Update CustomErrorDecoder.java

spring-cloud-modules/spring-cloud-openfeign/src/main/java/com/baeldung/cloud/openfeign/config/CustomErrorDecoder.java

@@ -13,7 +13,7 @@ public class CustomErrorDecoder implements ErrorDecoder {
             case 400:
                 return new BadRequestException();
             case 404:
-                return new NotFoundException();
+                return new NotFoundException("Not found !!!");
             default:
                 return new Exception("Generic error");
         }