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https://issues.apache.org/jira/browse/SPARK-3317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14115857#comment-14115857
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Apache Spark commented on SPARK-3317:
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User 'dbtsai' has created a pull request for this issue:
https://github.com/apache/spark/pull/2207
> The loss of regularization in Updater should use the oldWeights
> ---------------------------------------------------------------
>
> Key: SPARK-3317
> URL: https://issues.apache.org/jira/browse/SPARK-3317
> Project: Spark
> Issue Type: Bug
> Components: MLlib
> Reporter: DB Tsai
>
> The current loss of the regularization is computed from the newWeights which
> is not correct. The loss, R(w) = 1/2 ||w||^2 should be computed with the
> oldWeights.
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