[rabbitmq-discuss] AMQP basic_recover

Mon Feb 14 13:22:02 GMT 2011

Hello,

I have this is a piece of code to process a message:

public function processMessage($message)
{
    try{
         execute($message);
         $this->_queue->remove($message);
                  $this->_queue->commit();
    } catch (Exception $e) {
            $this->_queue->getChannel()->basic_reject($message->getId(),
true);
            //$this->_queue->getChannel()->basic_recover(true);
            $this->_queue->rollback();
    }
}

All I want to do is just to redeliver a message after some exception occurs.
But if I use basic_recover(true)I get an error - "PRECONDITION_FAILED -
unknown delivery tag 2".

Then I have noticed for example when I ask to redeliver a message with
delivery tag [1] (because I have got an exception) I get a second message
with delivery tag [2] and once I try to commit it I get "PRECONDITION_FAILED
- unknown delivery tag 2". Its like if X message fails and I ask to
redeliver it, next X+1 message that arrives, will fail witn an error
"PRECONDITION_FAILED
- unknown delivery tag X+1" when i will try to commit it.

Then I have tried to use basic_reject($message->getId(), true); and it
works, all messages are redelivered.

Perhaps I am doing something wrong here regarding basic_recover?

I am using RabbitMQ 2.3.1

Thank you for your answers!

Tomas
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