadata.name(); "cannot delete snapshot from a readonly repository"));
} else {
threadPool.executor(ThreadPool.Names.SNAPSHOT).execute(new AbstractRunnable() {
@Override
protected void doRun() throws Exception {
final Map rootBlobs = blobContainer().listBlobs();
