Home About Archives Search Feed


Cloudflare outage caused by bad software deploy (updated)

🔒 blog.cloudflare.com

Actually caused by a regular expression change.

Unfortunately, one of these rules contained a regular expression that caused CPU to spike to 100% on our machines worldwide. This 100% CPU spike caused the 502 errors that our customers saw. At its worst traffic dropped by 82%.

Reminds me of that great saying…

Some people, when confronted with a problem, think I know, I’ll use regular expressions.” Now they have two problems. (source)

🤪

Posted on July 8, 2019








← Next post    ·    Previous post →