TL;DR

On October 19, 2025 AWS suffered an outage lasting over 24 hours. Ten days later they published the root cause analysis, revealing that a DNS failure in DynamoDB cascaded into EC2 and Network Load Balancer errors. A companion video breaks it down at key timestamps (0:00 summary, 5:30 DNS failure, 13:41 EC2 issues, 16:16 NLB errors) and links to the full RCA.

Beyond the outage deep-dive, Hussein Nasser sprinkles in links to his backend-engineering courses (OS basics, Node.js, databases, networking, NGINX, Python) and his YouTube membership/podcast for anyone who wants to level up.

Watch on YouTube