From 7109d6d635709d56a659ba7ce68fcbb9b8a3c42f Mon Sep 17 00:00:00 2001
From: Kevin Wan <wanjunfeng@gmail.com>
Date: Sun, 24 Oct 2021 12:01:17 +0800
Subject: [PATCH] chore: reverse the order of stopping services (#1159)

* chore: reverse the order of stopping services

* chore: reverse the order of stopping services
---
 core/service/servicegroup.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/core/service/servicegroup.go b/core/service/servicegroup.go
index 4585bf08..984a0eff 100644
--- a/core/service/servicegroup.go
+++ b/core/service/servicegroup.go
@@ -26,6 +26,7 @@ type (
 	}
 
 	// A ServiceGroup is a group of services.
+	// Attention: the starting order of the added services is not guaranteed.
 	ServiceGroup struct {
 		services []Service
 		stopOnce func()
@@ -41,7 +42,8 @@ func NewServiceGroup() *ServiceGroup {
 
 // Add adds service into sg.
 func (sg *ServiceGroup) Add(service Service) {
-	sg.services = append(sg.services, service)
+	// push front, stop with reverse order.
+	sg.services = append([]Service{service}, sg.services...)
 }
 
 // Start starts the ServiceGroup.