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https://issues.apache.org/jira/browse/SPARK-18341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15692705#comment-15692705
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Apache Spark commented on SPARK-18341:
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User 'yanboliang' has created a pull request for this issue:
https://github.com/apache/spark/pull/16002
> Eliminate use of SingularMatrixException in WeightedLeastSquares logic
> ----------------------------------------------------------------------
>
> Key: SPARK-18341
> URL: https://issues.apache.org/jira/browse/SPARK-18341
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Reporter: Joseph K. Bradley
> Priority: Minor
>
> WeightedLeastSquares uses an Exception to implement fallback logic for which
> solver to use:
> [https://github.com/apache/spark/blob/6f3697136aa68dc39d3ce42f43a7af554d2a3bf9/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala#L258]
> We should use an error code instead of an exception.
> * Note the error code should be internal, not a public API.
> * We may be able to eliminate the SingularMatrixException class.
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