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https://issues.apache.org/jira/browse/SPARK-22215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16194623#comment-16194623
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Apache Spark commented on SPARK-22215:
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User 'mgaido91' has created a pull request for this issue:
https://github.com/apache/spark/pull/19447

> Add a configuration parameter to set max size for generated classes
> -------------------------------------------------------------------
>
>                 Key: SPARK-22215
>                 URL: https://issues.apache.org/jira/browse/SPARK-22215
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Marco Gaido
>
> SPARK-18016 introduced an arbitrary threshold for the size of a generated 
> class 
> (https://github.com/apache/spark/blob/83488cc3180ca18f829516f550766efb3095881e/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala#L286).
>  This value is hardcoded.
> Since this is just a guess, in some cases making it smaller can help avoiding 
> the error of exceeding the maximum number of entries in the Constant Pool.
> Then, I suggest to introduce a new configuration parameter, which defaults to 
> the previous value, but it allows to set this to a smaller one if needed.



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