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From "Apache Spark (JIRA)" <>
Subject [jira] [Commented] (SPARK-4031) Read broadcast variables on use
Date Tue, 21 Oct 2014 05:44:33 GMT


Apache Spark commented on SPARK-4031:

User 'shivaram' has created a pull request for this issue:

> Read broadcast variables on use
> -------------------------------
>                 Key: SPARK-4031
>                 URL:
>             Project: Spark
>          Issue Type: Bug
>          Components: Block Manager, Spark Core
>            Reporter: Shivaram Venkataraman
>            Assignee: Shivaram Venkataraman
> 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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