jupyter python notebook showing kernel error

Question

I am accessing jupyterhub notebook through browser as it is running on a remote server(using nginx so that jupyterhub is accessible to client machines).When I access the notebook a kernel error is shown at the top of the screen. Jupyterhub and jupyter notebook is running on a kubernetes cluster and the jupyter notebook is a custom built docker image suitable for python programming. I am very new into python/jupyter hub/notebook, please suggest how to resolve the kernel error.

Answer 1

Please check kernel.json file, check if the path to the Python executable is correct

for example my kernel.json looks like this, in my case the Python binary is located at C:/Users/Vinod/Anaconda/envs/env_name/python

Check the path in your case

{
 "argv": [
  "C:/Users/Vinod/Anaconda/envs/env_name/python",
  "-m",
  "ipykernel_launcher",
  "-f",
  "{connection_file}"
 ],
 "display_name": "Python 3",
 "language": "python"
} 

Note: env_name refers to the anaconda environment you are using

Answer 2

you should use this command

jupyter kernelspec remove python3

python3 is name of kernel at my end, it can be yours. after than run jupyter notebook again from command prompt.