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How to Calculate Application Readiness Using Database, Redis, Solace, Certificates and Startup State In a Kubernetes or OpenShift environment, a microservice being running does not necessarily mean it is ready…
How do you safely move money at massive scale without charging the customer twice? Imagine this simple scenario: You have ₹500 in your account and try to pay a merchant…
Most interview questions test your memory. Great interview questions test your engineering judgment. Over the years, I've interviewed hundreds of Java developers ranging from fresh graduates to Solution Architects. One…
Understanding JVM Memory, CPU, Requests, Limits, and Production Sizing "If you're still sizing your Java application based only on -Xmx, you're sizing it for a virtual machine, not for Kubernetes."…
Externalizing Configuration with ConfigMaps, Secrets, Spring Profiles, and Feature Flags "The best deployment is the one where the application binary never changes. Only its configuration does." Wednesday Morning, 7:45 AM…
Why "Running" Doesn't Mean Your Application Is Ready "A container can be running, the JVM can be alive, and yet your application may still be incapable of serving a single…
Why Every Spring Boot Developer Must Understand SIGTERM Before Running on Kubernetes "Deploying a new version is easy. Deploying it without your customers noticing—that's engineering." Friday Evening, 6:00 PM It's…
Building Cloud-Native Java Applications Instead of Containerized Monoliths "Running a Spring Boot application inside a container doesn't automatically make it cloud-native. Kubernetes can orchestrate your application, but it cannot fix…
How Customer Requests Reach the Right Spring Boot Pod Sarah's deployment has finally reached an important milestone. The Payment Service has been deployed successfully. The kubelet has started the container.…
Why a Running Spring Boot Application Doesn't Always Mean It's Ready Sarah watches the deployment dashboard. Everything appears normal. NAME READY STATUS RESTARTS AGE payment-service-84bd67f6df-j9dkt 1/1 Running 0 18s The…