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Reviewed:  https://review.openstack.org/368079
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=6a2691cf6db1d1f4e4f5dd9e758c0d42f235478d
Submitter: Jenkins
Branch:    master

commit 6a2691cf6db1d1f4e4f5dd9e758c0d42f235478d
Author: Matt Riedemann <mriedem@xxxxxxxxxx>
Date:   Fri Sep 9 11:20:59 2016 -0400

    neutron: don't trace on port not found when unbinding ports
    
    There is a race in the gate when deleting an instance and
    deallocating the network at the same time that preexisting
    ports attached to the instance are being deleted. So when
    nova goes to unbind the port it's already gone and we log
    an exception trace in the n-cpu logs. We shouldn't actually
    care if the port isn't found when unbinding it from an instance,
    so this change handles that case and logs it at debug rather
    than an exception trace.
    
    Change-Id: Ia95c626cefcb1e099e11d3bf5a651ad5d5f9406f
    Closes-Bug: #1621883


** Changed in: nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1621883

Title:
  PortNotFoundClient stacktrace in n-cpu when unbinding ports

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  Saw this in a CI run today:

  http://logs.openstack.org/07/367307/1/check/gate-tempest-dsvm-neutron-
  full-ubuntu-
  xenial/cf54759/logs/screen-n-cpu.txt.gz?level=TRACE#_2016-09-08_12_05_26_139

  We shouldn't stacktrace on a 404 port not found when unbinding ports
  from an instance (that is probably be deleted).

  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api [req-aef4186a-7fdb-4e62-a4b1-ec7482db7e5b tempest-AttachInterfacesTestJSON-554004321 tempest-AttachInterfacesTestJSON-554004321] Unable to clear device ID for port '6dff1db9-e6e1-490b-9246-ea479281b3ff'
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api Traceback (most recent call last):
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api   File "/opt/stack/new/nova/nova/network/neutronv2/api.py", line 434, in _unbind_ports
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api     port_client.update_port(port_id, port_req_body)
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api   File "/opt/stack/new/nova/nova/network/neutronv2/api.py", line 94, in wrapper
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api     ret = obj(*args, **kwargs)
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api   File "/usr/local/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 754, in update_port
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api     return self.put(self.port_path % (port), body=body)
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api   File "/opt/stack/new/nova/nova/network/neutronv2/api.py", line 94, in wrapper
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api     ret = obj(*args, **kwargs)
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api   File "/usr/local/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 369, in put
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api     headers=headers, params=params)
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api   File "/opt/stack/new/nova/nova/network/neutronv2/api.py", line 94, in wrapper
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api     ret = obj(*args, **kwargs)
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api   File "/usr/local/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 337, in retry_request
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api     headers=headers, params=params)
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api   File "/opt/stack/new/nova/nova/network/neutronv2/api.py", line 94, in wrapper
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api     ret = obj(*args, **kwargs)
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api   File "/usr/local/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 300, in do_request
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api     self._handle_fault_response(status_code, replybody, resp)
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api   File "/opt/stack/new/nova/nova/network/neutronv2/api.py", line 94, in wrapper
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api     ret = obj(*args, **kwargs)
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api   File "/usr/local/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 275, in _handle_fault_response
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api     exception_handler_v20(status_code, error_body)
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api   File "/usr/local/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 91, in exception_handler_v20
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api     request_ids=request_ids)
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api PortNotFoundClient: Port 6dff1db9-e6e1-490b-9246-ea479281b3ff could not be found.
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api Neutron server returns request_ids: ['req-8350bbd5-d45b-4e59-a8a5-5d232faa45c1']
  2016-09-08 12:05:26.139 17305 ERROR nova.network.neutronv2.api

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