diff --git a/weed/mq/client/sub_client/connect_to_sub_coordinator.go b/weed/mq/client/sub_client/connect_to_sub_coordinator.go
index fa58fbdff..e60243083 100644
--- a/weed/mq/client/sub_client/connect_to_sub_coordinator.go
+++ b/weed/mq/client/sub_client/connect_to_sub_coordinator.go
@@ -86,16 +86,19 @@ func (sub *TopicSubscriber) onEachAssignment(assignment *mq_pb.SubscriberToSubCo
 			defer wg.Done()
 			defer func() { <-semaphore }()
 			glog.V(1).Infof("subscriber %s/%s/%s assigned partition %+v at %v", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup, partition, broker)
-			sub.onEachPartition(partition, broker)
+			err := sub.onEachPartition(partition, broker)
+			if err != nil {
+				glog.V(0).Infof("subscriber %s/%s/%s partition %+v at %v: %v", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup, partition, broker, err)
+			}
 		}(assigned.Partition, assigned.Broker)
 	}
 
 	wg.Wait()
 }
 
-func (sub *TopicSubscriber) onEachPartition(partition *mq_pb.Partition, broker string) {
+func (sub *TopicSubscriber) onEachPartition(partition *mq_pb.Partition, broker string) error {
 	// connect to the partition broker
-	pb.WithBrokerGrpcClient(true, broker, sub.SubscriberConfig.GrpcDialOption, func(client mq_pb.SeaweedMessagingClient) error {
+	return pb.WithBrokerGrpcClient(true, broker, sub.SubscriberConfig.GrpcDialOption, func(client mq_pb.SeaweedMessagingClient) error {
 		subscribeClient, err := client.Subscribe(context.Background(), &mq_pb.SubscribeRequest{
 			Message: &mq_pb.SubscribeRequest_Init{
 				Init: &mq_pb.SubscribeRequest_InitMessage{