python atexit behaviour with openssl lib and lazy-apps

[nacho692]

I have a uWSGI server with required lazy-apps = true. When the process exits I need to do some cleanup which involves generating http requests but it errors out when creating SSL context.

• uWSGI 2.0.28 (64bit)
• Python version: 3.11.11

Disabling lazy-apps seems to fix the problem.

I was able to generate a min version that reproduces the issue:

[uwsgi]
strict = true
vacuum = true
master = true
die-on-term = true
need-app = true
enable-threads = true
single-interpreter = true
lazy-apps = true
#skip-atexit-teardown = true
wsgi-file=app_api.py

auto-procname = true
procname-prefix-spaced = app
workers = 1

socket = /tmp/app_api.sock
chmod-socket = 664

import falcon
import atexit
import ssl

def get_app():

    def exith():
        print('Exiting...')
        ctx = ssl.create_default_context()
        print(ctx)

    atexit.register(exith)
    ctx = ssl.create_default_context()
    print(ctx)
    app = falcon.App()
    return app

application = get_app()

spawned uWSGI master process (pid: 13998)
spawned uWSGI worker 1 (pid: 13999, cores: 1)
<ssl.SSLContext object at 0x7374fb3eb260>
WSGI app 0 (mountpoint='') ready in 1 seconds on interpreter 0x7374fcf87478 pid: 13999 (default app)
SIGINT/SIGTERM received...killing workers...
Exiting...
Exception ignored in atexit callback: <function get_app.<locals>.exith at 0x7374fc120400>
Traceback (most recent call last):
  File "app_api.py", line 9, in exith
    ctx = ssl.create_default_context()
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/ssl.py", line 761, in create_default_context
    context = SSLContext(PROTOCOL_TLS_CLIENT)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/ssl.py", line 500, in __new__
    self = _SSLContext.__new__(cls, protocol)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ssl.SSLError: unknown error (_ssl.c:3098)
worker 1 buried after 1 seconds
goodbye to uWSGI.

Perhaps this is related to #1969?