Switch network control failed

[lycfr]

executable code:sudo --atcd-wan eth0 --atcd-lan wlan0
prompt:
ERROR:sparts.tasks:Error creating task, AtcdNBServerTask
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/sparts/vtask.py", line 313, in init
t.initTask()
File "/usr/local/lib/python2.7/dist-packages/sparts/tasks/thrift.py", line 146, in initTask
self.server.prepare()
File "/usr/local/lib/python2.7/dist-packages/thrift/server/TNonblockingServer.py", line 256, in prepare
self.socket.listen()
File "/usr/local/lib/python2.7/dist-packages/thrift/transport/TSocket.py", line 185, in listen
self.handle.bind(res[4])
File "/usr/lib/python2.7/socket.py", line 224, in meth
return getattr(self._sock,name)(*args)
error: [Errno 98] Address already in use
INFO:AtcdVService.AtcdLinuxShaper:Calling initialize_shaping_system
INFO:AtcdVService.AtcdLinuxShaper:Running /sbin/iptables -t mangle -F FORWARD
INFO:AtcdVService.AtcdLinuxShaper:deleting root QDisc on wlan0
INFO:AtcdVService.AtcdLinuxShaper:setting root qdisc on wlan0
INFO:AtcdVService.AtcdLinuxShaper:deleting root QDisc on eth0
INFO:AtcdVService.AtcdLinuxShaper:setting root qdisc on eth0
INFO:AtcdVService.AtcdLinuxShaper:Restoring shaped connection from DB
ERROR:AtcdVService:Unexpected Exception during init
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/sparts/vservice.py", line 268, in _runloop
instance._createTasks()
File "/usr/local/lib/python2.7/dist-packages/sparts/vservice.py", line 167, in _createTasks
self.tasks.init()
File "/usr/local/lib/python2.7/dist-packages/sparts/vtask.py", line 332, in init
len(exceptions))
Exception: Unable to start service (1 task start errors)
INFO:AtcdVService:Received graceful shutdown request
DEBUG:AtcdVService:VService Active. Awaiting graceful shutdown.
INFO:AtcdVService:Waiting for tasks to shutdown gracefully...
DEBUG:AtcdVService:Waiting for <atcd.AtcdDeviceTimeoutTask.AtcdDeviceTimeoutTask object at 0x7ff244717bd0> to stop...
DEBUG:AtcdVService:Waiting for <atcd.backends.linux.AtcdLinuxShaper object at 0x7ff2447179d0> to stop...
DEBUG:AtcdVService:Waiting for <atcd.AtcdDBQueueTask.AtcdDBQueueTask object at 0x7ff244717950> to stop...
DEBUG:AtcdVService:Waiting for <atcd.AtcdThriftHandlerTask.AtcdNBServerTask object at 0x7ff2447178d0> to stop...
INFO:AtcdVService:Instance shut down gracefully

But I can do it normally:sudo python manage.py runserver 0.0.0.0:8000
Everything else is normal,
What's the reason.

[chantra]

error: [Errno 98] Address already in use

There is already another atcd process running.