From 541253da7499ea7f3e4c7e98942c00a492e2c5e2 Mon Sep 17 00:00:00 2001
From: Ted Yu <yuzhihong@gmail.com>
Date: Mon, 26 Aug 2019 07:46:26 -0700
Subject: [PATCH] Utilize reflectorMutex in LastSyncResourceVersion

Kubernetes-commit: 4f54538ae8ff7a4e6829bea1479194af87b7833c
---
 tools/cache/controller.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/cache/controller.go b/tools/cache/controller.go
index 73e7f8d7..27a1c52c 100644
--- a/tools/cache/controller.go
+++ b/tools/cache/controller.go
@@ -131,6 +131,8 @@ func (c *controller) HasSynced() bool {
 }
 
 func (c *controller) LastSyncResourceVersion() string {
+	c.reflectorMutex.RLock()
+	defer c.reflectorMutex.RUnlock()
 	if c.reflector == nil {
 		return ""
 	}