From fda4cba912dd8483bd4a991555e179ca5fcce8a2 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Fri, 20 Dec 2013 12:47:13 +0100
Subject: [PATCH] Redis Cluster: reconfigure replication when master changes
 address.

---
 src/cluster.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/cluster.c b/src/cluster.c
index 019678d7..85638d78 100644
--- a/src/cluster.c
+++ b/src/cluster.c
@@ -986,6 +986,14 @@ int nodeUpdateAddressIfNeeded(clusterNode *node, clusterLink *link, int port) {
     if (node->link) freeClusterLink(node->link);
     redisLog(REDIS_WARNING,"Address updated for node %.40s, now %s:%d",
         node->name, node->ip, node->port);
+
+    /* Check if this is our master and we have to change the
+     * replication target as well. */
+    if (server.cluster->myself->flags & REDIS_NODE_SLAVE &&
+        server.cluster->myself->slaveof == node)
+    {
+        replicationSetMaster(node->ip, node->port);
+    }
     return 1;
 }