error-handling-backend-java

Global exception handling in a Spring Boot REST API is implemented using @RestControllerAdvice to centralize error catching, map custom domain exceptions to HTTP status codes, and return a consistent ApiResponse envelope to the client.

An API error envelope is a standardized JSON response structure for error details. You need it for Java error handling to ensure consistent client-facing error formats across all endpoints, which simplifies client-side parsing and improves API reliability.

Add correlation IDs to SLF4J logging in Spring Boot by using the MDC (Mapped Diagnostic Context) to inject unique identifiers into your structured logs, enabling traceable requests across distributed system components during debugging.

Yes, you can use Resilience4j with Spring Boot for error handling to add optional resilience layers around external calls, providing automated retry logic and circuit breaking to prevent cascading API failures.

The best way to standardize error responses across Spring Boot applications is to establish a domain exception hierarchy mapped through a global RestControllerAdvice, ensuring every thrown exception resolves into a uniform ApiResponse structure.

This Spring Boot error handling pattern requires no external dependencies for its core global exception handling and SLF4J MDC logging features, though Resilience4j is used optionally for external call resilience.