FlowController.reserve - deadlock on acquireUninterruptibly()

[rdmoore]

The FlowController:: reserve doesn't take the initial size of the semaphore into account when blocking.

Background: trying to provide limits to the pub/sub subscriber - wanted one-at-a-time. With the size of the semaphore set to 1, pub/sub subscriber code will usually pull back more than one message (could be as many as 1000 if I'm reading the code correctly). Each thread that processes pub/sub messages gets stuck on this call [and will never unblock].

[pongad]

This should have been fixed by googleapis/google-cloud-java#1915 .
I'll close the issue for now. Please reopen if the problem persists.