Required feature flags in RabbitMQ 3.11.0
RabbitMQ 3.11.0 will make all feature flags introduced during the life of RabbitMQ 3.8.x required.
People who initially created clusters using RabbitMQ 3.8.9 or older should enable all feature flags before upgrading to RabbitMQ 3.11! If the feature flags are not enabled, RabbitMQ 3.11.0+ will refuse to start.