Probably, Ryu has been already running in other process.
$ ps auxww | grep -i ryu
You need to kill the process.
$ sudo kill -KILL <pid>
2015-07-07 23:55 GMT+09:00 Gautam Pathak <[email protected]>:
> Hi I am trying to run the simple_switch.py.
> as given in the tutorial I gave the following command:
>
> PYTHONPATH=. ./bin/ryu-manager ryu/app/simple_switch.py
>
> It starting working and give following
>
> loading app ryu/app/simple_switch.py
> loading app ryu.controller.ofp_handler
> instantiating app ryu.controller.ofp_handler of OFPHandler
> instantiating app ryu/app/simple_switch.py of SimpleSwitch
>
> then halt here for long not giving any other result.
>
> I abnormally terminate it and run again,
>
> It gives the following:
>
> mininet@mininet-VirtualBox:~/ryu$ PYTHONPATH=. ./bin/ryu-manager
> ryu/app/simple_switch.py
> loading app ryu/app/simple_switch.py
> loading app ryu.controller.ofp_handler
> instantiating app ryu.controller.ofp_handler of OFPHandler
> instantiating app ryu/app/simple_switch.py of SimpleSwitch
> hub: uncaught exception: Traceback (most recent call last):
> File "/home/mininet/ryu/ryu/lib/hub.py", line 52, in _launch
> func(*args, **kwargs)
> File "/home/mininet/ryu/ryu/controller/controller.py", line 71, in __call__
> self.server_loop()
> File "/home/mininet/ryu/ryu/controller/controller.py", line 94, in
> server_loop
> datapath_connection_factory)
> File "/home/mininet/ryu/ryu/lib/hub.py", line 108, in __init__
> self.server = eventlet.listen(listen_info)
> File "/usr/lib/python2.7/dist-packages/eventlet/convenience.py", line 38,
> in listen
> sock.bind(addr)
> File "/usr/lib/python2.7/socket.py", line 224, in meth
> return getattr(self._sock,name)(*args)
> error: [Errno 98] Address already in use
>
> I have no idea what is going on. Please give some suggestion.
>
>
>
>
> Best regards,
> Goutam
>
>
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