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[Miguel Lavalle <miguel@xxxxxxxxxxxx>]

Not seen over the past 4 weeks by triggering tests with this patchset:
https://review.openstack.org/#/c/374106

** Changed in: neutron
       Status: In Progress => Invalid

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https://bugs.launchpad.net/bugs/1609540

Title:
  Deleting csnat port fails due to no fixed ips

Status in neutron:
  Invalid

Bug description:
  This code [1] ends up emitting an "IndexError: list index out of
  range" exception that ends up with a trace like this [2]. Essentially,
  there are no fixed ips on the port. Not sure yet how it got in to this
  state. This failure is linked to various tempest failures in gate-
  tempest-dsvm-neutron-dvr and gate-tempest-dsvm-neutron-dvr-multinode-
  full. Here are tests which have failed due to this. This logstash [3]
  finds them.

  tempest.scenario.test_network_v6.TestGettingAddress.test_dualnet_multi_prefix_dhcpv6_stateless
  tempest.scenario.test_network_v6.TestGettingAddress.test_dualnet_multi_prefix_slaac

  [1] https://github.com/openstack/neutron/blob/5e8b8274fe94ca9eafbfe951134326df3a60373d/neutron/db/l3_dvr_db.py#L906
  [2] http://paste.openstack.org/show/547840/
  [3] http://logstash.openstack.org/#dashboard/file/logstash.json?query=message%3A%5C%22if%20p%5B'fixed_ips'%5D%5B0%5D%5B'subnet_id'%5D%20%3D%3D%20subnet_id%5C%22

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