MAPREDUCE-7062. Update mapreduce.job.tags description for making use for ATSv2 
purpose. Contributed by Charan Hebri.

(cherry picked from commit 6cc59a09e7330dc893b386d84c8f2aa86c02eace)


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/7cca3486
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/7cca3486
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/7cca3486

Branch: refs/heads/branch-3.0
Commit: 7cca3486b7189fadb187b4706f482d868ada8d52
Parents: ec258b8
Author: Rohith Sharma K S <rohithsharm...@apache.org>
Authored: Wed Apr 11 09:45:39 2018 +0530
Committer: Rohith Sharma K S <rohithsharm...@apache.org>
Committed: Wed Apr 11 09:49:38 2018 +0530

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 .../src/main/resources/mapred-default.xml                      | 6 ++++++
 1 file changed, 6 insertions(+)
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http://git-wip-us.apache.org/repos/asf/hadoop/blob/7cca3486/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml
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diff --git 
a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml
 
b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml
index db36e91..16ecd90 100644
--- 
a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml
+++ 
b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml
@@ -1023,6 +1023,12 @@
     <value></value>
     <description> Tags for the job that will be passed to YARN at submission
       time. Queries to YARN for applications can filter on these tags.
+      If these tags are intended to be used with The YARN Timeline Service v.2,
+      prefix them with the appropriate tag names for flow name, flow version 
and
+      flow run id. Example:
+      timeline_flow_name_tag:foo,
+      timeline_flow_version_tag:3df8b0d6100530080d2e0decf9e528e57c42a90a,
+      timeline_flow_run_id_tag:1465246348599
     </description>
   </property>
 


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