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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-18118) SpecificSafeProjection.apply of Java Object from Dataset to JavaRDD Grows Beyond 64 KB
Date Mon, 28 Nov 2016 09:40:59 GMT

    [ https://issues.apache.org/jira/browse/SPARK-18118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15701463#comment-15701463
] 

Apache Spark commented on SPARK-18118:
--------------------------------------

User 'kiszk' has created a pull request for this issue:
https://github.com/apache/spark/pull/16032

> SpecificSafeProjection.apply of Java Object from Dataset to JavaRDD Grows Beyond 64 KB
> --------------------------------------------------------------------------------------
>
>                 Key: SPARK-18118
>                 URL: https://issues.apache.org/jira/browse/SPARK-18118
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.1.0
>            Reporter: Aleksander Eskilson
>
> For sufficiently wide or nested Java Objects, when SpecificSafeProjection attempts to
recreate the object from an InternalRow, the generated SpecificSafeProjection.apply method
is larger than allowed: 
> {code}
> Caused by: org.codehaus.janino.JaninoRuntimeException: Code of method "apply(Ljava/lang/Object;)Ljava/lang/Object;"
of class "org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificSafeProjection"
grows beyond 64 KB
> {code}
> Although related, this issue appears not to have been resolved by SPARK-15285. Since
there is only one top-level object when projecting, splitExpressions finds no additional Expressions
to split. The result is a single large, nested Expression that forms the apply code.
> See the reproducer for an example [1].
> [1] - https://github.com/bdrillard/specific-safe-projection-error



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