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https://issues.apache.org/jira/browse/SPARK-36903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17423124#comment-17423124
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Hyukjin Kwon commented on SPARK-36903:
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oh wait that configuration is removed by optimization later in Spark 2.3
(SPARK-22520). Can you try if you still face the same issue in Spark 3.1 too?
Otherwise, you would better have to show self-contained reproducer with error
message.
> oom exception occurred during code generation due to a large number of case
> when branches
> -----------------------------------------------------------------------------------------
>
> Key: SPARK-36903
> URL: https://issues.apache.org/jira/browse/SPARK-36903
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 3.0.1
> Reporter: JacobZheng
> Priority: Major
>
> I have a spark task that contains many case when branches. When I run it, the
> driver throws an oom exception in the codegen phase. What I expect is if it
> is possible to detect or limit it in the codegen phase to avoid this.
>
> I see that spark 2.2 has a configuration item
> spark.sql.codegen.maxCaseBranches. would it help my situation if I try to add
> this limit back?
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