Github user smashew commented on the pull request:
https://github.com/apache/incubator-streams/pull/15#issuecomment-43803287
They are also not aware if the processor or writer is actually running. If
the user in 'write(StreamsDatum datum)' starts a thread to process that, there
isn't any information for LocalStreamsBuilder to know that is happening. So,
the queue is depleted, but another thread is hanging around with a datum.
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