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https://issues.apache.org/jira/browse/YARN-2748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14544093#comment-14544093
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Vinod Kumar Vavilapalli commented on YARN-2748:
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bq. One question is if we want to support a single-level sub folder or 
recursive sub folders.
When I originally did log-aggregation before YARN got merged into Hadoop, I 
intentially avoided sub-folders as it added unnecessary complexity and lacked 
real life use-cases. What is the use-case for doing this now?

> Upload logs in the sub-folders under the local log dir when aggregating logs
> ----------------------------------------------------------------------------
>
>                 Key: YARN-2748
>                 URL: https://issues.apache.org/jira/browse/YARN-2748
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: log-aggregation
>    Affects Versions: 2.6.0
>            Reporter: Zhijie Shen
>            Assignee: Varun Saxena
>              Labels: BB2015-05-RFC
>         Attachments: YARN-2748.001.patch, YARN-2748.002.patch, 
> YARN-2748.03.patch, YARN-2748.04.patch
>
>
> YARN-2734 has a temporal fix to skip sub folders to avoid exception. Ideally, 
> if the app is creating a sub folder and putting its rolling logs there, we 
> need to upload these logs as well.



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