Unknown error occurred while updating cluster state – How to solve this Elasticsearch error

Unknown error occurred while updating cluster state – 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 Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Unknown error occurred while updating cluster state ” 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: cluster and 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 pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).

Log Context

Log”Unknown error occurred while updating cluster state”classname  is TransportSetUpgradeModeAction.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

acknowledgedResponse -> {
  // State change was not acknowledged; we either timed out or ran into some exception
  // We should not continue and alert failure to the end user
  if (acknowledgedResponse.isAcknowledged() == false) {
  logger.info("Cluster state update is NOT acknowledged");
  wrappedListener.onFailure(new ElasticsearchTimeoutException("Unknown error occurred while updating cluster state"));
  return;
  }
 
  // There are no tasks to worry about starting/stopping
  if (tasksCustomMetadata == null || tasksCustomMetadata.tasks().isEmpty()) {

 

Run the Check-Up to get a customized report like this:

Analyze your cluster