Error 503 Backend is unhealthy

[queirozfcom]

Describe the bug

Trying to create a new item or viewing an existing one causes a 503 error.

To Reproduce

Try to render any new notebook on https://nbviewer.jupyter.org/

Expected behavior

Should work as previously

Screenshots

Desktop (please complete the following information):

• OS: Linux Ubuntu
• Browser: Chrome

[anhinga]

This was fixed and worked during the day (Monday, May 3), and now this does not work again.

This does not have to be a new notebook, it can be a notebook which was rendered successfully before.

[dirkroorda]

No notebook that I try gets rendered. Even the home page (https://nbviewer.jupyter.org) gives this error now

Error 503 Backend is unhealthy

Backend is unhealthy

Guru Mediation:

Details: cache-fra19139-FRA 1620107600 924050371

Varnish cache server

I am also trying this in Google Chrome with all website data cleared.

At the same time, http://status.jupyter.org says that nbviewer is 100% operational, that the 100% of the GitHub API limit is available. There are also no incidents reported today and yesterday, but the problem existed yesterday for sure.

Clearly, something in the management of this service does not work properly right now:

Frontend servers  ? Operational
GitHub API Operational
Fastly API Operational
Fastly Stats Operational
Fastly US East (IAD) Operational
Travis CI Linux Builds Operational

[dirkroorda]

NBViewer is working again.