Already waiting for a cluster state change – How to solve this Elasticsearch error

Opster Team

March-22, 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 ” already waiting for a cluster state change ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: cluster.

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 “already waiting for a cluster state change”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

* @param timeOutValue a timeout for waiting. If null the global observer timeout will be used.
 public void waitForNextChange(Listener listener; Predicate statePredicate; @Nullable TimeValue timeOutValue) {
 listener = new ContextPreservingListener(listener; contextHolder.newRestorableContext(false));
 if (observingContext.get() != null) {
 throw new ElasticsearchException("already waiting for a cluster state change");
 Long timeoutTimeLeftMS;
 if (timeOutValue == null) {
 timeOutValue = this.timeOutValue;


Try AutoOps to detect and fix issues in your cluster:

Analyze Your Cluster

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