Task cancelled – 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 ” task cancelled ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: task.

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 “task cancelled [“classname  is CancellableTask.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

private TaskCancelledException getTaskCancelledException() {
 assert Thread.holdsLock(this);
 assert isCancelled;
 assert reason != null;
 return new TaskCancelledException("task cancelled [" + reason + ']');
 * This interface is implemented by any class that needs to react to the cancellation of this task.


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