diff --git a/internal/querynode/meta_replica.go b/internal/querynode/meta_replica.go
index cd1983ea3d..e8ceccd6c1 100644
--- a/internal/querynode/meta_replica.go
+++ b/internal/querynode/meta_replica.go
@@ -603,7 +603,7 @@ func (replica *metaReplica) removeSegmentPrivate(segmentID UniqueID, segType seg
 			deleteSegment(segment)
 		}
 	default:
-		panic("unsupported segment type")
+		panic(fmt.Sprintf("unsupported segment type %s", segType.String()))
 	}
 
 	metrics.QueryNodeNumSegments.WithLabelValues(fmt.Sprint(Params.QueryNodeCfg.GetNodeID())).Dec()
diff --git a/internal/querynode/partition.go b/internal/querynode/partition.go
index 627e348fa2..1ec631c5a9 100644
--- a/internal/querynode/partition.go
+++ b/internal/querynode/partition.go
@@ -97,7 +97,11 @@ func (p *Partition) removeSegmentID(segmentID UniqueID, segType segmentType) {
 	default:
 		return
 	}
-	log.Info("remove a segment from replica", zap.Int64("collectionID", p.collectionID), zap.Int64("partitionID", p.partitionID), zap.Int64("segmentID", segmentID))
+	log.Info("remove a segment from replica",
+		zap.Int64("collectionID", p.collectionID),
+		zap.Int64("partitionID", p.partitionID),
+		zap.Int64("segmentID", segmentID),
+		zap.String("segmentType", segType.String()))
 }
 
 // newPartition returns a new Partition
diff --git a/internal/querynode/segment.go b/internal/querynode/segment.go
index 81a0ff6c8c..8095a932a8 100644
--- a/internal/querynode/segment.go
+++ b/internal/querynode/segment.go
@@ -84,7 +84,7 @@ type Segment struct {
 	rmMutex          sync.RWMutex // guards recentlyModified
 	recentlyModified bool
 
-	typeMu      sync.Mutex // guards builtIndex
+	typeMu      sync.RWMutex // guards segmentType
 	segmentType segmentType
 
 	idBinlogRowSizes []int64
@@ -127,8 +127,8 @@ func (s *Segment) setType(segType segmentType) {
 }
 
 func (s *Segment) getType() segmentType {
-	s.typeMu.Lock()
-	defer s.typeMu.Unlock()
+	s.typeMu.RLock()
+	defer s.typeMu.RUnlock()
 	return s.segmentType
 }
 
@@ -178,7 +178,7 @@ func newSegment(collection *Collection, segmentID UniqueID, partitionID UniqueID
 			zap.Int64("collectionID", collectionID),
 			zap.Int64("partitionID", partitionID),
 			zap.Int64("segmentID", segmentID),
-			zap.Int32("segment type", int32(segType)),
+			zap.String("segmentType", segType.String()),
 			zap.Error(err))
 		return nil, err
 	}
@@ -187,7 +187,7 @@ func newSegment(collection *Collection, segmentID UniqueID, partitionID UniqueID
 		zap.Int64("collectionID", collectionID),
 		zap.Int64("partitionID", partitionID),
 		zap.Int64("segmentID", segmentID),
-		zap.Int32("segmentType", int32(segType)))
+		zap.String("segmentType", segType.String()))
 
 	var segment = &Segment{
 		segmentPtr:        segmentPtr,
@@ -217,7 +217,11 @@ func deleteSegment(segment *Segment) {
 	C.DeleteSegment(cPtr)
 	segment.segmentPtr = nil
 
