YARN-629. Make YarnRemoteException not be rooted at IOException. Contributed by Xuan Gong.
MAPREDUCE-5204. Handling YarnRemoteException separately from IOException in MR app after YARN-629. Contributed by Xuan Gong.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1479680 13f79535-47bb-0310-9956-ffa450edef68
YARN-633. Changed RMAdminProtocol api to throw IOException and YarnRemoteException. Contributed by Xuan Gong.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1479738 13f79535-47bb-0310-9956-ffa450edef68
YARN-632. Changed ContainerManager api to throw IOException and YarnRemoteException. Contributed by Xuan Gong.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1479740 13f79535-47bb-0310-9956-ffa450edef68
YARN-45. Add protocol for schedulers to request containers back from
ApplicationMasters. Contributed by Carlo Curino and Chris Douglas.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1479771 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'apache/trunk' into YARN-422
Handle IOException as well, add container state, enable optional clean
all running containers.