Intermittently, I get 502 Bad Gateway errors using HTTPS on en.wikipedia.org while logged in. The footer reads "nginx/1.1.1.9" or similar. https://en.wikipedia.org/wiki/List_of_Anything_Muppets is a sample URL. A browser window refresh solves the issue, but we should investigate and address what's causing these intermittent errors.
Version: wmf-deployment
Severity: normal