merge YARN-737 from trunk. Throw some specific exceptions directly instead of wrapping them in YarnException. Contributed by Jian He.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1491897 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1491914 FIXES: MAPREDUCE-5315.  DistCp reports success even on failure. (mithun and jlowe via daryn)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1491918 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9635. Fix potential stack overflow in DomainSocket.c (V. Karthik Kumar via cmccabe)



git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1491943 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9532. Merging change r1478072 from trunk to branch-2

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1491953 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9625. Merging change r1491907 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1491959 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4873. Merging change r1491957 from trunk to branch-2.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1491964 13f79535-47bb-0310-9956-ffa450edef68