The cause of the 502 errors appears to be frequent segfaults within PHP-FPM. We're continuing to investigate.
Posted Feb 09, 2022 - 20:15 UTC
We've received reports of sporadic 502 Bad Gateway errors. The error will typically manifest as a blue page with the text, "CDN Error (5XX) Bad Gateway." Preliminary investigation indicates that this error is rare. It's safe to ignore this error if you receive it. We'll continue investigating.
Posted Feb 09, 2022 - 16:37 UTC
This incident affected: Forums, Blog and Server infrastructure (Backend servers).