How to cancel tasks that are already in the queue?

Question

Message Queues

Service A creates tasks for service B, which executes them and returns the result back to service A. It works on queues. At any time, service A may decide that some of the tasks already sent to B are rotten and do not need to be performed. But they are already in the queue mixed with actual tasks. How is it smarter/easier to make service B ignore such tasks and not waste resources on them? Surely there is some more or less generally accepted approach.

Answer 1

any task added to the queue has an ID

Answer 2

No way. Only messages that need to be processed should be in the queue. Not for that you from use. If it’s more convenient for you to do this, then add storage with locks, and if it is there, then the message should be ignored, and the label from the lock should be erased