HDFS-5041. Add the time of last heartbeat to dead server Web UI. Contributed by Shinichi Yamashita

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1526368 13f79535-47bb-0310-9956-ffa450edef68
YARN-1157. Fixed ResourceManager UI to behave correctly when apps like distributed-shell do not set tracking urls. Contributed by Xuan Gong.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1526371 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5170. Fixed a wrong log message in CombineFileInputFormat class. Contributed by Sangjin Lee.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1526377 13f79535-47bb-0310-9956-ffa450edef68