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Posted to issues@spark.apache.org by "Michael Armbrust (JIRA)" <ji...@apache.org> on 2014/08/18 19:08:19 UTC

[jira] [Resolved] (SPARK-3084) Collect broadcasted tables in parallel in joins

     [ https://issues.apache.org/jira/browse/SPARK-3084?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Armbrust resolved SPARK-3084.
-------------------------------------

       Resolution: Fixed
    Fix 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
>             Fix For: 1.1.0
>
>
> 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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