2016-07-13 08:56:54.275 23496 INFO neutron.wsgi [req-0b03c694-cd76-4791-b9c1-e72159dfb3e7 4471ddd81f8a4547861370f095839583 e15aaef9b52944219008d1f494a5a0ad - - -] Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/eventlet/wsgi.py", line 483, in handle_one_response
    write(b''.join(towrite))
  File "/usr/lib/python2.7/site-packages/eventlet/wsgi.py", line 426, in write
    _writelines(towrite)
  File "/usr/lib64/python2.7/socket.py", line 334, in writelines
    self.flush()
  File "/usr/lib64/python2.7/socket.py", line 303, in flush
    self._sock.sendall(view[write_offset:write_offset+buffer_size])
  File "/usr/lib/python2.7/site-packages/eventlet/greenio/base.py", line 377, in sendall
    tail = self.send(data, flags)
  File "/usr/lib/python2.7/site-packages/eventlet/greenio/base.py", line 359, in send
    total_sent += fd.send(data[total_sent:], flags)
error: [Errno 32] Broken pipe