Reverted HADOOP-10474 from branch-2.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1596048 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10612. Merging change r1596075 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1596080 13f79535-47bb-0310-9956-ffa450edef68