added `spring_metrics` path

src/main/java/org/gcube/datatransfer/resolver/services/SpringBootActuatorConfig.java

@@ -17,7 +17,7 @@ import org.springframework.context.annotation.Import;
 
 @Configuration
 @Import({ EndpointAutoConfiguration.class, PublicMetricsAutoConfiguration.class })
-@Path("metrics")
+@Path("spring_metrics")
 public class SpringBootActuatorConfig {
 
     @Bean

src/main/java/org/gcube/datatransfer/resolver/services/StorageIDResolver.java

@@ -169,6 +169,9 @@ public class StorageIDResolver {
 			//Reading the content size
 			size = metaFile.getSize();
 			LOG.debug("Read size {} from {}", size, StorageMetadataFile.class.getSimpleName());
+		}else {
+			//Bug fixing #28276
+			throw ExceptionManager.notFoundException(httpRequest, "Error on accessing the "+STORAGE_ID+ " '"+storageId+"'. Is it a valid id?", StorageIDResolver.class, help);
 		}
 
 		//CHECKING TO DEFAULT METADATA