Issue: ordering and missing message behavior

What is the behavior of a WSRM receiver that is ordering messages and one of
the messages is never received, or at least not within the MET (timeout) of
a subsequent message even though ACKing is being used?

For example: it receives msg #0, #1, #3. The MET for message #3 is 5 minutes
so the receiver cannot wait more that 5 minutes for #2 to arrive. What does
it do when the 5 minutes expires?

Options:
(a) Send a fault back to the sender, notify the application, and abort all
further ordering for the group.
(b) Send a fault back, deliver #3 to the app just before it times out, and
continuing ordering all subsequent messages.
(c) Something else?


Scott