Can you post the involved code? Click on the "use advance editor" link and you should get a >> button that will format the code.
last but not least cleaning up the code for demonstration purpose it came to my mind that I was entirely off the track.
My problem resulted from abuse of EntityManagers and some awfully wrong assumptions, it especially had absolutely nothing to do with HornetQ.
Sorry for the confusion, thanks for your attention!
I was thinking of adding diagrams to https://docs.jboss.org/author/display/AS71/JPA+Reference+Guide that might try to make some of the concepts less confusing (to compliment the textual descriptions).
Thanks for sharing!