avoid dead lock

weed/topology/data_center.go

@@ -29,7 +29,7 @@ func (dc *DataCenter) GetOrCreateRack(rackName string) *Rack {
 		}
 	}
 	rack := NewRack(rackName)
-	dc.LinkChildNode(rack)
+	dc.doLinkChildNode(rack)
 	return rack
 }
 

weed/topology/rack.go

@@ -47,7 +47,7 @@ func (r *Rack) GetOrCreateDataNode(ip string, port int, grpcPort int, publicUrl
 	dn.GrpcPort = grpcPort
 	dn.PublicUrl = publicUrl
 	dn.LastSeen = time.Now().Unix()
-	r.LinkChildNode(dn)
+	r.doLinkChildNode(dn)
 	for diskType, maxVolumeCount := range maxVolumeCounts {
 		disk := NewDisk(diskType)
 		disk.diskUsages.getOrCreateDisk(types.ToDiskType(diskType)).maxVolumeCount = int64(maxVolumeCount)

weed/topology/topology.go

@@ -267,7 +267,7 @@ func (t *Topology) GetOrCreateDataCenter(dcName string) *DataCenter {
 		}
 	}
 	dc := NewDataCenter(dcName)
-	t.LinkChildNode(dc)
+	t.doLinkChildNode(dc)
 	return dc
 }