芹菜提出不当配置的例外

Question

我在芹菜文档中的情况下测试，但提出了不当配置的异常。http://docs.celeryproject.org/en/master/userguide/calling.html#id3

Traceback (most recent call last):   
File "test.py", line 8, in <module> print(r.get(on_message=on_raw_message, propagate=False))   
File "/usr/local/python2.7/lib/python2.7/site-packages/celery/result.py", line 189, in get on_message=on_message,   
File "/usr/local/python2.7/lib/python2.7/site-packages/celery/backends/base.py", line 460, in wait_for_pending 'Backend does not support on_message callback')  
celery.exceptions.ImproperlyConfigured: Backend does not support on_message callback

测试代码是：

from celery_test.agent import hello
from celery_test.celery import app
def on_raw_message(body):
    print(body)
r = hello.apply_async(args=[122,34], queue='machine1', routing_key='machine1')
print(r.get(on_message=on_raw_message, propagate=False))

芹菜的输出-A芹菜级报告

[root@zm03 script]# celery -A celery_test report
software -> celery:4.0.0 (latentcall) kombu:4.0.0 py:2.7.9
            billiard:3.5.0.2 py-amqp:2.1.1
platform -> system:Linux arch:64bit, ELF imp:CPython
loader   -> celery.loaders.app.AppLoader
settings -> transport:amqp results:amqp://guest@192.168.1.201//
CELERY_DEFAULT_EXCHANGE_TYPE: 'direct'
CELERY_RESULT_SERIALIZER: 'json'
timedelta: <type 'datetime.timedelta'>
Exchange: <class 'kombu.entity.Exchange'>
CELERY_INCLUDE: ['celery_test.agent']
absolute_import: _Feature((2, 5, 0, 'alpha', 1), (3, 0, 0, 'alpha', 0), 16384)
Queue: <class 'kombu.entity.Queue'>
CELERY_TASK_RESULT_EXPIRES: 3600
CELERT_QUEUES:
    (<unbound Queue machine1 -> 'agent' -> machine1>,
 <unbound Queue machine2 -> 'agent' -> machine2>)
CELERY_ACCEPT_CONTENT: ['json']
CELERY_TASK_SERIALIZER: 'json'
BROKER_URL: u'amqp://guest:********@192.168.1.201:5672//'
CELERY_RESULT_BACKEND: u'amqp://guest@192.168.1.201//'
CELERY_DEFAULT_EXCHANGE: 'agent'

Answer 1

兔子结果后端在芹菜5.x中删除，因为它在v4.x中被弃用。

Answer 2

显然芹菜中似乎有一些错误。由于on_message应该与rabbitmq后端一起使用。

解决方法：转到redis进行结果后端。

在下面的拉请求[确认]，

中引入

https://github.com/celery/celery/pull/3477/files

我为您面临的错误创建了问题，

https://github.com/celery/celery/issues/3625