What happens if the message returns to MQ?

Question

I get a message from the WebPhere MQ queue. I am trying to handle, and if I get some exceptions, I want the message rolled back to the MQ queue.

I have no problem with this. What happens to the message? Does he go to the bottom of the line?

If I try to pull a message from the queue, do I get the same message as I rollbackback?

What kind of behavior can be? I want to know this behavior, usually in a scenario with a large queue size?

Rate any inputs.

Thanks Manglu

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