RuntimeError: Event loop is closed #5021
Description
Steps to Reproduce
import logging
from telegram.ext import (
Application,
)
logging.basicConfig(
level=logging.INFO,
format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
)
logger = logging.getLogger(__file__)
logger.setLevel(logging.INFO)
logging.getLogger("httpx").setLevel(logging.WARNING)
def error_handler(update, context) -> None:
logger.exception(
msg="Unhanlded Exception while handling an update:", exc_info=context.error
)
async def post_init(application: Application) -> None:
await application.bot.send_message(OWNER_USER_ID, "deployed")
def main():
application = (
Application.builder()
.token(TOKEN)
.post_init(post_init)
.read_timeout(20)
.write_timeout(20)
.connect_timeout(20)
.pool_timeout(10)
.get_updates_read_timeout(20)
.build()
)
application.run_polling(
allowed_updates=["message", "callback_query"], bootstrap_retries=10
)
if __name__ == "__main__":
main()Expected behaviour
The code should run normally.
Actual behaviour
sometimes in unstable networks, i got RuntimeError: Event loop is closed error when running the code.
Operating System
windows 11 24h2 with the code running in docker with python:3.13-slim image
Version of Python, python-telegram-bot & dependencies
python-telegram-bot 22.5
Bot API 9.2
Python 3.13.9 (main, Oct 21 2025, 02:09:29) [GCC 14.2.0]Relevant log output
/usr/local/lib/python3.13/site-packages/telegram/ext/_application.py:631: RuntimeWarning: coroutine 'Application._update_fetcher' was never awaited
self._update_fetcher(), name=f"Application:{self.bot.id}:update_fetcher"
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
Traceback (most recent call last):
File "<frozen runpy>", line 198, in _run_module_as_main
File "<frozen runpy>", line 88, in _run_code
File "/app/project/__main__.py", line 4, in <module>
main()
~~~~^^
File "/app/project/bot/bot_getupdates.py", line 79, in main
application.run_polling(allowed_updates=["message", "callback_query"], bootstrap_retries=10)
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.13/site-packages/telegram/ext/_application.py", line 839, in run_polling
return self.__run(
~~~~~~~~~~^
updater_coroutine=self.updater.start_polling(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...<9 lines>...
close_loop=close_loop,
^^^^^^^^^^^^^^^^^^^^^^
)
^
File "/usr/local/lib/python3.13/site-packages/telegram/ext/_application.py", line 1061, in __run
loop.run_until_complete(self.start())
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^
File "/usr/local/lib/python3.13/asyncio/base_events.py", line 725, in run_until_complete
return future.result()
~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.13/site-packages/telegram/ext/_application.py", line 631, in start
self._update_fetcher(), name=f"Application:{self.bot.id}:update_fetcher"
^^^^^^^^^^^
File "/usr/local/lib/python3.13/site-packages/telegram/_bot.py", line 553, in id
return self.bot.id
^^^^^^^^
File "/usr/local/lib/python3.13/site-packages/telegram/_bot.py", line 542, in bot
raise RuntimeError(
...<2 lines>...
)
RuntimeError: ExtBot is not properly initialized. Call `ExtBot.initialize` before accessing this property.
Exception ignored in: <function Connection.__del__ at 0x7f954e1c2fc0>
Traceback (most recent call last):
File "/usr/local/lib/python3.13/site-packages/aiomysql/connection.py", line 1131, in __del__
File "/usr/local/lib/python3.13/site-packages/aiomysql/connection.py", line 339, in close
File "/usr/local/lib/python3.13/asyncio/selector_events.py", line 1205, in close
File "/usr/local/lib/python3.13/asyncio/selector_events.py", line 865, in close
File "/usr/local/lib/python3.13/asyncio/base_events.py", line 833, in call_soon
File "/usr/local/lib/python3.13/asyncio/base_events.py", line 556, in _check_closed
RuntimeError: Event loop is closeAdditional Context
No response