RabbitMQ dead letter exchange never getting messages

Question

I\'m trying to setup my first RabbitMQ dead letter exchange, here are the steps I\'m using through the web admin interface:

1. Create new DIRECT exchange with the

Answer 1

In my case the problem was because the queue had

ackMode="MANUAL"

But I never set it (because a runtime exception), use Defaul ACK instead.