Rohith Sharma K S updated MAPREDUCE-7062:
    Summary: Update mapreduce.job.tags description for making use for ATSv2 
purpose.  (was: MR job tags not compatible with YARN ATSv2 flow names, flow run 
ids and flow versions)

> Update mapreduce.job.tags description for making use for ATSv2 purpose.
> -----------------------------------------------------------------------
>                 Key: MAPREDUCE-7062
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7062
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Charan Hebri
>            Assignee: Charan Hebri
>            Priority: Major
>         Attachments: MAPREDUCE-7062.001.patch
> When applications are submitted to YARN, tags are generated in the format 
> However, MR applications don't follow this format and the tags submitted via 
> the property mapreduce.job.tags are of the format,
> {flow_name} ,\{flow_version},\{flow_run_id}
> Due to this, YARN falls back to default values for flow name, flow version 
> and flow run id which in turn are used in ATSv2.
> There are 2 approaches that could be taken to make MR tags compatible with 
> ATSv2,
> Fix in the MR code
>  -------------------------
>  Prefix any tags specified with the ones needed by the YARN Timeline Service 
> v2. But MR is legacy code and hence these changes could affect how users are 
> using these tags.
> Add a note in mapred-default.xml
>  --------------------------------------------
>  Add notes in the property name, mapreduce.job.tags mentioning that for 
> purposes of ATSv2, prefixes need to be added to the tag names.

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