priority verified
Queue priority
Priority within the sending queue — ignored unless the queue was declared with priority support.
In detail
A property that silently does nothing on a stock node: rabbitmq-maxpriority ships at zero, and a queue's priority support cannot be added after the queue exists. So using priorities is a decision taken before the first message, not after. It would be the clean way to let transactional mail overtake a bulk campaign on a shared node, and that is the argument for making the decision deliberately rather than discovering it later.
What happens if you get it wrong
Set on a node whose queues have no priority support.Silently ignored — no error, no effect, and the sender believes ordering is in force.taken from the build · inference