AWS Outage: A Cautionary Tale of Cascading Failures
The Ripple Effect of a Single Misconfiguration On October 20th, 2025, Amazon Web Services (AWS) experienced a significant outage in its US-EAST-1 Region, affecting numerous cloud services, including AWS Lambda, Amazon API Gateway, and Amazon Appflow. The incident serves as a reminder of the potential consequences of a single misconfiguration, which can quickly escalate into a cascade of failures. The issue began with a misconfigured DNS, which soon affected EC2 launches, causing errors and disruptions to various services. Despite initial confidence in resolving the problem, the situation worsened, with the Lambda service experiencing significant recovery issues. The outage had a profound impact on major online businesses, including Snapchat, Reddit, Venmo, and Apple Music, which rely heavily on AWS. ...