HDFS-2491. TestBalancer can fail when datanode utilization and avgUtilization is exactly same. Contributed by Uma Maheswara Rao G.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1187837 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -1762,6 +1762,9 @@ Release 0.22.0 - Unreleased
     HDFS-2012. Balancer incorrectly treats nodes whose utilization equals
     avgUtilization. (Uma Maheswara Rao G via shv)
 
+    HDFS-2491. TestBalancer can fail when datanode utilization and 
+    avgUtilization is exactly same. (Uma Maheswara Rao G via shv)
+
 Release 0.21.1 - Unreleased
 
     HDFS-1466. TestFcHdfsSymlink relies on /tmp/test not existing. (eli)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java

@@ -823,7 +823,7 @@ public class Balancer {
       cluster.add(datanode);
       BalancerDatanode datanodeS;
       final double avg = policy.getAvgUtilization();
-      if (policy.getUtilization(datanode) > avg) {
+      if (policy.getUtilization(datanode) >= avg) {
         datanodeS = new Source(datanode, policy, threshold);
         if (isAboveAvgUtilized(datanodeS)) {
           this.aboveAvgUtilizedDatanodes.add((Source)datanodeS);