diff --git a/internal/util/rocksmq/server/rocksmq/rocksmq_impl.go b/internal/util/rocksmq/server/rocksmq/rocksmq_impl.go
index 0408dc3d2d..875136f561 100644
--- a/internal/util/rocksmq/server/rocksmq/rocksmq_impl.go
+++ b/internal/util/rocksmq/server/rocksmq/rocksmq_impl.go
@@ -211,6 +211,7 @@ func (rmq *rocksmq) checkKeyExist(key string) bool {
 	return val != ""
 }
 
+// CreateTopic writes initialized messages for topic in rocksdb
 func (rmq *rocksmq) CreateTopic(topicName string) error {
 	start := time.Now()
 	beginKey := topicName + "/begin_id"