diff --git a/internal/distributed/datacoord/service.go b/internal/distributed/datacoord/service.go
index b58448c38b037a7c90ad1c1c523be134c0c0132b..c67c0d4f78daa67c770bc3b603e5382019f6f2c3 100644
--- a/internal/distributed/datacoord/service.go
+++ b/internal/distributed/datacoord/service.go
@@ -177,6 +177,7 @@ func (s *Server) Run() error {
 	return nil
 }
 
+// GetComponentStates gets states of datacoord and datanodes
 func (s *Server) GetComponentStates(ctx context.Context, req *internalpb.GetComponentStatesRequest) (*internalpb.ComponentStates, error) {
 	return s.dataCoord.GetComponentStates(ctx)
 }