DOWNLOADING CONCEPT: 1. THE MICROSERVICES NIGHTMARE...
↳When you split a monolith into 50 microservices, you suddenly have a massive networking problem.
↳What happens if Service A calls Service B, but B is temporarily slow? Service A needs a timeout.
↳It needs a retry loop.
↳It needs a circuit breaker to stop overwhelming B.
↳Before Service Mesh, developers had to hardcode all this networking logic (retries, timeouts, metrics) into every single application using libraries like Netflix Hystrix.
↳This meant duplicating complex networking code across Node.js, Python, and Java services.
▲ LIVE INCIDENTYou deployed a new microservice, but when it tries to curl the Payment Service, it receives a '503 Service Unavailable'.