Hi all:
I'm developing a neutron agent based on ryu controller.
I found ryu controller randomly hang when doing stress test, below is
the stacktrace of hanged greenthread:
------ Green Thread ------
/usr/lib/python2.7/dist-packages/eventlet/greenthread.py:194 in main
`result = function(*args, **kwargs)`
/usr/lib/python2.7/dist-packages/ryu/lib/hub.py:52 in _launch
`func(*args, **kwargs)`
/usr/lib/python2.7/dist-packages/ryu/base/app_manager.py:274 in _event_loop
`handler(ev)`
/usr/lib/python2.7/dist-packages/neutron/plugins/ofagent/agent/ofa_neutron_agent.py:713
in _packet_in_handler
`self.agent._of_packet_in(ev)`
/usr/lib/python2.7/dist-packages/neutron/common/log.py:34 in wrapper
`return method(*args, **kwargs)`
/usr/lib/python2.7/dist-packages/neutron/plugins/ofagent/agent/ofa_neutron_agent.py:1028
in _of_packet_in
`self.remove_flows(ofpp.OFPMatch(eth_src=p_ether.dst))`
/usr/lib/python2.7/dist-packages/neutron/plugins/ofagent/agent/ofa_neutron_agent.py:883
in remove_flows
`ryu_api.send_msg(app=self.ryuapp, msg=flow)`
/usr/lib/python2.7/dist-packages/ryu/app/ofctl/api.py:65 in send_msg
`reply_multi=reply_multi))()`
/usr/lib/python2.7/dist-packages/ryu/base/app_manager.py:265 in send_request
`return req.reply_q.get()`
/usr/lib/python2.7/dist-packages/eventlet/queue.py:298 in get
`return waiter.wait()`
/usr/lib/python2.7/dist-packages/eventlet/queue.py:129 in wait
`return get_hub().switch()`
/usr/lib/python2.7/dist-packages/eventlet/hubs/hub.py:187 in switch
`return self.greenlet.switch()`
the green thread will hang for days never recover. I have several
green thread sending openflow commands, I don't know if it is causing
problems
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