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[Lucian Petrut <lpetrut@xxxxxxxxxxxxxxxxxxxxxx>]

** Also affects: os-win
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1761748

Title:
  hyperv: Unable to get ports details for devices: AttributeError:
  'NoneType' object has no attribute 'startswith'

Status in networking-hyperv:
  New
Status in neutron:
  Confirmed
Status in os-win:
  New

Bug description:
  In a failed hyperv CI run I'm seeing this in the hyperv agent logs:

  http://cloudbase-ci.com/nova/324720/5/Hyper-
  V_logs/192.168.3.143-compute01/neutron-hyperv-agent.log.gz

  2018-04-06 02:43:29.230 588 91983184 MainThread INFO networking_hyperv.neutron.agent.layer2 [-] Hyper-V VM vNIC added: 5d31e08c-957c-45a5-a13d-fa114ea68b56
  2018-04-06 02:43:29.230 588 91983184 MainThread INFO networking_hyperv.neutron.agent.layer2 [-] Hyper-V VM vNIC added: None
  2018-04-06 02:43:29.246 588 91983184 MainThread INFO networking_hyperv.neutron.agent.layer2 [-] Hyper-V VM vNIC added: None
  2018-04-06 02:43:29.246 588 91983184 MainThread INFO networking_hyperv.neutron.agent.layer2 [-] Hyper-V VM vNIC added: None
  2018-04-06 02:43:29.262 588 91983184 MainThread INFO networking_hyperv.neutron.agent.layer2 [-] Hyper-V VM vNIC added: None
  2018-04-06 02:43:30.496 588 35292864 MainThread DEBUG networking_hyperv.neutron.agent.layer2 [req-1c72ef49-f85f-4776-8219-ac410b3a00e6 - - - - -] Agent loop has new devices! _work c:\openstack\build\networking-hyperv\networking_hyperv\neutron\agent\layer2.py:427
  2018-04-06 02:43:30.526 588 35292864 MainThread DEBUG networking_hyperv.neutron.agent.layer2 [req-1c72ef49-f85f-4776-8219-ac410b3a00e6 - - - - -] Unable to get ports details for devices set([u'5d31e08c-957c-45a5-a13d-fa114ea68b56', None]): 'NoneType' object has no attribute 'startswith'
  Traceback (most recent call last):

    File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 163, in _process_incoming
      res = self.dispatcher.dispatch(message)

    File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 220, in dispatch
      return self._do_dispatch(endpoint, method, ctxt, args)

    File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 190, in _do_dispatch
      result = func(ctxt, **new_args)

    File "/opt/stack/neutron/neutron/plugins/ml2/rpc.py", line 157, in get_devices_details_list
      for device in kwargs.pop('devices', [])

    File "/opt/stack/neutron/neutron/plugins/ml2/rpc.py", line 80, in get_device_details
      port_id = plugin._device_to_port_id(rpc_context, device)

    File "/opt/stack/neutron/neutron/plugins/ml2/plugin.py", line 1864, in _device_to_port_id
      if device.startswith(prefix):

  AttributeError: 'NoneType' object has no attribute 'startswith'
   _treat_devices_added c:\openstack\build\networking-hyperv\networking_hyperv\neutron\agent\layer2.py:360

  In this test run, the nova-compute service is also being reported as
  down, so the nova-scheduler is filtering it out and all server build
  requests fail. I don't know if the two are related, but thta's how I
  stumbled onto this error in the hyperv agent logs.

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