rabbitmq-server start fails after brew install

[ari gold]

Hi there,

I try rabbitmq-server start but get

Feature flags: `implicit_default_bindings`: required feature flag not enabled! It must be enabled before upgrading RabbitMQ.

Failed to initialize feature flags registry.

I searched the mailing list and found a related thread but that just links to the release notes which links to a document stating that feature flags are required but doesn't say how to enable them.

I eventually found some documentation describing how to enable them but no luck.

I think what happened was that I had an older (pre 3.11) version installed which I've used for years but a different brew install caused a brew upgrade (again, I think). That took me to 3.11 and now I can't revert with homebrew. I think I need to revert to an earlier version to set the feature flags.

That said, I did a brew uninstall rabbitmq and tried reinstalling but no luck - I couldn't start the server (same error). Seems like a fresh install should work, no? Maybe because I have a configuration somewhere that stuck around between the uninstall and the reinstall?

Thanks !

[Michal Kuratczyk]

These feature flags have to be enabled before the upgrade. Since it seems to be a dev env, starting fresh is indeed the easiest.

Just remove the folder where RabbitMQ keeps its state. In my case that's /opt/homebrew/var/lib/rabbitmq/. Brew uninstall doesn't delete it.

Best,

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Michał

RabbitMQ team

[ari gold]

That did it, thanks!

Fwiw, it was /usr/local/var/lib/rabbitmq on my machine.