Restarting Jupyter kernel is stuck and never finishes

[marhoy]

Applies To

• Notebooks (.ipynb files)
• Interactive Window and/or Cell Scripts (.py files with #%% markers)

What happened?

Not sure if it related, but dependencies in my project is manager by uv. I have installed ipykernel (8.30.0) as a dev-dependency in the project which uses Python-3.12.8. In the Notebook, I have selected the .venv-kernel as my kernel.

When I start using the Notebook, everything works fine. But after running / restarting it a couple of times, it gets stuck on restarting the kernel. The notification window shows:

And in the Jupyter Output, the last thing to be shown is:

11:00:30.125 [info] Restart requested ~/Projects/olt-chatbot/Testing3.ipynb
11:00:30.146 [info] Process Execution: ~/Projects/olt-chatbot/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"

The problem doesn't occur if I just open the Notebook and then reload it a lot of times. It typically happens after having worked with the Notebook for some minutes, running some code and restarting the Notebooks a couple of times.

I'm sorry I'm not able to describe the problem any better, will continue to investigate reasons...

VS Code Version

Version: 1.96.2 (user setup) Commit: fabdb6a30b49f79a7aba0f2ad9df9b399473380f Date: 2024-12-19T10:22:47.216Z Electron: 32.2.6 ElectronBuildId: 10629634 Chromium: 128.0.6613.186 Node.js: 20.18.1 V8: 12.8.374.38-electron.0 OS: Windows_NT x64 10.0.22631

Jupyter Extension Version

2024.11.0

Jupyter logs

Coding Language and Runtime Version

Python v3.12.8

Language Extension Version (if applicable)

Python extension 2024.22.0

Anaconda Version (if applicable)

No response

Running Jupyter locally or remotely?

N/A or Not sure