带有 cheroot 服务器的服务器 Flask 应用程序在每次请求后导致 HTTPServer.tick 出错

Question

我正在尝试使用 CherryPy (v18.6.0) 的 cheroot 服务器为 Flask (v1.1.2) wsgi 应用程序提供服务，并且在通过 Postman 或浏览器执行每个请求后，我的控制台中出现以下异常。我是运行 python v3.8.5

Error in HTTPServer.tick
Traceback (most recent call last):
    File "C:\myproject\venv\lib\site-packages\cheroot\server.py", line 1795, in serve
self.tick()
    File "C:\myproject\venv\lib\site-packages\cheroot\server.py", line 2030, in tick
self.connections.expire()
    File "C:\myproject\venv\lib\site-packages\cheroot\connections.py", line 107, in expire
for sock_fd, conn in timed_out_connections:
    File "C:\myproject\venv\lib\site-packages\cheroot\connections.py", line 103, in <genexpr>
(sock_fd, conn)
    File "C:\python\lib\_collections_abc.py", line 743, in __iter__
for key in self._mapping:
RuntimeError: dictionary changed size during iteration

代码如下：

from cheroot.wsgi import Server
from flask import Flask

app = Flask(__name__)

@app.route("/", methods=["GET"])
def index():
    return "Hello"

if __name__ == "__main__":
    server = Server(bind_addr=("0.0.0.0", 3000), wsgi_app=app)
    try:
         server.start()
    finally:
         server.stop()

知道导致该异常的想法以及我们如何解决它吗？

Answer 1

这是 cheroot 最近发现的一个问题，请查看 cheroot GitHub Issue 312。

带有 cheroot 服务器的服务器 Flask 应用程序在每次请求后导致 HTTPServer.tick 出错

Server Flask app with cheroot server results to error in HTTPServer.tick after each request

python

cherrypy

flask

cheroot