Could not read repository data from index blob – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Before you dig into reading this guide, have you tried asking OpsGPT what this log means? You’ll receive a customized analysis of your log.

Try OpsGPT now for step-by-step guidance and tailored insights into your Elasticsearch operation.

Briefly, this error occurs when Elasticsearch fails to read the repository data from the index blob. This could be due to corruption of the blob, insufficient permissions, or connectivity issues with the storage backend. To resolve this, you can try the following: 1) Check and correct the permissions of the blob storage. 2) Verify the connectivity with the storage backend. 3) If the blob is corrupted, restore it from a backup. 4) If the issue persists, consider reindexing the data.

For a complete solution to your to your search operation, try for free AutoOps for Elasticsearch & OpenSearch . With AutoOps and Opster’s proactive support, you don’t have to worry about your search operation – we take charge of it. Get improved performance & stability with less hardware.

This guide will help you check for common problems that cause the log ” could not read repository data from index blob ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: blobstore, repository, index, repositories.

Log Context

Log “could not read repository data from index blob” class name is BlobStoreRepository.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 // operations must start from the EMPTY_REPO_GEN again
 if (latestKnownRepoGen.compareAndSet(indexGen; RepositoryData.EMPTY_REPO_GEN)) {
 logger.warn("Resetting repository generation tracker because we failed to read generation [" + indexGen + "]"; ioe);
 }
 }
 throw new RepositoryException(metadata.name(); "could not read repository data from index blob"; ioe);
 }
 }  private static String testBlobPrefix(String seed) {
 return TESTS_FILE + seed;

 

How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?