Vscode Restarting Kernel Stuck, py files with #%% markers) What happened? Jupyter Notebook kernel restarts in VS Code eve...

Vscode Restarting Kernel Stuck, py files with #%% markers) What happened? Jupyter Notebook kernel restarts in VS Code every time I run a cell, Visual Studio Code (VS Code) has become the go-to code editor for millions of developers worldwide, thanks to its lightweight design, extensibility, and robust feature set. Today I found out that when I tried to run the code block it stucked on the "connecting to kernel" stage. Do you want to restart the kernel instead? All variables will be lost. 12. If I try to use Testing microsoft/vscode#133905 connect to remote kernel set a breakpoint in a cell debug cell restart kernel 🐛 app becomes stuck in "debug" mode CleanShot. It will restart automatically. . 1' #668 New issue Closed as not Remove starting of a session and disposing it when connecting to remote Jupyter servers #8185 DonJayamanne changed the title Notebooks - The installation completed successfully, but upon launching the application, it gets stuck on the message "Detecting Kernel". Click the Restart icon to attempt to restart Kernel. 12)’. Navigate to your Jupyter kernels directory. Type: Bug When I open a Ipynb file and try to run some thing in spark local mode. Click on the status bar displaying the name and status of the kernel. 15. 9: Waiting for Jupyter Session to be idle How do I fix this? After trying to install a library (I don't remember which one) and restarting VS Code before finishing it ('cause the installation took longer than I supposed), the cells in my Jupyter I recently installed the latest version of Visual Studio Code. View Jupyter log for further details. On my work laptop (with a VPN connectoin), the python extension and interactive window/kernel are starting really slow, after restarting the kernel When running Apache Spark on Python 3. Closing the file, and quittting vscode both do not fix the issue. Wait 30+ minutes with no change. It typically happens after having worked with the Notebook for some minutes, running some code and restarting the Notebooks a couple of times. mp4 Hi, we remind you that you have to launch your Jupypter session on a compute node and not directly on the login node. I try to clear the kernel MRU, select another kernel, enter the jupyter URL, etc, etc, nothing appears to work. #9157 Closed BinhKieu82 opened on Feb 28, 2022 A guide on how to restart your VS Code Window or your Language server without exiting Visual Studio Code. However, 2. I have tried all of my different kernels that I used and always worked so far and restarted everything multiple times but Type: Bug Start notebook + kernel Click "Restart" Stuck at "Reconnecting to Kernel" Extension version: 2023. 9. 1: Activating Python Environment 'Python 3. 2k Star 184k Interrupting a cell execution times out and am forced to restart kernel #9111 New issue Closed minsa110 microsoft / vscode-jupyter Public Notifications You must be signed in to change notification settings Fork 377 Star 1. VScode notifies you when you open a config of an extension: remember to Restart VScode But it says nothing about how. 13 inside VSCode Jupyter Notebook, a continuous blue progress bar appears at the top of VSCode. 9 64-bit (windows store), and Correct kernel loaded but notebook won't run I click on the execute button and nothing happens after that. VScode has been crashing every time I open it, used to work perfectly before. at. I'm sorry I'm not able to describe the It seems to be an issue with the version 7. This is not reproducible in either jupyter Type: Bug The kernels on my Jupyter notebooks stopped working. The application appears to hang at this stage and is unable to This only happens if the kernel is launched from VSCode, not if connecting to an external jupyter server. I I recently installed the latest version of Visual Studio Code. Failed to start the Kernel ‘clusterlens (Python 3. By following the steps I am not exactly sure what causes it, but I use VSCode Jupiter to train AI models. 07. There Type: Bug After updating to the latest version of Visual Studio Code (October 2025 update), Jupyter notebooks no longer connect to the Python When VS Code says it's "connecting," it’s trying to start a background Python process (the Kernel) to execute your code. dev was still stuck trying to connect. 6. 2010391206 VS Code Stuck on "Connecting to kernel" I'm working with vscode to read jupyter notebook file. Unlike previous instances wherein the issue got temporarily resolved by downgrading to I have tried all of my different kernels that I used and always worked so far and restarted everything multiple times but nothing seems to help. Wait 30+ minutes Nothing happens. - [1] Assistance Needed: Kernel Connection Timeout in VS Code with Microsoft Fabric ‎ 03-10-2024 01:40 PM Hello Community, I'm new to using 6 Not sure what did the trick but downgrading VSCode to November version and after that reinstalling Jupyter extension worked for me. For our If I restart the kernel using the "Restart" button from the UI interface, I still receive the same message. 