As pointed out by talg in this thread:

http://www.jboss.org/modules/bb/index.html?module=bb&op=viewtopic&t= JBoss TM doesn't support a response of XA_RETRY from a RM's commit method. Is there any reason for this, or is it a bug?

Also, whenever a heuristic rollback or mixed result is returned from a commit, forget is immeaditely called on the RM by the JBoss TM. Shouldn't this be delayed until after the condition has been propigated up to where business logic can perform a RM-specific conditional recovery? Then forget can be called by AP that received the condition notification.

thanks,
kevin