How To Solve Issues Related to Log – JNA not found. native methods and handlers will be disabled.

How To Solve Issues Related to Log – JNA not found. native methods and handlers will be disabled.

Updated: Jan-20

Elasticsearch Version: 1.7-8.0

Background

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To troubleshoot log “JNA not found. native methods and handlers will be disabled.” it’s important to understand a few problems related to Elasticsearch concepts bootstrap. See bellow important tips and explanations on these concepts

Log Context

Log”JNA not found. native methods and handlers will be disabled.” classname is JNAKernel32Library.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

         if (Constants.WINDOWS) {
            try {
                Native.register("kernel32");
                logger.debug("windows/Kernel32 library loaded");
            } catch (NoClassDefFoundError e) {
                logger.warn("JNA not found. native methods and handlers will be disabled.");
            } catch (UnsatisfiedLinkError e) {
                logger.warn("unable to link Windows/Kernel32 library. native methods and handlers will be disabled.");
            }
        }
    }




Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 JNA not found. native methods will be disabled. java.lang.ClassNotFoundException: com.sun.jna.Native

3.60 K 3

Unable to load JNA native support library Elasticsearch 6.x

  5.82 K 6

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