We now know that on October 19, 2025, AWS suffered a global outage lasting over 24 hours when its DNS system unexpectedly failed. After a ten-day investigation, the official root cause analysis revealed exactly how the DNS records for the Dynamo service were wiped out—and how that dominoed into EC2 and Network Load Balancer errors.
The accompanying video walks you through the highlights with timestamps: a quick summary at 0:00, a dive into Dynamo’s DNS meltdown at 5:30, EC2 fallout at 13:41, and NLB hiccups at 16:16. For the full technical deep dive, check out AWS’s own RCA here: https://aws.amazon.com/message/101925/
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