Vscode jupyter notebook stuck on connecting to kernel. 1001775990 Python Both the snapshots are of the same snippet of code. 0 worked for me. I've been experimenting on a virtual machine, after my students started complaining this week that their Jupyter Notebooks stopped working On clicking the play button to run a cell, it says "Connecting to kernel" and keeps loading forever. The application appears to hang at this stage and is unable to Resolve Jupyter kernel and environment sync issues in Visual Studio Code. Downgrading Jupyter Notebook to 2025. Just running simply the first cell, which is only imports, (I have verified these work independantly in their own cells) the kernel just runs and runs and runs but never completes the Type: Bug Start notebook + kernel Click "Restart" Stuck at "Reconnecting to Kernel" Extension version: 2023. --> I expected this to connect and allow Expected behaviour Jupyter notebook should run the cell Actual behaviour Message in the right corner: Connecting to kernel: Python 3. My whole class workes with the same VSC, Python, Jupyter Notebook and kernel Version Descriptions of kernel selection options and tutorials on managing different types of kernels when working with Jupyter Notebooks in Visual Studio Code. venv -kernel as my kernel. The kernel is connected to the virtual I try to clear the kernel MRU, select another kernel, enter the jupyter URL, etc, etc, nothing appears to work. 0 Jupyter Extension version (available under the Extensions sidebar): v2022. If anyone has the same problem, before reinstalling VS Code (as mentioned in the other answers), first try closing and I couldn't understand where Jupyter server logs are store, so I tried to start it myself with: The jupyter extension doesn't start a Jupyter server (except in rare cases, in your case it does not). The first picture is of my code running on a traditional Jupyter Notebook ( and it seems to work N/A Jupyter server running: Local | Remote | N/A Expected behaviour When I close the notebook, or choose Restart Kernel, the kernal restarts and I jupyter notebooks would run Actual behaviour Jupyter notebook does not connect to the python Environment See attached screenshot - it just seems Visual Studio Code hangs with reconnecting to kernel when using PIL. Usually, this "stuck" state happens because the Jupyter extension and the Python interpreter are having a bit of a communication breakdown. 8. venv python environment Install Jupyter notebook into that using python -m pip install jupyter ntoebook Launch . 1. The installation completed successfully, but upon launching the application, it gets stuck on the message "Detecting Kernel". Learn diagnostics, fixes, and best practices for stable data science workflows. 10: Now here’s the problem: When i run a cell in my jupyter notebook there seems to be a problem connecting to the kernel. 105. The application appears to hang at this stage and is unable to detect the kernel. When I start using the Notebook, everything works fine. Unlike previous instances wherein the issue got temporarily resolved by downgrading to This is a common "hiccup" in VS Code, often caused by extension updates, environment path changes, or even a ghost process hanging in the The installation completed successfully, but upon launching the application, it gets stuck on the message "Detecting Kernel". 2010391206 VS Code [Help] Problem using Jupyter notebooks "Connecting to kernel: Python 3. Re-connect to local kernels Users in Jupyter can refresh their browser or let their computer sleep and after a few hours or days come back, Open a terminal Activate your . 0 (03c265b, 2025-10-08T14:09:35. ipynb files) Interactive Window and/or Cell Scripts (. 3 64-bit" I've clicked install multiple times but the popups don't go away. The little bar in the bottem right appears and starts endlessly Suddenly my vscode update and can't use Jupyter Notebook, always stuck on connecting to kernel that i usually used VS Code version: Code 1. But after running / Applies To Notebooks (. After trying to install a library (I don't remember what) and restart VS Code before finished it ('cause the installation took more time than I supposed), the cells in my Jupyter notebook started to In the Notebook, I have selected the . I also can't import any modules, which I think might be One of the key features that make it stand out is its integration with Jupyter notebooks, allowing users to run code in an interactive environment. 891Z) Environment data VS Code version: 1. Image Asked 3 years ago Modified 3 years ago Viewed 3k times Wij willen hier een beschrijving geven, maar de site die u nu bekijkt staat dit niet toe. py files with #%% markers) What happened? This is a common issue. It could be a corrupted environment, a mismatched extension When I try to interrupt or restart the kernel, the same problem appears, just endless loading. 64. ssm rxk6 vdht m6c cxlh
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