diff --git a/weed/topology/topology_vacuum.go b/weed/topology/topology_vacuum.go
index f9fbd3db0..5d62da428 100644
--- a/weed/topology/topology_vacuum.go
+++ b/weed/topology/topology_vacuum.go
@@ -139,7 +139,7 @@ func (t *Topology) batchVacuumVolumeCommit(grpcDialOption grpc.DialOption, vl *V
 		} else {
 			glog.V(0).Infof("Complete Committing vacuum %d on %s", vid, dn.Url())
 		}
-		// https://github.com/chrislusf/seaweedfs/issues/3369
+		// small space out for the same volume id https://github.com/chrislusf/seaweedfs/issues/3369
 		time.Sleep(3 * time.Second)
 	}
 	if isCommitSuccess {