Briefly, this error occurs when Elasticsearch cannot find the Java Native Access (JNA) library, which is used to call native applications and libraries from Java code. This could be due to a missing or incorrectly installed JNA library. To resolve this issue, you can try reinstalling the JNA library or ensure that Elasticsearch has the correct permissions to access the JNA library. Additionally, check your system’s PATH to ensure it includes the directory where the JNA library is located.
This guide will help you check for common problems that cause the log ” JNA not found. native methods and handlers will be disabled. ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: bootstrap.
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.");
}
}
}
