svn merge -c 1589405 merging from trunk to branch-2.4 to fix:HADOOP-10527. Fix incorrect return code and allow more retries on EINTR.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1589408 13f79535-47bb-0310-9956-ffa450edef68