Hi
Ryu controller throws the following error when used with a large mininet
topology (240 switches,650 links) and hosts are unable to ping.
hub: uncaught exception: Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/ryu/lib/hub.py", line 52, in
_launch
func(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/ryu/lib/stplib.py", line 522, in
recalculate_spanning_tree
port.down(PORT_STATE_BLOCK, msg_init=init)
File "/usr/lib/python2.7/dist-packages/ryu/lib/stplib.py", line 785, in
down
self._change_status(state)
File "/usr/lib/python2.7/dist-packages/ryu/lib/stplib.py", line 861, in
_change_status
self.send_bpdu_thread.stop()
File "/usr/lib/python2.7/dist-packages/ryu/lib/stplib.py", line 1083, in
stop
hub.joinall([self.thread])
File "/usr/lib/python2.7/dist-packages/ryu/lib/hub.py", line 89, in
joinall
t.wait()
AttributeError: 'NoneType' object has no attribute 'wait'
There are loops in the topology and I am using simple_switch_stp.py for
this. The controller works fine with less number of switches for same
topology and ping works. Can anybody tell me what is the problem?
Best regards
Saddee
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