Jupyter "Kernel not created with name..." error

[ARF1]

I have been using the Python Interactive window and the Notebook editor for some time.

Just now however they stopped working (in the middle of me working with it) with the error message:

There was no "provocation" other than me pressing "restart kernel". Nothing new was installed in the last few days on the system. Restarting vscode did not help. Neither did restarting the entire system.

The referenced directory contains:

kernel.json contains:

{
 "argv": [
  "Z:\\Systemdateien\\Miniconda3\\envs\\numba47\\python.exe",
  "-m",
  "ipykernel_launcher",
  "-f",
  "{connection_file}"
 ],
 "display_name": "Python 3.7.5 64-bit ('numba47': conda)",
 "language": "python"
}

Environment:

• Windows 10
• python env installed with: conda create -n numba47 -c numba python=3 numba jupyter

[rchiodo]

Hmm, looks like the kernel was created. But we couldn't enumerate it.

Could you go to the command line and run this command:

jupyter kernelspec list

Does it list the kernel we attempted to create?

[rlevitin]

I am having the same problem after updating to the latest version of the extension. I am running on vscode with remote-ssh.

My directory looks the same as above

> jupyter kernelspec list
Available kernels:
python37364bitmrlungsegconda3ebe9caddf1648f297a0c7a14b090636 /home/rlevitin/.local/share/jupyter/kernels/python37364bitmrlungsegconda3ebe9caddf1648f297a0c7a14b090636
python3 /home/rlevitin/anaconda3/share/jupyter/kernels/python3

[ARF1]

@rlevitin Thanks for the hint. I downgraded the python extension to version 2019.11.50794 and all is well.

@rchiodo I ran jupyter kernelspec list in the vscode instance in which I had already tried several times to start the kernel, but no notebook editor were still open.

Still, plenty of kernels seem to be hanging around despite not being used:

Available kernels:
  8cec9b17-a085-4af0-9024-9eb293cd6cc0                          C:\Users\My User\AppData\Roaming\jupyter\kernels\8cec9b17-a085-4af0-9024-9eb293cd6cc0
  c24b6655-017e-4628-ae78-7f6b5df57f65                          C:\Users\My User\AppData\Roaming\jupyter\kernels\c24b6655-017e-4628-ae78-7f6b5df57f65
  python37564bitnumba47conda335d69007f3440b98da49ed2edb3733d    C:\Users\My User\AppData\Roaming\jupyter\kernels\python37564bitnumba47conda335d69007f3440b98da49ed2edb3733d
  python37564bitnumba47conda63570c72c81943db9412fefb70b4a044    C:\Users\My User\AppData\Roaming\jupyter\kernels\python37564bitnumba47conda63570c72c81943db9412fefb70b4a044
  python37564bitnumba47conda6e5bbbf96935406ba350e5a42c17ab3e    C:\Users\My User\AppData\Roaming\jupyter\kernels\python37564bitnumba47conda6e5bbbf96935406ba350e5a42c17ab3e
  python37564bitnumba47conda7bf9d553ab1b4930a24966c4b06b9a12    C:\Users\My User\AppData\Roaming\jupyter\kernels\python37564bitnumba47conda7bf9d553ab1b4930a24966c4b06b9a12
  python37564bitnumba47condaf6e7c02725b640d9bf065f5d1b94a5ea    C:\Users\My User\AppData\Roaming\jupyter\kernels\python37564bitnumba47condaf6e7c02725b640d9bf065f5d1b94a5ea
  python3                                                       Z:\Systemdateien\Miniconda3\envs\numba47\share\jupyter\kernels\python3

[rchiodo]

The root cause of this issue was new usage of 'conda -run' to run python code. This seems to fail in some cases.

[DonJayamanne]

@ARF1 @rlevitin
We believe we've fixed the issue. Please could you install the following extension and let me know whether it work now.
https://pvsc.blob.core.windows.net/extension-builds/ms-python-insiders-test.vsix

[superlightboy]

We believe we've fixed the issue. Please could you install the following extension and let me know whether it work now.

Thanks. I've been getting the exact same error since the update and this seems to have fixed the issue for me.

[DonJayamanne]

this seems to have fixed the issue for me.

By this, do you mean you installed the build I've included above?

[superlightboy]

By this, do you mean you installed the build I've included above?

Yes - after installing that build the issue is resolved.

[ARF1]

@ARF1 @rlevitin
We believe we've fixed the issue. Please could you install the following extension and let me know whether it work now.
https://pvsc.blob.core.windows.net/extension-builds/ms-python-insiders-test.vsix

@DonJayamanne Your test build works for me. I really appreciate you were so responsive!

[ARF1]

@DonJayamanne Found an additional bug in the test build that might be related to this. When working in the notebook editor and one presses "convert and save to a python script", there is a 1-2 second delay before the following message appears:

Module 'jupyter' not installed.

That is quite obviously wrong since I was working in the notebook editor...

Let me know if I should make a separate report or whether this has the same root cause as OP.

[DonJayamanne]

Let me know if I should make a separate report or whether this has the same root cause as OP.

Yes please

[greazer]

@ARF1, please reopen if this is not resolved in the next official release.