midi_server surviving app crash

Hi

since there seem to be some knowledgeable people in
the house I have a tough problem for you:

Imagine the following scenario: An application A registers a
BMidiConsumer at the midi_server. Another app B connects
a BMidiProducer to the consumer and starts sending 
Midi messages to the producer. Suddenly app A crashes.

How treats the midi_server such a situation?

I think it survives the app crash.

What happens with app B that still wants to send 
messages to the consumer of the now not existing
app A?

How realises the midi_server that a registered BMidiNode has
"died" because its app has crashed?

- Michael
PS: I am just curious and don't intent to implemend the midi_server.
PPS: the media_server and maybe other servers have to solve
or have already solved similar problems.