Briefly, this error occurs when Elasticsearch is unable to use the Java Native Access (JNA) library, which is essential for certain operations like memory locking. This could be due to missing or incompatible JNA versions. To resolve this issue, you can try the following: 1) Ensure that the JNA library is correctly installed and the version is compatible with your Elasticsearch version. 2) Check the Elasticsearch logs for any JNA-related errors and address them. 3) If Elasticsearch is running in a restricted environment, ensure it has the necessary permissions to access the JNA library.
This guide will help you check for common problems that cause the log ” cannot virtual lock because JNA is not available ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: bootstrap.
Log Context
Log “cannot virtual lock because JNA is not available” classname is Natives.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
return JNANatives.definitelyRunningAsRoot();
}
static void tryVirtualLock() {
if (JNA_AVAILABLE == false) {
logger.warn("cannot virtual lock because JNA is not available");
return;
}
JNANatives.tryVirtualLock();
}
