Celery AttributeError:异步错误

Question

我在Mac (OS/X 10.13.4)上本地运行了RabbitMQ和Celery，当我运行add.delay(x，y)时，以下代码在本地运行：

#!/usr/bin/env python
from celery import Celery
from celery.utils.log import get_task_logger

logger = get_task_logger(__name__)

app = Celery('tasks', \
        broker='pyamqp://appuser:xx@c2/appvhost', \
        backend='db+mysql://appuser:xx@c2/pigpen')

@app.task(bind=True)
def dump_context(self, x, y):
    print('Executing task id {0.id}, args: {0.args!r} kwargs {0.kwargs!r}'.format(self.request))

@app.task
def add(x, y):
    logger.info('Adding {0} + {1}'.format(x, y))
    return x + y

但是，当我尝试在运行Kali 2018.2的ODROID-C2上运行Celery worker时(w.当前更新，我在运行celery -A tasks worker --loglevel=info时得到以下错误

Traceback (most recent call last):
  File "/usr/local/bin/celery", line 11, in <module>
    sys.exit(main())
  File "/usr/local/lib/python2.7/dist-packages/celery/__main__.py", line 14, in main
    _main()
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/celery.py", line 326, in main
    cmd.execute_from_commandline(argv)
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/celery.py", line 488, in execute_from_commandline
    super(CeleryCommand, self).execute_from_commandline(argv)))
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/base.py", line 281, in execute_from_commandline
    return self.handle_argv(self.prog_name, argv[1:])
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/celery.py", line 480, in handle_argv
    return self.execute(command, argv)
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/celery.py", line 412, in execute
    ).run_from_argv(self.prog_name, argv[1:], command=argv[0])
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/worker.py", line 221, in run_from_argv
    return self(*args, **options)
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/base.py", line 244, in __call__
    ret = self.run(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/worker.py", line 255, in run
    **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/celery/worker/worker.py", line 99, in __init__
    self.setup_instance(**self.prepare_args(**kwargs))
  File "/usr/local/lib/python2.7/dist-packages/celery/worker/worker.py", line 122, in setup_instance
    self.should_use_eventloop() if use_eventloop is None
  File "/usr/local/lib/python2.7/dist-packages/celery/worker/worker.py", line 241, in should_use_eventloop
    self._conninfo.transport.implements.async and
  File "/home/autossh/.local/lib/python2.7/site-packages/kombu/transport/base.py", line 125, in __getattr__
    raise AttributeError(key)
AttributeError: async

在Kali ODROID中，我可以使用Python Pika脚本连接到名为c2的主机上的RabbitMQ实例，并且可以从该设备使用mysql连接到c2机器。我发现过类似的错误，这些解决方案对我来说都不起作用。

通过pip安装在ODROID-C2上的Celery版本是：

celery --version
4.1.0 (latentcall)

Answer 1

我们只是通过更新到celery==4.1.1进行排序

4.1.X的最新版本似乎解决了kombu上的模块名称更改问题

Answer 2

确保您使用的是Kombu 4.1.0。最新版本的Kombu将async重命名为async。

Answer 3

芹菜没有将其对kombu和台球的要求限制在特定的版本上。它们需要满足以下条件：

billiard>=3.5.0.2,<3.6.0
kombu>=4.0.2,<5.0

https://github.com/celery/celery/blob/v4.1.0/requirements/default.txt

kombu 4.2.0的发布有一个突破性的变化，以前版本的celery会自动安装它。

由于Celery不会锁定特定版本，如果您要继续使用celery 4.1.0，则应锁定以下内容：

kombu==4.1.0
billiard==3.5.0.2