From a0d41e51c24bd2299d3e46a2164fc5408de220dc Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Fri, 27 Nov 2015 08:59:17 +0100
Subject: [PATCH] Redis Cluster: hint about validity factor when slave can't
 failover.

---
 src/cluster.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/cluster.c b/src/cluster.c
index 17e86a6c..cf0c1bd3 100644
--- a/src/cluster.c
+++ b/src/cluster.c
@@ -2625,7 +2625,9 @@ void clusterLogCantFailover(int reason) {
 
     switch(reason) {
     case CLUSTER_CANT_FAILOVER_DATA_AGE:
-        msg = "Disconnected from master for longer than allowed.";
+        msg = "Disconnected from master for longer than allowed. "
+              "Please check the 'cluster-slave-validity-factor' configuration "
+              "option.";
         break;
     case CLUSTER_CANT_FAILOVER_WAITING_DELAY:
         msg = "Waiting the delay before I can start a new failover.";