vllm.entrypoints.serve.exception_handling.register

vLLM Exception handlers are registered in four layers: 1. framework errors raised by FastAPI/Starlette 2. vLLM-specific errors dispatched via a single VLLMError handler 3. fallback handlers for raw exceptions not yet migrated to VLLMError 4. the raw Exception handler as a safety net Registering specific exception types (rather than only Exception) ensures they are handled by ExceptionMiddleware (inside the Prometheus middleware) rather than ServerErrorMiddleware (outside it), so their status codes are recorded correctly.