Merge 1550570 from trunk to branch-2 for HADOOP-8753. LocalDirAllocator throws ArithmeticException: divide by zero when there is no available space on configured local dir. Contributed by Benoy Antony.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1550571 13f79535-47bb-0310-9956-ffa450edef68
Merge r1550579 from trunk to branch-2 to fix YARN-1311. Fixed app specific scheduler-events' names to be app-attempt based. Contributed by Vinod Kumar Vavilapalli

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1550584 13f79535-47bb-0310-9956-ffa450edef68
Merge r1550594 from trunk to branch-2 to revert YARN-1311. Fixed app specific scheduler-events' names to be app-attempt based. Contributed by Vinod Kumar Vavilapalli

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1550596 13f79535-47bb-0310-9956-ffa450edef68
Merge r1550613 and r1550615 from trunk to branch-2 to fix YARN-1311. Fixed app specific scheduler-events' names to be app-attempt based. Contributed by Vinod Kumar Vavilapalli

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1550618 13f79535-47bb-0310-9956-ffa450edef68
Merge 1550620 from trunk: HDFS-5652. Refactor invalid block token exception handling in DFSInputStream. (Liang Xie via junping_du)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1550623 13f79535-47bb-0310-9956-ffa450edef68