listener = BaseHub.add(self, evtype, fileno, cb)
File "/usr/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 126, in add
evtype, fileno, evtype))
RuntimeError: Second simultaneous read on fileno 17 detected. Unless you really know what you're doing, make sure that only one greenthread can read any particular socket. Consider using a pools.Pool. If you do know what you're doing and want to disable this error, call eventlet.debug.hub_multiple_reader_prevention(False)