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https://issues.apache.org/jira/browse/MAHOUT-964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13195931#comment-13195931
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Suneel Marthi commented on MAHOUT-964:
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Looking at the past Jira issues, this issue had already been reported before in
Mahout-834 (https://issues.apache.org/jira/browse/MAHOUT-834) and the issue's
still open.
Grant, how would you like to proceed on this?
> RowSimilarityJob should exit immediately if an invalid similarity measure
> specified and it would be nice to have an --overwrite option for the
> RowSimilarityJob CLI
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: MAHOUT-964
> URL: https://issues.apache.org/jira/browse/MAHOUT-964
> Project: Mahout
> Issue Type: Improvement
> Components: Math
> Affects Versions: 0.6
> Environment: Mahout 0.6 snapshot from trunk
> Reporter: Suneel Marthi
> Assignee: Suneel Marthi
> Attachments: Mahout-964.patch
>
>
> 1. If an invalid Similarity Measure has been specified as input to the
> RowSimilarityJob, it presently throws a ClassNotFoundException but still
> proceeds with executing all of the subsequent tasks - VectorNormalizer,
> Cooccurrences Mapper and UnSymmetrify Mapper. We should exit the process
> early without having to invoke all of the subsequent tasks (all of them fail
> anyways).
> 2. It would be nice to have an --overwrite option for the Command line
> interface which would delete the temp and output paths at the beginning of
> RowSimilarityJob execution, similar to what's being done in seq2sparse,
> seqdirectory. If I run RowSimilarityJob over and over again with different
> similarity measures, I should not be forced to delete my temp and output
> paths first prior to invoking the job.
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