Hi,
It's a pitty that I had learn how to get the dump after I had already killed the process...
During this afternoon I restarted Glassfish 4 times to check whether I could get the same issue but it didn't happen again...
In other hand, from last occurrences I checked glassfish logs and all message show nothing strange,
I think I still have a VM from a problematic Ubuntu with Glassfish v2.1 that I replace for V2.1.1 at work, I'll give a try on this one tomorrow and see if I can replicate the issue.
Thanks for all support until now.
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