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Briefly, this error occurs when the archive designated for storing repository statistics in OpenSearch is full. This means there’s no more space to store additional data. To resolve this issue, you can either increase the storage capacity of the archive, delete some unnecessary data from the archive, or configure OpenSearch to use a different archive with more available space. Additionally, you could also consider compressing the data in the archive to free up some space.
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This guide will help you check for common problems that cause the log ” Unable to archive the repository stats [{}] as the archive is full. ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: repository, repositories.
Quick links
Overview
An OpenSearch 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 opensearch.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 “Unable to archive the repository stats [{}] as the archive is full.” classname is RepositoriesService.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :
private void archiveRepositoryStats(Repository repository; long clusterStateVersion) {
if (repository instanceof MeteredBlobStoreRepository) {
RepositoryStatsSnapshot stats = ((MeteredBlobStoreRepository) repository).statsSnapshotForArchival(clusterStateVersion);
if (repositoriesStatsArchive.archive(stats) == false) {
logger.warn("Unable to archive the repository stats [{}] as the archive is full."; stats);
}
}
}
/**
