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From "Jonathan Neufeld (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Deleted] (SPARK-6152) Spark does not support Java 8 compiled Scala classes
Date Wed, 18 Mar 2015 23:39:38 GMT

     [ https://issues.apache.org/jira/browse/SPARK-6152?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Neufeld updated SPARK-6152:
------------------------------------
    Comment: was deleted

(was: The exception is raised in com.esotericsoftware.reflectasm.shaded.org.objectweb.asm.ClassReader

It looks like it's this line:
if(this.readShort(6) > 51) {
            throw new IllegalArgumentException();

I checked the result of readShort and found it to be 52 in my environment.

It bears the mark of a compiled class file version compatibility problem to me.)

> Spark does not support Java 8 compiled Scala classes
> ----------------------------------------------------
>
>                 Key: SPARK-6152
>                 URL: https://issues.apache.org/jira/browse/SPARK-6152
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 1.2.1
>         Environment: Java 8+
> Scala 2.11
>            Reporter: Ronald Chen
>            Priority: Minor
>
> Spark uses reflectasm to check Scala closures which fails if the *user defined Scala
closures* are compiled to Java 8 class version
> The cause is reflectasm does not support Java 8
> https://github.com/EsotericSoftware/reflectasm/issues/35
> Workaround:
> Don't compile Scala classes to Java 8, Scala 2.11 does not support nor require any Java
8 features
> Stack trace:
> {code}
> java.lang.IllegalArgumentException
> 	at com.esotericsoftware.reflectasm.shaded.org.objectweb.asm.ClassReader.<init>(Unknown
Source)
> 	at com.esotericsoftware.reflectasm.shaded.org.objectweb.asm.ClassReader.<init>(Unknown
Source)
> 	at com.esotericsoftware.reflectasm.shaded.org.objectweb.asm.ClassReader.<init>(Unknown
Source)
> 	at org.apache.spark.util.ClosureCleaner$.org$apache$spark$util$ClosureCleaner$$getClassReader(ClosureCleaner.scala:41)
> 	at org.apache.spark.util.ClosureCleaner$.getInnerClasses(ClosureCleaner.scala:84)
> 	at org.apache.spark.util.ClosureCleaner$.clean(ClosureCleaner.scala:107)
> 	at org.apache.spark.SparkContext.clean(SparkContext.scala:1478)
> 	at org.apache.spark.rdd.RDD.map(RDD.scala:288)
> 	at ...my Scala 2.11 compiled to Java 8 code calling into spark
> {code}



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