🔸 TLDR
▪️ Use ProblemDetail to return consistent, machine-readable errors (status + title + detail + type + extra fields) ✅
🔸 CONTEXT
▪️ APIs often return random error shapes: sometimes {message}, sometimes {error}, sometimes HTML 😅
▪️ Clients hate guessing. Observability hates inconsistency.
▪️ ProblemDetail gives you a standard error contract (Problem Details for HTTP APIs — RFC 9457).
🔸 Snippet: custom 404 (ProblemDetail + @RestControllerAdvice)
🔸 Snippet: validation errors (return a list of field issues)
🔸 Takeaways
▪️ Standardize your error shape → clients stop “parsing strings” 🧠
▪️ Set type to a stable doc URL → self-explaining API 🔗
▪️ Add safe custom fields via setProperty(...) (traceId, errorCode, errors[]) 🧾
▪️ Don’t leak internals (stacktraces / SQL / secrets) 🔒
▪️ Centralize with @RestControllerAdvice for consistency ⚙️
#SpringBoot #SpringFramework #Java #API #REST #ErrorHandling #ProblemDetail
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