From 5b2082ead3489523c336e3047550bad5cad25d98 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Mon, 10 Feb 2014 17:08:37 +0100
Subject: [PATCH] Cluster: replica migration should only work for masters
 serving slots.

---
 src/cluster.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/cluster.c b/src/cluster.c
index d59b6342..167468dc 100644
--- a/src/cluster.c
+++ b/src/cluster.c
@@ -2264,7 +2264,7 @@ void clusterHandleSlaveMigration(int max_slaves) {
         if (nodeIsSlave(node) || nodeFailed(node)) continue;
         okslaves = clusterCountNonFailingSlaves(node);
 
-        if (okslaves == 0 && target == NULL) target = node;
+        if (okslaves == 0 && target == NULL && node->numslots > 0) target = node;
         if (okslaves == max_slaves) {
             for (j = 0; j < node->numslaves; j++) {
                 if (memcmp(node->slaves[j]->name,
@@ -2487,7 +2487,7 @@ void clusterCron(void) {
         if (nodeIsSlave(myself) && nodeIsMaster(node) && !nodeFailed(node)) {
             int okslaves = clusterCountNonFailingSlaves(node);
 
-            if (okslaves == 0) orphaned_masters++;
+            if (okslaves == 0 && node->numslots > 0) orphaned_masters++;
             if (okslaves > max_slaves) max_slaves = okslaves;
             if (nodeIsSlave(myself) && myself->slaveof == node)
                 this_slaves = okslaves;