Reviewed: https://review.opendev.org/c/openstack/neutron/+/817637 Committed: https://opendev.org/openstack/neutron/commit/7e2f73350ffdc90f7b340788db36edc439f96f6e Submitter: "Zuul (22348)" Branch: master
commit 7e2f73350ffdc90f7b340788db36edc439f96f6e Author: Daniel Speichert <[email protected]> Date: Thu Nov 11 13:18:49 2021 -0500 [OVN] Fix deadlock in neutron_ovn_db_sync_util.py A feature to synchronize OVN DB connections when handling events introduced in 90980f496cfa3cc5df1c93cf834a44f33d3f1f6f is not applicable to the offline sync process executed by this utility. Closes-bug: #1950679 Change-Id: Iac4eb364bfc1c44f5d4526bae71967bede29cc36 ** Changed in: neutron Status: In Progress => Fix Released -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1950679 Title: [ovn] neutron_ovn_db_sync_util hangs on sync_routers_and_rports Status in neutron: Fix Released Bug description: neutron-ovn-db-sync-util hangs in certain scenarios while running sync_routers_and_rports. Specifically, it seems to be hanging on self.l3_plugin.get_routers(ctx) -> model_query.get_collection(...) of get_routers(...) in neutron.db.l3_db.py -> get_collection(...) in neutron_lib.db.model_query.py runs dict_funcs which somehow reaches to nb_ovn property accessor in neutron.plugins.ml2.drivers.ovn.mech_driver.mech_driver.py -> which runs self._post_fork_event.wait() That mutex seems to never be "set" and blocks further execution because it might not be applicable to this flow. It looks like the neutron-ovn-db-sync-util might need to always "set" it since it mocks other parts of the NB/DB client in a similar fashion to some unit tests. I'm not yet sure what kind of exact circumstances lead to that access and that wait(), syncing via the util to an empty OVN NB/DB seems to work. I see the issue more frequently on subsequent runs. To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1950679/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
