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https://issues.apache.org/jira/browse/SPARK-12450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15066629#comment-15066629
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RJ Nowling commented on SPARK-12450:
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File a PR here: [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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