[pletnes]

If you can’t deliver to the DLQ, then what? Then you’re missing messages either way. Who cares if it’s down this way or the other?

[xyzzy_plugh]

Not necessarily. If you can't deliver the message somewhere you don't ACK it, and the sender can choose what to do (retry, backoff, etc.)

Sure, it's unavailability of course, but it's not data loss.

[konart]

If you are reading from Kafka (for example) and you can't do anything with a message (broken json as an example) and you can't put it into a DLQ - you have not other option but to skip it or stop on it, no?

[RedShift1]

The point is to not take the whole server down with it. Keeps the other applications working.

[rbranson]

Sure, but you still need to design around this problem. It’s going to be a happy accident that everything turns out fine if you don’t.