MAPREDUCE-3829. [Gridmix] Gridmix should give better error message when input data directory already exists and -generate opton is erate opton is
+    given.(ravi

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461233 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-2722. [Gridmix] Gridmix simulated job's map's hdfsBytesRead counter is wrong when compressed input is used.(ravigummadi via tgraves)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461236 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-3953. [Gridmix] Gridmix throws NPE and does not simulate a job if the trace contains null taskStatus for a task.  (ravigummadi via tgraves)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461242 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-4087. [Gridmix] GenerateDistCacheData job of Gridmix can become slow in some cases (ravigummadi via tgraves).

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461243 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5077. Remove mapreduce.util.ResourceCalculatorPlugin and related code. Contributed by Karthik Kambatla.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461254 13f79535-47bb-0310-9956-ffa450edef68
merge YARN-440 from trunk. Flatten RegisterNodeManagerResponse. Contributed by Xuan Gong.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461257 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-3008. Improvements to cumulative CPU emulation for short running tasks in Gridmix. (amarrk via tgraves)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461269 13f79535-47bb-0310-9956-ffa450edef68
HDFS-9430. Merge change 1461268 from trunk.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461271 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-4083. [Gridmix] NPE in cpu emulation. (amarrk via tgraves)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461272 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-4100. [Gridmix] Bug fixed in compression emulation feature for map only jobs. (amarrk via tgraves)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461275 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-4356. [Rumen] Provide access to the method ParsedTask.obtainTaskAttempts(). (ravigummadi via tgraves)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461277 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-4149. [Rumen] Rumen fails to parse certain counter strings. (ravigummadi via tgraves) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461289 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd