Cannot install system call filter because JNA is not available – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch is unable to install a system call filter due to the unavailability of Java Native Access (JNA). JNA is a library that allows Java applications to access native shared libraries. To resolve this issue, ensure that JNA is correctly installed and accessible by OpenSearch. If it’s not installed, download and install it. If it’s installed but not accessible, check the CLASSPATH environment variable to ensure it includes the path to the JNA library. Also, check the permissions of the JNA library to ensure OpenSearch can access it.

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This guide will help you check for common problems that cause the log ” cannot install system call filter because JNA is not available ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: bootstrap, filter.

Log Context

Log “cannot install system call filter because JNA is not available” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

        return JNANatives.LOCAL_MLOCKALL;

    static void tryInstallSystemCallFilter(Path tmpFile) {
        if (!JNA_AVAILABLE) {
            logger.warn("cannot install system call filter because JNA is not available");


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