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https://issues.apache.org/jira/browse/SPARK-6152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14575540#comment-14575540
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Malcolm Greaves commented on SPARK-6152:
----------------------------------------
It appears as if progress on updating chill to use a version of reflectasm that
is compatible with Java 1.8 has stalled:
https://github.com/twitter/chill/pull/224
> 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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