diff --git a/bookkeeper-server/src/main/java/org/apache/bookkeeper/client/RackawareEnsemblePlacementPolicy.java b/bookkeeper-server/src/main/java/org/apache/bookkeeper/client/RackawareEnsemblePlacementPolicy.java
index 1fb17ca3ef1..e26988a4e67 100644
--- a/bookkeeper-server/src/main/java/org/apache/bookkeeper/client/RackawareEnsemblePlacementPolicy.java
+++ b/bookkeeper-server/src/main/java/org/apache/bookkeeper/client/RackawareEnsemblePlacementPolicy.java
@@ -17,6 +17,7 @@
  */
 package org.apache.bookkeeper.client;
 
+import com.google.common.collect.Sets;
 import io.netty.util.HashedWheelTimer;
 import java.util.List;
 import java.util.Map;
@@ -110,7 +111,8 @@ public Set<BookieId> onClusterChanged(Set<BookieId> writableBookies,
             Set<BookieId> readOnlyBookies) {
         Set<BookieId> deadBookies = super.onClusterChanged(writableBookies, readOnlyBookies);
         if (null != slave) {
-            deadBookies = slave.onClusterChanged(writableBookies, readOnlyBookies);
+            deadBookies = Sets.union(deadBookies,
+                    slave.onClusterChanged(writableBookies, readOnlyBookies));
         }
         return deadBookies;
     }
diff --git a/bookkeeper-server/src/test/java/org/apache/bookkeeper/client/TestRackawareEnsemblePlacementPolicy.java b/bookkeeper-server/src/test/java/org/apache/bookkeeper/client/TestRackawareEnsemblePlacementPolicy.java
index cd76cdd1c64..4abe80ea7b7 100644
--- a/bookkeeper-server/src/test/java/org/apache/bookkeeper/client/TestRackawareEnsemblePlacementPolicy.java
+++ b/bookkeeper-server/src/test/java/org/apache/bookkeeper/client/TestRackawareEnsemblePlacementPolicy.java
@@ -2481,7 +2481,7 @@ public void testPlacementOnStabilizeNetworkTopology() throws Exception {
         // addr4 left
         addrs.remove(addr4.toBookieId());
         Set<BookieId> deadBookies = repp.onClusterChanged(addrs, new HashSet<BookieId>());
-        assertTrue(deadBookies.isEmpty());
+        assertTrue(deadBookies.contains(addr4.toBookieId()));
 
         // we will never use addr4 even it is in the stabilized network topology
         for (int i = 0; i < 5; i++) {