This Is The Reason For The October 4 Facebook Outage

The company says there's no evidence of user data leaks during downtime.


In a recent blog post, Facebook identified a reason for its October 4 outage. Thousands of users reported Facebook, WhatsApp, and Instagram outages yesterday. According to Facebook, configuration changes on their routers caused the crash. The company says the outage affected its internal tools, causing a delay in diagnosing the issue.

Santosh Janardhan, VP, Infrastructure at Facebook, published the update. In the post, the company also emphasized no evidence of user data leaks during downtime. The October 4 outage lasted roughly around 6 hours. This was the worst Facebook outage since 2019, when the site was down for over 24 hours.

Here’s an excerpt from the company’s blog post on the recent outage:

Our engineering team has learned that configuration changes on the backbone routers that coordinate network traffic between our data centers caused issues that interrupted this communication. This disruption to network traffic had a cascading effect on the way our data centers communicate, bringing our services to a halt.

Facebook blog post on October 4 outage

While the post identifies the configuration changes as the cause of the breakdown, it also says that Facebook is “working to understand more about what happened.” Facebook founder and CEO Mark Zuckerberg also posted an apology about the outage.

Manik Berry

Manik Berry

With a Master’s degree in journalism, Manik writes about big tech and has a keen eye for political-tech news. In his free time, he’s browsing the Kindle store for new stuff read. Manik also adores his motorcycle and is looking for new routes on weekends. He likes tea and cat memes. You can reach him at [email protected]
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