How To Solve Issues Related to Log – The specified location should start with a repository path specified by the path.repo setting; but the path.repo setting was not set on this node

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Troubleshooting background

To troubleshoot Elasticsearch log “The specified location should start with a repository path specified by the path.repo setting; but the path.repo setting was not set on this node” 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.

Nodes in Elasticsearch

What it is

Simply explained a node is a single server that is part of a cluster. Each node is assigned with one or more roles, which describes the node responsibility and operations – Data nodes stores the data, and participates in the cluster’s indexing and search capabilities, while master nodes are responsible for managing the cluster activities and storing the cluster state, including the metadata.

While it’s possible to run several Node instances of Elasticsearch on the same hardware, it’s considered a best practice to limit a server to a single running instance of Elasticsearch.

Nodes connect to each other and form a cluster by using a discovery method. 

Roles
Master node

Master nodes are in charge of cluster-wide settings and changes  – deleting or creating indices and fields, adding or removing nodes and allocating shards to nodes. Each cluster has a single master node that is elected from the master eligible nodes using a distributed consensus algorithm and is reelected if the current master node fails.

Coordinator Node (aka client node)

Coordinator Node – is a node that does not hold any configured role. It doesn’t hold data, not part of the master eligible group nor execute ingest pipelines. Coordinator node serves incoming search requests and is acting as the query coordinator – running the query and fetch phases, sending requests to every node which holds a shard being queried. The client node also distributes bulk indexing operations and route queries to shards copies based on the nodes responsiveness.


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 :

Issue Adding Master Only Node Path
discuss.elastic.co/t/issue-adding-master-only-node-path-repo-not-set/119716

 

Path Repo Is Empty
discuss.elastic.co/t/path-repo-is-empty/25166

 


Log Context

Log ”The specified location should start with a repository path specified by the path.repo setting; but the path.repo setting was not set on this node” classname is FsRepository.java
We have extracted the following from Elasticsearch source code to get an in-depth context :

         if (locationFile == null) {
            if (environment.repoFiles().length > 0) {
                logger.warn("The specified location [{}] doesn't start with any repository paths specified by the path.repo setting: [{}] "; location; environment.repoFiles());
                throw new RepositoryException(name.name(); "location [" + location + "] doesn't match any of the locations specified by path.repo");
            } else {
                logger.warn("The specified location [{}] should start with a repository path specified by the path.repo setting; but the path.repo setting was not set on this node"; location);
                throw new RepositoryException(name.name(); "location [" + location + "] doesn't match any of the locations specified by path.repo because this setting is empty");
            }
        }

        blobStore = new FsBlobStore(settings; locationFile);






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