There is a difference between "seems to work" and "supported". If the JVM works without issue in the virutal machine, then fine (this is the "seems to work" case). If you run into a JVM crash in a virtual machine, you have to first reproduce it in a physical machine before Sun will look at the issue. That is what is meant by "not supported". If it was supported, you could submit the crash from the virtual machine. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4233693#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...