diff --git a/internal/querynode/collection_replica.go b/internal/querynode/collection_replica.go
index 2f57f0faff..cc63239189 100644
--- a/internal/querynode/collection_replica.go
+++ b/internal/querynode/collection_replica.go
@@ -567,6 +567,7 @@ func (colReplica *collectionReplica) getExcludedSegments(collectionID UniqueID)
 	return colReplica.excludedSegments[collectionID], nil
 }
 
+// freeAll will free all meta info from collectionReplica
 func (colReplica *collectionReplica) freeAll() {
 	colReplica.mu.Lock()
 	defer colReplica.mu.Unlock()