YARN-1027. Implement RMHAProtocolService (Karthik Kambatla via bikas)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1523750 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9935. Revert from trunk.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1523839 13f79535-47bb-0310-9956-ffa450edef68
YARN-1001. Added a web-service to get statistics about per application-type per state for consumption by downstream projects. Contributed by Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1523855 13f79535-47bb-0310-9956-ffa450edef68
YARN-1184. ClassCastException during preemption enforcement.



git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1523863 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5207. In BlockPlacementPolicy.chooseTarget(..), change the writer and the excludedNodes parameter types respectively to Node and Set.  Contributed by Junping Du


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1523875 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9944. Fix RpcRequestHeaderProto.callId to be sint32 rather than uint32 since ipc.Client.CONNECTION_CONTEXT_CALL_ID is signed (i.e. -3). Contributed by Arun C. Murthy.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1523885 13f79535-47bb-0310-9956-ffa450edef68
Preparing for hadoop-2.1.1-beta release.

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HADOOP-9350. Moving to appropriate section in CHANGES.txt

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Added ASL2 header to releasenotes.html.

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Merge remote-tracking branch: upstream/trunk