diff --git a/internal/distributed/rootcoord/service.go b/internal/distributed/rootcoord/service.go
index 0fa8f6e2f638fb83aa82f720c34dda72a6c50b6a..342685d44e40db4ed406d7608020da8a63566d4d 100644
--- a/internal/distributed/rootcoord/service.go
+++ b/internal/distributed/rootcoord/service.go
@@ -285,6 +285,7 @@ func (s *Server) Stop() error {
 	return nil
 }
 
+// GetComponentStates gets the component states of RootCoord.
 func (s *Server) GetComponentStates(ctx context.Context, req *internalpb.GetComponentStatesRequest) (*internalpb.ComponentStates, error) {
 	return s.rootCoord.GetComponentStates(ctx)
 }