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https://issues.apache.org/jira/browse/SPARK-22103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16176597#comment-16176597
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Apache Spark commented on SPARK-22103:
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User 'juliuszsompolski' has created a pull request for this issue:
https://github.com/apache/spark/pull/19324
> Move HashAggregateExec parent consume to a separate function in codegen
> -----------------------------------------------------------------------
>
> Key: SPARK-22103
> URL: https://issues.apache.org/jira/browse/SPARK-22103
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Juliusz Sompolski
>
> HashAggregateExec codegen uses two paths for fast hash table and a generic
> one.
> It generates code paths for iterating over both, and both code paths generate
> the consume code of the parent operator, resulting in that code being
> expanded twice.
> This leads to a long generated function that might be an issue for the
> compiler (see e.g. SPARK-21603).
> I propose to remove the double expansion by generating the consume code in a
> helper function that can just be called from both iterating loop.
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