Error “unknown delivery tag” occurs when i try ack messages to RabbitMQ using pika (python)

Question

I want process messages in few threads but i\'m getting error during execute this code:

from __future__ import with_statement
import pika
import sys
from pika.ad         


        

Answer 1

The problem probably is that you're setting no_ack=True like this:

consumer_tag = channel.basic_consume(
    message_delivery_event,
    no_ack=True,
    queue=queue,
)

And then acknowledging the messages:

channel.basic_ack(delivery_tag=args.delivery_tag)

You have to chose if you want to acknowledge or not and set the correct consume parameter.