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

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Last update: Jan-20

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Troubleshooting Background – start here to get the full picture       
Related Issues – selected resources on related issues  
Log Context – usefull for experts
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Troubleshooting background

To troubleshoot Elasticsearch log “JNA not found. native methods will be disabled.” it’s important to know common problems related to Elasticsearch concepts: bootstrap. See below-detailed explanations complete with common problems, examples and useful tips.


To help troubleshoot related issues we have gathered selected Q&A from the community and issues from Github , please review the following for further information :

1. JNA not found. native methods will be disabled. java.lang.ClassNotFoundException: com.sun.jna.Native – Stats : ♥ 3.60 K  Ι √ 3

2. Unable to load JNA native support library Elasticsearch 6.x – Stats : ♥ 5.82 K  Ι √    6


Log Context

Log ”JNA not found. native methods will be disabled.” classname is Natives.java
We have extracted the following from Elasticsearch source code to get an in-depth context :

             // load one of the main JNA classes to see if the classes are available. this does not ensure that all native
            // libraries are available; only the ones necessary by JNA to function
            Class.forName("com.sun.jna.Native");
            v = true;
        } catch (ClassNotFoundException e) {
            logger.warn("JNA not found. native methods will be disabled."; e);
        } catch (UnsatisfiedLinkError e) {
            logger.warn("unable to load JNA native support library; native methods will be disabled."; e);
        }
        JNA_AVAILABLE = v;
    }






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