Re: ValueError: set_wakeup_fd only works in main thread on Apache2.4.41 + Python 3.8.1 + Django 3.0.2 + MySQL 8.0.19

Thx jlgimeno71

I am able to reproduce this issue using Python 3.8.2rc2 released on 17th Feb. As next steps moving to Python 3.7.

Regards,

Siddharth Agarwal

On Sunday, February 23, 2020 at 11:05:42 AM UTC+5:30, jlgimeno71 wrote:

On Sat, Feb 22, 2020 at 9:02 PM Siddharth Agarwal <sk.ag...@gmail.com> wrote:

Hello 

When I run my Django Web application with Apache2.4.41 + Python 3.8.1 + Django 3.0.2 + MySQL 8.0.19 on Windows 10 Professional 64 bit version it throws Value Error at /. set_wakeup_fd only works in main thread.

This issue was a result of regression in Python 3.8 and was fixed in November in later builds of Python. For more details - https://bugs.python.org/issue38563.

Stacktrace of the error is as follows - 

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

Further, this application works very well on local Development Environment using - python manage.py runserver.

Please suggest the next steps to move forward.

 

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/5dceb145-7d89-4bd0-a3cf-24dd5155891a%40googlegroups.com.

 This is fixed and will be released with 3.8.2, per what I've read.  If running 3.8.2 release candidate 2 isn't an option, is downgrading to Python 3.7 an option?

-Jorge

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/c2fbea7b-46f0-472b-9d40-628e000e34f8%40googlegroups.com.