MAPREDUCE-5209. Fix units in a ShuffleScheduler log message.
Contributed by Tsuyoshi OZAWA


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1480472 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5157. Bring back old sampler related code so that we can support binary compatibility with hadoop-1 sorter example. Contributed by Zhijie Shen.
svn merge --ignore-ancestry -c 1480474 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1480476 13f79535-47bb-0310-9956-ffa450edef68
Fixing release date for 2.0.4-alpha.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1480482 13f79535-47bb-0310-9956-ffa450edef68
YARN-631. Changed ClientRMProtocol api to throw IOException and YarnRemoteException. Contributed by Xuan Gong.
MAPREDUCE-5212. Handling YarnRemoteException separately from IOException in MR App after YARN-631. Contributed by Xuan Gong.
svn merge --ignore-ancestry -c 1480494 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1480495 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