VMem Issues on Java8


        
            
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            metspace issues in java8
http://java-latte.blogspot.com/2014/03/metaspace-in-java-8.html
maps to virtual directly and is unlimited

https://issues.apache.org/jira/browse/YARN-4714

-XX:ReservedCodeCacheSize=100M -XX:MaxMetaspaceSize=256m -XX:CompressedClassSpaceSize=256