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Add problem-details: global exception handling with RFC 9457

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Companion code for "Global Exception Handling with ProblemDetail (RFC 9457)
in Spring Boot 4". Thirteen failures under five handling setups (Boot
defaults, the Boot flag, a ResponseEntityExceptionHandler advice, advice
plus an ErrorController, a catch-all ordered first), validation errors,
i18n, content negotiation, Security's 401/403, silent 500s and decoding
on the client. 16 tests pin the behaviour.

Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01C3TETMrqVUWeFkNtz3Jbo3
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asmhatre
2026-09-11 17:12:22 +00:00
co-authored by Claude Opus 5
parent a065696478
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@@ -16,6 +16,7 @@ files.
| [`spring-aop/`](spring-aop) | [Spring AOP Explained](https://ankurm.com/) | every pointcut designator with real matches, JDK vs CGLIB proxies, six aspects that do not fire |
| [`docker-images/`](docker-images) | [Dockerizing Spring Boot 4: Layered Jars, Buildpacks, Distroless and Image Size Benchmarks](https://ankurm.com/dockerizing-spring-boot-4-layered-jars-buildpacks-distroless/) | one service packaged nine ways and measured: size on disk and pushed, rebuild delta, startup, PID 1 and signals, jlink, the JDK 25 AOT cache |
| [`kubernetes-deployment/`](kubernetes-deployment) | [Deploying Spring Boot 4 on Kubernetes](https://ankurm.com/spring-boot-4-kubernetes-probes-graceful-shutdown-cpu-limits-hpa/) | probe groups under a dependency outage, graceful shutdown under load four ways, JVM ergonomics per pod shape, CPU limits throttling GC, HPA on a Micrometer metric |
| [`problem-details/`](problem-details) | [Global Exception Handling with ProblemDetail (RFC 9457) in Spring Boot 4](https://ankurm.com/spring-boot-4-problemdetail-rfc-9457-global-exception-handling/) | thirteen failures under five handling setups, validation errors, i18n, content negotiation, errors outside MVC, silent 500s, decoding on the client |
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