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From "Marco Gaido (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-22692) Reduce the number of generated mutable states
Date Tue, 05 Dec 2017 12:14:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-22692?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16278458#comment-16278458
] 

Marco Gaido commented on SPARK-22692:
-------------------------------------

I felt this was the best way to go in order to split the discussion on them, since there are
many places and I saw the same approach for the 64KB limit issue (SPARK-22510).

> Reduce the number of generated mutable states
> ---------------------------------------------
>
>                 Key: SPARK-22692
>                 URL: https://issues.apache.org/jira/browse/SPARK-22692
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.3.0
>            Reporter: Marco Gaido
>
> A large number of mutable states can cause a error during code generation due to reaching
the constant pool limit. There is an ongoing effort on SPARK-18016 to fix the problem, nonetheless
we can also alleviate it avoiding to create a global variables when they are not needed.
> Therefore I am creating this umbrella ticket to track the elimination of usage of global
variables where not needed. This is not a duplicate or an alternative to SPARK-18016: this
is a complementary effort which can help together with it to support wider datasets.



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