multi: add debug logs to catch slow shutdown

htlcswitch/hop/iterator.go

@@ -139,7 +139,8 @@ func (p *OnionProcessor) Start() error {
 // Stop shutsdown the onion processor's sphinx router.
 func (p *OnionProcessor) Stop() error {
 
-	log.Info("Onion processor shutting down")
+	log.Info("Onion processor shutting down...")
+	defer log.Debug("Onion processor shutdown complete")
 
 	p.router.Stop()
 	return nil

htlcswitch/htlcnotifier.go

@@ -92,7 +92,9 @@ func (h *HtlcNotifier) Start() error {
 func (h *HtlcNotifier) Stop() error {
 	var err error
 	h.stopped.Do(func() {
-		log.Info("HtlcNotifier shutting down")
+		log.Info("HtlcNotifier shutting down...")
+		defer log.Debug("HtlcNotifier shutdown complete")
+
 		if err = h.ntfnServer.Stop(); err != nil {
 			log.Warnf("error stopping htlc notifier: %v", err)
 		}

htlcswitch/switch.go

@@ -2244,7 +2244,8 @@ func (s *Switch) Stop() error {
 		return errors.New("htlc switch already shutdown")
 	}
 
-	log.Info("HTLC Switch shutting down")
+	log.Info("HTLC Switch shutting down...")
+	defer log.Debug("HTLC Switch shutdown complete")
 
 	close(s.quit)