diff --git a/weed/mq/broker/broker_grpc_pub.go b/weed/mq/broker/broker_grpc_pub.go
index 3ca10d258..5686f8dd9 100644
--- a/weed/mq/broker/broker_grpc_pub.go
+++ b/weed/mq/broker/broker_grpc_pub.go
@@ -55,15 +55,11 @@ func (b *MessageQueueBroker) PublishMessage(stream mq_pb.SeaweedMessaging_Publis
 	var p topic.Partition
 	if initMessage != nil {
 		t, p = topic.FromPbTopic(initMessage.Topic), topic.FromPbPartition(initMessage.Partition)
-		localTopicPartition = b.localTopicManager.GetTopicPartition(t, p)
-		if localTopicPartition == nil {
-			localTopicPartition, err = b.loadLocalTopicPartitionFromFiler(t, p)
-			// if not created, return error
-			if err != nil {
-				response.Error = fmt.Sprintf("topic %v partition %v not setup: %v", initMessage.Topic, initMessage.Partition, err)
-				glog.Errorf("topic %v partition %v not setup: %v", initMessage.Topic, initMessage.Partition, err)
-				return stream.Send(response)
-			}
+		localTopicPartition, err = b.loadLocalTopicPartition(t, p)
+		if err != nil {
+			response.Error = fmt.Sprintf("topic %v partition %v not setup: %v", initMessage.Topic, initMessage.Partition, err)
+			glog.Errorf("topic %v partition %v not setup: %v", initMessage.Topic, initMessage.Partition, err)
+			return stream.Send(response)
 		}
 		ackInterval = int(initMessage.AckInterval)
 		stream.Send(response)
@@ -148,6 +144,14 @@ func (b *MessageQueueBroker) PublishMessage(stream mq_pb.SeaweedMessaging_Publis
 	return nil
 }
 
+func (b *MessageQueueBroker) loadLocalTopicPartition(t topic.Topic, p topic.Partition) (localTopicPartition *topic.LocalPartition, err error) {
+	localTopicPartition = b.localTopicManager.GetTopicPartition(t, p)
+	if localTopicPartition == nil {
+		localTopicPartition, err = b.loadLocalTopicPartitionFromFiler(t, p)
+	}
+	return localTopicPartition, err
+}
+
 func (b *MessageQueueBroker) loadLocalTopicPartitionFromFiler(t topic.Topic, p topic.Partition) (localTopicPartition *topic.LocalPartition, err error) {
 	self := b.option.BrokerAddress()
 
diff --git a/weed/mq/broker/broker_grpc_pub_balancer.go b/weed/mq/broker/broker_grpc_pub_balancer.go
index 418921ba3..4edceb8a0 100644
--- a/weed/mq/broker/broker_grpc_pub_balancer.go
+++ b/weed/mq/broker/broker_grpc_pub_balancer.go
@@ -21,12 +21,12 @@ func (b *MessageQueueBroker) PublisherToPubBalancer(stream mq_pb.SeaweedMessagin
 	initMessage := req.GetInit()
 	var brokerStats *pub_balancer.BrokerStats
 	if initMessage != nil {
-		brokerStats = b.Balancer.OnBrokerConnected(initMessage.Broker)
+		brokerStats = b.Balancer.AddBroker(initMessage.Broker)
 	} else {
 		return status.Errorf(codes.InvalidArgument, "balancer init message is empty")
 	}
 	defer func() {
-		b.Balancer.OnBrokerDisconnected(initMessage.Broker, brokerStats)
+		b.Balancer.RemoveBroker(initMessage.Broker, brokerStats)
 	}()
 
 	// process stats message
diff --git a/weed/mq/broker/broker_server.go b/weed/mq/broker/broker_server.go
index 9ef277f4d..31a6e10ef 100644
--- a/weed/mq/broker/broker_server.go
+++ b/weed/mq/broker/broker_server.go
@@ -67,6 +67,8 @@ func NewMessageBroker(option *MessageQueueBrokerOption, grpcDialOption grpc.Dial
 	}
 	mqBroker.MasterClient.SetOnPeerUpdateFn(mqBroker.OnBrokerUpdate)
 	pub_broker_balancer.OnPartitionChange = mqBroker.Coordinator.OnPartitionChange
+	pub_broker_balancer.OnAddBroker = mqBroker.Coordinator.OnAddBroker
+	pub_broker_balancer.OnRemoveBroker = mqBroker.Coordinator.OnRemoveBroker
 
 	go mqBroker.MasterClient.KeepConnectedToMaster()
 
diff --git a/weed/mq/pub_balancer/balancer.go b/weed/mq/pub_balancer/balancer.go
index 0bcbdd51b..d44c68720 100644
--- a/weed/mq/pub_balancer/balancer.go
+++ b/weed/mq/pub_balancer/balancer.go
@@ -33,6 +33,8 @@ type Balancer struct {
 	// Collected from all brokers when they connect to the broker leader
 	TopicToBrokers cmap.ConcurrentMap[string, *PartitionSlotToBrokerList] // key: topic name
 	OnPartitionChange func(topic *mq_pb.Topic, assignments []*mq_pb.BrokerPartitionAssignment)
+	OnAddBroker func(broker string, brokerStats *BrokerStats)
+	OnRemoveBroker func(broker string, brokerStats *BrokerStats)
 }
 
 func NewBalancer() *Balancer {
@@ -42,7 +44,7 @@ func NewBalancer() *Balancer {
 	}
 }
 
-func (balancer *Balancer) OnBrokerConnected(broker string) (brokerStats *BrokerStats) {
+func (balancer *Balancer) AddBroker(broker string) (brokerStats *BrokerStats) {
 	var found bool
 	brokerStats, found = balancer.Brokers.Get(broker)
 	if !found {
@@ -51,10 +53,11 @@ func (balancer *Balancer) OnBrokerConnected(broker string) (brokerStats *BrokerS
 			brokerStats, _ = balancer.Brokers.Get(broker)
 		}
 	}
+	balancer.OnAddBroker(broker, brokerStats)
 	return brokerStats
 }
 
-func (balancer *Balancer) OnBrokerDisconnected(broker string, stats *BrokerStats) {
+func (balancer *Balancer) RemoveBroker(broker string, stats *BrokerStats) {
 	balancer.Brokers.Remove(broker)
 
 	// update TopicToBrokers
@@ -65,6 +68,7 @@ func (balancer *Balancer) OnBrokerDisconnected(broker string, stats *BrokerStats
 		}
 		partitionSlotToBrokerList.RemoveBroker(broker)
 	}
+	balancer.OnRemoveBroker(broker, stats)
 }
 
 func (balancer *Balancer) OnBrokerStatsUpdated(broker string, brokerStats *BrokerStats, receivedStats *mq_pb.BrokerStats) {
diff --git a/weed/mq/sub_coordinator/coordinator.go b/weed/mq/sub_coordinator/coordinator.go
index 269c12e66..1ad539cfb 100644
--- a/weed/mq/sub_coordinator/coordinator.go
+++ b/weed/mq/sub_coordinator/coordinator.go
@@ -99,3 +99,11 @@ func (c *Coordinator) OnPartitionChange(topic *mq_pb.Topic, assignments []*mq_pb
 		cg.OnPartitionListChange(assignments)
 	}
 }
+
+func (c *Coordinator) OnAddBroker(broker string, brokerStats *pub_balancer.BrokerStats) {
+
+}
+
+func (c *Coordinator) OnRemoveBroker(broker string, brokerStats *pub_balancer.BrokerStats) {
+
+}