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https://issues.apache.org/jira/browse/MAHOUT-1799?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Suneel Marthi resolved MAHOUT-1799.
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Resolution: Fixed
> Read null row vectors from file in TextDelimeterReaderWriter driver
> -------------------------------------------------------------------
>
> Key: MAHOUT-1799
> URL: https://issues.apache.org/jira/browse/MAHOUT-1799
> Project: Mahout
> Issue Type: Improvement
> Components: spark
> Reporter: Jussi Jousimo
> Assignee: Pat Ferrel
> Priority: Minor
> Fix For: 1.0.0
>
>
> Since some row vectors in a sparse matrix can be null, Mahout writes them out
> to a file with the row label only. However, Mahout cannot read these files,
> but throws an exception when it encounters a label-only row.
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