fix datanode dropcollection error (#5690)

Signed-off-by: Nyangxuan <xuan.yang@zilliz.com>

internal/datanode/data_node.go

@@ -184,6 +184,7 @@ func (node *DataNode) BackGroundGC(collIDCh <-chan UniqueID) {
 				node.ReleaseDataSyncService(vchanName)
 			}
 		case <-node.ctx.Done():
+			log.Info("DataNode ctx done")
 			return
 		}
 	}

internal/datanode/data_sync_service.go

@@ -61,6 +61,7 @@ func newDataSyncService(ctx context.Context,
 		msFactory:    factory,
 		collectionID: vchan.GetCollectionID(),
 		dataService:  dataService,
+		clearSignal:  clearSignal,
 	}
 
 	service.initNodes(vchan)
@@ -71,7 +72,6 @@ func (dsService *dataSyncService) start() {
 	if dsService.fg != nil {
 		log.Debug("Data Sync Service starting flowgraph")
 		dsService.fg.Start()
-		log.Debug("Data Sync Service starting flowgraph Done")
 	} else {
 		log.Debug("Data Sync Service flowgraph nil")
 	}

internal/datanode/flow_graph_dd_node.go

@@ -76,8 +76,8 @@ func (ddn *ddNode) Operate(in []flowgraph.Msg) []flowgraph.Msg {
 		switch msg.Type() {
 		case commonpb.MsgType_DropCollection:
 			if msg.(*msgstream.DropCollectionMsg).GetCollectionID() == ddn.collectionID {
+				log.Info("Destroying current flowgraph", zap.Any("collectionID", ddn.collectionID))
 				ddn.clearSignal <- ddn.collectionID
-				log.Info("Destroying current flowgraph")
 			}
 		case commonpb.MsgType_Insert:
 			log.Debug("DDNode with insert messages")

internal/datanode/flow_graph_insert_buffer_node.go

@@ -760,6 +760,12 @@ func (ibNode *insertBufferNode) updateSegStatistics(segIDs []UniqueID) error {
 			log.Error("get segment statistics updates wrong", zap.Int64("segmentID", segID), zap.Error(err))
 			continue
 		}
+
+		log.Debug("Segment Statistics to Update",
+			zap.Int64("Segment ID", updates.GetSegmentID()),
+			zap.Int64("NumOfRows", updates.GetNumRows()),
+		)
+
 		statsUpdates = append(statsUpdates, updates)
 	}
 

internal/dataservice/server.go

@@ -269,6 +269,7 @@ func (s *Server) startStatsChannel(ctx context.Context) {
 					zap.Stringer("msgType", msg.Type()))
 				continue
 			}
+			log.Debug("Receive DataNode segment statistics update")
 			ssMsg := msg.(*msgstream.SegmentStatisticsMsg)
 			for _, stat := range ssMsg.SegStats {
 				s.segmentManager.UpdateSegmentStats(stat)