How to implement guide with handling concurrent tcp connections in python with socketserver
I've tried everything I can think of but I'm working on a TCP server using Python's `socketserver` module (version 3.9.7), and I'm running into issues with handling concurrent connections... My server seems to hang when multiple clients try to connect simultaneously. Here’s a simple version of what I have: ```python import socketserver class MyTCPHandler(socketserver.BaseRequestHandler): def handle(self): self.data = self.request.recv(1024).strip() print(f"Received: {self.data}") self.request.sendall(self.data.upper()) if __name__ == '__main__': HOST, PORT = 'localhost', 9999 with socketserver.ThreadingTCPServer((HOST, PORT), MyTCPHandler) as server: print(f'Serving on {HOST}:{PORT}') server.serve_forever() ``` When I run this server and try to connect from multiple clients (using a simple script that sends messages in a loop), I notice that while the first client connects successfully, subsequent clients either hang or get a timeout behavior: ``` ConnectionRefusedError: [Errno 111] Connection refused ``` I've tried increasing the backlog in `ThreadingTCPServer` by modifying the constructor, but it didn’t seem to help. My client script looks like this: ```python import socket HOST, PORT = 'localhost', 9999 for i in range(10): with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock: sock.connect((HOST, PORT)) sock.sendall(b'Hello World') response = sock.recv(1024) print(f'Response: {response}') ``` I’ve also checked the system's maximum number of open files and adjusted it, but the scenario continues. Is there something I'm missing in the way I’m handling connections? Any advice on best practices for setting up a concurrent TCP server would be greatly appreciated! This is for a desktop app running on Ubuntu 22.04. Am I missing something obvious? I'd really appreciate any guidance on this.