A router separating process p from two others, q and r, fails immediately after p initiates the
multicasting of message m. If the group communication system is view-synchronous, explain what
happens to p next.

What will be an ideal response?

Process p must receive a new group view containing only itself, and it must receive the message it sent. The
question is: in what order should these events be delivered to p?.
If p received the message first, then that would tell p that q and r received the message; but the question implies
that they did not receive it. So p must receive the group view first.