fix: master lose some volumes

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())
+}

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())
 	}