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From "Ronald Chen (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (SPARK-6152) Spark does not support Java 8 compiled Scala classes
Date Fri, 20 Mar 2015 16:53:38 GMT

    [ https://issues.apache.org/jira/browse/SPARK-6152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14371608#comment-14371608
] 

Ronald Chen edited comment on SPARK-6152 at 3/20/15 4:53 PM:
-------------------------------------------------------------

If you want to get the new version via {{chill}}, you will also need to wait for a release
of {{kryo}} as {{chill}} gets the dependency via {{kryo}}

I think the root cause here is we are using a shaded library in a third party dependency.
 Sounds like a bad practise.  We should just depend on an unshaded reflectasm directly

{{kyro}} just updated to {{reflectasm-1.10.1}} four hours ago, so this dependency train will
take a while to arrive.


was (Author: pyrolistical):
If you want to get the new version via {{chill}}, you will also need to wait for a release
of {{kryo}} as {{chill}} gets the dependency via {{kryo}}

I think the root cause here is we are using a shaded library in a third party dependency.
 Sounds like a bad practise.  We should just depend on an unshaded reflectasm directly

{{kyro}} just updated to {{reflectasm-1.10.1}} four hours ago, so this dependency chain will
take a while to arrive.

> 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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