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Posted to dev@mahout.apache.org by "Tom White (Commented) (JIRA)" <ji...@apache.org> on 2012/01/20 00:09:43 UTC
[jira] [Commented] (MAHOUT-950) Change BtJob to use new
MultipleOutputs API
[ 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:
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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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