ModuleNotFoundError: No module named 'jupyterhub'

JupyterHub
1

Hi,

I just ran a do-release-upgrade un Unbuntu.
After that jupyterhub does not start anymore…

the log shows:

Feb 28 07:24:06 unbuntuserver systemd[1]: Started jupyterhub.service - JupyterHub.
Feb 28 07:24:07 unbuntuserver jupyterhub[961]: Traceback (most recent call last):
Feb 28 07:24:07 unbuntuserver jupyterhub[961]: File “/opt/jupyterhub/bin/jupyterhub”, line 5, in
Feb 28 07:24:07 unbuntuserver jupyterhub[961]: from jupyterhub.app import main
Feb 28 07:24:07 unbuntuserver jupyterhub[961]: ModuleNotFoundError: No module named ‘jupyterhub’
Feb 28 07:24:07 unbuntuserver systemd[1]: jupyterhub.service: Main process exited, code=exited, status=1/FAILURE
Feb 28 07:24:07 unbuntuserver systemd[1]: jupyterhub.service: Failed with result ‘exit-code’.

Please help!
How can I anyalyse this further?
Maybe there are known causes or even solutions?

Thanx a lot!

Marc

2

on a terminal on that machine, when I

source /opt/jupyterhub/bin/activate

I even get…

Traceback (most recent call last):
File “/opt/jupyterhub/bin/pip”, line 5, in
from pip._internal.cli.main import main
ModuleNotFoundError: No module named ‘pip’

3

Did you upgrade your Python version? It might be easiest to create a new virtualenv and reinstall all your requirements.

4

sorry for the delay, I was away :slight_smile:

No, I myself did not change anything. Only the upgrade did…

Unfortunately this got me very confused! I did not really get the internal workings. Do I have to create a virtualenv with the same name and this is used automatically?

thank you for your reply!

Marc

5

If you recreate an environment at the same path, it will be used automatically, yes.

It may work best to run the tljh bootstrap again to recreate the jupyterhub environment.