Problem observed:

1. as part of our Notebook scale testing, with 300 users starting with 3s delay (user-level testing).
2. with the API-level notebook scale testing, with 20 users continuously launching and destroying notebooks within 10 minutes.

Description of problem:

After logging into JupyterLab, an empty page is shown.

Prerequisites (if any, like setup, operators/versions):

Steps to Reproduce

1. Launch a notebook (Data Science image) and wait for it to be ready
2. Log in into it and authorize the service account access

It's not 100% clear to me if the issue happens before or after Step 2.

Actual results:

• With ODS-CI (user-level): JupyterLab returns an empty page.
• With Locust (API-level): JupyterLab returns an empty response (no HTTP code, no content)

Expected results:

The JupyterLab logo and page show up

Reproducibility (Always/Intermittent/Only Once):

Only in the scale test.

The locust (API-level) scale test can be easily executed locally, the issue appears often enough.

Build Details:

Workaround:

Reload the page.

Additional info: