gistfile1.txt

$ sudo circusd --log-level debug etc/circus.ini                                                                                         
2014-06-05 13:30:58 circus[9266] [INFO] Starting master on pid 9266
2014-06-05 13:30:58 circus[9266] [ERROR] exception coercing to Unicode: need string or buffer, NoneType found caught
  File "/usr/local/lib/python2.7/dist-packages/tornado/gen.py", line 227, in wrapper
    runner.run()
  File "/usr/local/lib/python2.7/dist-packages/tornado/gen.py", line 531, in run
    yielded = self.gen.send(next)
  File "/usr/local/lib/python2.7/dist-packages/circus/arbiter.py", line 510, in start
    self.initialize()
  File "/usr/local/lib/python2.7/dist-packages/circus/util.py", line 461, in _log
    return func(self, *args, **kw)
  File "/usr/local/lib/python2.7/dist-packages/circus/arbiter.py", line 480, in initialize
    self.sockets.bind_and_listen_all()
  File "/usr/local/lib/python2.7/dist-packages/circus/sockets.py", line 189, in bind_and_listen_all
    sock.bind_and_listen()
  File "/usr/local/lib/python2.7/dist-packages/circus/sockets.py", line 90, in bind_and_listen
    if os.path.exists(self.path):
  File "/usr/lib/python2.7/genericpath.py", line 18, in exists
    os.stat(path)