[rabbitmq-discuss] Python worker consuming 100% cpu

Thu Feb 14 13:50:00 GMT 2013

It's an issue that is fixed in pika's master branch and will be pushed to
pypi soon. You can test by installing pika with pip from git.

On Thursday, February 14, 2013, Manuchandraprasad R wrote:

> I worte this python script which acts as an RPC server by modifying the
> default RPC example in RabbitMQ tutorial found here<http://www.rabbitmq.com/tutorials/tutorial-six-python.html>.
> It runs fine in my laptop. But when i run it in an amazon ec2 High CPU
> Medium Instance with these specs :
>
> 1.7 GiB of memory
>
> 5 EC2 Compute Units (2 virtual cores with 2.5 EC2 Compute Units each)
>
> 350 GB of instance storage
>
> It takes up 100% CPU. Although my laptop with almost the same config runs
> this with less than 4% CPU use.I run this in Ubuntu-12.04 in both my laptop
> and amazon.
>
> Here is my code
>
>     #!/usr/bin/env python
>     import pika
>     import commands
>     import socket
>     import base64
>
>     connection = pika.BlockingConnection(pika.ConnectionParameters(
>              host='localhost'))
>     channel = connection.channel()
>     channel.queue_declare(queue='rpc_queue')
>     def on_request(ch, method, props, body):
>         #print body
>         body = base64.b64decode(body)
>         print body
>         run = commands.getoutput(body)
>         response = socket.gethostname()
>         print response
>         ch.basic_publish(exchange='',
>                         routing_key=props.reply_to,
>                         properties=pika.BasicProperties(correlation_id = \
>                                                       props.correlation_id),
>                         body=str(response))
>         ch.basic_ack(delivery_tag = method.delivery_tag)
>     channel.basic_qos(prefetch_count=1)
>     channel.basic_consume(on_request, queue='rpc_queue')
>     print " [x] Awaiting RPC requests"
>     channel.start_consuming()
>
>  How can i fix this ?
>
> Manu

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