App link code is not updated when notebook is modified

[darrickyee]

Describe the issue

I created the linked notebook by importing (uploading) a notebook file. In the molab workspace I also uploaded a .db file and .parquet file.

In molab, I edited cell 2 to use pl.read_parquet instead of the original pl.read_database_uri.

The linked notebook correctly reflects the change.

However, the "Copy App Url" provides the link https://molab.marimo.io/notebooks/nb_WQ8BbHoseCKcoLRV9No47b/app. When clicking "Show code," what appears is the original code with pl.read_database_uri in cell 2.

In short,
https://molab.marimo.io/notebooks/nb_WQ8BbHoseCKcoLRV9No47b <- code is correct (up-to-date)
https://molab.marimo.io/notebooks/nb_WQ8BbHoseCKcoLRV9No47b/app <- code is incorrect (doesn't reflect changes)

Notebook URL (optional)

https://molab.marimo.io/notebooks/nb_WQ8BbHoseCKcoLRV9No47b

marimo version (optional)

No response

Issue category

Sharing / embedding

Steps to reproduce

1. Open the linked notebook (https://molab.marimo.io/notebooks/nb_WQ8BbHoseCKcoLRV9No47b). Note the contents of cell 2.
2. Append "/app" to the notebook link to open the App Url.
3. Click the three-dot menu on the upper right and select "Show code."
4. The contents of cell 2 are not the same as the contents shown in step 1.

Expected behavior

Code from https://molab.marimo.io/notebooks/nb_WQ8BbHoseCKcoLRV9No47b expected to be the same as code in https://molab.marimo.io/notebooks/nb_WQ8BbHoseCKcoLRV9No47b/app.

Browser (optional)

No response

[mscolnick]

Yes, this was by design (we don't want to change/teardown apps while people are using them), but I can see the use-case when it is just you developing on it.

We can surface a way to shutdown existing apps, so when you launch them, they will have the latest code.

[lukesdm]

Is there a workaround to this? E.g., does the app endpoint automatically close after a certain amount of inactivity?

[lukesdm]

😬 Not sure if this is related, but after a few minutes, the notebook changes I made after starting the /app endpoint were reverted.

[mscolnick]

Is there a workaround to this? E.g., does the app endpoint automatically close after a certain amount of inactivity?

yes it does. it's around 30 minutes of inactivity if no one is connected (although this activity sensitivity changes based on usage and recalling sandboxes for other users).

Not sure if this is related, but after a few minutes, the notebook changes I made after starting the /app endpoint were reverted.

We will look into this, there have been known issues with persisting storage (especially for larger files), but not the actual notebook.py being reverted