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[Sean Dague <sean@xxxxxxxxx>]

Public bug reported:

This is similar to https://bugs.launchpad.net/tempest/+bug/1357055 which
is closed (and honestly would be confusing to make this the same bug).

When trying to tear down subnets, they sometimes fail because the port
still exists. However there is no indication that the port delete
failed.

2017-06-05 18:38:20.846777 | Captured traceback-1:
2017-06-05 18:38:20.846795 | ~~~~~~~~~~~~~~~~~~~~~
2017-06-05 18:38:20.846817 |     Traceback (most recent call last):
2017-06-05 18:38:20.846853 |       File "tempest/lib/common/utils/test_utils.py", line 84, in call_and_ignore_notfound_exc
2017-06-05 18:38:20.846890 |         return func(*args, **kwargs)
2017-06-05 18:38:20.846926 |       File "tempest/lib/services/network/subnets_client.py", line 52, in delete_subnet
2017-06-05 18:38:20.846949 |         return self.delete_resource(uri)
2017-06-05 18:38:20.846981 |       File "tempest/lib/services/network/base.py", line 41, in delete_resource
2017-06-05 18:38:20.847004 |         resp, body = self.delete(req_uri)
2017-06-05 18:38:20.847034 |       File "tempest/lib/common/rest_client.py", line 301, in delete
2017-06-05 18:38:20.847064 |         return self.request('DELETE', url, extra_headers, headers, body)
2017-06-05 18:38:20.847094 |       File "tempest/lib/common/rest_client.py", line 659, in request
2017-06-05 18:38:20.847117 |         self._error_checker(resp, resp_body)
2017-06-05 18:38:20.847149 |       File "tempest/lib/common/rest_client.py", line 780, in _error_checker
2017-06-05 18:38:20.847175 |         raise exceptions.Conflict(resp_body, resp=resp)
2017-06-05 18:38:20.847208 |     tempest.lib.exceptions.Conflict: An object with that identifier already exists
2017-06-05 18:38:20.847274 |     Details: {u'detail': u'', u'message': u'Unable to complete operation on subnet 276de24c-4560-47f5-9feb-2964314d7814: One or more ports have an IP allocation from this subnet.', u'type': u'SubnetInUse'}

http://logs.openstack.org/53/469253/1/gate/gate-tempest-dsvm-neutron-
linuxbridge-ubuntu-
xenial/64416cc/console.html#_2017-06-05_18_38_20_847274

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1696098

Title:
  Race in deleting ports during Tempest Runs

Status in neutron:
  New

Bug description:
  This is similar to https://bugs.launchpad.net/tempest/+bug/1357055
  which is closed (and honestly would be confusing to make this the same
  bug).

  When trying to tear down subnets, they sometimes fail because the port
  still exists. However there is no indication that the port delete
  failed.

  2017-06-05 18:38:20.846777 | Captured traceback-1:
  2017-06-05 18:38:20.846795 | ~~~~~~~~~~~~~~~~~~~~~
  2017-06-05 18:38:20.846817 |     Traceback (most recent call last):
  2017-06-05 18:38:20.846853 |       File "tempest/lib/common/utils/test_utils.py", line 84, in call_and_ignore_notfound_exc
  2017-06-05 18:38:20.846890 |         return func(*args, **kwargs)
  2017-06-05 18:38:20.846926 |       File "tempest/lib/services/network/subnets_client.py", line 52, in delete_subnet
  2017-06-05 18:38:20.846949 |         return self.delete_resource(uri)
  2017-06-05 18:38:20.846981 |       File "tempest/lib/services/network/base.py", line 41, in delete_resource
  2017-06-05 18:38:20.847004 |         resp, body = self.delete(req_uri)
  2017-06-05 18:38:20.847034 |       File "tempest/lib/common/rest_client.py", line 301, in delete
  2017-06-05 18:38:20.847064 |         return self.request('DELETE', url, extra_headers, headers, body)
  2017-06-05 18:38:20.847094 |       File "tempest/lib/common/rest_client.py", line 659, in request
  2017-06-05 18:38:20.847117 |         self._error_checker(resp, resp_body)
  2017-06-05 18:38:20.847149 |       File "tempest/lib/common/rest_client.py", line 780, in _error_checker
  2017-06-05 18:38:20.847175 |         raise exceptions.Conflict(resp_body, resp=resp)
  2017-06-05 18:38:20.847208 |     tempest.lib.exceptions.Conflict: An object with that identifier already exists
  2017-06-05 18:38:20.847274 |     Details: {u'detail': u'', u'message': u'Unable to complete operation on subnet 276de24c-4560-47f5-9feb-2964314d7814: One or more ports have an IP allocation from this subnet.', u'type': u'SubnetInUse'}

  http://logs.openstack.org/53/469253/1/gate/gate-tempest-dsvm-neutron-
  linuxbridge-ubuntu-
  xenial/64416cc/console.html#_2017-06-05_18_38_20_847274

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