From b94bca01fccffb20b3abdb722a6564b29f749202 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Tue, 24 Jul 2012 18:46:04 +0200
Subject: [PATCH] Prevent a spurious +sdown event on switch.

When we reset the master we should start with clean timestamps for ping
replies otherwise we'll detect a spurious +sdown event, because on
+master-switch event the previous master instance was probably in +sdown
condition. Since we updated the address we should count time from
scratch again.

Also this commit makes sure to explicitly reset the count of pending
commands, now we can do this because of the new way the hiredis link
is closed.
---
 src/sentinel.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/sentinel.c b/src/sentinel.c
index 3acadf831..e89b343a9 100644
--- a/src/sentinel.c
+++ b/src/sentinel.c
@@ -765,6 +765,7 @@ void sentinelResetMaster(sentinelRedisInstance *ri, int flags) {
     ri->sentinels = dictCreate(&instancesDictType,NULL);
     if (ri->cc) sentinelKillLink(ri,ri->cc);
     if (ri->pc) sentinelKillLink(ri,ri->pc);
+    ri->pending_commands = 0;
     ri->flags &= SRI_MASTER|SRI_CAN_FAILOVER|SRI_DISCONNECTED;
     if (ri->leader) {
         sdsfree(ri->leader);
@@ -778,6 +779,8 @@ void sentinelResetMaster(sentinelRedisInstance *ri, int flags) {
     sdsfree(ri->slave_master_host);
     ri->runid = NULL;
     ri->slave_master_host = NULL;
+    ri->last_avail_time = mstime();
+    ri->last_pong_time = mstime();
     if (flags & SENTINEL_GENERATE_EVENT)
         sentinelEvent(REDIS_WARNING,"+reset-master",ri,"%@");
 }