Overflow mode `reject-publish` not respected by shovel

[johanrhodin]

Describe the bug
Sending messages with a shovel to a queue that is full (x-max-length has been reached) with x-overflow: "reject-publish" makes the shovel drain the upstream queue.

Describe your setup
LavinMQ 2.5.rc.2, 3-node cluster

How to reproduce
Run attached script, Fill q1 with 100k messages. The shovel should fill q2 with 100 messages and the rest should be kept in q2. Instead q1 is drained into the void.

lmq_reject-overflow.sh

[kickster97]

How does RabbitMQ handle this?

[johanrhodin]

It redelivers the messages to q1

[kickster97]

Maybe handle rapid redelivery in shovel, handle retries with some rate limit.