Jupyter Server: No Kernel Python: Not Started

[bigrat911]

Bug: Notebook Editor, Interactive Window, Editor cells

Steps to cause the bug to occur

1. Open VS Code
2. Cmd+Shift+P, Creat New Jupyter

Actual behavior

Jupyter Server: No Kernel
Python: Not Started

Error: [Errno 13] Permission denied: '/Users/XXXXX/Library/Jupyter/kernels/python37364bitbasecondac02285ab1a5b43e69345d43980645608'
Perhaps you want sudo or --user?

Expected behavior

Jupyter Server worked well

Your Jupyter and/or Python environment

Please provide as much info as you readily know

• Jupyter server running: Local
• Extension version: 2020.1.58038-xxx
• VS Code version: 1.41.1
• Setting python.jediEnabled: true
• Python and/or Anaconda version: 3.7.3
• OS: Mac
• Virtual environment: conda

Developer Tools Console Output

Microsoft Data Science for VS Code Engineering Team: @rchiodo, @IanMatthewHuff, @DavidKutu, @DonJayamanne, @greazer

[rchiodo]

Thanks for the bug. Are you running VS code as the same user as yourself? Seems odd that we wouldn't be able to write to your users folder.

[bigrat911]

Thanks for the bug. Are you running VS code as the same user as yourself? Seems odd that we wouldn't be able to write to your users folder.

Yes, looks strange. I am running it as the same user as myself, and I don't know how to use another user.
I wonder is "Jupyter Server: No Kernel Python: Not Started" normal??

[rchiodo]

It should have that status before you run any cells, but then it should register the kernel. It looks like it's not able to write to the user location on disk.

Does that place actually exist? Is this location writable by you?

/Users/XXXX/Library/Jupyter/Kernels

[lhl2617]

https://www.reddit.com/r/vscode/comments/eq2bfv/vs_code_jupyter_server_no_kernel_python_not/

For some reason this fixed the issue for me - hopefully it's helpful.

[rchiodo]

It's supposed to say no server/no kernel until you run. That's by design. That's not the issue @bigrat911 is seeing though. When @bigrat911 runs a cell, it still doesn't work because we can't write the kernel.json file to their user directory.

[brando90]

@rchiodo thanks for the help so far. I read through the whole issue but I am confused/unsure what "fix" you are referring to. Do you mind telling me what the instructions are or what you are referring to?

[weijiew]

I also encountered the same problem, the webpage could not be opened, how to solve this problem, thanks.

[rchiodo]

This issue is a problem with VS code writing to the /users/<user name>/library/jupyter/kernels folder. If you're having this issue it would show this problem in the console output (Help | Toggle Developer Tools, click on the console page).

There is another problem where if conda doesn't get activated, you can't run any jupyter code. There's multiple issues related to that:
https://github.com/microsoft/vscode-python/issues/9566 (which the fix is already in our insider's build)
https://github.com/microsoft/vscode-python/issues/8928 (which is currently being worked on).

@brando90 I believe your problem was entirely to do with conda not being setup right. I believe? @DonJayamanne helped you out in the comments for microsoft/vscode-python#9105

@weijew I'm not sure what your problem is. What webpage could not be opened?

[brando90]

@brando90 I believe your problem was entirely to do with conda not being setup right. I believe?

sort of. I used the same .bashrc and .zshrc files in pycharm and their jupyter feature worked fine. I shouldn't need to change my files for vs code to work...specially if my terminal works normal regardless of those files etc...that's my 2 cents.

But yes, for now we found a solution to it.

[weijiew]

Thanks for your answer, I solved the problem. Something went wrong with my conda activation

[janosh]

@rchiodo Even with the hints in this thread so far, I'm unable to resolve the issue. Still getting Jupyter Server: No Kernel, Python: Not Started. My console shows the following errors

Error Python Extension: 2020-01-27 13:24:05: Failed to serialize gatherRules for DATASCIENCE.SETTINGS [TypeError: Cannot convert object to primitive value at Array.join () at Array.toString () at /Users/janosh/.vscode/extensions/ms-python.python-2020.2.59126-dev/out/client/extension.js:1:12243 at Array.forEach () at Object.l [as sendTelemetryEvent] (/Users/janosh/.vscode/extensions/ms-python.python-2020.2.59126-dev/out/client/extension.js:1:12160) at y.sendSettingsTelemetry (/Users/janosh/.vscode/extensions/ms-python.python-2020.2.59126-dev/out/client/extension.js:75:708637) at y.r.value (/Users/janosh/.vscode/extensions/ms-python.python-2020.2.59126-dev/out/client/extension.js:1:92097) at Timeout._onTimeout (/Users/janosh/.vscode/extensions/ms-python.python-2020.2.59126-dev/out/client/extension.js:1:90616) at listOnTimeout (internal/timers.js:531:17) at processTimers (internal/timers.js:475:7)]

t.log @ console.ts:137
console.ts:137 [Extension Host] Error Python Extension: 2020-01-27 13:24:11: Failed to create File hash for interpreter /usr/local/Caskroom/miniconda/base/envs/old-env/bin/python [Error: ENOENT: no such file or directory, lstat '/usr/local/Caskroom/miniconda/base/envs/old-env/bin/python'] { errno: -2, code: 'ENOENT', syscall: 'lstat', path: '/usr/local/Caskroom/miniconda/base/envs/old-env/bin/python'}

The first is probably unrelated but the second seems to suggest that it's looking for a kernel in an old deleted conda environment. I looked in

/Users/janosh/Library/Jupyter/kernels/python361064bitoldenvconda79da1f2e6bbd4084ac835e29ddf1536d

and replaced all mentions of oldenv with newenv. Made no difference, the error remains. I checked the permissions: drwxr-xr-x. Nothing unusual AFAICT. At this point I wonder where the reference to the old env is even coming from.

[rchiodo]

@janosh what does jupyter kernelspec list show?