Virtual environment "user" not loaded when spawning

[MattMuffin]

Bug description

The following message is displayed when trying to launch the server (found using sudo journalctl -xeu jupyter-[USER].service -f )

Traceback (most recent call last):
File "/opt/tljh/user/bin/jupyterhub-singleuser", line 5, in
from jupyterhub.singleuser import main
File "/opt/tljh/user/lib/python3.10/site-packages/jupyterhub/singleuser/init.py", line 17, in
from .mixins import HubAuthenticatedHandler, make_singleuser_app
File "/opt/tljh/user/lib/python3.10/site-packages/jupyterhub/singleuser/mixins.py", line 26, in
from tornado import ioloop
ModuleNotFoundError: No module named 'tornado'

How to reproduce

Follow the install instructions here:

https://tljh.jupyter.org/en/latest/install/custom-server.html

sudo apt install python3 python3-dev git curl curl -L https://tljh.jupyter.org/bootstrap.py | sudo -E python3 - --admin <admin-user-name>

Expected behaviour

Server successfully launch

Actual behaviour

Error message regarding a module not being found

Your personal set up

• OS:
  ubuntu 22.04
  python 3.10.10

• Version(s):

Full environment

call the virtualenv: source /opt/jupyterhub/user/bin/activate
then check pip list

Package Version

---

alembic 1.12.0
anyio 4.0.0
argon2-cffi 23.1.0
argon2-cffi-bindings 21.2.0
arrow 1.2.3
asttokens 2.4.0
async-generator 1.10
async-lru 2.0.4
attrs 23.1.0
Babel 2.12.1
backcall 0.2.0
beautifulsoup4 4.12.2
bleach 6.0.0
brotlipy 0.7.0
certifi 2022.12.7
certipy 0.1.3
cffi 1.15.1
charset-normalizer 3.2.0
colorama 0.4.6
comm 0.1.4
conda 23.1.0
conda-package-handling 2.0.2
conda_package_streaming 0.7.0
cryptography 40.0.1
debugpy 1.8.0
decorator 5.1.1
defusedxml 0.7.1
exceptiongroup 1.1.3
executing 1.2.0
fastjsonschema 2.18.0
fqdn 1.5.1
greenlet 2.0.2
idna 3.4
ipykernel 6.25.2
ipython 8.15.0
ipywidgets 8.1.1
isoduration 20.11.0
jedi 0.19.0
Jinja2 3.1.2
json5 0.9.14
jsonpointer 2.4
jsonschema 4.19.0
jsonschema-specifications 2023.7.1
jupyter_client 8.3.1
jupyter_core 5.3.1
jupyter-events 0.7.0
jupyter-lsp 2.2.0
jupyter-resource-usage 1.0.1
jupyter_server 2.7.3
jupyter_server_terminals 0.4.4
jupyter-telemetry 0.1.0
jupyterhub 4.0.2
jupyterlab 4.0.6
jupyterlab-pygments 0.2.2
jupyterlab_server 2.25.0
jupyterlab-widgets 3.0.9
libmambapy 1.4.1
Mako 1.2.4
mamba 1.4.1
MarkupSafe 2.1.3
matplotlib-inline 0.1.6
mistune 3.0.1
nbclient 0.8.0
nbconvert 7.8.0
nbformat 5.9.2
nbgitpuller 1.2.0
nest-asyncio 1.5.8
notebook 7.0.3
notebook_shim 0.2.3
oauthlib 3.2.2
overrides 7.4.0
packaging 23.1
pamela 1.1.0
pandocfilters 1.5.0
parso 0.8.3
pexpect 4.8.0
pickleshare 0.7.5
pip 23.2.1
platformdirs 3.10.0
pluggy 1.0.0
prometheus-client 0.17.1
prompt-toolkit 3.0.39
psutil 5.9.5
ptyprocess 0.7.0
pure-eval 0.2.2
pycosat 0.6.4
pycparser 2.21
Pygments 2.16.1
pyOpenSSL 23.1.1
PySocks 1.7.1
python-dateutil 2.8.2
python-json-logger 2.0.7
PyYAML 6.0.1
pyzmq 25.1.1
referencing 0.30.2
requests 2.31.0
rfc3339-validator 0.1.4
rfc3986-validator 0.1.1
rpds-py 0.10.3
ruamel.yaml 0.17.32
ruamel.yaml.clib 0.2.7
Send2Trash 1.8.2
setuptools 65.6.3
six 1.16.0
sniffio 1.3.0
soupsieve 2.5
SQLAlchemy 2.0.20
stack-data 0.6.2
terminado 0.17.1
tinycss2 1.2.1
tomli 2.0.1
toolz 0.12.0
tornado 6.3.3
tqdm 4.65.0
traitlets 5.10.0
typing_extensions 4.8.0
uri-template 1.3.0
urllib3 1.26.15
wcwidth 0.2.6
webcolors 1.13
webencodings 0.5.1
websocket-client 1.6.3
wheel 0.40.0
widgetsnbextension 4.0.9
zstandard 0.19.0

# paste output of `pip freeze` or `conda list` here

Configuration

# jupyterhub_config.py

Logs

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