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

[Anita Yip]

Thanks for the quick response. That is exactly what I am facing right now. Will try the ack mode to None. Thank you.

From: Gary Russell <grussell at gopivotal.com<mailto:grussell at gopivotal.com>>
Reply-To: Discussions about RabbitMQ <rabbitmq-discuss at lists.rabbitmq.com<mailto:rabbitmq-discuss at lists.rabbitmq.com>>
Date: Thursday, March 27, 2014 8:53 PM
To: Discussions about RabbitMQ <rabbitmq-discuss at lists.rabbitmq.com<mailto:rabbitmq-discuss at lists.rabbitmq.com>>
Subject: Re: [rabbitmq-discuss] Spring amqp - auto acknowledge from consumer taking almost a minute

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.

Gary


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