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https://issues.apache.org/jira/browse/MAHOUT-159?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12744496#action_12744496
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Grant Ingersoll commented on MAHOUT-159:
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Hmm, seems some tests fail with this patch. TestKMeans, etc. I haven't
investigated yet and it is likely something is wrong in the tests, but they are
still there.
> SparseVector and DenseVector hashCode does not conform to the Java standard
> ---------------------------------------------------------------------------
>
> Key: MAHOUT-159
> URL: https://issues.apache.org/jira/browse/MAHOUT-159
> Project: Mahout
> Issue Type: Bug
> Components: Matrix
> Affects Versions: 0.2
> Reporter: Mark Desnoyer
> Assignee: Grant Ingersoll
> Priority: Critical
> Attachments: MAHOUT-159.patch, MAHOUT-159.patch, MAHOUT-159.patch
>
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> The hash codes for SparseVector and DenseVector will not be equal even though
> equals() may return true. Also, the equals logic is inconsistent because
> DenseVector takes into account the name parameter but SparseVector does not.
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