Currently if a JChannel is shunned and disconnects, higher level services are unaware of this and can't take any remedial action.

We need to do something like implement ChannelListener so an HAPartition is aware when the events on the underlying channel occur. Then devise a scheme to propagate some of the events to user code. Preferably this will follow as much as possible the existing notification scheme; i.e. pass a new view to HAMembershipListener impls that doesn't include the current node.