Facebook said late Monday that the company believes a "faulty configuration" change caused a widespread outage that lasted roughly six hours.
"Our engineering teams have learned that configuration changes on the backbone routers that coordinate network traffic between our data centers caused issues that interrupted this communication," Facebook's vice president of engineering and infrastructure, Santosh Janardhan, said in a blog post. "This disruption to network traffic had a cascading effect on the way our data centers communicate, bringing our services to a halt."
Monday's outage also impacted the tools that Facebook employees use. Facebook said it hasn't found any evidence that user data was compromised during the outage.
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