Timeout waiting for task – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many errors.

Briefly, this error message is indicating that Elasticsearch timed out while waiting for a task to complete. This could be due to various factors such as slow network connectivity, insufficient cluster resources, or long-running tasks. To resolve this issue, you should monitor the cluster performance and identify the root cause of the task timeout.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them. Take a self-guided product tour to see for yourself (no registration required).

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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