Facebook said in a blog post Monday night that the six-hour power outage that took it offline along with Instagram, Messenger, Whatsapp and OculusVR was the result of a configuration change to its routers — not of a hack or attempt to access user data. The explanation does not provide very detailed information, but it appears that Facebook’s machines were unable to talk to each other – Facebook says that “this disruption of network traffic had a cascading effect on our data center communication, stopping our services. ”
CEO Mark Zuckerberg sent an apology Monday night, saying the platforms came back online. “Excuse the disruption today – I know how much you trust our services to stay connected with the people you care about.”
The interruption began around noon. 11:40 A MONDAY and led to extensive problems for the company. It was Facebook’s worst outage since 2019, when the page was down for more than 24 hours. Employees could not connect to each other on the company’s bulletin boards, and some told The edge the used Outlook e-mail accounts provided by the work to communicate.
The problems seemed to start with a routine BGP update that went wrong and wiped out the DNS routing information that Facebook needs in order for other networks to find its sites.
Facebook’s interruption came a day before whistleblower Frances Haugen had to stop testifying before Congress about her experiences in the company. Haugen, a former Facebook product manager who worked on his Civic Integrity group, provided a series of internal Facebook documents to journalists at Wall Street Journal. She told 60 minutes Sunday that Facebook “pays for its profits with our security.”