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From "Rohith Sharma K S (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-7062) Update mapreduce.job.tags description for making use for ATSv2 purpose.
Date Wed, 11 Apr 2018 04:17:00 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-7062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16433378#comment-16433378

Rohith Sharma K S commented on MAPREDUCE-7062:

+1 lgtm

> 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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