svn merge -c 1443027. FIXES: MAPREDUCE-4905. test org.apache.hadoop.mapred.pipes (Aleksey Gorshkov via bobby)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1443036 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9278. Fix the file handle leak in HarMetaData.parseMetaData() in HarFileSystem. (Chris Nauroth via tgraves)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1443042 13f79535-47bb-0310-9956-ffa450edef68
YARN-357. App submission should not be synchronized (daryn)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1443048 13f79535-47bb-0310-9956-ffa450edef68