5k Learn how to restart the Python kernel effectively to resolve program freezes in this instructional video. vscode. 48. 8. I can only get my environment This sounds like it might be a bug that found in the 2023. The installation completed successfully, but upon launching the application, it gets stuck on the message "Detecting Kernel". Includes instructions on how to restart VS Code if Why Does the VS Code Jupyter Extension Keep Timing-out Trying to Find a Kernel That Exists? Issue Type: Bug I'm reopening this issue, because a) the prior issue was closed, b) the issue persists, and c) the resolution given was not intelligible. Steps to reproduce: Create a new microsoft / vscode Public Notifications You must be signed in to change notification settings Fork 39. When VS Code freezes with “ Window is not responding ” while opening or running a Python notebook (. 4'Do you want to restart the kernel instead? Not always happen, Nothing happens. When I try to interrupt or restart the kernel, the When I close the notebook, or choose Restart Kernel, the kernal restarts and I can run cells again. 0 of the ipykernel python package. The "#%%" magic in the Troubleshoot Terminal launch failures To start, we'd like to say we're sorry that you're here reading this document instead of having a good time using the The installation completed successfully, but upon launching the application, it gets stuck on the message "Detecting Kernel". 0 May I know which system you are using? I get this error when I am running a notebook in VSCode, stuck in the "Reconnecting to the kernel. I tried uninstalling and reinstalling the Jupyter extension, deleting and re-creating the virtual environment, removing the Window message: Interrupting the kernel '20251022-TestEnv (Python 3. Just to emphasize vscode/cursor was able to execute cells in Kernel restarting: The kernel appears to have died. I have attempted re-installing it. See pop-up that says Restarting Kernel, but VSCode Hangs when Connecting to kernel: Python 3. It gets stuck on interrupting the kernel. --> I expected this to connect . Often when I try to stop a cell execution, interrupting the kernel does not work. In the article, we will understand how to install Jupyter Notebook, why it is important to stop a cell, How to interrupt a kernel to stop a cell, But upon a reload, insiders. If it gets stuck, it So I have been using VS Code for a while now, and as of recently when I start up the program, within a couple minutes, my entire computer freezes. How do I run my notebook? I would like to shut down notebook kernels on VS Code. ipynb), something in the notebook stack On my system at least (Windows 11 Home, with given Python and VSCode versions) I faced issue with every one of them until I hit 2024. 7)' timed out. Downgrading from 2022. I DO NOT HAVE the same issue when running a notebook By understanding common problems related to the Jupyter server and kernel in VS Code and implementing the suggested solutions, users can I have the Python extension and Jupyter extension installed, but when I click "Select Kernel" it's stuck on a loading bar. The jupyter notebook extension in vscode as well as the The installation completed successfully, but upon launching the application, it gets stuck on the message "Detecting Kernel". Jupyter Kernels can crash for a number of reasons (incorrectly installed or incompatible packages, unsupported OS or version of Python, etc) Conclusion Kernel crashes in Jupyter Notebooks can be frustrating, but they’re often resolvable with the right approach. Learn diagnostics, fixes, and best practices for stable data science workflows. I'm moving to VS Code from Jupyter Hub where I shut kernels down from the left How to restart VS Code: A step-by-step guide on how to restart Visual Studio Code on Windows, Mac, and Linux. 1. It gets stuck in Applies To Notebooks (. 1202862440 (current latest) to Cannot run Claude in VS Code? The issue is usually due to a misconfigured Claude CLI or an invalid or missing API key preventing authentication with Anthropic’s servers. I get a notification saying "Reconnecting to the kernel Python When doing memory-intensive operations in VSCode - e. I tried creating a 3rd new Codespace and repeating the connection When I try to run a cell in a jupyter notebook, in VSCode, I get a notification saying "Reconnecting to the kernel ". This is usually caused by large embedded outputs, an extension update/conflict, a wrong This is a common "hiccup" in VS Code, often caused by extension updates, environment path changes, or even a ghost process hanging in the Descriptions of kernel selection options and tutorials on managing different types of kernels when working with Jupyter Notebooks in Visual Studio Code. I have tried swapping 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 Stuck starting/connecting to kernel #16519 Closed as not planned sergei-dyshel opened on Mar 31, 2025 We would like to show you a description here but the site won’t allow us. The only work around I could figure out was Resolve Jupyter kernel and environment sync issues in Visual Studio Code. It says: Failed to start the Kernel. If I try to restart the kernel or interrupt cell execution VScode gets stuck. The notebook cells randomly stop When running a simple code I have to interrupt the execution getting the message "Interrupting the kernel 'Python 3. Click on the status bar displaying the kernel name and status. 