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SAN FRANCISCO: Facebook, Instagram, Messenger and WhatsApp were restored again late on Monday after a nearly six-hour outage that prevented the company’s users from accessing its social media and messaging services.
“Facebook, Instagram, WhatsApp and Messenger are coming back online now. Sorry for the disruption today — I know how much you rely on our services to stay connected with the people you care about,” said Facebook chief executive officer Mark Zuckerburg.
Facebook apologized but did not immediately explain what caused the failure, the largest ever tracked by web monitoring group Downdetector. As the world flocked to competing apps such as Twitter and TikTok, shares of Facebook fell 4.9%, their biggest daily drop since last November, amid a broader selloff in technology stocks on Monday. Shares rose about half a percent in after-hours trade following resumption of service.
“To every small and large business, family, and individual who depends on us, I’m sorry,” Facebook Chief Technology Officer Mike Schroepfer tweeted, adding that it “may take some time to get to 100%.”
Several Facebook employees who declined to be named said that they believed that the outage was caused by an internal mistake in how internet traffic is routed to its systems. The failures of internal communication tools and other resources that depend on that same network in order to work compounded the error, the employees said.
Security experts said an inadvertent mistake or sabotage by an insider were both plausible. Twitter on Monday reported higher-than-normal usage, which led to some issues in people accessing posts and direct messages.
— Twitter (@Twitter) October 4, 2021
In one of the day’s most popular tweets, video streaming company Netflix shared a meme from its new hit show “Squid Game” captioned “When Instagram & Facebook are down,” that showed a person labeled “Twitter” holding up a character on the verge of falling labeled “everyone.”
Facebook, which is the world’s largest seller of online ads after Google, was losing about $545,000 in US ad revenue per hour during the outage, according to estimates from ad measurement firm Standard Media Index. Past downtime at internet companies has had little long-term affect on their revenue growth.
Facebook’s services, including consumer apps such as Instagram, workplace tools it sells to businesses and internal programs went dark noon. Soon after the outage started, Facebook acknowledged users were having trouble accessing its apps but did not provide any specifics about the nature of the problem or say how many users were affected.
The error message on Facebook’s webpage suggested an error in the Domain Name System (DNS), which allows web addresses to take users to their destinations. A similar outage at cloud company Akamai Technologies took down multiple websites in July.
