Catch socket.errors when sending / recving bytes on wake socketpair #1069
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During a travis test run,
producer.close()
triggered an unhandled exception during client.wakeup(). The exception was a Broken Pipe during send on the wakeup socketpair. I am not sure what caused the other side of the socketpair to close, but I think we should catch the error and log a warning rather than crash.