From d9dc0d777b775f2fe4f23f42e1b4130f4de1ed72 Mon Sep 17 00:00:00 2001
From: Daniel Shih <hotingwow@gmail.com>
Date: Tue, 12 Jan 2016 17:06:47 +0800
Subject: [PATCH] Fix a possible race condition of sdown detection if the
 connection to master/slave/sentinel decames disconnected just after the last
 PONG and before the next PING.

---
 src/sentinel.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/sentinel.c b/src/sentinel.c
index da0a400d..0d1eb78a 100644
--- a/src/sentinel.c
+++ b/src/sentinel.c
@@ -3387,6 +3387,8 @@ void sentinelCheckSubjectivelyDown(sentinelRedisInstance *ri) {
 
     if (ri->link->act_ping_time)
         elapsed = mstime() - ri->link->act_ping_time;
+    else if (ri->link->disconnected)
+        elapsed = mstime() - ri->link->last_avail_time;
 
     /* Check if we are in need for a reconnection of one of the
      * links, because we are detecting low activity.