How To Solve Issues Related to Log – Failed to change repository

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Related Issues – selected resources on related issues  
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Troubleshooting background

To troubleshoot Elasticsearch log “Failed to change repository” it’s important to know common problems related to Elasticsearch concepts: repositories, repository-azure. See below-detailed explanations complete with common problems, examples and useful tips.

Repositories/Repository in Elasticsearch

What it is

An Elasticsearch snapshot provides a backup mechanism that takes the current state and data in the cluster and saves it to a repository (read the Glossary term 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 per cluster can be created. The following repository types are supported. 

Repository Types:
Repository TypeConfiguration Type
Shared file systemType: “fs”
S3Type : “s3”
HDFSType :“hdfs”
AzureType: “azure”
Google Cloud StorageType : “gcs”
Examples

To register a repository of type fs:

PUT _snapshot/my_repo_01
{
"type": "fs",
"settings": {
"location": "/mnt/my_repo_dir"
  }
}
Notes and common problems
  • S3, HDFS , Azure and Google Cloud requires 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 in case you are planning to use repo type of file system otherwise it will fail
  • In case of 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 in partial snapshots.


To help troubleshoot related issues we have gathered selected Q&A from the community and issues from Github , please review the following for further information :

1. Can’t register a snapshot repository in Elasticsearch – Stats : ♥ 3.41 K  Ι √ 2

2. Failed To Create S3 Repository With      


Log Context

Log ”Failed to change repository” classname is RepositoriesService.java
We have extracted the following from Elasticsearch source code to get an in-depth context :

                             try {
                                repository = createRepository(repositoryMetaData; typesRegistry);
                            } catch (RepositoryException ex) {
                                // TODO: this catch is bogus; it means the old repo is already closed;
                                // but we have nothing to replace it
                                logger.warn(() -> new ParameterizedMessage("failed to change repository [{}]";
                                    repositoryMetaData.name()); ex);
                            }
                        }
                    } else {
                        try {






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