Attempt to execute a master node operation without task – How to solve related issues

Opster Team

Jan-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Attempt to execute a master node operation without task ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: master, node and 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 “Attempt to execute a master node operation without task” classname is TransportMasterNodeAction.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 
    protected abstract ClusterBlockException checkBlock(Request request; ClusterState state);

    
Override
    protected final void doExecute(final Request request; ActionListener listener) {
        logger.warn("attempt to execute a master node operation without task");
        throw new UnsupportedOperationException("task parameter is required for this operation");
    }

    
Override
    protected void doExecute(Task task; final Request request; ActionListener listener) {


 

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