Java Tech Workshop

Nov 7, 2026 · Backend Development

Why Your @Validated Annotations Silently Fail: Spring Boot Method Validation Proxy Pitfalls

This article dissects Spring Boot's three validation paths — request body, controller parameters, and service methods — revealing why @Validated on service methods silently fails without a proxy, and details proxy creation conditions, self-invocation traps, collection validation syntax, exception mapping, and debugging steps.