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https://issues.apache.org/jira/browse/SPARK-3084?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matei Zaharia updated SPARK-3084:
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Target Version/s: 1.1.0
> Collect broadcasted tables in parallel in joins
> -----------------------------------------------
>
> Key: SPARK-3084
> URL: https://issues.apache.org/jira/browse/SPARK-3084
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Matei Zaharia
> Assignee: Matei Zaharia
>
> BroadcastHashJoin has a broadcastFuture variable that tries to collect the
> broadcasted table in a separate thread, but this doesn't help because it's a
> lazy val that only gets initialized when you attempt to build the RDD. Thus
> queries that broadcast multiple tables would collect and broadcast them
> sequentially.
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