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https://issues.apache.org/jira/browse/SPARK-21337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16077730#comment-16077730
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fengchaoge commented on SPARK-21337:
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> SQL which has large ‘case when’ expressions may cause code generation beyond 
> 64KB
> ---------------------------------------------------------------------------------
>
>                 Key: SPARK-21337
>                 URL: https://issues.apache.org/jira/browse/SPARK-21337
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.1.1
>         Environment: spark-2.1.1-hadoop-2.6.0-cdh-5.4.2
>            Reporter: fengchaoge
>             Fix For: 2.1.1
>
>
> when there are large 'case when ' expressions in spark sql,the CodeGenerator 
> failed to compile it. 
> ERROR INFO:
> java.util.concurrent.ExecutionException: java.lang.Exception: failed to 
> compile: org.codehaus.janino.JaninoRuntimeException: Code of method 
> "apply_9$(Lorg/apache/spark/sql/catalyst/expressions/GeneratedClass$SpecificUnsafeProjection;Lorg/apache/spark/sql/catalyst/InternalRow;)V"
>  of class 
> "org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection"
>  grows beyond 64 KB
> SPARK-13242 have solve this problem in spark-1.6.1,however apparence in 
> spark-2.1.1 again。https://issues.apache.org/jira/browse/SPARK-13242。
> is there something wrong ? 



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