JNA not found. native methods (mlockall) will be disabled. – 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 can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” JNA not found. native methods (mlockall) will be disabled. ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

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 “JNA not found. native methods (mlockall) will be disabled.” classname is CLibrary.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 
    static {
        try {
            Native.register("c");
        } catch (NoClassDefFoundError e) {
            logger.warn("JNA not found. native methods (mlockall) will be disabled.");
        } catch (UnsatisfiedLinkError e) {
            logger.warn("unable to link C library. native methods (mlockall) will be disabled.");
        }
    }





 

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