当我尝试在 Eclipse 中编译 Scala 项目时，出现以下错误（堆栈跟踪位于末尾）。它表示 Java 类 TransportConf（位于 Java 构建路径中指定的 Spark-network-common 项目中）上的断言失败。我检查了目标文件夹并且 TransportConf.class 存在
问题的可能原因，因为它之前工作：
- 我正在将上游/master 的代码合并到我的项目中，并引入了新的依赖项。我通常运行 sbt {reload, eclipse with-source=true} 然后刷新我的 eclipse 项目。这是正确的方法吗？
我做过的事情：
- 将 Spark-network-common 编译级别更新为 1.6，因为不知何故编译级别设置为 1.4，并且我收到了 Java 泛型错误。
eclipse.buildId=3.0.3-20140327-1716-Typesafe
java.version=1.8.0_05
java.vendor=Oracle Corporation
BootLoader constants: OS=macosx, ARCH=x86_64, WS=cocoa, NL=en_US
Framework arguments: -keyring /Users/rajivabraham/.eclipse_keyring -showlocation
Command-line arguments: -os macosx -ws cocoa -arch x86_64 -keyring /Users/rajivabraham/.eclipse_keyring -showlocation
Error
Thu Nov 27 07:52:19 EST 2014
Error in Scala compiler
java.lang.AssertionError: assertion failed: TransportConf
at scala.reflect.internal.Symbols$Symbol.info(Symbols.scala:1212)
at scala.reflect.internal.Symbols$Symbol.baseTypeSeqLength$1(Symbols.scala:1628)
at scala.reflect.internal.Symbols$Symbol.isLess(Symbols.scala:1631)
at scala.reflect.internal.Types$Type.baseTypeIndex(Types.scala:992)
at scala.reflect.internal.Types$CompoundType.baseType(Types.scala:1655)
at scala.reflect.internal.Types$ClassTypeRef$class.baseType(Types.scala:2186)
at scala.reflect.internal.Types$TypeRef$$anon$6.baseType(Types.scala:2544)
at scala.reflect.internal.Types$class.firstTry$1(Types.scala:6043)
at scala.reflect.internal.Types$class.isSubType2(Types.scala:6207)
at scala.reflect.internal.Types$class.isSubType(Types.scala:5816)
at scala.reflect.internal.SymbolTable.isSubType(SymbolTable.scala:13)
at scala.reflect.internal.Types$Type.$less$colon$less(Types.scala:872)
at scala.tools.nsc.typechecker.Typers$Typer.adapt(Typers.scala:1160)
at scala.tools.nsc.typechecker.Typers$Typer.adapt(Typers.scala:1102)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5660)
at scala.tools.nsc.typechecker.Typers$Typer.typedArg(Typers.scala:3042)
at scala.tools.nsc.typechecker.Typers$Typer.loop$1(Typers.scala:3069)
at scala.tools.nsc.typechecker.Typers$Typer.typedArgs(Typers.scala:3074)
at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$handleMonomorphicCall$1(Typers.scala:3354)
at scala.tools.nsc.typechecker.Typers$Typer.doTypedApply(Typers.scala:3398)
at scala.tools.nsc.typechecker.Typers$Typer.normalTypedApply$1(Typers.scala:4627)
at scala.tools.nsc.typechecker.Typers$Typer.typedApply$1(Typers.scala:4659)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5564)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5642)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5721)
at scala.tools.nsc.typechecker.Typers$Typer.computeType(Typers.scala:5808)
at scala.tools.nsc.typechecker.Namers$Namer.assignTypeToTree(Namers.scala:834)
at scala.tools.nsc.typechecker.Namers$Namer.valDefSig(Namers.scala:1315)
at scala.tools.nsc.typechecker.Namers$Namer.getSig$1(Namers.scala:1457)
at scala.tools.nsc.typechecker.Namers$Namer.typeSig(Namers.scala:1466)
at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1$$anonfun$apply$1.apply$mcV$sp(Namers.scala:731)
at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1$$anonfun$apply$1.apply(Namers.scala:730)
at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1$$anonfun$apply$1.apply(Namers.scala:730)
at scala.tools.nsc.typechecker.Namers$Namer.scala$tools$nsc$typechecker$Namers$Namer$$logAndValidate(Namers.scala:1499)
at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1.apply(Namers.scala:730)
at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1.apply(Namers.scala:729)
at scala.tools.nsc.typechecker.Namers$$anon$1.completeImpl(Namers.scala:1614)
at scala.tools.nsc.typechecker.Namers$LockingTypeCompleter$class.complete(Namers.scala:1622)
at scala.tools.nsc.typechecker.Namers$$anon$1.complete(Namers.scala:1612)
at scala.reflect.internal.Symbols$Symbol.info(Symbols.scala:1231)
at scala.reflect.internal.Symbols$Symbol.initialize(Symbols.scala:1374)
at scala.tools.nsc.typechecker.MethodSynthesis$MethodSynth$class.addDerivedTrees(MethodSynthesis.scala:225)
at scala.tools.nsc.typechecker.Namers$Namer.addDerivedTrees(Namers.scala:55)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$32.apply(Typers.scala:1917)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$32.apply(Typers.scala:1917)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$rewrappingWrapperTrees$1.apply(Typers.scala:1856)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$rewrappingWrapperTrees$1.apply(Typers.scala:1853)
at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251)
at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251)
