A following engine does not accept operations without an assigned sequence number – Elasticsearch Error How To Solve Related Issues



A following engine does not accept operations without an assigned sequence number – 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 “a following engine does not accept operations without an assigned sequence number” 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: index, plugin.


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”a following engine does not accept operations without an assigned sequence number”classname  is FollowingEngine.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

}
 
  private void preFlight(final Operation operation) {
  assert FollowingEngineAssertions.preFlight(operation);
  if (operation.seqNo() == SequenceNumbers.UNASSIGNED_SEQ_NO) {
  throw new ElasticsearchStatusException("a following engine does not accept operations without an assigned sequence number";
  RestStatus.FORBIDDEN);
  }
  }
 
  @Override

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 Replica Shard is in unallocated state after upgrade to 6.0 from 5.6.0 …  

Replica Shard is in unallocated state after upgrade to 6.0 from 5.6.0 …  



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