Software Bug Caused Global Internet Outage, Fastly Claims

The global internet outage that resulted in many popular high-traffic websites and platforms going offline on Tuesday was caused by a software bug, claims San Francisco based cloud computing services provider Fastly according to The Hill.

“We experienced a global outage due to an undiscovered software bug that surfaced on June 8 when it was triggered by a valid customer configuration change,” Nick Rockwell, Fastly’s senior vice president of engineering and infrastructure, said in a blog post late Tuesday.

Rockwell said that the issue lead caused outages for a number of highly-trafficked websites including The New York Times, Bloomberg News, the Financial Times, The Guardian and Reddit.

“On May 12, we began a software deployment that introduced a bug that could be triggered by a specific customer configuration under specific circumstances,” Rockwell wrote.

“Early June 8, a customer pushed a valid configuration change that included the specific circumstances that triggered the bug, which caused 85% of our network to return errors. We detected the disruption within one minute, then identified and isolated the cause, and disabled the configuration. Within 49 minutes, 95% of our network was operating as normal,” he added.

Rockwell acknowledged that the circumstances that caused the outage were specific, but stated that Fastly would be looking into how it operated during the incident and determine why it did not detect the bug sooner.

“This outage was broad and severe, and we’re truly sorry for the impact to our customers and everyone who relies on them,” Rockwell wrote.

Fastly runs a network of geographically dispersed servers across 26 countries meant to improve websites’ reliability and speed by cutting down the distance between users and servers. The arrangement allows customer websites to store data closer to users which means the content shows up faster when users visit those websites.

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