MAPREDUCE-5157. Bring back old sampler related code so that we can support binary compatibility with hadoop-1 sorter example. Contributed by Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1480474 13f79535-47bb-0310-9956-ffa450edef68
Fixing release date for 2.0.4-alpha.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1480480 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.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1480494 13f79535-47bb-0310-9956-ffa450edef68