Path ” + basePath() + ” is not accessible on master node – How to solve this Elasticsearch error

Opster Team

March-22, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many configuration errors.

Briefly, this error occurs when the base path is not accessible on the master node. This could be due to incorrect configuration settings or a problem with the Elasticsearch server. To resolve this issue, check the configuration settings and make sure that the Elasticsearch server is running properly.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

This guide will help you check for common problems that cause the log ” path ” + basePath() + ” is not accessible on master node ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: repositories, blobstore, master, node.

Log Context

Log “path ” + basePath() + ” is not accessible on master node”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

BlobContainer testContainer = blobStore().blobContainer(basePath().add(testBlobPrefix(seed)));
 testContainer.writeBlobAtomic("master.dat"; new BytesArray(testBytes); true);
 return seed;
 } catch (Exception exp) {
 throw new RepositoryVerificationException(; "path " + basePath() + " is not accessible on master node"; exp);
 public void endVerification(String seed) {


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