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Posted to issues@spark.apache.org by "Kazuaki Ishizaki (JIRA)" <ji...@apache.org> on 2018/01/01 19:13:00 UTC
[jira] [Commented] (SPARK-21413) Multiple projections with CASE
WHEN fails to run generated codes
[ https://issues.apache.org/jira/browse/SPARK-21413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16307531#comment-16307531 ]
Kazuaki Ishizaki commented on SPARK-21413:
------------------------------------------
SPARK-22520 solved this issue.
> Multiple projections with CASE WHEN fails to run generated codes
> ----------------------------------------------------------------
>
> Key: SPARK-21413
> URL: https://issues.apache.org/jira/browse/SPARK-21413
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Hyukjin Kwon
>
> Scala codes to reproduce are as below:
> {code}
> import org.apache.spark.sql.functions._
> import org.apache.spark.sql.types._
> import org.apache.spark.sql.Row
> val schema = StructType(StructField("fieldA", IntegerType) :: Nil)
> var df = spark.createDataFrame(spark.sparkContext.parallelize(Seq(Row(1))), schema)
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df.show()
> {code}
> Calling {{explain()}} on the dataframe in the former case shows a huge case-when projection and {{show()}} fails with the exception as below:
> {code}
> ...
> Caused by: org.codehaus.janino.JaninoRuntimeException: Code of method "apply_0$(Lorg/apache/spark/sql/catalyst/expressions/GeneratedClass$SpecificUnsafeProjection;Lorg/apache/spark/sql/catalyst/InternalRow;)V" of class "org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection" grows beyond 64 KB
> at org.codehaus.janino.CodeContext.makeSpace(CodeContext.java:949)
> at org.codehaus.janino.CodeContext.write(CodeContext.java:839)
> at org.codehaus.janino.UnitCompiler.writeOpcode(UnitCompiler.java:11081)
> at org.codehaus.janino.UnitCompiler.pushConstant(UnitCompiler.java:9674)
> at org.codehaus.janino.UnitCompiler.compileGet2(UnitCompiler.java:4911)
> at org.codehaus.janino.UnitCompiler.access$7700(UnitCompiler.java:206)
> at org.codehaus.janino.UnitCompiler$12.visitIntegerLiteral(UnitCompiler.java:3776)
> ...
> {code}
> Note that, I could not reproduce this with local relation (this one appears by {{ConvertToLocalRelation}}).
> {code}
> import org.apache.spark.sql.functions._
> var df = Seq(1).toDF("fieldA")
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df = df.withColumn("fieldA", when($"fieldA" === 0, null).otherwise($"fieldA"))
> df.show()
> {code}
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