Briefly, this error occurs when you try to create a new snapshot in Elasticsearch with a name that already exists in the repository. Elasticsearch doesn’t allow duplicate snapshot names within the same repository. To resolve this issue, you can either delete the existing snapshot before creating a new one with the same name, or simply use a different, unique name for the new snapshot. It’s also a good practice to implement a naming convention for snapshots to avoid such conflicts.
This guide will help you check for common problems that cause the log ” snapshot with the same name already exists ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: snapshot, repositories, blobstore.
Overview
An Elasticsearch snapshot provides a backup mechanism that takes the current state and data in the cluster and saves it to a repository (read snapshot for more information). The backup process requires a repository to be created first. The repository needs to be registered using the _snapshot endpoint, and multiple repositories can be created per cluster. The following repository types are supported:
Repository types
| Repository type | Configuration type |
|---|---|
| Shared file system | Type: “fs” |
| S3 | Type : “s3” |
| HDFS | Type :“hdfs” |
| Azure | Type: “azure” |
| Google Cloud Storage | Type : “gcs” |
Examples
To register an “fs” repository:
PUT _snapshot/my_repo_01
{
"type": "fs",
"settings": {
"location": "/mnt/my_repo_dir"
}
}Notes and good things to know
- S3, HDFS, Azure and Google Cloud require a relevant plugin to be installed before it can be used for a snapshot.
- The setting, path.repo: /mnt/my_repo_dir needs to be added to elasticsearch.yml on all the nodes if you are planning to use the repo type of file system. Otherwise, it will fail.
- When using remote repositories, the network bandwidth and repository storage throughput should be high enough to complete the snapshot operations normally, otherwise you will end up with partial snapshots.
Log Context
Log “snapshot with the same name already exists” class name is BlobStoreRepository.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
try {
final String snapshotName = snapshotId.getName();
// check if the snapshot name already exists in the repository
final RepositoryData repositoryData = getRepositoryData();
if (repositoryData.getSnapshotIds().stream().anyMatch(s -> s.getName().equals(snapshotName))) {
throw new InvalidSnapshotNameException(metadata.name(); snapshotId.getName(); "snapshot with the same name already exists");
} // Write Global MetaData
globalMetaDataFormat.write(clusterMetaData; blobContainer(); snapshotId.getUUID());
