Timeout waiting for task – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.6-7.6

Briefly, this error occurs when Elasticsearch takes longer than the configured timeout period to complete a task. This could be due to heavy indexing, slow queries, or insufficient resources. To resolve this, you can increase the timeout limit, optimize your queries, or scale up your Elasticsearch cluster to handle more load. Additionally, ensure that your Elasticsearch cluster is properly configured and that there are no network issues causing delays.

This guide will help you check for common problems that cause the log ” Timeout waiting for task [ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: persistent, plugin and task.

Log Context

Log “Timeout waiting for task [” classname is TransformPersistentTasksExecutor.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        try {
            latch.await(MARK_AS_FAILED_TIMEOUT_SEC; TimeUnit.SECONDS);
        } catch (InterruptedException e) {
            logger.error("Timeout waiting for task [" + task.getTransformId() + "] to be marked as failed in cluster state"; e);

    private void startTask(
        TransformTask buildTask;


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