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https://issues.apache.org/jira/browse/MAPREDUCE-5699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13892751#comment-13892751
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Karthik Kambatla commented on MAPREDUCE-5699:
---------------------------------------------

bq. should we make the running MRAppMaster/Job remember the tags as well. One 
of reason is that we need to parse them to JHS as the requirement of 
MAPREDUCE-5658.
The jobconf should have mapreduce.job.tags - the JHS should be able read it 
from jobconf.

bq. Another thing I'm considering is whether we'd like to support more features 
that are made possible by tags. For example, JobClient can also filter 
applications by tags. Thoughts?
It is a good idea to support in JobClient. I can add an API to JobClient to 
look for active/running MR jobs with a particular tag. For finished jobs, we 
should probably do it after JHS-related changes? 

> Tagging support for MR jobs
> ---------------------------
>
>                 Key: MAPREDUCE-5699
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5699
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: applicationmaster
>    Affects Versions: 2.3.0
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>         Attachments: mr-5699-1.patch, mr-5699-1.patch, mr-5699-2.patch
>
>
> YARN-1399 / YARN-1461 add support for tagging YARN applications. MR should 
> expose to users, so they can set tags on an MR job. 



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