使用Apache Toree Scala内核在我的Jupyter笔记本中添加依赖项后，例如vegas：
%AddDeps org.vegas-viz vegas_2.11 0.3.11 --transitive
然后当我尝试从这个JAR导入一些东西时，我得到一个很长的堆栈跟踪。在笔记本中，我这样做：
import vegas._
import vegas.render.WindowRenderer._
命令行（我开始使用Jupyter）显示了一个很长的堆栈跟踪：
17/09/25 12:41:16 ERROR OneForOneStrategy: object Predef does not have a member classOf
scala.reflect.internal.FatalError: object Predef does not have a member classOf
at scala.reflect.internal.Definitions$DefinitionsClass.scala$reflect$internal$Definitions$DefinitionsClass$$fatalMissingSymbol(Definitions.scala:1186)
at scala.reflect.internal.Definitions$DefinitionsClass.getMember(Definitions.scala:1203)
at scala.reflect.internal.Definitions$DefinitionsClass.getMemberMethod(Definitions.scala:1238)
at scala.reflect.internal.Definitions$DefinitionsClass$RunDefinitions.Predef_classOf$lzycompute(Definitions.scala:1469)
at scala.reflect.internal.Definitions$DefinitionsClass$RunDefinitions.Predef_classOf(Definitions.scala:1469)
at scala.reflect.internal.Definitions$DefinitionsClass$RunDefinitions.isPredefClassOf(Definitions.scala:1459)
at scala.tools.nsc.typechecker.Typers$Typer.typedIdent$2(Typers.scala:4885)
at scala.tools.nsc.typechecker.Typers$Typer.typedIdentOrWildcard$1(Typers.scala:4908)
at scala.tools.nsc.typechecker.Typers$Typer.typedInAnyMode$1(Typers.scala:5340)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5360)
at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5396)
at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedInternal(Typers.scala:5423)
at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5370)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5374)
at scala.tools.nsc.interpreter.ReplGlobal$$anon$1$$anon$2.typed(ReplGlobal.scala:36)
at scala.tools.nsc.typechecker.Typers$Typer.typedQualifier(Typers.scala:5472)
at scala.tools.nsc.typechecker.Typers$Typer.typedQualifier(Typers.scala:5480)
at scala.tools.nsc.typechecker.Typers$Typer.typedPackageDef$1(Typers.scala:5012)
at scala.tools.nsc.typechecker.Typers$Typer.typedMemberDef$1(Typers.scala:5312)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5359)
at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5396)
at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedInternal(Typers.scala:5423)
at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5370)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5374)
at scala.tools.nsc.interpreter.ReplGlobal$$anon$1$$anon$2.typed(ReplGlobal.scala:36)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5448)
at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.apply(Analyzer.scala:102)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$applyPhase$1.apply$mcV$sp(Global.scala:440)
at scala.tools.nsc.Global$GlobalPhase.withCurrentUnit(Global.scala:431)
at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:440)
at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3$$anonfun$run$1.apply(Analyzer.scala:94)
at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3$$anonfun$run$1.apply(Analyzer.scala:93)
at scala.collection.Iterator$class.foreach(Iterator.scala:893)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)
at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.run(Analyzer.scala:93)
at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1501)
at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1486)
at scala.tools.nsc.Global$Run.compileSources(Global.scala:1481)
at scala.tools.nsc.interpreter.IMain.compileSourcesKeepingRun(IMain.scala:435)
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compileAndSaveRun(IMain.scala:855)
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compile(IMain.scala:813)
at scala.tools.nsc.interpreter.IMain$Request.compile$lzycompute(IMain.scala:1002)
at scala.tools.nsc.interpreter.IMain$Request.compile(IMain.scala:997)
at scala.tools.nsc.interpreter.IMain.compile(IMain.scala:579)
at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:567)
at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:565)
at org.apache.toree.kernel.interpreter.scala.ScalaInterpreterSpecific$$anonfun$interpretAddTask$1$$anonfun$apply$3.apply(ScalaInterpreterSpecific.scala:368)
at org.apache.toree.kernel.interpreter.scala.ScalaInterpreterSpecific$$anonfun$interpretAddTask$1$$anonfun$apply$3.apply(ScalaInterpreterSpecific.scala:363)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
at scala.Console$.withErr(Console.scala:80)
at org.apache.toree.global.StreamState$$anonfun$1$$anonfun$apply$1.apply(StreamState.scala:73)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
at scala.Console$.withOut(Console.scala:53)
at org.apache.toree.global.StreamState$$anonfun$1.apply(StreamState.scala:72)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
at scala.Console$.withIn(Console.scala:124)
at org.apache.toree.global.StreamState$.withStreams(StreamState.scala:71)
at org.apache.toree.kernel.interpreter.scala.ScalaInterpreterSpecific$$anonfun$interpretAddTask$1.apply(ScalaInterpreterSpecific.scala:362)
at org.apache.toree.kernel.interpreter.scala.ScalaInterpreterSpecific$$anonfun$interpretAddTask$1.apply(ScalaInterpreterSpecific.scala:362)
at org.apache.toree.utils.TaskManager$$anonfun$add$2$$anon$1.run(TaskManager.scala:140)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
我在Linux Mint 18.1（基于Ubuntu 16.04）和Apache Toree版本上使用Jupyter 4.3.0：
VERSION: 0.2.0.dev1-incubating
COMMIT: 9b577f19df83
我怀疑我得到的错误可能与Apache Toree和scala版本之间的不兼容性有关...或者某事......有关如何继续这个的任何建议？非常感谢提前： - ）
答案 0 :(得分：0)
你是对的，这是由于依赖冲突。我遇到了同样的问题。这是由于scala-reflect-2.11.6和scala-reflect-2.11.8之间的冲突。我不得不手动将vegas-viz及其依赖项安装到本地maven repo。然后在配置文件中添加vegas-viz作为sparks.jars.pacakages，而不是在运行时加载它。
或者您可以排除版本。