以下python套接字服务器代码有什么问题？

import socket

def start_server():
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server_socket.bind(('localhost', 8080))
    server_socket.listen(5)

    while True:
        client_socket, address = server_socket.accept()
        data = client_socket.recv(1024)
        client_socket.send(b"Hello, client!")
        client_socket.close()

if __name__ == "__main__":
    start_server()

import socket
import threading

def handle_client(client_socket):
    try:
        data = client_socket.recv(1024)
        # 处理客户端请求的逻辑
        response = b"Hello, client!"
        client_socket.send(response)
    except Exception as e:
        print("Error occurred:", str(e))
    finally:
        client_socket.close()

def start_server():
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server_socket.bind(('localhost', 8080))
    server_socket.listen(5)

    while True:
        client_socket, address = server_socket.accept()
        # 使用多线程处理客户端连接
        client_thread = threading.Thread(target=handle_client, args=(client_socket,))
        client_thread.start()

if __name__ == "__main__":
    start_server()