It appears that address-full-policy DROP, drops incoming messages. Is there a way to make it drop the oldest messages? Qpid calls this RING. If not I'll enter a Jira enhancement ticket.
I'm not sure if that's very useful, since we have paging.
QPID doesn't provide any paging mechanism... I think this feature would probably be moot if they had it.
Besides there are implications on dropping the newest message. (Especially with ordering).
You can add a feature request and we can do the evaluation later.