Description of problem: OVN migration hangs on "Sync neutron db with OVN db" task. Dowstream CI job is not able to complete OVN migration during 10 hours and then timeouts. From the ovn migration tool log: TASK [migration : Sync neutron db with OVN db (container) - Run 1] ************* task path: /home/stack/ovn_migration/playbooks/roles/migration/tasks/sync-dbs.yml:7 Wednesday 02 November 2022 19:15:38 +0000 (0:00:01.182) 0:45:48.529 **** META: noop META: noop We had the similar situation with OSP17.0 and the reason was a regression caused by https://review.opendev.org/c/openstack/neutron/+/781555 and it was fixed upstream by https://review.opendev.org/c/openstack/neutron/+/817637 and/or https://review.opendev.org/c/openstack/neutron/+/805768 Version-Release number of selected component (if applicable): RHOS-16.2-RHEL-8-20221026.n.1 python3-networking-ovn-migration-tool-7.4.2-2.20220409154863.el8ost.noarch openstack-tripleo-heat-templates-11.6.1-2.20221010235131.e0d438c.el8ost.noarch How reproducible: 100% Steps to Reproduce: 1.Deploy OSP16.2 HA environment (3 controllers+ 2 computes) with ML2OVS neutron backend 2. Create a workload, router, network, VM connected to the network 3. Try to run migration to ML2OVN according to the official procedure https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/16.2/html-single/migrating_the_networking_service_to_the_ml2ovn_mechanism_driver/index Actual results: OVN migration script get stuck on "Sync neutron db with OVN db" task. Expected results: OVN migration does not get stuck and finishes successfully. Additional info:
*** Bug 2143740 has been marked as a duplicate of this bug. ***
Verified on puddle RHOS-16.2-RHEL-8-20221124.n.1 which uses python3-networking-ovn-7.4.2-2.20220409154865.el8ost.noarch.rpm Verified that during downstream ovs2ovn CI jobs the issue does not happen.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Release of components for Red Hat OpenStack Platform 16.2.4), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2022:8794