`NameError: name 'TypeError' is not defined` in Apache (mod_wsgi)

Question

Install Version

Apache

apr-1.6.5
apr-util-1.6.1
httpd-2.4.7
mod_wsgi-4.6.8
pcre-8.32

Python

3.8.5

Django

3.1.2

Apache http.conf

Listen 3600
WSGISocketPrefix /var/run/wsgi
<VirtualHost *:3600>
    WSGIDaemonProcess project_name display-name=project_name
    WSGIScriptAlias / /data/project_name/config/wsgi.py  process-group=api application-group=api
    ServerName project_name
    <Directory /data/project_name/config>
        Order allow,deny
        Allow from all
        Require all granted
        <Files wsgi.py>
            Require all granted
        </Files>
    </Directory>
</VirtualHost>

Error log

Exception ignored in: <function Local.__del__ at 0x7fd675a70a60>
Traceback (most recent call last):
  File "/data/venv/api/lib/python3.8/site-packages/asgiref/local.py", line 96, in __del__
NameError: name 'TypeError' is not defined

The above error log is coming out over and over and over again.
I don't know why there is an asgi related error when I don't use asgi.

I observe this, too, since today. `TypeError` is a Python built-in. Possibly, this is a race while the Python interpreter is shutting down? — Torsten Bronger, Nov 05 '20 at 12:12
@TorstenBronger Hi, No error occurred if option WSGIDaemonProcess was not used. Is there any other solution? — 이경언, Nov 09 '20 at 04:11
Unfortunately, it was a “Heisenbug” for me – while troubleshooting it, it went away for other reasons. — Torsten Bronger, Nov 11 '20 at 11:11
Same here after upgrading `python3-distupgrade`. Maybe this package update causes the issue? — zypro, Nov 27 '20 at 15:09

score 0 · Answer 1 · answered May 17 '21 at 20:38

I saw the same similar things in my logs, only during apache shutdown (and thus restart). It is probably background threads still running while the python interpreter is being shut down, as answered by @GrahamDumpleton in a similar-style question (with different errors) several years ago. See NameError: name 'hasattr' is not defined - Python3.6, Django1.11, Ubuntu16-17, Apache2.4, mod_wsgi