The outage was caused by the loss of IP routes to the Facebook Domain Name System (DNS) servers, which were all self-hosted at the time. It lasted for 7 hours and 11 minutes.ĭuring the outage, many users flocked to Twitter, Discord, Signal, and Telegram, resulting in disruptions on these sites' servers. The outage also prevented anyone trying to use " Log in with Facebook" from accessing third-party sites.
On October 4, 2021, at 15:39 UTC, the social network Facebook and its subsidiaries, Messenger, Instagram, WhatsApp, Mapillary, and Oculus, became globally unavailable for a period of six to seven hours. Traffic volume for Facebook services during Octoglobal outage.
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