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09:26:32.000000000","tz":120},"committer":{"name":"Slawek Kaplonski","email":"skaplons@redhat.com","date":"2022-04-05 11:03:35.000000000","tz":120},"subject":"Retry port_update in the OVN if revision mismatch during live-migration","message":"Retry port_update in the OVN if revision mismatch during live-migration\n\nThis is terrible hack but it seems that there is no other way to\nfix/workaround the race which may happen during live-migration between:\n- port update event comming from the OVN db (port DOWN on the src node),\n- API call from nova-compute to activate port binding on the destination\nnode.\n\nIf those 2 events will be executed in specific order by different\nworkers it may happen that port binding activation will not update\n\"requested_chassis\" of the port in OVN northd due to revision mismatch\n(ovn_revision and neutron_revision will be already bumped by the worker\nwhich processes \"port update\" OVN event).\nIf \"requested_chassis\" will not be updated, OVN will not claim port on\nthe dest node thus connectivity to the vm will be broken.\n\nTo workaround that issue, port_update_postcommit method from the OVN\nmechanism driver will catch RevisionMismatch exception raised by the\novn_client and in case that this was port_update after live_migration,\nwill get port data from neutron db and try to update port in the OVN\nnorthd once again.\n\nCloses-bug: #1967144\nChange-Id: If6e1c6e0fc772101bcd3427601800aaae84381dd\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/neutron/commit/4f75c6a616d3cb549153fcc496926358dfc9178a"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/neutron/commit/4f75c6a616d3cb549153fcc496926358dfc9178a"}]},"branch":"refs/heads/master"}},"requirements":[],"submit_records":[{"status":"CLOSED","labels":[{"label":"Verified","status":"OK","applied_by":{"_account_id":22348,"name":"Zuul","username":"zuul","tags":["SERVICE_USER"]}},{"label":"Code-Review","status":"OK","applied_by":{"_account_id":6773,"name":"Lucas Alvares Gomes","email":"lucasagomes@gmail.com","username":"lucasagomes"}},{"label":"Workflow","status":"OK","applied_by":{"_account_id":6773,"name":"Lucas Alvares 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