Debug & remove error logs on extension init

[dlqqq]

Description

When starting the v3-dev branch of jupyterlab/jupyter-ai, I see several error logs being printed in the terminal every time I start the JupyterLab:

[I 2024-12-04 10:56:20.168 ServerApp] Initializing room text:chat:41030a07-f29d-4ded-b13b-39dfda2b43bb
[E 2024-12-04 10:56:20.169 ServerApp] Failed to write message
    Traceback (most recent call last):
      File "/Users/dlq/micromamba/envs/jai3/lib/python3.11/site-packages/jupyter_collaboration/handlers.py", line 270, in send
        self.write_message(message, binary=True)
      File "/Users/dlq/micromamba/envs/jai3/lib/python3.11/site-packages/tornado/websocket.py", line 332, in write_message
        raise WebSocketClosedError()
    tornado.websocket.WebSocketClosedError

[I 2024-12-04 10:56:20.241 AiExtension] Registered chat handler `test` with command `/test`.
[E 2024-12-04 10:56:20.242 ServerApp] Failed to write message
    Traceback (most recent call last):
      File "/Users/dlq/micromamba/envs/jai3/lib/python3.11/site-packages/jupyter_collaboration/handlers.py", line 270, in send
        self.write_message(message, binary=True)
      File "/Users/dlq/micromamba/envs/jai3/lib/python3.11/site-packages/tornado/websocket.py", line 332, in write_message
        raise WebSocketClosedError()
    tornado.websocket.WebSocketClosedError
[E 2024-12-04 10:56:20.242 ServerApp] Failed to write message
    Traceback (most recent call last):
      File "/Users/dlq/micromamba/envs/jai3/lib/python3.11/site-packages/jupyter_collaboration/handlers.py", line 270, in send
        self.write_message(message, binary=True)
      File "/Users/dlq/micromamba/envs/jai3/lib/python3.11/site-packages/tornado/websocket.py", line 332, in write_message
        raise WebSocketClosedError()
    tornado.websocket.WebSocketClosedError
[E 2024-12-04 10:56:20.243 ServerApp] Failed to write message
    Traceback (most recent call last):
      File "/Users/dlq/micromamba/envs/jai3/lib/python3.11/site-packages/jupyter_collaboration/handlers.py", line 270, in send
        self.write_message(message, binary=True)
      File "/Users/dlq/micromamba/envs/jai3/lib/python3.11/site-packages/tornado/websocket.py", line 332, in write_message
        raise WebSocketClosedError()
    tornado.websocket.WebSocketClosedError

[brichet]

Thanks @dlqqq.

I think that these errors come from jupyter_collaboration.
Below is the console with a collaborative Notebook opened in the workspace, in an environment without jupyterlab-chat.

[I 2024-12-10 14:54:01.891 ServerApp] Initializing room json:notebook:70d90075-bd0b-45ec-ba9d-4435e8026f4a
[E 2024-12-10 14:54:01.892 ServerApp] Failed to write message
    Traceback (most recent call last):
      File "/home/brichet/mambaforge/envs/jupyter-collab/lib/python3.12/site-packages/jupyter_server_ydoc/handlers.py", line 268, in send
        self.write_message(message, binary=True)
      File "/home/brichet/mambaforge/envs/jupyter-collab/lib/python3.12/site-packages/tornado/websocket.py", line 332, in write_message
        raise WebSocketClosedError()
    tornado.websocket.WebSocketClosedError
[I 2024-12-10 14:54:01.990 ServerApp] Content in room json:notebook:70d90075-bd0b-45ec-ba9d-4435e8026f4a loaded from the ystore SQLiteYStore
[E 2024-12-10 14:54:02.053 ServerApp] Failed to write message
    Traceback (most recent call last):
      File "/home/brichet/mambaforge/envs/jupyter-collab/lib/python3.12/site-packages/jupyter_server_ydoc/handlers.py", line 268, in send
        self.write_message(message, binary=True)
      File "/home/brichet/mambaforge/envs/jupyter-collab/lib/python3.12/site-packages/tornado/websocket.py", line 332, in write_message
        raise WebSocketClosedError()
    tornado.websocket.WebSocketClosedError
[E 2024-12-10 14:54:02.055 ServerApp] Failed to write message
    Traceback (most recent call last):
      File "/home/brichet/mambaforge/envs/jupyter-collab/lib/python3.12/site-packages/jupyter_server_ydoc/handlers.py", line 268, in send
        self.write_message(message, binary=True)
      File "/home/brichet/mambaforge/envs/jupyter-collab/lib/python3.12/site-packages/tornado/websocket.py", line 332, in write_message
        raise WebSocketClosedError()
    tornado.websocket.WebSocketClosedError

[dlqqq]

@brichet Thanks for the quick research. Let's keep this issue open to track the upstream work that needs to be done on jupyter_collaboration.