Merge -r 679577:679578 from trunk to branch-0.18 to fix HADOOP-3521

git-svn-id: https://svn.apache.org/repos/asf/hadoop/core/branches/branch-0.18@679579 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -768,6 +768,9 @@ Release 0.18.0 - Unreleased
     HADOOP-3645. MetricsTimeVaryingRate returns wrong value for
     metric_avg_time. (Lohit Vijayarenu via hairong)
 
+    HADOOP-3521. Reverted the missing cast to float for sending Counters' values
+    to Hadoop metrics which was removed by HADOOP-544. (acmurthy)   
+
 Release 0.17.2 - Unreleased
 
   BUG FIXES

src/mapred/org/apache/hadoop/mapred/JobInProgress.java

@@ -223,7 +223,7 @@ class JobInProgress {
       jobMetrics.setTag("group", group.getDisplayName());
       for (Counters.Counter counter : group) {
         jobMetrics.setTag("counter", counter.getDisplayName());
-        jobMetrics.setMetric("value", counter.getCounter());
+        jobMetrics.setMetric("value", (float) counter.getCounter());
         jobMetrics.update();
       }
     }