From 1d0e33c6bcfd5b0ef4fe4a3c4a4a51441d0e1836 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Thu, 16 Jun 2016 19:24:34 +0200
Subject: [PATCH] Fix Sentinel pending commands counting.

This bug most experienced effect was an inability of Redis to
reconfigure back old masters to slaves after they are reachable again
after a failover. This was due to failing to reset the count of the
pending commands properly, so the master appeared fovever down.

Was introduced in Redis 3.2 new Sentinel connection sharing feature
which is a lot more complex than the 3.0 code, but more scalable.

Many thanks to people reporting the issue, and especially to
@sskorgal for investigating the issue in depth.

Hopefully closes #3285.
---
 src/sentinel.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/sentinel.c b/src/sentinel.c
index 6c48f3ed9..f8ebd0c6f 100644
--- a/src/sentinel.c
+++ b/src/sentinel.c
@@ -1910,6 +1910,7 @@ void sentinelReconnectInstance(sentinelRedisInstance *ri) {
                 link->cc->errstr);
             instanceLinkCloseConnection(link,link->cc);
         } else {
+            link->pending_commands = 0;
             link->cc_conn_time = mstime();
             link->cc->data = link;
             redisAeAttach(server.el,link->cc);