Jupyter run hangs on start, notebook starts fine

JupyterLab
1

Hello, please help me debug this issue.

I just upgraded my macOS to 12.2 and I cannot start jupyter lab. This is what happens:

$ jupyter run --debug
[RunApp] Searching ['/Users/markov/tmp', '/Users/markov/.jupyter', '/Users/markov/tmp/test-env/etc/jupyter', '/usr/local/etc/jupyter', '/etc/jupyter'] for config files
[RunApp] Looking for jupyter_config in /etc/jupyter
[RunApp] Looking for jupyter_config in /usr/local/etc/jupyter
[RunApp] Looking for jupyter_config in /Users/markov/tmp/test-env/etc/jupyter
[RunApp] Looking for jupyter_config in /Users/markov/.jupyter
[RunApp] Looking for jupyter_config in /Users/markov/tmp
[RunApp] Looking for jupyter run_config in /etc/jupyter
[RunApp] Looking for jupyter run_config in /usr/local/etc/jupyter
[RunApp] Looking for jupyter run_config in /Users/markov/tmp/test-env/etc/jupyter
[RunApp] Looking for jupyter run_config in /Users/markov/.jupyter
[RunApp] Looking for jupyter run_config in /Users/markov/tmp
[RunApp] Connection File not found: /Users/markov/Library/Jupyter/runtime/kernel-49330.json
[RunApp] Instantiating kernel 'Python 3 (ipykernel)' with kernel provisioner: local-provisioner
[RunApp] Starting kernel: ['/Users/markov/tmp/test-env/bin/python3.9', '-m', 'ipykernel_launcher', '-f', '/Users/markov/Library/Jupyter/runtime/kernel-49330.json']
[RunApp] Connecting to: tcp://127.0.0.1:50308
[RunApp] connecting iopub channel to tcp://127.0.0.1:50305
[RunApp] Connecting to: tcp://127.0.0.1:50305
[RunApp] connecting shell channel to tcp://127.0.0.1:50304
[RunApp] Connecting to: tcp://127.0.0.1:50304
[RunApp] connecting stdin channel to tcp://127.0.0.1:50306
[RunApp] Connecting to: tcp://127.0.0.1:50306
[RunApp] connecting heartbeat channel to tcp://127.0.0.1:50307
[RunApp] connecting control channel to tcp://127.0.0.1:50308
[RunApp] Connecting to: tcp://127.0.0.1:50308
[RunApp] jupyter run: starting...

I can see 2 python processes, but nothing happens. Strangely, jupyter notebook command works fine and launches kernel, opening the browser window.

This is a fresh install in a separate virtualenv:

jupyter              1.0.0
jupyter-client       7.1.2
jupyter-console      6.4.0
jupyter-core         4.9.1
jupyterlab-pygments  0.1.2
jupyterlab-widgets   1.0.2
notebook             6.4.8

$ python -V
Python 3.9.9

Thank you

2

What does jupyter run do?

3

Well, it prints that output above and then hangs, does nothing, I don’t know what it’s doing, but waiting for 10 minutes yielded nothing

4

I’m guessing jupyter run is like jupyter lab or jupyter notebook in that the jupyter application starts up the thing that’s being specified. However, I am wondering what run is.

5

Thank you!
I now got your question and I feel stupid. I assumed (for some reason) that jupyter run will start the jupyter lab. Turns out jupyter lab is a separate package and it runs ok when installed.

6

Still, I wonder what jupyter run does. Maybe every time we run the command something wonderful happens. :slight_smile:

7

I think it runs a notebook (if you specify it) Running the Notebook — Jupyter Documentation 4.1.1 alpha documentation

1 Like
8

Since I see people do occasionally follow that link, I’m going to clarify some. Here correctly states, " jupyter run is actually a jupyter-client CLI, which runs a Python script, not a notebook."
It is jupyter execute that runs a notebook on the command line as covered later in that thread. Presently, the documentation mxposed links to still has it wrong; that situation with the documentation looks to be finally being addressed perhaps.