[Bug 1955578] Re: OVN transaction could not be completed due to a race condition

[Andreas Hasenack]

Hello Arnau, or anyone else affected,

Accepted neutron into focal-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/neutron/2:16.4.2-0ubuntu6.4 in a
few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
focal to verification-done-focal. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-focal. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: neutron (Ubuntu Focal)
       Status: Triaged => Fix Committed

** Tags added: verification-needed verification-needed-focal

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https://bugs.launchpad.net/bugs/1955578

Title:
  OVN transaction could not be completed due to a race condition

Status in Ubuntu Cloud Archive:
  Fix Released
Status in Ubuntu Cloud Archive ussuri series:
  Triaged
Status in Ubuntu Cloud Archive victoria series:
  Triaged
Status in neutron:
  Fix Released
Status in neutron package in Ubuntu:
  Fix Released
Status in neutron source package in Focal:
  Fix Committed

Bug description:
  When executing the test "test_connectivity_through_2_routers" it is highly possible to have
  a race condition:

  networking_ovn.common.exceptions.RevisionConflict: OVN revision number
  for {PORT_ID} (type: ports) is equal or higher than the given
  resource. Skipping update.

  Bugzilla reference:
  https://bugzilla.redhat.com/show_bug.cgi?id=1860448

  ===== Ubuntu SRU Details =====
  [Impact]
  See bug description.

  [Test Case]
  Deploy openstack with OVN. Run the test_connectivity_through_2_routers test from https://github.com/openstack/neutron-tempest-plugin. This could also be tested manually based on what that test does. Ensure the router port status is not set to DOWN at any point.

  [Where problems could occur]
  The existing bug could still occur if the assumpion that specifying the port type is not correct. Presumably this is not the case, but that is a theoritical potential for where problems could occur. All of these patches have already landed in the corresponding upstream branches.

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