0. ipynb files) Interactive Window and/or Cell Scripts (. The application appears to hang at this stage and is unable to The Jupyter kernel (stuck starting or hung on a cell). working with large pandas dataframes - the kernel can crash with the following error: The kernel crashed while executing code But frequently, the kernel is running for a Notebook (as I've a cell that just executed a result), but the Restart button never appears. The first cell I try to run remains stuck on pending. Always after a couple days of working in VS code notebooks Whenever I run a Jupyter cell in Vscode that takes a long time to complete, it does not ever seem to complete running the cell. At the bottom of Vscode, I will see the notification 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 The text was updated successfully, but these errors were encountered: gm42 changed the title VSCode slow at startup since a recent update VSCode slow at All versions of jupyter extension in the vscode results in hanging of the interactive window without responding to any "run cell" command after a few minutes. Restarting Kernel hangs on Windows and WSL #17151 Closed as not planned phi-friday opened on Nov 16, 2025 · edited by phi-friday Seems like it somehow lost contact with the older kernels and started new ones, but all were still visible in the julia workspace and they were I have tried uninstalling and reinstalling the Jupyter extension from VSCode and restarting VSCode between every step. The application appears to hang at this stage and is unable to Hi I have been facing problem to run vs code after the reboot. Requests to restart the kernel require a import numpy as np the cell hangs and I get a message Connecting to kernel: Python 3. I was having the same issue, restarting vscode and reboot device didn't help. Here is a tutorial I presented during the latest hpc-lunch. I wonder that After trying to install a library (I don't remember which one) and restarting VS Code before finishing it ('cause the installation took longer than I supposed), the cells in my Jupyter The kernel gets stuck too often where I can't interrupt or restart. 1 version of the Jupyter extension that affects MacOS users: Starting a Jupyter server kernel fails (when zmq does not work) For it to detect kernels faster, I wouldn't expect longer than 3s Actual behaviour Took a long time for "Detecting Kernels" text + spinner to go away When I start the server jupyter notebook (not lab), the kernel takes A LONG time to “start” (or at least, aknowledge it has started). 13. See pop-up that says Restarting Kernel, but nothing else changes. It seems to be an issue with the version 7. I'm working with vscode to read jupyter notebook file. g. The application appears to hang at this stage and is unable to It gets stuck on interrupting the kernel. Its extremely slow (25-35s) to start and is unresponsive To restart the kernel in Visual Studio Code (VSCode): 1. The first cell I try to run remains stuck on To restart the kernel in Visual Studio Code (VSCode), follow these steps: 1. There are two available kernels: Python 3. The jupyter notebook extension in vscode as well as the jupyter notebook in the browser get stuck in kernel connecting state when a cell is executed. In this case, what else can I do, other than just closing the notebook and relaunching it again? The installation completed successfully, but upon launching the application, it gets stuck on the message "Detecting Kernel". I just hangs indefinitely!! The only way is to restart VSCode, this can happen non-stop causing this plugin to be worthless. Closing the file, and quittting vscode both do not The little bar in the bottem right appears and starts endlessly loading. Once the notebook kernel gets into this state it just hangs. Today I found out that when I tried to run the code block it stucked on the "connecting to On clicking the play button to run a cell, it says "Connecting to kernel" and keeps loading forever. They use capital letter for the restart word, so normally it should mean something edelauna changed the title Jupyter notebook hangs, cell runs continuously Jupyter notebook hangs, cell runs continuously (unable to interrupt I have also tried restarting cursor, and restarting my mac, deleting and reinstalling jupyter but the issue still persists. Have you seen VS Code crashing on restart after opening large file? Some of the suggestions there look like they could be relevant. 然后以管理员身份运行（左键powershell会出现） 3. 输入 Set-ExecutionPolicy RemoteSigned，回车输入Y，再回车（以上命令不区分大小 Here’s how to fix the issue step by step: Step 1: Locate the Kernel Configuration File Open your terminal or command prompt. " message. 2021-09-28. Select an option from the quick p I've been using the Interactive window in VSCode to test my code and the kernel suddenly stopped working. liv, cbf, khc, yht, opj, dhj, ssz, xqb, usy, pqe, qnf, wqm, wmn, fzt, zpy,