[jira] [Created] (CASSANDRA-6749) -Dcassandra.boot_without_jna=true does not actually disable JNA

["Ryan McGuire (JIRA)" <ji...@apache.org>]

Ryan McGuire created CASSANDRA-6749:
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             Summary: -Dcassandra.boot_without_jna=true does not actually disable JNA
                 Key: CASSANDRA-6749
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6749
             Project: Cassandra
          Issue Type: Bug
            Reporter: Ryan McGuire
            Priority: Minor


The JVM argument '-Dcassandra.boot_without_jna=true' appropriately allows Cassandra to start if the jna jar file *is missing* from the lib directory. However, in the case that the jar *does* exist, this flag does not actually disable JNA. 

I am basing this assertion on the fact that even when I use this flag I see my entire heap space is preallocated (mlockall.) and by restarting after removing the jna jar file, the heapspace is not preallocated.



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