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https://issues.apache.org/jira/browse/SPARK-2585?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Josh Rosen resolved SPARK-2585.
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Resolution: Fixed
Due to the CONFIGURATION_INSTANTIATION_LOCK thread-safety issue, I think that
we'll still end up having to serialize the Configuration separately. If we
didn't, then we'd have to hold CONFIGURATION_INSTANTIATION_LOCK while
deserializing each task, which could have a huge performance penalty (it's fine
to hold the lock while loading the Configuration, since that doesn't take too
long).
Therefore, I'm closing this as "Won't Fix." The thread-safety issues with
Configuration will be addressed by a separate clone() patch.
> Remove special handling of Hadoop JobConf
> -----------------------------------------
>
> Key: SPARK-2585
> URL: https://issues.apache.org/jira/browse/SPARK-2585
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: Patrick Wendell
> Assignee: Josh Rosen
> Priority: Critical
>
> This is a follow up to SPARK-2521 and should close SPARK-2546 (provided the
> implementation does not use shared conf objects). We no longer need to
> specially broadcast the Hadoop configuration since we are broadcasting RDD
> data anyways.
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