-y does not confirm exit prompt

[laundmo]

Description

When running jupyter lab with -y and pressing ctrl+c to stop, it still prompts for "Shutdown this jupyter server"

Reproduce

1. Run jupyter lab with the -y flag
2. Press ctrl + C to stop jupyter lab
3. Observe it asking for a confirmation.

Expected behavior

I expect -y to skip the confirmation.

Context

Running in WSL, with a largely default config, where the only changed variables are:

c.ServerApp.browser = '/mnt/c/Program Files/Mozilla Firefox/firefox.exe'
c.ServerApp.use_redirect_file = False

• Operating System and version: Windwos 10 + WSL Ubuntu 18
• JupyterLab version: 3.0.2 (3.0.3 has another issue with authentication)

Command Line Output

jupyter lab --allow-root -y
[I 2021-01-09 14:42:36.621 ServerApp] jupyterlab | extension was successfully linked.
[I 2021-01-09 14:42:36.947 ServerApp] nbclassic | extension was successfully linked.
[I 2021-01-09 14:42:36.976 LabApp] JupyterLab extension loaded from /usr/local/lib/python3.6/dist-packages/jupyterlab
[I 2021-01-09 14:42:36.976 LabApp] JupyterLab application directory is /usr/local/share/jupyter/lab
[I 2021-01-09 14:42:36.979 ServerApp] jupyterlab | extension was successfully loaded.
[I 2021-01-09 14:42:36.984 ServerApp] nbclassic | extension was successfully loaded.
[I 2021-01-09 14:42:36.984 ServerApp] Serving notebooks from local directory: /mnt/d/user/Documents
[I 2021-01-09 14:42:36.984 ServerApp] Jupyter Server 1.2.1 is running at:
[I 2021-01-09 14:42:36.984 ServerApp] http://localhost:8888/lab?token=
[I 2021-01-09 14:42:36.984 ServerApp]  or http://127.0.0.1:8888/lab?token=
[I 2021-01-09 14:42:36.985 ServerApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 2021-01-09 14:42:36.992 ServerApp]
To access the server, open this file in a browser:
    file:///home/l/.local/share/jupyter/runtime/jpserver-15471-open.html
Or copy and paste one of these URLs:
    http://localhost:8888/lab?token=
 or http://127.0.0.1:8888/lab?token=

[W 2021-01-09 14:42:41.264 LabApp] Could not determine jupyterlab build status without nodejs

^C[I 2021-01-09 14:42:46.580 ServerApp] interrupted

Serving notebooks from local directory: /mnt/d/lauri/Documents

0 active kernels

Jupyter Server 1.2.1 is running at:

http://localhost:8888/lab?token=

or http://127.0.0.1:8888/lab?token=

Shutdown this Jupyter server (y/[n])?

[jasongrout]

Setting as 3.0, as it appears to be a regression linked to moving to Jupyter Server.

CC @Zsailer @blink1073 as well.

[jasongrout]

Looks like jupyter server -y also prompts on exit, instead of promptly exiting.

[jasongrout]

Actually, it looks like Jupyter Notebook 6.1.6 also prompts on exit, even if we give -y, so this is not a regression.

Looking through the code, it seems that the only place this answer_yes configuration is used is here: https://github.com/jupyter/jupyter_core/blob/ed132166c929fa9dff942a499e97bb29f33fc20f/jupyter_core/application.py#L119

It seems like it should also be used for the shutdown confirmation, but since it hasn't been like that (as far as I can tell) ever, it is not a regression, so I'm moving this off the 3.0 milestone. The discussion should probably should be taken up in the Jupyter Server repo rather than here.

[jasongrout]

@laundmo - can you file this issue in the Jupyter Server repo at https://github.com/jupyter-server/jupyter_server?

[laundmo]

@jasongrout im assuming you cannot transfer the issue? i will recreate it over there in a bit if you cant move it.

[jasongrout]

Right - we can't transfer issues across different orgs.

[jasongrout]

Moved to jupyter-server/jupyter_server#383