The JBoss Transaction version is 4.2.3 SP3
I'm afraid you'll have to give us a bit more information than this to go on. For example, can you attach a debugger and inspect the thread?
No.. I'm not attach a debugger.
I susptected that process is to long (more than one hour), and by using "top" command on linux, the machine was total free.
After that, I call kill -3 on JVM process, and in full thread dump Java HotSpot did not appear none thread (or object) of my application. All threads in thread dump were of the arjuna...
P.S. Yesterday I had de same problem, but the arjuna commit conclude with success after 30 minutes.
OK. Sorry, but until you can give us more information (and a test case would be useful too), it's not going to be possible for us to track this down.