[英]RabbitMQ python worker script using 100% CPU
I worte this python script which acts as an RPC server by modifying the default RPC example in RabbitMQ tutorial found here . 我通过修改这里找到的RabbitMQ教程中的默认RPC示例来编写这个充当RPC服务器的python脚本。 It runs fine in my laptop.
它在我的笔记本电脑上运行正常 But when i run it in an amazon ec2 High CPU Medium Instance with these specs :
但是当我在亚马逊ec2高CPU中等实例中使用这些规范运行它时:
1.7 GiB of memory
1.7 GiB的内存
5 EC2 Compute Units (2 virtual cores with 2.5 EC2 Compute Units each)
5个EC2计算单元(2个虚拟核,每个具有2.5个EC2计算单元)
350 GB of instance storage
350 GB的实例存储
It takes up 100% CPU. 它占用了100%的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.
虽然我的笔记本电脑具有几乎相同的配置运行,CPU使用率不到4%。我在笔记本电脑和亚马逊的Ubuntu-12.04中运行它。
Here is my code 这是我的代码
#!/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 ? 我怎样才能解决这个问题 ?
Finally found the problem. 终于找到了问题。 It was a bug in Pika, i got this information from rabbitmq's mailing list.
这是Pika的一个错误,我从rabbitmq的邮件列表中获取了这些信息。 I had installed pika through pypi.
我通过pypi安装了pika。
pip install pika
. pip install pika
。
To fix this i uninstalled pika 解决这个我卸载的鼠兔
pip uninstall pika
and reinstalled it from git 并从git重新安装它
pip install git+https://github.com/pika/pika.git
. pip install git+https://github.com/pika/pika.git
。
And that solved it. 这解决了它。
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