Right now, probing the hash ring nodes happens as part of the maintenance task thread but this thread is only started after we establish a connection with the OVSDB servers in the post_fork_initialize() method for ML2/OVN. If this connection with OVSDB takes longer than expected, it's possible that the nodes in the hash ring (that have to be added prior to this connection) will time out because the maintenance task thread has not yet being started. Ideally, we would need to separate the probing to it's own periodic thread that is started before the connections with the OVSDBs to avoid this problem. This BZ is related to the initial work done at: https://bugzilla.redhat.com/show_bug.cgi?id=2125828
This will be fixed in 16.2 - bug 2134365
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 (Red Hat OpenStack Platform 16.1.9 bug fix and enhancement advisory), 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-2022:8795