Set version in branch-2.4 to 2.4.1-SNAPSHOT.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1583249 13f79535-47bb-0310-9956-ffa450edef68
Added release notes for hadoop-2.4.0.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1583255 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5285. svn rm hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeFileUnderConstruction.java & hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/INodeFileUnderConstructionWithSnapshot.java.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1583259 13f79535-47bb-0310-9956-ffa450edef68
YARN-1898. Made Standby RM links conf, stacks, logLevel, metrics, jmx, logs and static not be redirected to Active RM. Contributed by Xuan Gong.
svn merge --ignore-ancestry -c 1583833 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1583836 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1583842 from trunk for HADOOP-10455. When there is an exception, ipc.Server should first check whether it is an terse exception.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1583844 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5818. Added "hsadmin" command into mapred.cmd. Contributed by Jian He.
svn merge --ignore-ancestry -c 1584378 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1584382 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10456. Merging change r1584579 from branch-2 to branch-2.4

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svn merge -c 1584763 from trunk for HDFS-6189. Multiple HDFS tests fail on Windows attempting to use a test root path containing a colon.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1584766 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1584767 from trunk for the hadoop-common part of HDFS-6189.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1584772 13f79535-47bb-0310-9956-ffa450edef68
Merge r1584863 from branch-2. YARN-1837. Fixed TestMoveApplication#testMoveRejectedByScheduler failure. Contributed by Hong Zhiguo

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Merge -c 1584954 from trunk to branch-2.4 to fix YARN-1898. Addendum patch to ensure /jmx and /metrics are re-directed to Active RM.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1584956 13f79535-47bb-0310-9956-ffa450edef68
YARN-1905. Merging change r1585378 from branch-2 to branch-2.4

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1585379 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1585538 from trunk for HADOOP-10466. Lower the log level in UserGroupInformation.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1585540 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6197. Merging change r1585591 from branch-2 to branch-2.4

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1585592 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6198. Merging change r1585628 from branch-2 to branch-2.4

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1585630 13f79535-47bb-0310-9956-ffa450edef68
YARN-1908. Fixed DistributedShell to not fail in secure clusters. Contributed by Vinod Kumar Vavilapalli and Jian He.
svn merge --ignore-ancestry -c 1585849 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1585851 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6215. Wrong error message for upgrade. (Kihwal Lee via jeagles)

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svn merge -c 1586030 from trunk for HADOOP-10473. TestCallQueueManager should interrupt before counting calls.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1586032 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1586034 from trunk for HDFS-6206. Fix NullPointerException in DFSUtil.substituteForWildcardAddress.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1586038 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1586039 from trunk for HDFS-6204. Fix TestRBWBlockInvalidation: change the last sleep to a loop.


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