HADOOP-8917. Merge 1450571 from trunk.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1450572 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-8917. Changed contributed by from Arpit Agarwal to Arpit Gupta.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1450576 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
Merge remote branch 'origin/branch-2-gd' into fb-YAHOO-252-branch-2-gd