【问题标题】：MonkeyPatchWarning: Monkey-patching ssl after ssl has already been imported may lead to errorsMonkeyPatchWarning：在已导入 ssl 之后对 ssl 进行猴子修补可能会导致错误
【发布时间】：2022-12-16 05:17:24
【问题描述】：

背景

我有一个严重依赖 iobound 的 Django 应用程序，所以根据我读过的文档，我试图让 gunincorn 与 gevent 一起工作以获得最佳性能。

错误

dev1            | Patching Started
dev1            | /app/Dev/wsgi.py:19: MonkeyPatchWarning: Monkey-patching ssl after ssl has already been imported may lead to errors, including RecursionError on Python 3.6. It may also silently lead to incorrect behaviour on Python 3.7. Please monkey-patch earlier. See https://github.com/gevent/gevent/issues/1016. Modules that had direct imports (NOT patched): ['urllib3.util (/usr/local/lib/python3.9/site-packages/urllib3/util/__init__.py)', 'urllib3.util.ssl_ (/usr/local/lib/python3.9/site-packages/urllib3/util/ssl_.py)']. 
dev1            |   monkey.patch_all(thread=False, select=False)
dev1            | Patching Done
dev1            | /usr/local/lib/python3.9/site-packages/paramiko/transport.py:236: CryptographyDeprecationWarning: Blowfish has been deprecated
dev1            |   "class": algorithms.Blowfish,
dev1            | /usr/local/lib/python3.9/site-packages/gunicorn/workers/ggevent.py:38: MonkeyPatchWarning: Patching more than once will result in the union of all True parameters being patched
dev1            |   monkey.patch_all()
dev1            | /usr/local/lib/python3.9/site-packages/gunicorn/workers/ggevent.py:38: MonkeyPatchWarning: Patching more than once will result in the union of all True parameters being patched
dev1            |   monkey.patch_all()
dev1            | /usr/local/lib/python3.9/site-packages/gunicorn/workers/ggevent.py:38: MonkeyPatchWarning: Patching more than once will result in the union of all True parameters being patched
dev1            |   monkey.patch_all()
...

设置

wsgi.py

# Needs to happen first
print("Patching Started")
from gevent import monkey
monkey.patch_all(thread=False, select=False)
# monkey.patch_all()
from psycogreen.gevent import patch_psycopg
patch_psycopg()
print("Patching Done")

import os

from django.core.wsgi import get_wsgi_application

os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'Dev.settings')

application = get_wsgi_application()

Docker-Compose 命令

    command:
      - |
        gunicorn Dev.wsgi:application  
        --bind 0.0.0.0:8000 
        --workers 10 
        --timeout 30 
        --preload 
        --access-logfile /dev/stdout 
        --worker-class gevent"

问题

所以在我看来，我应该在 gunicorn 一开始拾起它时将我的 monkey.patch() 放在正确的位置，但不知何故 urllib3.util 首先加载。我把猴子补丁放在正确的地方了吗？

【问题讨论】：

标签： python django gunicorn gevent

【解决方案1】：

我假设你有一个gunicorn.conf.py文件。您是否尝试添加

monkey.patch_all(thread=False, select=False)

在这个文件的顶部？

在经历了您刚才描述的相同问题之后，它似乎对我有用。让我知道是否有帮助。

【讨论】：