Cloudflare's outage was due to their blocklist getting too big: https://www.theverge.com/news/822869/cloudflare-is-down-outage-x-twitter-downdetector
The disruption, which started at around 6:20AM ET, is linked to a “configuration file that is automatically generated to manage threat traffic,” Cloudflare spokesperson Jackie Dutton tells The Verge. “The file grew beyond an expected size of entries and triggered a crash in the software system that handles traffic for a number of Cloudflare’s services.” Dutton added that “there is no evidence” of an attack or other malicious activity.
