Hi,
Some time ago oslo.messaging changed default value of the "heartbeat_in_pthread" config option to "True" [1]. As was noticed some time ago, this don't works well with nova-compute - see bug [2] for details. Recently we noticed in our downstream Red Hat OpenStack, that it's not only nova-compute which don't works well with it and can hangs. We saw the same issue in various neutron agent processes. And it seems that it can be the same for any non-wsgi service which is using rabbitmq to send heartbeats. So giving all of that, I just proposed change of the default value of that config option to be "False" again [3]. And my question is - would it be possible and acceptable to backport such change up to stable/wallaby (if and when it will be approved for master of course). IMO this could be useful for users as using this option set as "True" be default don't makes any sense for the non-wsgi applications really and may cause more bad then good things really. What are You opinions about it?
[1] https://review.opendev.org/c/openstack/oslo.messaging/+/747395 [2] https://bugs.launchpad.net/oslo.messaging/+bug/1934937 [3] https://review.opendev.org/c/openstack/oslo.messaging/+/852251/