Comment 3 for bug 1523691

There are cases where the exception that bubbles won't be the fault of the zone (say, a MessagingException), and you don't want to mark the zone in ERROR.

If the load for the CRUD operations is spread over the various processes, the errors that bubble up will be caught and handled just like a normal operation, either during the actual create/delete process, or by the change not getting out when MiniDNS polls for it.