if err != nil {
				log.Infof("app connection is not closed: %v", err)
			}
		}
		if envoyCancel != nil {
			envoyCancel()
		}
		if appCancel != nil {
			appCancel()
		}
	}()

	// Gather all the metrics we will merge
	if !s.config.NoEnvoy {
		if envoy, envoyCancel, _, err = s.scrape(fmt.Sprintf("http://localhost:%d/stats/prometheus", s.envoyStatsPort), r.Header); err != nil {