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

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

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Check-Up which can resolve issues that cause many errors.

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: repositories, repository, blobstore and index.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “could not read repository data from index blob”classname  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;

 

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