diff --git a/internal/distributed/querycoord/service.go b/internal/distributed/querycoord/service.go
index efd6fb03dcc49c882e0630ba0abd43a5581587a8..c5928ebf0c4154debd8c015eaf0a20a1fa9d4f79 100644
--- a/internal/distributed/querycoord/service.go
+++ b/internal/distributed/querycoord/service.go
@@ -94,6 +94,7 @@ func (s *Server) Run() error {
 	return nil
 }
 
+// init initializes QueryCoord's grpc service.
 func (s *Server) init() error {
 	Params.Init()