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https://issues.apache.org/jira/browse/SPARK-8733?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14610408#comment-14610408
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Apache Spark commented on SPARK-8733:
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User 'ilganeli' has created a pull request for this issue:
https://github.com/apache/spark/pull/7160
> ML RDD.unpersist calls should use blocking = false
> --------------------------------------------------
>
> Key: SPARK-8733
> URL: https://issues.apache.org/jira/browse/SPARK-8733
> Project: Spark
> Issue Type: Improvement
> Components: ML, MLlib
> Reporter: Joseph K. Bradley
> Attachments: Screen Shot 2015-06-30 at 10.51.44 AM.png
>
> Original Estimate: 72h
> Remaining Estimate: 72h
>
> MLlib uses unpersist in many places, but is not consistent about blocking vs
> not. We should check through all of MLlib and change calls to use blocking =
> false, unless there is a real need to block. I have run into issues with
> futures timing out because of unpersist() calls, when there was no real need
> for the ML method to fail.
> See attached screenshot. Training succeeded, but the final unpersist during
> cleanup failed.
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