In what version(s) of Spring AMQP are you seeing this issue?

3.5.3

Describe the bug

This bug is about MessageRejectedWhileStoppingException which leads to an error log being emitted which I believe should be of lower severity: info or warning (I leave that decision to the maintainers).

This bug can would be best described by @artembilan's answer to a Stack Overflow question I raised:

I'm wondering from reading the documentation whether this is an error or sort of a notification that a message was requeued, and if it's the latter, why is it logged as an error?

Yes, feels like that. Because the logic there is like this:

/**
* Determine whether a message should be requeued; returns true if the throwable is a
* {@link MessageRejectedWhileStoppingException} or defaultRequeueRejected is true and
* there is not an {@link AmqpRejectAndDontRequeueException} in the cause chain or if
* there is an {@link ImmediateRequeueAmqpException} in the cause chain.
* @param defaultRequeueRejected the default requeue rejected.
* @param throwable the throwable.
* @param logger the logger to use for debug.
* @return true to requeue.
*/
public static boolean shouldRequeue(boolean defaultRequeueRejected, Throwable throwable, Log logger) {
   boolean shouldRequeue = defaultRequeueRejected ||
           throwable instanceof MessageRejectedWhileStoppingException;

So, the failed to be processed message in that stopping case is indeed requeued.

Looks like there is a race condition just after we cancel consumer and such an in-flight message. So, we are > able to mark this consumer as stopped as a reaction to the cancelOK reply, but the last in-flight message > is still in a handleDelivery process.

So, probably we cannot mitigate that race condition, but we indeed can fix that:

 this.logger.error("Failed to invoke listener", e);

To be info for this specific MessageRejectedWhileStoppingException.

If that makes sense for you, please, raise a GH issue and we will fix ASAP.

It definitely makes sense to me that if this is not a very bad thing (like the message getting lost due to ungraceful shutdown), it shouldn't be logged as an error.

I'm not sure what @artembilan is referring to when he writes "this specific MessageRejectedWhileStoppingException" so I phrased my title defensively. I don't know if MessageRejectedWhileStoppingException is always acceptable, or if there is a specific MessageRejectedWhileStoppingException (that I'm definitely encountering) that is acceptable.

To Reproduce

Orderly shutdown of Spring application while messages are in flight.

Expected behavior

A clear and concise description of what you expected to happen.

Sample

N/A.