FitNesse is started in the set up fixture so it's running,

FitNesse Status

isRunning?

true

A Graceful shutdown is initiated by making an HTTP request with the responder=shutdown

Response Requester.
uri	valid?
?responder=shutdown	true

Wait a bit for things to settle down

Sleep

100

Now FitNesse is no longer running.

FitNesse Status

isRunning?

false