java-error-model

Standardize API error responses by mapping internal exceptions to a consistent RFC 9457 Problem Details payload, including fields like type, title, status, detail, and extensions like errorCode and traceId for machine-readable client integrations.

Map Java exceptions to HTTP status codes deterministically by defining stable error codes and applying a consistent contract across HTTP-based services, ensuring clients receive predictable validation errors and correlation identifiers for debugging.

Add field-level validation errors and traceId to OpenAPI Problem Details by extending the RFC 9457 payload with validation specifics and correlation identifiers, generating a machine-readable OpenAPI contract with tests to validate determinism.

RFC 9457 Problem Details works with OpenAPI contracts by defining a reusable Problem payload with extensions like errorCode, traceId, and timestamp, ensuring backend API errors remain consistent and machine-readable across HTTP services.

You need RFC 9457 Problem Details when API clients require a consistent, machine-readable error envelope to improve integrations and observability, replacing inconsistent error formats with deterministic exception-to-status mappings and stable error codes.

Limitations of using RFC 9457 include the need to configure all non-2xx responses to emit the Problem Details payload and validate mapping determinism with contract tests, requiring upfront standardization across HTTP-based services.