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https://issues.apache.org/jira/browse/BEAM-1828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15948883#comment-15948883
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ASF GitHub Bot commented on BEAM-1828:
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Github user asfgit closed the pull request at:
https://github.com/apache/beam/pull/2355
> GlobalWatermarkHolder uses unpersist instead of destory
> -------------------------------------------------------
>
> Key: BEAM-1828
> URL: https://issues.apache.org/jira/browse/BEAM-1828
> Project: Beam
> Issue Type: Bug
> Components: runner-spark
> Reporter: Stas Levin
> Assignee: Stas Levin
> Priority: Minor
>
> {{GlobalWatermarkHolder}} uses {{unpersist}} when it's done with the
> broadcast, however, this leaves a copy of the broadcast in the driver's
> memory so {{destroy}} may be more appropriate for this.
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