ValueError：set_wakeup_fd仅在Apache2.4.41 + Python 3.8.1 + Django 3.0.2 + MySQL 8.0.19的主线程中起作用。

Question

[当我在Windows 10专业版上使用Apache2.4.41 + Python 3.8.1 + Django 3.0.2 + MySQL 8.0.19运行Django Web应用程序时，它将在/处抛出Value Error。 set_wakeup_fd仅在主线程中有效。

此问题是Python 3.8中的回归结果，已在11月的更高版本的Python中修复。有关更多详细信息-https://bugs.python.org/issue38563。

错误的堆栈跟踪如下-

Environment:

Request Method: GET
Request URL: http://127.0.0.1/

Django Version: 3.0.2
Python Version: 3.8.1
Installed Applications:
['Analysis.apps.AnalysisConfig',
 'django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.humanize']


Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback (most recent call last):
  File "c:\python38\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
    response = get_response(request)
  File "c:\python38\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "c:\python38\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "F:\IndianMarketAnalysis\ISMA\Analysis\views.py", line 8, in home
    date_list = dict(d.date_list())
  File "F:\IndianMarketAnalysis\ISMA\Analysis\models.py", line 7, in date_list
    with connection.cursor() as cursor:
  File "c:\python38\lib\site-packages\django\utils\asyncio.py", line 19, in inner
    event_loop = asyncio.get_event_loop()
  File "c:\python38\lib\asyncio\events.py", line 636, in get_event_loop
    self.set_event_loop(self.new_event_loop())
  File "c:\python38\lib\asyncio\events.py", line 656, in new_event_loop
    return self._loop_factory()
  File "c:\python38\lib\asyncio\windows_events.py", line 310, in __init__
    super().__init__(proactor)
  File "c:\python38\lib\asyncio\proactor_events.py", line 632, in __init__
    signal.set_wakeup_fd(self._csock.fileno())

Exception Type: ValueError at /
Exception Value: set_wakeup_fd only works in main thread

此外，此应用程序在使用-python manage.py runserver的本地开发环境中也可以很好地工作。

请提出下一步建议。

[当我在Windows 10专业版上使用Apache2.4.41 + Python 3.8.1 + Django 3.0.2 + MySQL 8.0.19运行Django Web应用程序时，它将在/处抛出Value Error。 set_wakeup_fd仅适用于main ...

Answer 1

我有完全相同的错误。我打开了issue。