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https://issues.apache.org/jira/browse/SPARK-30012?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun resolved SPARK-30012.
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Fix Version/s: 3.0.0
Resolution: Fixed
Issue resolved by pull request 26728
[https://github.com/apache/spark/pull/26728]
> Change classes extending scala collection classes to work with 2.13
> -------------------------------------------------------------------
>
> Key: SPARK-30012
> URL: https://issues.apache.org/jira/browse/SPARK-30012
> Project: Spark
> Issue Type: Sub-task
> Components: Spark Core, SQL
> Affects Versions: 3.0.0
> Reporter: Sean R. Owen
> Assignee: Sean R. Owen
> Priority: Minor
> Fix For: 3.0.0
>
>
> Several classes in the code base extend Scala collection classes, like:
> - ExternalAppendOnlyMap
> - CaseInsensitiveMap
> - AttributeMap
> - (probably more I haven't gotten to yet)
> The collection hierarchy changed in 2.13, and like elsewhere, I don't see
> that it's possible to use a compat library or clever coding to bridge the
> difference. I think we need to maintain two implementations in parallel
> source trees, possibly with a common ancestor with the commonalities.
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