RabbitMQ does not start after upgrade to 3.11.1-1 on Debian Buster

[William Thomas]

After upgrading rabbitmq-server from 3.10.8-1 to 3.11.1-1, RabbitMQ no longer starts.

The error is
Oct  1 10:10:05 rmq001-ed2prd rabbitmq-server[7511]: 2022-10-01 10:10:05.806947-05:00 [error] <0.230.0> Feature flags: `implicit_default_bindings`: required feature flag not enabled! It must be enabled before upgrading RabbitMQ.
Oct  1 10:10:05 rmq001-ed2prd rabbitmq-server[7511]: 2022-10-01 10:10:05.816830-05:00 [error] <0.230.0> Failed to initialize feature flags registry: {disabled_required_feature_flag,
Oct  1 10:10:05 rmq001-ed2prd rabbitmq-server[7511]: 2022-10-01 10:10:05.816830-05:00 [error] <0.230.0>                                               implicit_default_bindings}

From what I could see, I should be able to add that feature flag by setting an environment variable at startup, such as RABBITMQ_FEATURE_FLAGS=implicit_default_bindings

I tried that, and received the exact same error.  

This occurred on multiple machines for me last night, during our normal upgrade window, and I ended up reverting out the upgrade to get them functioning again.

[Michal Kuratczyk]

Hi,

This is documented in the release notes:

https://github.com/rabbitmq/rabbitmq-server/blob/main/release-notes/3.11.0.md#required

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Michał

RabbitMQ team

[Christopher Hartley]

I get the following error attached when upgrading to Rabbit MQ version 23.11.1 and Erlang 25.1.1

The Rabbit MQ Service does not start.

[Luke Bakken]

Hi Christopher,

Please start a new discussion as what you report is not related to the original issue.