Good morning,
I am having an issue upgrading 2 of the 3 nodes on my RabbitMQ 3.12.8 to 3.13.6 Clusters.
Background:
Node 1 “main” cluster RabbitMQ 3.12.8 Windows 11
Node 2 cluster RabbitMQ 3.12.8 Windows 10
Node 3 cluster RabbitMQ 3.12.8 Windows 10
Each node when I launch the RabbitMQ website, I can see all 3 clusters and there are all working properly
I upgrade Node 1 from RabbitMQ 3.12.8 to 3.13.6 and Erlang 26.2.5.2, successful and the 2 other nodes in the Cluster are all in the green in the RabbitMQ website. However there are Feature Flags that are disabled:

I try to enable them and I can’t…
I then upgrade Node 2 to RabbitMQ 3.13.6 but it fails
I then upgrade Node 3 to RabbitMQ 3.13.6 but it fails:
Both fail with this error:

Is there any documentation on upgrading clusters?
Do I need to turn off the RabbitMQ Service on all 3 nodes when doing upgrades?
Thank you,
Steven Ogilvie
Software Developer, SCMT - Builds & Installers
I am presuming stop the node is to run the RabbitMQ sbin dir cmd prompt and run “rabbitmqctl.bat stop_app” ?
Again the 1st Node upgraded without any issues, but Node 2 and Node 3 failed…
it seems to be stuck in “is booting”
I got the error:
![]()
Thanks,
Steven
ps. I have found some documentation from
https://myadventuresincoding.wordpress.com/2021/05/13/rabbitmq-how-to-do-a-rolling-upgrade-in-a-cluster-version-3-8/
that states if Erlang needs to be updated (different version) you actually have to uninstall erlang and RabbitMQ and install erlang and RabbitMQ and for the 2 other nodes you need to rejoin the cluster??
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