diff --git a/weed/server/master_grpc_server.go b/weed/server/master_grpc_server.go
index 1ad8edf91..83abdaaad 100644
--- a/weed/server/master_grpc_server.go
+++ b/weed/server/master_grpc_server.go
@@ -113,6 +113,9 @@ func (ms *MasterServer) SendHeartbeat(stream master_pb.Seaweed_SendHeartbeatServ
 		}
 
 		if len(heartbeat.Volumes) > 0 || heartbeat.HasNoVolumes {
+			dcName, rackName := ms.Topo.Configuration.Locate(heartbeat.Ip, heartbeat.DataCenter, heartbeat.Rack)
+			ms.Topo.DataNodeRegistration(dcName, rackName, dn)
+
 			// process heartbeat.Volumes
 			stats.MasterReceivedHeartbeatCounter.WithLabelValues("Volumes").Inc()
 			newVolumes, deletedVolumes := ms.Topo.SyncDataNodeRegistration(heartbeat.Volumes, dn)
diff --git a/weed/topology/topology.go b/weed/topology/topology.go
index 207c89ad7..3efcb3c1c 100644
--- a/weed/topology/topology.go
+++ b/weed/topology/topology.go
@@ -283,3 +283,14 @@ func (t *Topology) IncrementalSyncDataNodeRegistration(newVolumes, deletedVolume
 
 	return
 }
+
+func (t *Topology) DataNodeRegistration(dcName, rackName string ,dn *DataNode){
+	if dn.Parent() != nil{
+		return
+	}
+	// registration to topo
+	dc := t.GetOrCreateDataCenter(dcName)
+	rack := dc.GetOrCreateRack(rackName)
+	rack.LinkChildNode(dn)
+	glog.Infof("[%s] reLink To topo  ", dn.Id())
+}
\ No newline at end of file
diff --git a/weed/topology/topology_event_handling.go b/weed/topology/topology_event_handling.go
index 0f1db74df..99acefaf5 100644
--- a/weed/topology/topology_event_handling.go
+++ b/weed/topology/topology_event_handling.go
@@ -1,6 +1,7 @@
 package topology
 
 import (
+	"github.com/chrislusf/seaweedfs/weed/storage/erasure_coding"
 	"github.com/chrislusf/seaweedfs/weed/storage/types"
 	"google.golang.org/grpc"
 	"math/rand"
@@ -84,7 +85,8 @@ func (t *Topology) UnRegisterDataNode(dn *DataNode) {
 
 	negativeUsages := dn.GetDiskUsages().negative()
 	dn.UpAdjustDiskUsageDelta(negativeUsages)
-
+	dn.DeltaUpdateVolumes([]storage.VolumeInfo{}, dn.GetVolumes())
+	dn.DeltaUpdateEcShards([]*erasure_coding.EcVolumeInfo{}, dn.GetEcShards())
 	if dn.Parent() != nil {
 		dn.Parent().UnlinkChildNode(dn.Id())
 	}