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https://issues.apache.org/jira/browse/MAHOUT-1882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15576800#comment-15576800
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Suneel Marthi commented on MAHOUT-1882:
---------------------------------------

Is there a reproducible test case ? 

> SequentialAccessSparseVector inerateNonZeros is incorrect.
> ----------------------------------------------------------
>
>                 Key: MAHOUT-1882
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1882
>             Project: Mahout
>          Issue Type: Bug
>          Components: Math
>    Affects Versions: 0.12.2
>            Reporter: Andrew Palumbo
>             Fix For: 0.13.0
>
>
> In {{SequentialAccessSparseVector}} a bug is noted.  When Cuonting Non-Zero 
> elements {{NonDefaultIterator}} can, under certain circumstances give an 
> incorrect iterator of size different from the actual non-zeroCounts.
> {code}
>  @Override
>   public Iterator<Element> iterateNonZero() {
>     // TODO: this is a bug, since nonDefaultIterator doesn't hold to non-zero 
> contract.
>     return new NonDefaultIterator();
>   }
> {code}



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