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https://issues.apache.org/jira/browse/MAHOUT-849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13133566#comment-13133566
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Lance Norskog commented on MAHOUT-849:
--------------------------------------
My code attempted to multiply two MxN matrices which gives this complaint
string. The test probes a cardinality mistake, but just catches the
CardinalityException. In this case the class and test are correct, but the
error messages are confusing. The JUnit annotation that examines exceptions
would need a "required string" to find this.
> Wrong error messages in AbstractMatrix
> --------------------------------------
>
> Key: MAHOUT-849
> URL: https://issues.apache.org/jira/browse/MAHOUT-849
> Project: Mahout
> Issue Type: Bug
> Reporter: Lance Norskog
> Assignee: Sean Owen
> Priority: Trivial
> Fix For: 0.6
>
> Attachments: MAHOUT-849.patch
>
>
> AbstractMatrix prints out the wrong number when checking cardinality in
> times(Vector) and times(Matrix).
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