Hi Shark JIT fails to work when using HotSpot 20. This webrev fix by backporting Shark fixes from OpenJDK bug 7032458. http://labb.zafena.se/openjdk/pr690-shark-jit-regression-hs20/ The webrev are made against hsx20 http://hg.openjdk.java.net/hsx/hsx20/master/ I don't have a bug id for this. Cheers Xerxes