Facebook founder Mark Zuckerberg apologized for the "outage" caused after his social networking services went down for nearly six hours, affecting more than 3.500 billion users worldwide.
Sorry for the interruption today. I know how much you trust our services to stay connected with the people you care about, ”Zuckerberg apologized.
Facebook explained that during routine maintenance work, its engineers had issued a command that unintentionally cut off all connections on its network, "effectively shutting down Facebook's data centers globally."
Santosh Janardhan, the company's vice president of infrastructure, added that Facebook's program audit tool had an error and was unable to stop the command that caused the outage.
The outage also caused employees to lose access to internal tools, including those used by Facebook employees to correct such problems, the company said. Those tools included Facebook's internal email and even employee job passes.
Some reports suggest that Facebook's headquarters were in "collapse."
Facebook has said it is working to understand what happened so that it can "make our infrastructure more resilient." Tech experts have described the problem as similar to that of the social media giant falling off the internet map, so it could not be found.
The company said there was "no evidence that user data was compromised."