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Laurent Hoss commented on TOREE-500: ------------------------------------ It's working again with Spark 2.4.3 (that is again compiled with Scala 2.11 as in < v2.4.1) The jupyter docker-stacks had the same issue with Spark v2.4.2, see: [https://github.com/jupyter/docker-stacks/issues/860] Assuming upgrading to 2.4.3 works forĀ [~masayuki038], this issue could be closed > Failed to start Toree on Spark 2.4.2 > ------------------------------------ > > Key: TOREE-500 > URL: https://issues.apache.org/jira/browse/TOREE-500 > Project: TOREE > Issue Type: Bug > Components: Kernel > Affects Versions: 0.3.0 > Environment: * Docker Container(openjdk8) > * Python 3.5 > Reporter: Masayuki Takahashi > Priority: Major > > {code} > [I 04:07:48.726 NotebookApp] Kernel started: > 1d46275c-71d6-4062-bc22-a98593d6c374 > Starting Spark Kernel with SPARK_HOME=/spark > 19/05/05 04:07:53 WARN NativeCodeLoader: Unable to load native-hadoop library > for your platform... using builtin-java classes where applicable > Exception in thread "main" java.lang.NoClassDefFoundError: scala/App$class > at org.apache.toree.Main$.<init>(Main.scala:24) > at org.apache.toree.Main$.<clinit>(Main.scala) > at org.apache.toree.Main.main(Main.scala) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:498) > at > org.apache.spark.deploy.JavaMainApplication.start(SparkApplication.scala:52) > at > org.apache.spark.deploy.SparkSubmit.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:849) > at > org.apache.spark.deploy.SparkSubmit.doRunMain$1(SparkSubmit.scala:167) > at org.apache.spark.deploy.SparkSubmit.submit(SparkSubmit.scala:195) > at org.apache.spark.deploy.SparkSubmit.doSubmit(SparkSubmit.scala:86) > at > org.apache.spark.deploy.SparkSubmit$$anon$2.doSubmit(SparkSubmit.scala:924) > at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:933) > at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala) > Caused by: java.lang.ClassNotFoundException: scala.App$class > at java.net.URLClassLoader.findClass(URLClassLoader.java:382) > at java.lang.ClassLoader.loadClass(ClassLoader.java:424) > at java.lang.ClassLoader.loadClass(ClassLoader.java:357) > {code} > Toree on Spark 2.4.1 works for me. > See: https://github.com/jupyter/docker-stacks/issues/860 -- This message was sent by Atlassian JIRA (v7.6.3#76005)