On 30.11.2015 14:28, Bogdan Dobrelya wrote: > Hello. > Please let's make this change [0] happen to the Oslo messaging. > This is reasonable, straightforward and backwards compatible change. And > it is required for OpenStack applications - see [1] - to implement a > sane HA. The only thing left is to cover this change by unit tests. > > [0] https://review.openstack.org/229186 > [1] > http://lists.openstack.org/pipermail/openstack-dev/2015-October/076217.html > Here is related bp [0]. I will submit the spec as well and put there all of the concerns Mehdi Abaakouk provided in the aforementioned patch review process. I believe the ack-then-process pattern *has* use cases, that is why this topic will be raised again and again unless adressed. [0] https://blueprints.launchpad.net/oslo.messaging/+spec/at-least-once-guarantee -- Best regards, Bogdan Dobrelya, Irc #bogdando