at scala.collection.immutable.List.foreach(List.scala:318)
at scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:251)
at scala.collection.AbstractTraversable.flatMap(Traversable.scala:105)
at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1917)
at scala.tools.nsc.typechecker.Typers$Typer.typedClassDef(Typers.scala:1759)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5583)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5642)
at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedStat$1(Typers.scala:2928)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$61.apply(Typers.scala:3032)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$61.apply(Typers.scala:3032)
at scala.collection.immutable.List.loop$1(List.scala:170)
at scala.collection.immutable.List.mapConserve(List.scala:186)
at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:3032)
at scala.tools.nsc.typechecker.Typers$Typer.typedPackageDef$1(Typers.scala:5301)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5587)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5642)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5704)
at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.apply(Analyzer.scala:99)
at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:464)
at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3$$anonfun$run$1.apply(Analyzer.scala:91)
at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3$$anonfun$run$1.apply(Analyzer.scala:91)
at scala.collection.Iterator$class.foreach(Iterator.scala:727)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.run(Analyzer.scala:91)
at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1583)
at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1557)
at scala.tools.nsc.Global$Run.compileSources(Global.scala:1553)
at scala.tools.nsc.Global$Run.compile(Global.scala:1662)
at xsbt.CachedCompiler0.run(CompilerInterface.scala:123)
at xsbt.CachedCompiler0.run(CompilerInterface.scala:99)
at xsbt.CompilerInterface.run(CompilerInterface.scala:27)
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:483)
at sbt.compiler.AnalyzingCompiler.call(AnalyzingCompiler.scala:102)
at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:48)
at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:41)
at sbt.compiler.AggressiveCompile$$anonfun$3$$anonfun$compileScala$1$1.apply$mcV$sp(AggressiveCompile.scala:99)
at sbt.compiler.AggressiveCompile$$anonfun$3$$anonfun$compileScala$1$1.apply(AggressiveCompile.scala:99)
at sbt.compiler.AggressiveCompile$$anonfun$3$$anonfun$compileScala$1$1.apply(AggressiveCompile.scala:99)
at sbt.compiler.AggressiveCompile.sbt$compiler$AggressiveCompile$$timed(AggressiveCompile.scala:166)
at sbt.compiler.AggressiveCompile$$anonfun$3.compileScala$1(AggressiveCompile.scala:98)
at sbt.compiler.AggressiveCompile$$anonfun$3.apply(AggressiveCompile.scala:143)
at sbt.compiler.AggressiveCompile$$anonfun$3.apply(AggressiveCompile.scala:87)
at sbt.inc.IncrementalCompile$$anonfun$doCompile$1.apply(Compile.scala:39)
at sbt.inc.IncrementalCompile$$anonfun$doCompile$1.apply(Compile.scala:37)
at sbt.inc.IncrementalCommon.cycle(Incremental.scala:99)
at sbt.inc.Incremental$$anonfun$1.apply(Incremental.scala:38)
at sbt.inc.Incremental$$anonfun$1.apply(Incremental.scala:37)
at sbt.inc.Incremental$.manageClassfiles(Incremental.scala:65)
at sbt.inc.Incremental$.compile(Incremental.scala:37)
at sbt.inc.IncrementalCompile$.apply(Compile.scala:27)
at sbt.compiler.AggressiveCompile.compile2(AggressiveCompile.scala:157)
at sbt.compiler.AggressiveCompile.compile1(AggressiveCompile.scala:71)
at sbt.compiler.AggressiveCompile.apply(AggressiveCompile.scala:46)
at sbt.compiler.IC$.compile(IncrementalCompiler.scala:22)
at scala.tools.eclipse.buildmanager.sbtintegration.EclipseSbtBuildManager.runCompiler(EclipseSbtBuildManager.scala:133)
at scala.tools.eclipse.buildmanager.sbtintegration.EclipseSbtBuildManager.update(EclipseSbtBuildManager.scala:124)
at scala.tools.eclipse.buildmanager.sbtintegration.EclipseSbtBuildManager.build(EclipseSbtBuildManager.scala:178)
at scala.tools.eclipse.ScalaProject.build(ScalaProject.scala:666)
at scala.tools.eclipse.ScalaBuilder.build(ScalaBuilder.scala:119)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:733)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
at org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:514)
at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:423)
at org.eclipse.jdt.internal.ui.util.CoreUtility$BuildJob.run(CoreUtility.java:162)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
执行 mvn clean 修复了上述错误。我之前用mvn做过构建，然后也用了sbt。
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