-	log.Info("delete segment from memory", zap.Int64("collectionID", segment.collectionID), zap.Int64("partitionID", segment.partitionID), zap.Int64("segmentID", segment.ID()))
+	log.Info("delete segment from memory",
+		zap.Int64("collectionID", segment.collectionID),
+		zap.Int64("partitionID", segment.partitionID),
+		zap.Int64("segmentID", segment.ID()),
+		zap.String("segmentType", segment.getType().String()))
 }
 
 func (s *Segment) getRowCount() int64 {
@@ -758,7 +762,8 @@ func (s *Segment) segmentLoadDeletedRecord(primaryKeys []primaryKey, timestamps
 
 	log.Info("load deleted record done",
 		zap.Int64("row count", rowCount),
-		zap.Int64("segmentID", s.ID()))
+		zap.Int64("segmentID", s.ID()),
+		zap.String("segmentType", s.getType().String()))
 	return nil
 }
 
diff --git a/internal/querynode/segment_loader.go b/internal/querynode/segment_loader.go
index 7f52eb0f22..a0c23ab2eb 100644
--- a/internal/querynode/segment_loader.go
+++ b/internal/querynode/segment_loader.go
@@ -86,7 +86,7 @@ func (loader *segmentLoader) LoadSegment(req *querypb.LoadSegmentsRequest, segme
 	log.Info("segmentLoader start loading...",
 		zap.Any("collectionID", req.CollectionID),
 		zap.Any("segmentNum", segmentNum),
-		zap.Any("loadType", segmentType))
+		zap.Any("segmentType", segmentType.String()))
 
 	// check memory limit
 	concurrencyLevel := loader.cpuPool.Cap()
@@ -134,7 +134,7 @@ func (loader *segmentLoader) LoadSegment(req *querypb.LoadSegmentsRequest, segme
 				zap.Int64("collectionID", collectionID),
 				zap.Int64("partitionID", partitionID),
 				zap.Int64("segmentID", segmentID),
-				zap.Int32("segment type", int32(segmentType)),
+				zap.String("segmentType", segmentType.String()),
 				zap.Error(err))
 			segmentGC()
 			return err
@@ -157,7 +157,7 @@ func (loader *segmentLoader) LoadSegment(req *querypb.LoadSegmentsRequest, segme
 				zap.Int64("collectionID", collectionID),
 				zap.Int64("partitionID", partitionID),
 				zap.Int64("segmentID", segmentID),
-				zap.Int32("segment type", int32(segmentType)),
+				zap.String("segmentType", segmentType.String()),
 				zap.Error(err))
 			return err
 		}
@@ -206,7 +206,8 @@ func (loader *segmentLoader) loadSegmentInternal(segment *Segment,
 	log.Info("start loading segment data into memory",
 		zap.Int64("collectionID", collectionID),
 		zap.Int64("partitionID", partitionID),
-		zap.Int64("segmentID", segmentID))
+		zap.Int64("segmentID", segmentID),
+		zap.String("segmentType", segment.getType().String()))
 
 	pkFieldID, err := loader.metaReplica.getPKFieldIDByCollectionID(collectionID)
 	if err != nil {
@@ -310,7 +311,8 @@ func (loader *segmentLoader) loadGrowingSegmentFields(segment *Segment, fieldBin
 	log.Info("log field binlogs done",
 		zap.Int64("collection", segment.collectionID),
 		zap.Int64("segment", segment.segmentID),
-		zap.Any("field", fieldBinlogs))
+		zap.Any("field", fieldBinlogs),
+		zap.String("segmentType", segmentType.String()))
 
 	_, _, insertData, err := iCodec.Deserialize(blobs)
 	if err != nil {
@@ -337,7 +339,7 @@ func (loader *segmentLoader) loadGrowingSegmentFields(segment *Segment, fieldBin
 		return loader.loadGrowingSegments(segment, rowIDData.(*storage.Int64FieldData).Data, utss, insertData)
 
 	default:
-		err := fmt.Errorf("illegal segmentType=%v when load segment, collectionID=%v", segmentType, segment.collectionID)
+		err := fmt.Errorf("illegal segmentType=%s when load segment, collectionID=%v", segmentType.String(), segment.collectionID)
 		return err
 	}
 }
@@ -359,7 +361,8 @@ func (loader *segmentLoader) loadSealedSegmentFields(segment *Segment, fields []
 	log.Info("log field binlogs done",
 		zap.Int64("collection", segment.collectionID),
 		zap.Int64("segment", segment.segmentID),
-		zap.Any("fields", fields))
+		zap.Any("fields", fields),
+		zap.String("segmentType", segment.getType().String()))
 
 	return nil
 }