HADOOP-10562: Merging r1591782 from trunk to branch-2.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1591783 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10562. Undo previous commit.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1591784 13f79535-47bb-0310-9956-ffa450edef68