django celery 错误：不可恢复的错误：AttributeError("'EntryPoint' object has no attribute 'module_name'")

Question

我很困惑，因为我是 celery 的新手，所以我不知道这个奇怪的错误，这个错误只发生在设置阶段，每件事都按照 celery 文档中的描述简单配置https://docs.celeryq。 dev/en/stable/django/first-steps-with-django.html 回溯是：

(env) muhammad@huzaifa:~/Desktop/practice/app$ celery -A app worker -l INFO
[2022-04-04 16:21:40,988: WARNING/MainProcess] No hostname was supplied. Reverting to default 'localhost'
[2022-04-04 16:21:40,993: CRITICAL/MainProcess] Unrecoverable error: AttributeError("'EntryPoint' object has no attribute 'module_name'")
Traceback (most recent call last):
  File "/home/muhammad/Desktop/practice/env/lib/python3.8/site-packages/celery/app/base.py", line 1250, in backend
    return self._local.backend
AttributeError: '_thread._local' object has no attribute 'backend'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/muhammad/Desktop/practice/env/lib/python3.8/site-packages/celery/worker/worker.py", line 203, in start
    self.blueprint.start(self)
  File "/home/muhammad/Desktop/practice/env/lib/python3.8/site-packages/celery/bootsteps.py", line 112, in start
    self.on_start()
  File "/home/muhammad/Desktop/practice/env/lib/python3.8/site-packages/celery/apps/worker.py", line 136, in on_start
    self.emit_banner()
  File "/home/muhammad/Desktop/practice/env/lib/python3.8/site-packages/celery/apps/worker.py", line 170, in emit_banner
    ' \n', self.startup_info(artlines=not use_image))),
  File "/home/muhammad/Desktop/practice/env/lib/python3.8/site-packages/celery/apps/worker.py", line 232, in startup_info
    results=self.app.backend.as_uri(),
  File "/home/muhammad/Desktop/practice/env/lib/python3.8/site-packages/celery/app/base.py", line 1252, in backend
    self._local.backend = new_backend = self._get_backend()
  File "/home/muhammad/Desktop/practice/env/lib/python3.8/site-packages/celery/app/base.py", line 955, in _get_backend
    backend, url = backends.by_url(
  File "/home/muhammad/Desktop/practice/env/lib/python3.8/site-packages/celery/app/backends.py", line 69, in by_url
    return by_name(backend, loader), url
  File "/home/muhammad/Desktop/practice/env/lib/python3.8/site-packages/celery/app/backends.py", line 47, in by_name
    aliases.update(load_extension_class_names(extension_namespace))
  File "/home/muhammad/Desktop/practice/env/lib/python3.8/site-packages/celery/utils/imports.py", line 146, in load_extension_class_names
    yield ep.name, ':'.join([ep.module_name, ep.attrs[0]])
AttributeError: 'EntryPoint' object has no attribute 'module_name'

初始化文件是：

from __future__ import absolute_import, unicode_literals

from .celery import app as celery_app

__all__ = ('celery_app',)

芹菜.py:

import os

from celery import Celery

# Set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'app.settings')

app = Celery('app', broker='localhost')

# Using a string here means the worker doesn't have to serialize
# the configuration object to child processes.
# - namespace='CELERY' means all celery-related configuration keys
#   should have a `CELERY_` prefix.
app.config_from_object('django.conf:settings', namespace='CELERY')

# Load task modules from all registered Django apps.
app.autodiscover_tasks()


@app.task(bind=True)
def debug_task(self):
    print(f'Request: {self.request!r}')

供您参考，rabbitmq-server 在本地主机上运行，这就是我将 BROKER_URL 设置为“localhost”的原因

 rabbitmq-server.service - RabbitMQ Messaging Server
     Loaded: loaded (/lib/systemd/system/rabbitmq-server.service; enabled; vendor preset: enabled)
     Active: active (running) since Sun 2022-04-03 16:14:04 PKT; 24h ago
   Main PID: 1005 (beam.smp)
     Status: "Initialized"
      Tasks: 91 (limit: 9090)

我知道为什么会这样，我已经四处寻找了几个小时，但找不到解决方案，甚至连谷歌或任何地方的错误都找不到。 任何帮助将不胜感激 谢谢！

Answer 1

你遇到了芹菜的新错误，报告在这里：https://github.com/celery/celery/issues/7409

您可以尝试的解决方法是将

celery

的依赖项版本固定到旧版本（即在 celery bug 发布之前）。比如我的

requirements.txt

包括：

celery==5.2.3

或者在命令行上你可以运行

pip install celery==5.2.3

（供参考，我在这里看到错误报告的版本是 celery 5.2.5 & click 8.1.2）

希望这在上游得到修复，我们可以删除我们的版本别针。

Answer 2

遇到同样的错误将celery版本降级到5.2.0也成功了

Answer 3

我将 celery 降级到 5.2.3，一切正常。

谢谢@Jeff-G

Answer 4

我今天遇到了同样的问题。所以，我只是将芹菜版本降级到 5.2.3

pip install celery==5.2.3

成功了