Yes, sorry! We're investigating, but my current theory is we got overloaded because I relaxed some of our anti-crawler protections a few days ago. (The reason I did that is that the anti-crawler protections also unfortunately hit some legit users, and we don't want to block legit users. However, it seems that I turned the knobs down too far.) In this case, we also had a secondary failure: PagerDuty woke me up at 5:24…
what type of protections are used on HN? rate-limiting? ip range blacklist?