HDFS-6097. Zero-copy reads are incorrectly disabled on file offsets above 2GB (cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1577355 13f79535-47bb-0310-9956-ffa450edef68
YARN-1771. Reduce the number of NameNode operations during localization of
public resources using a cache. Contributed by Sangjin Lee



git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1577392 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-3679. Fixup assert ordering in unit tests to yield meaningful error
messages. Contributed by Jay Vyas


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1577397 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6084. Merge r1577401 from trunk.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1577402 13f79535-47bb-0310-9956-ffa450edef68
YARN-1658. Modified web-app framework to let standby RMs redirect web-service calls to the active RM. Contributed by Cindy Li.
svn merge --ignore-ancestry -c 1577408 ../../trunk/


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