Queues running on 3 nodes instead of 5

[Azmi abdul rahman]

Hi,

We recently installed a fresh rabbitmq cluster on a fresh 5 rabbitmq nodes in kubernetes. But we noticed the newly created queues are running on 3 nodes instead of all 5 rabbitmq nodes.

We have a similar set up in production where all of the queues run on all 5 rabbitmq nodes.

Why the difference behavior? any ideas?

Rgds

azmi

[Michal Kuratczyk]

Hi,

I can't find the PR right now, but there was a bug in the past where x-quorum-initial-group-size was effectively ignored and if more nodes were available, the queue would start a member on each node. It could be that you are using an affected version and therefore by default, you get 5-member quorum queues.

Since the issue was fixed, it works the way it's documented: https://www.rabbitmq.com/quorum-queues.html#replication-factor,

so if you want 5-node quorum queues, you need to increase the initial group size (or use rabbitmq-queues grow for existing queues).

Best,

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Michał

RabbitMQ team

[Azmi abdul rahman]

Thank you Michal.

Rgds

azmi