By skyforbes 
When the Lights Went Out in the AWS Cloud: A Diwali Story
It was Diwali — a time for light, laughter, and celebration. Across India and around the world, homes were glowing with diyas, people were connecting with their loved ones, and the sky was full of colourful lights, crackers. Even engineers at AWS were joining in the festivities, lighting diyas and fireworks to mark the festival of lights.
But just as families were sharing Diwali wishes on WhatsApp and shopping online, something unexpected happened. One by one, popular apps started having problems — WhatsApp, Amazon, Alexa, Signal, Reddit, and many others faced disruptions. People couldn’t connect, messages wouldn’t go through, and websites slowed to a crawl.
A failure in a core system-whether a physical fire or, as in a real-world incident, a subtle software bug in the DynamoDB…