HDFS-6304. Consolidate the logic of path resolution in FSDirectory. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1591411 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6289. HA failover can fail if there are pending DN messages for DNs which no longer exist. Contributed by Aaron T. Myers.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1591413 13f79535-47bb-0310-9956-ffa450edef68
YARN-1696. Added documentation for ResourceManager fail-over. Contributed by Karthik Kambatla, Masatake Iwasaki, Tsuyoshi OZAWA.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1591416 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6252. Phase out the old web UI in HDFS. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1591732 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10562. Namenode exits on exception without printing stack trace in AbstractDelegationTokenSecretManager. (Contributed by Suresh Srinivas)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1591782 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10562. Undo previous commit.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1591785 13f79535-47bb-0310-9956-ffa450edef68