change infof to Errorf in some codes

federation/pkg/federation-controller/cluster/clustercontroller.go

@@ -123,7 +123,7 @@ func (cc *ClusterController) GetClusterStatus(cluster *federation_v1beta1.Cluste
 		glog.Infof("It's a new cluster, a cluster client will be created")
 		client, err := NewClusterClientSet(cluster)
 		if err != nil || client == nil {
-			glog.Infof("Failed to create cluster client, err: %v", err)
+			glog.Errorf("Failed to create cluster client, err: %v", err)
 			return nil, err
 		}
 		clusterClient = *client

federation/pkg/federation-controller/service/endpoint_helper.go

@@ -62,7 +62,7 @@ func (cc *clusterClientCache) syncEndpoint(key, clusterName string, clusterCache
 	}
 	endpointInterface, exists, err := clusterCache.endpointStore.GetByKey(key)
 	if err != nil {
-		glog.Infof("Did not successfully get %v from store: %v, will retry later", key, err)
+		glog.Errorf("Did not successfully get %v from store: %v, will retry later", key, err)
 		clusterCache.endpointQueue.Add(key)
 		return err
 	}

federation/pkg/federation-controller/service/service_helper.go

@@ -65,7 +65,7 @@ func (cc *clusterClientCache) syncService(key, clusterName string, clusterCache
 	}
 	serviceInterface, exists, err := clusterCache.serviceStore.GetByKey(key)
 	if err != nil {
-		glog.Infof("Did not successfully get %v from store: %v, will retry later", key, err)
+		glog.Errorf("Did not successfully get %v from store: %v, will retry later", key, err)
 		clusterCache.serviceQueue.Add(key)
 		return err
 	}

federation/pkg/federation-controller/service/servicecontroller.go

@@ -819,7 +819,7 @@ func (s *ServiceController) syncService(key string) error {
 	// obj holds the latest service info from apiserver
 	obj, exists, err := s.serviceStore.Store.GetByKey(key)
 	if err != nil {
-		glog.Infof("Unable to retrieve service %v from store: %v", key, err)
+		glog.Errorf("Unable to retrieve service %v from store: %v", key, err)
 		s.queue.Add(key)
 		return err
 	}

pkg/controller/deployment/deployment_controller.go

@@ -481,7 +481,7 @@ func (dc *DeploymentController) syncDeployment(key string) error {
 
 	obj, exists, err := dc.dStore.Indexer.GetByKey(key)
 	if err != nil {
-		glog.Infof("Unable to retrieve deployment %v from store: %v", key, err)
+		glog.Errorf("Unable to retrieve deployment %v from store: %v", key, err)
 		return err
 	}
 	if !exists {

pkg/controller/namespace/namespace_controller.go

@@ -185,7 +185,7 @@ func (nm *NamespaceController) syncNamespaceFromKey(key string) (err error) {
 		return nil
 	}
 	if err != nil {
-		glog.Infof("Unable to retrieve namespace %v from store: %v", key, err)
+		glog.Errorf("Unable to retrieve namespace %v from store: %v", key, err)
 		nm.queue.Add(key)
 		return err
 	}