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From "Marco Gaido (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-22226) splitExpression can create too many method calls (generating a Constant Pool limit error)
Date Mon, 09 Oct 2017 16:37:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-22226?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Marco Gaido updated SPARK-22226:
--------------------------------
    Summary: splitExpression can create too many method calls (generating a Constant Pool
limit error)  (was: Code generation fails for dataframes with 10000 columns)

> splitExpression can create too many method calls (generating a Constant Pool limit error)
> -----------------------------------------------------------------------------------------
>
>                 Key: SPARK-22226
>                 URL: https://issues.apache.org/jira/browse/SPARK-22226
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Marco Gaido
>
> Code generation for very wide datasets can fail because of the Constant Pool limit reached.
> This can be caused by many reasons. One of them is that we are currently splitting the
definition of the generated methods among several {{NestedClass}} but all these methods are
called in the main class. Since we have entries added to the constant pool for each method
invocation, this is limiting the number of rows and is leading for very wide dataset to:
> {noformat}
> org.codehaus.janino.JaninoRuntimeException: Constant pool for class org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificMutableProjection
has grown past JVM limit of 0xFFFF
> {noformat}



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