In Main Thread, I Create a WebSocket Connection Is OK, But When I Create In Sub Thread and Use domain URL, It Will Throw Exception(Use ipv4 URL Is OK).

Why Why Why??? It bothered me for a long time

When I Use Main Thread to create WebSocket Client Is Ok. like this:

import asyncio
import aiohttp


async def ws_client():
    # WebSocket服务器的URL
    url = 'ws://www.test.xyz' # faker domain
    
    async with aiohttp.ClientSession() as session:
        async with session.ws_connect(url) as ws:
            print(f'success connect to {url}')
            await ws.send_str('Hello, Server!')
            async for msg in ws:
                if msg.type == aiohttp.WSMsgType.TEXT:
                    print(f'message from server: {msg.data}')
                elif msg.type == aiohttp.WSMsgType.ERROR:
                    print('occor a error')
                    break
            
            print('close WebSocket')

if __name__ == "__main__":
    asyncio.run(ws_client())

Like that Is Run Successfully

but When It run It in Sub Thread It will occor a error.

import asyncio
import aiohttp
import threading
import socket

class MyThread(threading.Thread):

    def run(self) -> None:
        loop = asyncio.new_event_loop()
        asyncio.set_event_loop(loop)
        asyncio.run(ws_client())

async def ws_client():
    """ Like Next Demo """
    pass

if __name__ == "__main__":
    t = MyThread()
    t.start()

It throw Exception like this:

RuntimeError       (note: full exception trace is shown but execution is paused at: ws_client)
can't register atexit after shutdown
  File "H:sy_toolpy_websocket_clientsrctesttest_2.py", line 20, in ws_client (Current frame)
    async with session.ws_connect(url) as ws:
  File "H:sy_toolpy_websocket_clientsrctesttest_2.py", line 11, in run
    asyncio.run(ws_client())
RuntimeError: can't register atexit after shutdown

But when i use ipv4 to replace domian url , It Run Successfuly, emmm…..

In Main Thread, I Create a WebSocket Connection Is OK, But When I Create In Sub Thread and Use domain URL, It Will Throw Exception(Use ipv4 URL Is OK).

Why Why Why??? It bothered me for a long time

I Use Python Version Is 3.10.10