Failed to introspect annotation on interface com.xxx.xxx.ServerService:java.lang.NullPointerException
Failed to introspect annotation  org.springframework.web.bind.annotation.RequestMapping on public abstract java.lang.String com.xxx.xxx.ServerService.hello(): java.lang.annotation.AnnotationTypeMismatchException: incorrectly typed data found for annotation element public abstract java.lang.String[] org.springframework.web.bind.annotation.RequestMapping.value()

@FeignClient(name="aaa")
public interface ServerService {
         @RequestMapping("hello")
         String hello();
}