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<div>When I set acknowledge to none in spring configuration file, in the rabbit management UI, under Queues --> message rates chart, I see all the messages falling under "<span class="Apple-style-span" style="font-size:12px; line-height:17px; font-family:Verdana,sans-serif">Deliver
(noack)". Doesn't this mean that RabbitMq is not expecting/processing any acknowledgements from the consumer?</span></div>
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<span style="font-weight:bold">From: </span>Anita Yip <<a href="mailto:Anita.Yip@RealPage.com">Anita.Yip@RealPage.com</a>><br>
<span style="font-weight:bold">Date: </span>Thursday, March 27, 2014 9:06 PM<br>
<span style="font-weight:bold">To: </span>Discussions about RabbitMQ <<a href="mailto:rabbitmq-discuss@lists.rabbitmq.com">rabbitmq-discuss@lists.rabbitmq.com</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [rabbitmq-discuss] Spring amqp - auto acknowledge from consumer taking almost a minute<br>
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<div>Thanks for the quick response. That is exactly what I am facing right now. Will try the ack mode to None. Thank you.</div>
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<span style="font-weight:bold">From: </span>Gary Russell <<a href="mailto:grussell@gopivotal.com">grussell@gopivotal.com</a>><br>
<span style="font-weight:bold">Reply-To: </span>Discussions about RabbitMQ <<a href="mailto:rabbitmq-discuss@lists.rabbitmq.com">rabbitmq-discuss@lists.rabbitmq.com</a>><br>
<span style="font-weight:bold">Date: </span>Thursday, March 27, 2014 8:53 PM<br>
<span style="font-weight:bold">To: </span>Discussions about RabbitMQ <<a href="mailto:rabbitmq-discuss@lists.rabbitmq.com">rabbitmq-discuss@lists.rabbitmq.com</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [rabbitmq-discuss] Spring amqp - auto acknowledge from consumer taking almost a minute<br>
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<div dir="ltr">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.
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<div>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.</div>
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<div>Gary</div>
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<div class="gmail_quote">On Thu, Mar 27, 2014 at 11:45 PM, Anita Yip <span dir="ltr">
<<a href="mailto:Anita.Yip@realpage.com" target="_blank">Anita.Yip@realpage.com</a>></span> wrote:<br>
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<div>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?</div>
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<div>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?</div>
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<div>Thanks,</div>
<div>Anita </div>
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