YARN-2317. Updated the document about how to write YARN applications. Contributed by Li Lu.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1617594 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6830. BlockInfo.addStorage fails when DN changes the storage for a block replica. (Arpit Agarwal)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1617598 13f79535-47bb-0310-9956-ffa450edef68
YARN-2399. FairScheduler: Merge AppSchedulable and FSSchedulerApp into FSAppAttempt. (kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1617600 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6836. HDFS INFO logging is verbose & uses file appenders. (Contributed by Xiaoyu Yao)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1617603 13f79535-47bb-0310-9956-ffa450edef68