Hi everybody, I am testing topology discovery with Ryu in Mininet. I have
written an application that implements the topology discovery by defining
methods that listen for events EventSwitchEnter, EventSwitchLeave, EventLinkAdd
and EventLinkDelete. While the application works fine (in other words, it
correctly discovers all the switches of the network and their connections) whit
a low number of switches (<10), when I create network topologies with a higher
number of switch I obtain the following error:
hub: uncaught exception: Traceback (most recent call last): File
"/usr/local/lib/python2.7/dist-packages/ryu/lib/hub.py", line 53, in _launch
func(*args, **kwargs) File
"/usr/local/lib/python2.7/dist-packages/ryu/controller/controller.py", line
103, in deactivate method(self) File
"/usr/local/lib/python2.7/dist-packages/ryu/controller/controller.py", line
207, in _send_loop self.socket.sendall(buf) File
"/usr/local/lib/python2.7/dist-packages/eventlet/greenio/base.py", line 376, in
sendall tail = self.send(data, flags) File
"/usr/local/lib/python2.7/dist-packages/eventlet/greenio/base.py", line 359, in
send total_sent += fd.send(data[total_sent:], flags) error: [Errno 32]
Broken pipe I don't understand if this error depends on my code, which I
haven't posted in this message because of its length but I will do if it is
allowed, or it depends on performance of the controller or the network
emulator. Thanks in advance, YF
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