[Python] Runtime Error: No Running Event Loop on Streamlit with Docker

• Goal: Trying to build and deploy a streamlit langgraph application
• Problem: Docker and Streamlit do not play well

Phase 1: The app I made: https://github.com/tanvircr7/CRAG/

I first built without docker in mind. I used python virtual environment and everything was working.

Then I started containerising and the problems started

This error kept popping up: https://pastebin.com/FsGanN8N

Phase 2: I deciding to start fresh with docker and then work my way up to the final app

github link of the new project: https://github.com/tanvircr7/corrective-rag

Now I just have a simple file upload application.

When I run it, it starts up on port 8501.

But The same error keeps popping up: https://pastebin.com/FsGanN8N

• System: Windows 11 with wsl2
• Docker Version: 28.0.4 build b8034c0
• Streamlit Version: 1.45.0
• Python Version: 3.11.12

The error code:

Exception in callback AppSession._on_scriptrunner_event.<locals>.<lambda>() at /usr/local/lib/python3.11/site-packages/streamlit/runtime/app_session.py:518

handle: <Handle AppSession._on_scriptrunner_event.<locals>.<lambda>() at /usr/local/lib/python3.11/site-packages/streamlit/runtime/app_session.py:518>

Traceback (most recent call last):
File "/usr/local/lib/python3.11/site-packages/streamlit/web/bootstrap.py", line 347, in run

if asyncio.get_running_loop().is_running():
^^^^^^^^^^^^^^^^^^^^^^^^^^
RuntimeError: no running event loop

During handling of the above exception, another exception occurred:


Traceback (most recent call last):
File "/usr/local/lib/python3.11/asyncio/events.py", line 84, in _run
self._context.run(self._callback, *self._args)
File "/usr/local/lib/python3.11/site-packages/streamlit/runtime/app_session.py", line 518, in <lambda>
lambda: self._handle_scriptrunner_event_on_event_loop(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/streamlit/runtime/app_session.py", line 612, in _handle_scriptrunner_event_on_event_loop
msg = self._create_new_session_message(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/streamlit/runtime/app_session.py", line 742, in _create_new_session_message
_populate_user_info_msg(imsg.user_info)
File "/usr/local/lib/python3.11/site-packages/streamlit/runtime/app_session.py", line 990, in _populate_user_info_msg
inst = Installation.instance()
^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/streamlit/runtime/metrics_util.py", line 228, in instance
cls._instance = Installation()
^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/streamlit/runtime/metrics_util.py", line 236, in __init__
self.installation_id_v4 = _get_machine_id_v4()
^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/streamlit/runtime/metrics_util.py", line 209, in _get_machine_id_v4
with file_util.streamlit_write(filepath) as output:
File "/usr/local/lib/python3.11/contextlib.py", line 137, in __enter__
return next(self.gen)
^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/streamlit/file_util.py", line 109, in streamlit_write
os.makedirs(os.path.dirname(path), exist_ok=True)
File "<frozen os>", line 215, in makedirs
File "<frozen os>", line 225, in makedirs
PermissionError: [Errno 13] Permission denied: '/nonexistent'

Continue reading...