Shepherd Advanced Notes

May 8, 2025 · Backend Development

Missing Parameter Validation Can Crash a Spring Boot Service – A Complete Guide

A real‑world incident where an unchecked null request parameter caused a full‑table query, massive memory usage and OOM is examined, then Spring Boot’s validation framework—including manual checks, annotation‑driven constraints, nested and group validation, and global exception handling—is demonstrated step‑by‑step with code samples.