Merge -r 730109:730110 from trunk onto 0.20 branch. Fixes HADOOP-4956.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/core/branches/branch-0.20@730113 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -497,6 +497,9 @@ Release 0.20.0 - Unreleased
 
     HADOOP-4896. HDFS Fsck does not load HDFS configuration. (Raghu Angadi)
 
+    HADOOP-4956. Creates TaskStatus for failed tasks with an empty Counters 
+    object instead of null. (ddas)
+
 Release 0.19.1 - Unreleased
 
   IMPROVEMENTS

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

@@ -2340,7 +2340,7 @@ class JobInProgress {
                                                     reason,
                                                     reason,
                                                     trackerName, phase,
-                                                    null);
+                                                    new Counters());
     status.setFinishTime(System.currentTimeMillis());
     updateTaskStatus(tip, status, metrics);
     JobHistory.Task.logFailed(tip.getTIPId(),