Why does gevent affect the asyncio usage of child thread？

[ssppest]

• gevent version: 20.10.2
• Python version: cPython 3.9
• Operating System: macOS 14.3.1(M3)

Description:

I use gevent patch for my program, but in the program, I need to execute asyncio related code in sub threads
When multiple sub threads execute the same coroutine, it triggers "RuntimeError: This event loop is already running"
They are different threads, I generated its own event loop for each sub thread，I cannot understand this issue
When I commented out the monkey patch, the program executed as I expected

ERROR:root:This event loop is already running
Traceback (most recent call last):
  File "/Users/computer1/pytest/test.py", line 30, in func1
    loop.run_until_complete(asyncf1())
  File "/opt/homebrew/Cellar/python@3.9/3.9.18_2/Frameworks/Python.framework/Versions/3.9/lib/python3.9/asyncio/base_events.py", line 623, in run_until_complete
    self._check_running()
  File "/opt/homebrew/Cellar/python@3.9/3.9.18_2/Frameworks/Python.framework/Versions/3.9/lib/python3.9/asyncio/base_events.py", line 583, in _check_running
    raise RuntimeError('This event loop is already running')
RuntimeError: This event loop is already running
/Users/computer1/pytest/test.py:32: RuntimeWarning: coroutine 'asyncf1' was never awaited
  logging.error(e, exc_info=True)
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
ERROR:root:This event loop is already running
Traceback (most recent call last):
  File "/Users/computer1/pytest/test.py", line 30, in func1
    loop.run_until_complete(asyncf1())
  File "/opt/homebrew/Cellar/python@3.9/3.9.18_2/Frameworks/Python.framework/Versions/3.9/lib/python3.9/asyncio/base_events.py", line 623, in run_until_complete
    self._check_running()
  File "/opt/homebrew/Cellar/python@3.9/3.9.18_2/Frameworks/Python.framework/Versions/3.9/lib/python3.9/asyncio/base_events.py", line 583, in _check_running
    raise RuntimeError('This event loop is already running')
RuntimeError: This event loop is already running

What I've run:

import logging

import gevent.monkey
gevent.monkey.patch_all()
import concurrent.futures

import threading
import time
import asyncio

pool = concurrent.futures.ThreadPoolExecutor()

async def asyncf1():
    print("aa")
def func1():
    # print(f"thread:{threading.get_ident()},gevent:{id(gevent.getcurrent())}")
    try:
        try:
            loop = asyncio.get_event_loop()
        except RuntimeError:
            loop = asyncio.new_event_loop()
            # asyncio.set_event_loop(loop)
        loop.run_until_complete(asyncf1())
    except Exception as e:
        logging.error(e, exc_info=True)
    print(threading.current_thread())
    time.sleep(3)


for i in range(3):
    pool.submit(func1)

time.sleep(10)