Hit this issue in [Build "Ubuntu 14.04 LTS" 2.0-22~juno] MultiNode Single Intf Sanity

While trying to spawn vm in testcase  'test_mx_gateway '

Topology : 
Config Nodes : [u'nodei11', u'nodei12'] 
Control Nodes : [u'nodei12', u'nodei13'] 
Compute Nodes : [u'nodei14', u'nodei15'] 
Openstack Node : nodei11 
WebUI Node : nodei11 
Analytics Nodes : [u'nodei11']


/var/log/nova/nova-compute.log :

2014-12-24 07:35:29.582 2180 AUDIT nova.compute.claims [req-f5ae398e-014f-4ab6-821e-deae98200d10 None] [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b] Claim successful
2014-12-24 07:35:29.754 2180 INFO nova.scheduler.client.report [req-f5ae398e-014f-4ab6-821e-deae98200d10 None] Compute_service record updated for ('nodei14', 'nodei14.englab.juniper.net')
2014-12-24 07:35:29.938 2180 INFO nova.scheduler.client.report [req-f5ae398e-014f-4ab6-821e-deae98200d10 None] Compute_service record updated for ('nodei14', 'nodei14.englab.juniper.net')
2014-12-24 07:35:30.524 2180 INFO nova.virt.libvirt.driver [req-f5ae398e-014f-4ab6-821e-deae98200d10 None] [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b] Creating image
2014-12-24 07:35:31.093 2180 INFO nova.scheduler.client.report [-] Compute_service record updated for ('nodei14', 'nodei14.englab.juniper.net')
2014-12-24 07:35:31.303 2180 INFO nova.virt.disk.vfs.api [req-f5ae398e-014f-4ab6-821e-deae98200d10 None] Unable to import guestfsfalling back to VFSLocalFS
2014-12-24 07:35:31.861 2180 ERROR root [-] Second simultaneous read on fileno 21 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)
2014-12-24 07:35:31.861 2180 TRACE root Traceback (most recent call last):
2014-12-24 07:35:31.861 2180 TRACE root   File "/usr/lib/python2.7/dist-packages/contrail_vrouter_api/vrouter_api.py", line 171, in periodic_connection_check
2014-12-24 07:35:31.861 2180 TRACE root     self._client.KeepAliveCheck()
2014-12-24 07:35:31.861 2180 TRACE root   File "/usr/lib/python2.7/dist-packages/contrail_vrouter_api/gen_py/instance_service/InstanceService.py", line 176, in KeepAliveCheck
2014-12-24 07:35:31.861 2180 TRACE root     return self.recv_KeepAliveCheck()
2014-12-24 07:35:31.861 2180 TRACE root   File "/usr/lib/python2.7/dist-packages/contrail_vrouter_api/gen_py/instance_service/InstanceService.py", line 186, in recv_KeepAliveCheck
2014-12-24 07:35:31.861 2180 TRACE root     (fname, mtype, rseqid) = self._iprot.readMessageBegin()
2014-12-24 07:35:31.861 2180 TRACE root   File "/usr/lib/python2.7/dist-packages/thrift/protocol/TBinaryProtocol.py", line 126, in readMessageBegin
2014-12-24 07:35:31.861 2180 TRACE root     sz = self.readI32()
2014-12-24 07:35:31.861 2180 TRACE root   File "/usr/lib/python2.7/dist-packages/thrift/protocol/TBinaryProtocol.py", line 206, in readI32
2014-12-24 07:35:31.861 2180 TRACE root     buff = self.trans.readAll(4)
2014-12-24 07:35:31.861 2180 TRACE root   File "/usr/lib/python2.7/dist-packages/thrift/transport/TTransport.py", line 58, in readAll
2014-12-24 07:35:31.861 2180 TRACE root     chunk = self.read(sz - have)
2014-12-24 07:35:31.861 2180 TRACE root   File "/usr/lib/python2.7/dist-packages/thrift/transport/TTransport.py", line 271, in read
2014-12-24 07:35:31.861 2180 TRACE root     self.readFrame()
2014-12-24 07:35:31.861 2180 TRACE root   File "/usr/lib/python2.7/dist-packages/thrift/transport/TTransport.py", line 275, in readFrame
2014-12-24 07:35:31.861 2180 TRACE root     buff = self.__trans.readAll(4)
2014-12-24 07:35:31.861 2180 TRACE root   File "/usr/lib/python2.7/dist-packages/thrift/transport/TTransport.py", line 58, in readAll
2014-12-24 07:35:31.861 2180 TRACE root     chunk = self.read(sz - have)
2014-12-24 07:35:31.861 2180 TRACE root   File "/usr/lib/python2.7/dist-packages/thrift/transport/TSocket.py", line 103, in read
2014-12-24 07:35:31.861 2180 TRACE root     buff = self.handle.recv(sz)
2014-12-24 07:35:31.861 2180 TRACE root   File "/usr/lib/python2.7/dist-packages/eventlet/greenio.py", line 262, in recv
