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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7244) ShuffleHandler is not aware of disks that are added
Date Fri, 13 Oct 2017 20:04:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16204107#comment-16204107
] 

Jason Lowe commented on YARN-7244:
----------------------------------

I forgot to mention that AuxiliaryLocalPathHandler should be marked Public, Evolving and also
have javadocs since app framework providers will be expected to call these methods.

> ShuffleHandler is not aware of disks that are added
> ---------------------------------------------------
>
>                 Key: YARN-7244
>                 URL: https://issues.apache.org/jira/browse/YARN-7244
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Kuhu Shukla
>            Assignee: Kuhu Shukla
>         Attachments: YARN-7244.001.patch, YARN-7244.002.patch, YARN-7244.003.patch, YARN-7244.004.patch,
YARN-7244.005.patch
>
>
> The ShuffleHandler permanently remembers the list of "good" disks on NM startup. If disks
later are added to the node then map tasks will start using them but the ShuffleHandler will
not be aware of them. The end result is that the data cannot be shuffled from the node leading
to fetch failures and re-runs of the map tasks.



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