The CloudFare outage aftermath
Fallout: For about an hour, if you tried to get to any CloudFare-connected site, all you'd get was a cryptic "No Route to Host" error message along with a mildly amusing sense of irony.
Fix: In a postmortem of the incident, CloudFare said a systemwide failure of edge routers -- which connect CloudFare's system to the rest of the Internet -- was the cause of the crash. While a few routers going down would typically cause traffic to be shifted, in this case, a bug took every single router offline at the same time.
Engineers found the offending code, cleared it out, then had to wait for teams in 23 data centers across 14 different countries to physically reboot all the routers.