Fatal error registering persistent 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.

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.

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

Log Context

Log “Fatal error registering persistent task [” classname is PersistentTasksNodeService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        AllocatedPersistentTask task;
        try {
            task = (AllocatedPersistentTask) taskManager.register("persistent"; taskInProgress.getTaskName() + "[c]"; request);
        } catch (Exception e) {
            logger.error("Fatal error registering persistent task [" + taskInProgress.getTaskName()
                + "] with id [" + taskInProgress.getId() + "] and allocation id [" + taskInProgress.getAllocationId()
                + "]; removing from persistent tasks"; e);
            notifyMasterOfFailedTask(taskInProgress; e);


Watch product tour

Try AutoOps to find & fix Elasticsearch problems

Analyze Your Cluster
Skip to content