[Bug 1959441] Re: ovn-controller crashing with "failed in flood_remove_flows_for_sb_uuid()"

[Chris Valean]

repro steps attached

** Attachment added: "repro 1959441"
   https://bugs.launchpad.net/cloud-archive/+bug/1959441/+attachment/5564953/+files/repro_1959441.sh

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https://bugs.launchpad.net/bugs/1959441

Title:
  ovn-controller crashing with "failed in
  flood_remove_flows_for_sb_uuid()"

Status in Ubuntu Cloud Archive:
  New
Status in ovn package in Ubuntu:
  Confirmed

Bug description:
  ovn-controller crashes and restarts under a Kolla Openstack deployment.
  Link to RedHat bug report: https://bugzilla.redhat.com/show_bug.cgi?id=1928012

  2022-01-28T13:50:11.460Z|00076|util|EMER|controller/ofctrl.c:1198: assertion ovs_list_is_empty(&f->list_node) failed in flood_remove_flows_for_sb_uuid()
  2022-01-28T13:50:13.050Z|00001|vlog|INFO|opened log file /var/log/kolla/openvswitch/ovn-controller.log

  This problem seems to be addressed on the ovn repository with later releases:
  https://github.com/ovn-org/ovn/commit/858d1dd716db1a1e664a7c1737fd34f04fcbda5e added in v21.03.0
  https://github.com/ovn-org/ovn/commit/c6c61b4e3462fb5201a61a226c2acaf6f4caf917 added in v21.06.0

  Ubuntu version 20.04.3 LTS
  Packages:
  ovn-host 20.12.0-0ubuntu2~cloud0
  ovn-common 20.12.0-0ubuntu2~cloud0

  Latest Candidate: 20.12.0-0ubuntu3~cloud0 from http://ubuntu-
  cloud.archive.canonical.com/ubuntu focal-updates/wallaby/main amd64
  Packages does not have the patches backported in the changelog.

  Is there any plan to include/backport this for the next update to the
  20.12.0 package?

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