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Posted to issues@tez.apache.org by "Bikas Saha (JIRA)" <ji...@apache.org> on 2013/12/19 11:54:07 UTC

[jira] [Resolved] (TEZ-681) Grouping generates incorrect splits if multiple DNs run on a single node

     [ https://issues.apache.org/jira/browse/TEZ-681?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bikas Saha resolved TEZ-681.
----------------------------

       Resolution: Fixed
    Fix Version/s: 0.3.0

committing the deduping approach. we can revert to the second approach if perf becomes an issue.

commit cd9d4de62c7a9290a5067c4358878ca915c7a9d2
Author: Bikas Saha <bi...@apache.org>
Date:   Thu Dec 19 01:49:06 2013 -0800

    TEZ-681. Grouping generates incorrect splits if multiple DNs run on a single node (bikas)



> Grouping generates incorrect splits if multiple DNs run on a single node
> ------------------------------------------------------------------------
>
>                 Key: TEZ-681
>                 URL: https://issues.apache.org/jira/browse/TEZ-681
>             Project: Apache Tez
>          Issue Type: Bug
>            Reporter: Siddharth Seth
>            Assignee: Bikas Saha
>            Priority: Critical
>             Fix For: 0.3.0
>
>         Attachments: TEZ-681.1.patch, TEZ-681.2.patch, grouping_tmp_patch.txt
>
>
> When running multiple DNs on a single node (MiniDFSCluster for example), grouping ends up using the same split multiple times while grouping - so the end result is Grouped splits with some original splits repeated, and others completely missed out.



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