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From "Tom White (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAHOUT-950) Change BtJob to use new MultipleOutputs API
Date Thu, 19 Jan 2012 23:09:43 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13189476#comment-13189476
] 

Tom White commented on MAHOUT-950:
----------------------------------

As a sanity check for 0.20/1.x, I built Hadoop locally with the patch from MAPREDUCE-3607
applied and changed the version of hadoop-core in the POM to 1.1.0-SNAPSHOT. Both LocalSSVDSolverDenseTest
and LocalSSVDSolverSparseSequentialTest passed.
                
> Change BtJob to use new MultipleOutputs API
> -------------------------------------------
>
>                 Key: MAHOUT-950
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-950
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Math
>            Reporter: Tom White
>         Attachments: MAHOUT-950.patch
>
>
> BtJob uses a mixture of the old and new MapReduce API to allow it to use MultipleOutputs
(which isn't available in Hadoop 0.20/1.0). This fails when run against 0.23 (see MAHOUT-822),
so we should change BtJob to use the new MultipleOutputs API. (Hopefully the new MultipleOutputs
API will be made available in a 1.x release - see MAPREDUCE-3607.)

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