[rabbitmq-discuss] Query on bulk acknowledgement - For both Publisher confirms and Consumer Acknowledgement

Behnam Behzadi bbehzadi.goog at gmail.com
Mon Aug 26 20:50:26 BST 2013

That implies that delivery_tag is unique per channel, right?

So, how would this work if there's not a 1:1 correspondence between
channels and queues and each queue has its own independent consumer thread?
 e.g. let's say we have 2 queues on one channel and each queue is consumed
asynchronously by a consumer thread.  If one of the consumer threads sends
a bulk ack it may inadvertently end up sending ack for the messages that
the other thread is consuming.  Will it not?


On Mon, Aug 26, 2013 at 9:58 AM, Michael Klishin <mklishin at gopivotal.com>wrote:

> Michael Bridgen:
> > Not quite true. basic.ack with multiple = true, *and* delivery-tag =
> > 0, will acknowledge all outstanding messages (on the channel).
> My bad.
> With delivery_tag = N, all unacknowledged deliveries up to N will be
> ack-ed.
> --
> MK
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