2014-12-24 07:35:31.861 2180 TRACE root     timeout_exc=socket.timeout("timed out"))
2014-12-24 07:35:31.861 2180 TRACE root   File "/usr/lib/python2.7/dist-packages/eventlet/hubs/__init__.py", line 151, in trampoline
2014-12-24 07:35:31.861 2180 TRACE root     listener = hub.add(hub.READ, fileno, current.switch)
2014-12-24 07:35:31.861 2180 TRACE root   File "/usr/lib/python2.7/dist-packages/eventlet/hubs/epolls.py", line 48, in add
2014-12-24 07:35:31.861 2180 TRACE root     listener = BaseHub.add(self, evtype, fileno, cb)
2014-12-24 07:35:31.861 2180 TRACE root   File "/usr/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 126, in add
2014-12-24 07:35:31.861 2180 TRACE root     evtype, fileno, evtype))
2014-12-24 07:35:31.861 2180 TRACE root RuntimeError: Second simultaneous read on fileno 21 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)
2014-12-24 07:35:31.861 2180 TRACE root
2014-12-24 07:35:32.372 2180 ERROR nova.compute.manager [req-f5ae398e-014f-4ab6-821e-deae98200d10 None] [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b] Instance failed to spawn
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b] Traceback (most recent call last):
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 2234, in _build_resources
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]     yield resources
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 2104, in _build_and_run_instance
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]     block_device_info=block_device_info)
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 2622, in spawn
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]     block_device_info, disk_info=disk_info)
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 4424, in _create_domain_and_network
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]     self.plug_vifs(instance, network_info)
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 947, in plug_vifs
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]     self.vif_driver.plug(instance, vif)
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]   File "/usr/lib/python2.7/dist-packages/nova_contrail_vif/contrailvif.py", line 207, in plug
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]     **kwargs)
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]   File "/usr/lib/python2.7/dist-packages/contrail_vrouter_api/vrouter_api.py", line 132, in add_port
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]     result = self._client.AddPort([data])
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b] AttributeError: 'NoneType' object has no attribute 'AddPort'
2014-12-24 07:35:32.372 2180 TRACE nova.compute.manager [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b]
2014-12-24 07:35:32.444 2180 AUDIT nova.compute.manager [req-f5ae398e-014f-4ab6-821e-deae98200d10 None] [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b] Terminating instance
2014-12-24 07:35:32.460 2180 WARNING nova.virt.libvirt.driver [-] [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b] During wait destroy, instance disappeared.
2014-12-24 07:35:32.657 2180 INFO nova.virt.libvirt.driver [req-f5ae398e-014f-4ab6-821e-deae98200d10 None] [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b] Deleting instance files /var/lib/nova/instances/c13062f0-1fbc-4425-ae07-b4e8babe785b_del
2014-12-24 07:35:32.658 2180 INFO nova.virt.libvirt.driver [req-f5ae398e-014f-4ab6-821e-deae98200d10 None] [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b] Deletion of /var/lib/nova/instances/c13062f0-1fbc-4425-ae07-b4e8babe785b_del complete
2014-12-24 07:35:32.876 2180 INFO nova.scheduler.client.report [req-f5ae398e-014f-4ab6-821e-deae98200d10 None] Compute_service record updated for ('nodei14', 'nodei14.englab.juniper.net')
2014-12-24 07:35:32.950 2180 INFO nova.network.neutronv2.api [req-f5ae398e-014f-4ab6-821e-deae98200d10 None] [instance: c13062f0-1fbc-4425-ae07-b4e8babe785b] Unable to reset device ID for port None