[jira] [Created] (SPARK-36903) oom exception occurred during code generation due to a large number of case when branches

["JacobZheng (Jira)" <ji...@apache.org>]

JacobZheng created SPARK-36903:
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             Summary: 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


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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