Reviewed: https://review.opendev.org/c/openstack/neutron/+/860934 Committed: https://opendev.org/openstack/neutron/commit/b7b8f7c571440577a40aacf9d8d93abc3a5a48b3 Submitter: "Zuul (22348)" Branch: master
commit b7b8f7c571440577a40aacf9d8d93abc3a5a48b3 Author: Lucas Alvares Gomes <[email protected]> Date: Tue Oct 11 11:08:23 2022 +0100 [OVN] Avoid deadlock when cleaning hash ring nodes This patch avoids the clash of the hash ring cleaning operation and the API workers by ensuring that the cleaning happens before the nodes for that host are added to the ring and the connections to the OVSDBs (meaning no events therefore no SELECTS on the hash ring table for that hostname). This patch does this by re-using the same hash ring lock that starts the probing thread. Now, the first worker that acquire the lock is responsible for cleaning the hash ring for it's own host as well as starting the probing thread. Subsequently workers only need to register themselves to the hash ring. Change-Id: Iba73f7944592a003232eb397ba1d4da3dcba5c3a Closes-Bug: #1990174 Signed-off-by: Lucas Alvares Gomes <[email protected]> ** 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/1990174 Title: [OVN] Deadlock when starting neutron server, during the OVN hash ring deletion Status in neutron: Fix Released Bug description: Related bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2125842 Description of problem: Neutron server often fails to start and systemd needs to restart it. This is a problem at scale because all workers need to reconnect again to the OVN DBs. How reproducible: 50% Steps to Reproduce: 1. Start neutron server Error log: https://paste.opendev.org/show/bm3jZZ1oWX7ihK8JXzdE/ To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1990174/+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
