diff --git a/core/reader/replicate_channel_manager.go b/core/reader/replicate_channel_manager.go
index 24003abd..7a258104 100644
--- a/core/reader/replicate_channel_manager.go
+++ b/core/reader/replicate_channel_manager.go
@@ -170,6 +170,11 @@ func (r *replicateChannelManager) StartReadCollection(ctx context.Context, info
 		r.addCollectionLock.Unlock()
 	}()
 
+	if r.isDroppedCollection(info.ID) {
+		log.Info("the collection is dropped", zap.Int64("collection_id", info.ID))
+		return nil
+	}
+
 	sourceDBInfo := r.metaOp.GetDatabaseInfoForCollection(ctx, info.ID)
 
 	var err error
@@ -362,7 +367,11 @@ func (r *replicateChannelManager) AddPartition(ctx context.Context, collectionIn
 	sourceDBInfo := r.metaOp.GetDatabaseInfoForCollection(ctx, collectionID)
 
 	if sourceDBInfo.Dropped {
-		partitionLog.Warn("the database has been dropped when add partition")
+		partitionLog.Info("the database has been dropped when add partition")
+		return nil
+	}
+	if r.isDroppedPartition(partitionInfo.PartitionID) {
+		partitionLog.Info("the partition has been dropped when add partition")
 		return nil
 	}
 
@@ -412,7 +421,7 @@ func (r *replicateChannelManager) AddPartition(ctx context.Context, collectionIn
 		if partitionInfo.State == pb.PartitionState_PartitionDropping ||
 			partitionInfo.State == pb.PartitionState_PartitionDropped {
 			r.droppedPartitions.Store(partitionInfo.PartitionID, struct{}{})
-			partitionLog.Warn("the partition is dropped in the source and target")
+			partitionLog.Info("the partition is dropped in the source and target")
 			return nil
 		}
 		select {
@@ -456,6 +465,11 @@ func (r *replicateChannelManager) AddPartition(ctx context.Context, collectionIn
 	if _, ok := r.replicatePartitions[collectionID]; !ok {
 		r.replicatePartitions[collectionID] = make(map[int64]chan struct{})
 	}
+	if _, ok := r.replicatePartitions[collectionID][partitionInfo.PartitionID]; ok {
+		partitionLog.Info("the partition is already replicated", zap.Int64("partition_id", partitionInfo.PartitionID))
+		r.partitionLock.Unlock()
+		return nil
+	}
 	r.replicatePartitions[collectionID][partitionInfo.PartitionID] = barrier.CloseChan
 	r.partitionLock.Unlock()
 	for _, handler := range handlers {