HDFS-4592. Default values for access time precision are out of sync between hdfs-default.xml and the code. Contributed by Aaron T. Myers.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1455778 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4522. LightWeightGSet expects incrementing a volatile to be atomic. Contributed by Colin Patrick McCabe.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1455781 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4484. libwebhdfs compilation broken with gcc 4.6.2. Contributed by Colin Patrick McCabe.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1455783 13f79535-47bb-0310-9956-ffa450edef68
YARN-198. Added a link to RM pages from the NodeManager web app. Contributed by Jian He.
svn merge --ignore-ancestry -c 1455800 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1455802 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
Merge remote branch 'origin/branch-2-gd' into fb-MAPREDUCE-4884-branch-2-gd