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https://issues.apache.org/jira/browse/SPARK-12450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15066631#comment-15066631
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Apache Spark commented on SPARK-12450:
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User 'rnowling' has created a pull request for this issue:
https://github.com/apache/spark/pull/10415

> Un-persist broadcasted variables in KMeans
> ------------------------------------------
>
>                 Key: SPARK-12450
>                 URL: https://issues.apache.org/jira/browse/SPARK-12450
>             Project: Spark
>          Issue Type: Improvement
>          Components: MLlib
>    Affects Versions: 1.4.1, 1.5.2
>            Reporter: RJ Nowling
>            Priority: Minor
>
> The broadcasted centers in KMeans are never un-persisted.  As a result, 
> memory usage accumulates with usage causing a memory leak.



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