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https://issues.apache.org/jira/browse/SPARK-4031?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shivaram Venkataraman resolved SPARK-4031.
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Resolution: Fixed
Fix Version/s: 1.2.0
> Read broadcast variables on use
> -------------------------------
>
> Key: SPARK-4031
> URL: https://issues.apache.org/jira/browse/SPARK-4031
> Project: Spark
> Issue Type: Bug
> Components: Block Manager, Spark Core
> Reporter: Shivaram Venkataraman
> Assignee: Shivaram Venkataraman
> Fix For: 1.2.0
>
>
> This is a proposal to change the broadcast variable implementations in Spark
> to only read values when they are used rather than on deserializing.
> This change will be very helpful (and in our use cases required) for complex
> applications which have a large number of broadcast variables. For example if
> broadcast variables are class members, they are captured in closures even
> when they are not used.
> We could also consider cleaning closures more aggressively, but that might be
> a more complex change.
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