Hello. There are several concerns why we have to upgrade RabbitMQ to 3.4.0 [0]: 1) At least two bugfixes related to the current high-load issue with MQ [1]: - 26404 prevent queue synchronisation from hanging if there is a very short partition just as it starts (since 3.1.0) - 26368 prevent autoheal from hanging when loser shuts down before the winner learns it is the winner (since 3.1.0) 2) We should as well check how the new 'pause-if-all-down' option works for split brain recovery. 3) We should address the 'force_boot' recommendations from this mail thread [2] to speed up the MQ cluster assemble time. The question is - is it worth it to do this in the 6.1 release scope? I vote to postpone this for the 7.0 dev cycle as the impact of such changes might be unpredictable. [0] https://www.rabbitmq.com/release-notes/README-3.4.0.txt [1] https://bugs.launchpad.net/fuel/+bug/1447619 [2] http://www.mail-archive.com/openstack-dev@lists.openstack.org/msg51625.html -- Best regards, Bogdan Dobrelya, Skype #bogdando_at_yahoo.com Irc #bogdando