Streamlit 1.21.0 Gobal AssertionErrors issues? (impact on apps performance)

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Summary

Hi there, I have noticed that The Dungeon recently slowed quite a bit. As I did not change code recently I had a feeling that something must have changed in streamlit itself. In the app managment I found strange Assertion Errors. The problem vanished after playing around with requirements regarding streamlit version.

The same thing happend to the StreamlitLand Adventure - the problem vanished after rebooting the app.

At the moment I can see that assertion errors are visible on my other apps like https://chisquared.streamlit.app/ (I do not reboot it for sake of investigation).

Please let me know if you are noticing assertion errors as well on your apps!

The Dungeon Github

AssertionError: session with id '50a2b59a-1914-474d-bef5-e464d927bbf3' is already connected!

2023-04-12 21:32:21.019 Uncaught exception GET /_stcore/stream (127.0.0.1)

HTTPServerRequest(protocol='http', host='dungeon.streamlit.app', method='GET', uri='/_stcore/stream', version='HTTP/1.1', remote_ip='127.0.0.1')

Traceback (most recent call last):

  File "/home/appuser/venv/lib/python3.9/site-packages/tornado/websocket.py", line 942, in _accept_connection

    open_result = handler.open(*handler.open_args, **handler.open_kwargs)

  File "/home/appuser/venv/lib/python3.9/site-packages/streamlit/web/server/browser_websocket_handler.py", line 123, in open

    self._session_id = self._runtime.connect_session(

  File "/home/appuser/venv/lib/python3.9/site-packages/streamlit/runtime/runtime.py", line 361, in connect_session

    session_id = self._session_mgr.connect_session(

  File "/home/appuser/venv/lib/python3.9/site-packages/streamlit/runtime/websocket_session_manager.py", line 65, in connect_session

    assert (
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@TomJohn Did you get to the bottom of this?

I don’t think it’s Streamlit 1.21.0 related. I have been seeing similar things with GPT Lab (and I have not upgraded to 1.21.0 yet).

1 Like
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Hi @dclin unfortunatelly no. As far as i can see assertion issues still persist in https://chisquared.streamlit.app/ . Reboot would probably help, however I am keeping it like that for Streamlit’s team. Please try to reboot your app and let me know if issue persits.

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It’s still there (tho, much better) after I rebooted the app.

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I am closing down the tread. Info for anyone impacted: in my case apps reboot made them working without issues.