They finally posted the full details on the AWS outage that started October 19, 2025: a DNS failure that knocked out DynamoDB, EC2 and Network Load Balancers for over a day. Ten days later, AWS published the root cause analysis, exposing exactly how DNS lookups went awry and triggered cascading service errors.
The accompanying video breaks down the incident (0:00 summary, 5:30 Dynamo’s DNS meltdown, 13:41 EC2 errors, 16:16 NLB issues) and the post is peppered with links to backend courses on operating systems, Node.js, networking, databases, NGINX, Python and more.
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