HDFS-6105. NN web UI for DN list loads the same jmx page multiple times. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1579468 13f79535-47bb-0310-9956-ffa450edef68
YARN-1640. Fixed manual failover of ResourceManagers to work correctly in secure clusters. Contributed by Xuan Gong.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1579510 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-2349. Modified FileInputFormat to be able to issue file and block location calls in parallel. Contributed by Siddharth Seth.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1579515 13f79535-47bb-0310-9956-ffa450edef68