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https://issues.apache.org/jira/browse/SPARK-4530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14224378#comment-14224378
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Apache Spark commented on SPARK-4530:
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User 'witgo' has created a pull request for this issue:
https://github.com/apache/spark/pull/3399
> GradientDescent get a wrong gradient value according to the gradient formula,
> which is caused by the miniBatchSize parameter.
> -----------------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-4530
> URL: https://issues.apache.org/jira/browse/SPARK-4530
> Project: Spark
> Issue Type: Bug
> Components: MLlib
> Affects Versions: 1.0.0, 1.1.0, 1.2.0
> Reporter: Guoqiang Li
> Assignee: Guoqiang Li
> Priority: Minor
> Fix For: 1.2.0
>
>
> This bug is caused by {{RDD.sample}}
> The number of {{RDD.sample}} returns is not fixed.
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