Concurrent modification of the index-N file; expected current generation – Elasticsearch Error How To Solve Related Issues



Concurrent modification of the index-N file; expected current generation – Elasticsearch Error How To Solve Related Issues

Updated: July-20

Elasticsearch Version: 1.7-8.0

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

 

This guide will help you check for common problems that cause the log “concurrent modification of the index-N file; expected current generation” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: repositories, blobstore.


Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to discover the cause of many errors and provides suitable actionable recommendations (free tool that requires no installation). 

Log Context

Log”concurrent modification of the index-N file; expected current generation [“classname  is BlobStoreRepository.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

// snapshot delete run anyway.
  logger.debug("Determined repository's generation from its contents to [" + generation + "] but " +
  "current generation is at least [" + genToLoad + "]");
  }
  if (genToLoad != repositoryStateId) {
  throw new RepositoryException(metadata.name(); "concurrent modification of the index-N file; expected current generation [" +
  repositoryStateId + "]; actual current generation [" + genToLoad + "]");
  }
  if (cached != null && cached.v1() == genToLoad) {
  return repositoryDataFromCachedEntry(cached);
  }

 

Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 Causes of getting a java.lang.VerifyError -views 292,207 ,score 191

Illegal character in path at index 16 -views   194,436,score 38

 

 

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