504 when using store pages

[popey]

Expected behaviour

Pages perform well.

Steps to reproduce the problem

Sometimes, I get a 504 error when visiting storefront pages such as https://snapcraft.io/newsflash/settings or https://snapcraft.io/newsflash/releases. Typically this continues for a while, taking ages to respond, then eventually it just "fixes itself"

I get a blank page with the big Times New Roman 504 error at the top.

Unfortunately I don't see any easy way to debug it.

Specs

• URL: https://snapcraft.io/newsflash/settings
• Operating system: Ubuntu 21.04
• Browser: Google Chrome

[tbille]

@jkfran Theory:

• The error message is sent by nginx, this means we can't find any logs that could help to debug
• It's possible that we are making an API requests to dashboard, this requests is taking long not timing out
• Gunicorn will timeout after 30 seconds and stop the session
• nginx takes over and throws a 504

I might be wrong, the problem here is that no logs is being recorded and no sentry errors 😓

What do you think?

What we could try:

• request some logs (at least some durations and httpstatus) from store team
• try to deploy the docker image on microk8s and see how could we reproduce this error (slow connection, mock api etc etc)

[kz6fittycent]

I can confirm @popey's issue. I am getting the same (504) error any time I visit https://snapcraft.io/snaps - releases, builds, or metrics.

OS: Pop!_OS 20.10
Browser: Brave

[jkfran]

Hi! This issue is a duplicate of #3585. We dedicated time to it (see #3585 (comment) for all the changes).

I consider this issue to be gone but if you experience this issue again please feel free to reopen. Thank you.