From c9221fd187f9dee1b0a4d7f8345e7678dc7edde8 Mon Sep 17 00:00:00 2001
From: Andy Xie <andy.xning@gmail.com>
Date: Fri, 5 Jul 2019 18:18:52 +0800
Subject: [PATCH] check for monitor server start error

---
 server/server.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/server/server.go b/server/server.go
index 6652bdb7..36cd6091 100644
--- a/server/server.go
+++ b/server/server.go
@@ -1471,7 +1471,14 @@ func (s *Server) startMonitoring(secure bool) error {
 	s.mu.Unlock()
 
 	go func() {
-		srv.Serve(httpListener)
+		if err := srv.Serve(httpListener); err != nil {
+			s.mu.Lock()
+			shutdown := s.shutdown
+			s.mu.Unlock()
+			if !shutdown {
+				s.Fatalf("Error starting monitor on %q: %v", hp, err)
+			}
+		}
 		srv.Handler = nil
 		s.mu.Lock()
 		s.httpHandler = nil