The San Francisco-based company said the outage was caused by a “noteworthy” double failure in its data centers. When one system fails, a parallel one is meant to take over, but two systems coincidentally stopped working at around the same time, Twitter said.
“I wish I could say that today's outage could be explained by the Olympics or even a cascading bug,” Mazen Rawashdeh, VP of engineering, said in a statement apologizing to users. “Instead, it was due to this infrastructural double-whammy.”
He apologized for giving its users “zilch” instead of the service, saying the company is “investing aggressively” in its systems to avoid a repeat situation.