YARN-628. Fix the way YarnRemoteException is being unrolled to extract out the underlying exception. Contributed by Siddharth Seth.
svn merge --ignore-ancestry -c 1483207 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1483208 13f79535-47bb-0310-9956-ffa450edef68
HDFS-347. DFS read performance suboptimal when client co-located on nodes with data. Contributed by Colin Patrick McCabe.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1483209 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4661. A few little code cleanups of some HDFS-347-related code. Contributed by Colin Patrick McCabe.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1483210 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4698. Provide client-side metrics for remote reads, local reads, and short-circuit reads. Contributed by Colin Patrick McCabe.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1483211 13f79535-47bb-0310-9956-ffa450edef68
Add HDFS-347 and related JIRAs to CHANGES.txt under 2.0.5


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1483213 13f79535-47bb-0310-9956-ffa450edef68