From 59ad6ac5feac4f6760144861b723a51383a0f19b Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Wed, 21 Jan 2015 15:55:53 +0100
Subject: [PATCH] Cluster: set the slaves->slaveof filed to NULL when master is
 freed.

Related to issue #2289.
---
 src/cluster.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/cluster.c b/src/cluster.c
index ec6901e8..5135cdaa 100644
--- a/src/cluster.c
+++ b/src/cluster.c
@@ -821,6 +821,14 @@ int clusterCountNonFailingSlaves(clusterNode *n) {
 
 void freeClusterNode(clusterNode *n) {
     sds nodename;
+    int j;
+
+    /* If the node is a master with associated slaves, we have to set
+     * all the slaves->slaveof fields to NULL (unknown). */
+    if (nodeIsMaster(n)) {
+        for (j = 0; j < n->numslaves; j++)
+            n->slaves[j]->slaveof = NULL;
+    }
 
     nodename = sdsnewlen(n->name, REDIS_CLUSTER_NAMELEN);
     redisAssert(dictDelete(server.cluster->nodes,nodename) == DICT_OK);