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https://issues.apache.org/jira/browse/SPARK-34588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17299215#comment-17299215
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Hyukjin Kwon commented on SPARK-34588:
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That's incredible [~dishka_krauch]!

> Support int64 buffer lengths in Java for pyspark Pandas UDF as buffer 
> expanding
> -------------------------------------------------------------------------------
>
>                 Key: SPARK-34588
>                 URL: https://issues.apache.org/jira/browse/SPARK-34588
>             Project: Spark
>          Issue Type: Improvement
>          Components: PySpark
>    Affects Versions: 3.0.2
>         Environment: Hadoop part:
>  * spark 3.0.2
>  * java 1.8.0_77
>  * scala 2.12.10
> Python part:
>  * cython 0.29.22
>  * numpy 1.19.5
>  * pandas 1.1.5
>  * pyarrow 2.0.0
>            Reporter: Dmitry Kravchuk
>            Priority: Major
>
> This issue is an extention of [arrow 
> issue|https://issues.apache.org/jira/browse/ARROW-10957#] for making possible 
> using pyspark Pandas UDF functions for data more than 2gb per data group.
> Here is the deal - arrow [supports 
> |https://github.com/apache/arrow/commit/9742007c463e253e2b916e65f668146953456a00#diff-2e086b32ec292aae20695dd4341c647c9a9d7d3d77816bf849f7fbf68e9fa6cfR209]long
>  type for data serialization between java and python but spark doesn't. It 
> gives a lot of problem when somebody is trying to apply Pandas UDF for 
> dataset where any group is more than 2^32(-1) bytes what is equal to 2gb. 
> Solving this problem will help to use more data per Pandas UDF groupping - 
> 2^64(-1) bytes.



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