[rabbitmq-discuss] Spring amqp - auto acknowledge from consumer taking almost a minute

Gary Russell grussell at gopivotal.com
Fri Mar 28 03:53:28 GMT 2014

Yes; that assumption is wrong; in Spring-AMQP, ack mode AUTO means the
container will automatically ack the message on completion. NONE is the
equivalent of rabbit auto-ack.

Be aware that this can cause OOM issues with spring-AMQP versions prior to
1.3.0, if the consumers can't keep up with the workload because the broker
will keep pumping messages to the client.


On Thu, Mar 27, 2014 at 11:45 PM, Anita Yip <Anita.Yip at realpage.com> wrote:

>   I have a spring amqp based application where the consumer is taking
> very long time to send acknowledgement. In RabbitMq management plugin, I
> see it in Unacknowledged state for almost a whole minute.I am currently
> testing this code by publishing only one message. But my prefetch count and
> transaction size are a 50 and 30 respectively. Could this be any reason for
> the issue?
>  My consumer has heavy processing. But since it is in auto acknowledge
> mode, I believe, the message will be acknowledged immediately after the
> consumer receives it and before it start processing the message. Is this
> assumption wrong?
>  Thanks,
> Anita
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