I have a scenario of Pub/Sub with ordered messages and a Dead Letter queue. Do all the ordered messages land on a Dead Letter queue or just the one of the Ordered messages, that is not able to be processed, lands individually on the DL Queue.
Right now, it should not be possible to set up a dead letter queue on a subscription that has message ordering enabled. The reason is that dead letter queues are best effort and so it's possible that the redelivery of a message would not be consistent if it was going to be moved to the dead letter topic, which could violate the ordering guarantees.