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https://issues.apache.org/jira/browse/MAHOUT-644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13014042#comment-13014042
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Sean Owen commented on MAHOUT-644:
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That's my "fault", I changed that behavior. In the case that mapper.getVector()
was null, the iterator was returning a null. Is that normal behavior? It
doesn't sound right. It means that TermVectorMapper.setExpectations() was never
called.
Either...
- That's a problem and this has uncovered it, so, what's your input that
triggers this?
- Or it's normal, and signals end of iteration
- Or it's normal, and we really should return a null in the iteration
Do you know what's the right thing?
> LuceneIterable does not throw exception if field does not have term vectors
> ---------------------------------------------------------------------------
>
> Key: MAHOUT-644
> URL: https://issues.apache.org/jira/browse/MAHOUT-644
> Project: Mahout
> Issue Type: Improvement
> Components: Utils
> Affects Versions: 0.4
> Reporter: Frank Scholten
> Assignee: Sean Owen
> Priority: Minor
> Fix For: 0.5
>
> Attachments: MAHOUT-644.patch, MAHOUT-644.patch
>
>
> LuceneIterable does not throw an exception when it tries to create Mahout
> vectors from a field without term vectors. It should throw an
> IllegalStateException and not silently continue and return null vectors.
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