In late October 2025, AWS suffered a DNS outage that lasted over 24 hours. A root-cause analysis released 10 days later showed a chain reaction: a failed DNS update in DynamoDB triggered EC2 errors, which then cascaded into Network Load Balancer failures.
The official AWS RCA (https://aws.amazon.com/message/101925/) breaks it down by timestamp: a quick summary at 0:00, Dynamo’s DNS loss at 5:30, EC2 error details at 13:41, and NLB issues at 16:16.
Watch on YouTube
Top comments (0)