Facebook late Monday blamed a major outage across its platforms on configuration changes it made to routers that coordinate network traffic between its data centers.
“This disruption to network traffic had a cascading effect on the way our data centers communicate, bringing our services to a halt,” Facebook vice president of infrastructure Santosh Janardhan said in a post.
Facebook battled dueling crises Monday as potentially billions of users were impacted when its dominant social network went offline for seven hours, and the company fought against a whistleblower’s damning revelations.
Many long-held fears and criticisms about the platform seem to have been backed up by Facebook’s own research, which ex-worker Frances Haugen has turned over to authorities and the Wall Street Journal.
But as US senators prepared for her highly anticipated Tuesday testimony on the documents, Facebook went offline in an outage that hit users across its platforms, including Instagram and WhatsApp.
“Billions of users have been impacted by the services being entirely offline today,” tracker Down detector wrote on its website.
Facebook apologized in a tweet later Monday Silicon Valley time, just as the apps started to go back online.
“We’ve been working hard to restore access to our apps and services and are happy to report they are coming back online now,” the company added.