diff --git a/internal/querynode/collection_replica.go b/internal/querynode/collection_replica.go
index fa40baca74..45492f70c4 100644
--- a/internal/querynode/collection_replica.go
+++ b/internal/querynode/collection_replica.go
@@ -120,6 +120,7 @@ type ReplicaInterface interface {
 	getSegmentsMemSize() int64
 	// freeAll will free all meta info from collectionReplica
 	freeAll()
+	// printReplica prints the collections, partitions and segments in the collectionReplica
 	printReplica()
 }