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[Rodolfo Alonso <1896217@xxxxxxxxxxxxxxxxxx>]

This bug is a duplicate of
https://bugs.launchpad.net/neutron/+bug/1881070.

** Changed in: neutron
       Status: Confirmed => Invalid

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Title:
  [OVS] When "explicitly_egress_direct" is enabled, egress flows are not
  deleted when the port is removed

Status in neutron:
  Invalid

Bug description:
  If "explicitly_egress_direct" is True, when a port is deleted, this is
  treated as "removed" [1]. That means this port won't be processed in
  [2]. That implies when a port is deleted, the explicit egress flows
  are left behind in br-int.

  If "explicitly_egress_direct" is True, when a port is deleted, as
  commented in the previous paragraph, the code does not delete the
  explicit egress flows. But could happen that this method could be
  called in the first polling cycle because the OVS agent has detected
  there is a deleted port. Then the OVS agent RPC server receives the
  port delete call [3], but this deleted port is treated in the next
  polling cycle. The "port_info" variable does not contain the deleted
  port (treated in the previous cycle). The code in [2] tries to read
  the port from the OVS DB, but is not there anymore and the OF deletion
  commands fail.

  This is related to https://bugs.launchpad.net/neutron/+bug/1732067 and
  https://review.opendev.org/#/q/efa8dd08957b5b6b1a05f0ed412ff00462a9f216.

  [1]https://github.com/openstack/neutron/blob/8575f60e86029cd91d5fa6f6be4596a22b1ee35b/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py#L676
  [2]https://github.com/openstack/neutron/blob/8575f60e86029cd91d5fa6f6be4596a22b1ee35b/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py#L685-L695
  [3]https://github.com/openstack/neutron/blob/8575f60e86029cd91d5fa6f6be4596a22b1ee35b/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py#L625-L628

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