How to solve jna not found issue in cassandra1.1.2
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  [1]: http://stackoverflow.com/questions/9561189/why-still-getting-jna-error-on-cassandra-startup-even-the-jna-jar-and-platform

I'm using cassandra 1.1.2 on ubuntu os.
I see the following log at start:
    
    INFO 14:42:59,319 JNA not found. Native methods will be disabled.


I've found [this issue][1], but I'm not sure about the versions and where should I locate this files.

Could someone describe the exact steps to solve this issue. Thanks

