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https://issues.apache.org/jira/browse/MAHOUT-1799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15199763#comment-15199763
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ASF GitHub Bot commented on MAHOUT-1799:
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Github user pferrel commented on the pull request:
https://github.com/apache/mahout/pull/182#issuecomment-197944335
Looks fine, I can't test it now. There may be cases where a row is null in
the input but this treats those as non-error conditions so will not complain in
logs. I'm a bit ambivalent about the need for this, can @statguy explain why a
null row is not an error, might is be better to print a warning?
> 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: 0.12.0
>
>
> 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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