From 2c5825d897727d95d62ea1465792bb5a7a09db96 Mon Sep 17 00:00:00 2001
From: Jimmy Xiang <jxiang@cloudera.com>
Date: Fri, 15 Aug 2014 10:36:49 -0700
Subject: [PATCH] HBASE-11740 RegionStates.getRegionAssignments() gets stuck on
 clone (Virag Kothari)

---
 .../java/org/apache/hadoop/hbase/master/RegionStates.java     | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionStates.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionStates.java
index 36bc8e28ba1..a29d675e287 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionStates.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionStates.java
@@ -20,6 +20,7 @@ package org.apache.hadoop.hbase.master;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
@@ -144,9 +145,8 @@ public class RegionStates {
   /**
    * @return an unmodifiable the region assignment map
    */
-  @SuppressWarnings("unchecked")
   public synchronized Map<HRegionInfo, ServerName> getRegionAssignments() {
-    return (Map<HRegionInfo, ServerName>)regionAssignments.clone();
+    return Collections.unmodifiableMap(regionAssignments);
   }
 
   /**