"2015-03-30 12:12:17.483 TRACE neutron.agent.ovsdb.impl_vsctl RuntimeError: Second simultaneous read on fileno 6 detected.  Unless you really know what you're doing, make sure that only one greenthread can read any particular socket.  Consider using a pools.Pool. If you do know what you're doing and want to disable this error, call eventlet.debug.hub_prevent_multiple_readers(False) - MY THREAD=<built-in method switch of GreenThread object at 0x7f60b4975870>; THAT THREAD=FdListener('read', 6, <built-in method switch of GreenThread object at 0x7f60b49757d0>, <built-in method throw of GreenThread object at 0x7f60b49757d0>)
2015-03-30 12:12:17.483 TRACE neutron.agent.ovsdb.impl_vsctl
2015-03-30 12:12:17.486 ERROR oslo_messaging.rpc.dispatcher [req-502a6f56-ef99-4054-996a-8f333f7a8fc8 TestNetworkBasicOps-1406445239 7bd5dd4d7ee44a19aaaacf16df4fef9f] Exception during message handling: 'NoneType' object is not iterable
2015-03-30 12:12:17.486 TRACE oslo_messaging.rpc.dispatcher Traceback (most recent call last):
2015-03-30 12:12:17.486 TRACE oslo_messaging.rpc.dispatcher   File ""/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py"", line 142, in _dispatch_and_reply
2015-03-30 12:12:17.486 TRACE oslo_messaging.rpc.dispatcher     executor_callback))
2015-03-30 12:12:17.486 TRACE oslo_messaging.rpc.dispatcher   File ""/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py"", line 186, in _dispatch
2015-03-30 12:12:17.486 TRACE oslo_messaging.rpc.dispatcher     executor_callback)
2015-03-30 12:12:17.486 TRACE oslo_messaging.rpc.dispatcher   File ""/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py"", line 130, in _do_dispatch
2015-03-30 12:12:17.486 TRACE oslo_messaging.rpc.dispatcher     result = func(ctxt, **new_args)
2015-03-30 12:12:17.486 TRACE oslo_messaging.rpc.dispatcher   File ""/usr/lib/python2.7/site-packages/networking_ovs_dpdk/agent/ovs_dpdk_neutron_agent.py"", line 337, in port_delete
2015-03-30 12:12:17.486 TRACE oslo_messaging.rpc.dispatcher     port = self.int_br.get_vif_port_by_id(port_id)
2015-03-30 12:12:17.486 TRACE oslo_messaging.rpc.dispatcher   File ""/opt/stack/neutron/neutron/agent/common/ovs_lib.py"", line 383, in get_vif_port_by_id
2015-03-30 12:12:17.486 TRACE oslo_messaging.rpc.dispatcher     for port in ports:
2015-03-30 12:12:17.486 TRACE oslo_messaging.rpc.dispatcher TypeError: 'NoneType' object is not iterable
2015-03-30 12:12:17.486 TRACE oslo_messaging.rpc.dispatcher
"