how to read unacknowledged messages in the queue, and also in sequence how its inserted into unack

[sxp5...@ucmo.edu]

hi all,

i m working on the rabbit mq queue. Have a requirement where i need to send the messages into the unack state. When i read the queue next time, not able to get the messages from the unack state. Is there any way to retrieve the messages from the unack state and after that read from the ready state?

[Simon MacMullen]

Unacked messages are any which have been delivered to a consumer but not
acked. You can't read them in the unacked state, they are "owned" by the
consumer that has them.

Messages can return to the ready state:

* If the consumer sends basic.reject / basic.nack with requeue=true

* If the consumer sends basic.recover

* If the consumer connection goes down

If they are held by a "rogue" consumer then only the third will be
possible - you can kill the consumer's connection with rabbitmqctl or
management.

Cheers, Simon

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[Michael Klishin]

Unacknowleged messages can be re-queued (see basic.reject and basic.nack protocol operations).

There is no way to consume unacknowledged messages without re-queueing them first. 
--
MK

Staff Software Engineer, Pivotal/RabbitMQ