Der Versuch, sbt unter Ubuntu auszuführen. (Fehler: java.lang.NoClassDefFoundError: scala/ScalaObject)

Question

Ich habe versucht, sbt zu installieren, um Scala Version 2.8 in Ubuntu zu verwenden. (Ich verwende derzeit die Version 2.7.)

Wenn ich sbt vom Terminal betreibe ich folgende Ausgabe:

$ sbt 
Project does not exist, create new project? (y/N/s) y 
Name: HelloWorld 
Organization: org 
Version [1.0]: 
Scala version [2.7.7]: 
sbt version [0.7.4]: 
Getting Scala 2.7.7 ... 
:: retrieving :: org.scala-tools.sbt#boot-scala 
confs: [default] 
2 artifacts copied, 0 already retrieved (6214kB/279ms) 
java.lang.NoClassDefFoundError: scala/ScalaObject 
at java.lang.ClassLoader.defineClass1(Native Method) 
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632) 
at java.lang.ClassLoader.defineClass(ClassLoader.java:616) 
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) 
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) 
at java.net.URLClassLoader.access$000(URLClassLoader.java:58) 
at java.net.URLClassLoader$1.run(URLClassLoader.java:197) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.net.URLClassLoader.findClass(URLClassLoader.java:190) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:307) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:248) 
at java.lang.ClassLoader.defineClass1(Native Method) 
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632) 
at java.lang.ClassLoader.defineClass(ClassLoader.java:616) 
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) 
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) 
at java.net.URLClassLoader.access$000(URLClassLoader.java:58) 
at java.net.URLClassLoader$1.run(URLClassLoader.java:197) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.net.URLClassLoader.findClass(URLClassLoader.java:190) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:307) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:248) 
at java.lang.Class.forName0(Native Method) 
at java.lang.Class.forName(Class.java:247) 
at xsbt.boot.Provider$.classMissing$1(Provider.scala:71) 
at xsbt.boot.Provider$$anonfun$getMissing$1.apply(Provider.scala:72) 
at xsbt.boot.Provider$$anonfun$getMissing$1.apply(Provider.scala:72) 
at scala.List.filter(List.scala:859) 
at xsbt.boot.Provider$.getMissing(Provider.scala:72) 
at xsbt.boot.Provider$initialize.call(Provider.scala:45) 
at xsbt.boot.Provider$initialize.call(Provider.scala:32) 
at xsbt.boot.Locks$GlobalLock.withChannel$1(Locks.scala:63) 
at xsbt.boot.Locks$GlobalLock$$anonfun$withFileLock$1.apply(Locks.scala:67) 
at xsbt.boot.Locks$GlobalLock$$anonfun$withFileLock$1.apply(Locks.scala:67) 
at xsbt.boot.Using$.withResource(Using.scala:11) 
at xsbt.boot.Using$.apply(Using.scala:10) 
at xsbt.boot.Locks$GlobalLock.withFileLock(Locks.scala:67) 
at xsbt.boot.Locks$GlobalLock.liftedTree1$1(Locks.scala:45) 
at xsbt.boot.Locks$GlobalLock.withLock(Locks.scala:45) 
at xsbt.boot.Locks$.apply(Locks.scala:31) 
at xsbt.boot.Provider$class.$init$(Provider.scala:31) 
at xsbt.boot.Launch$ScalaProvider.<init>(Launch.scala:80) 
at xsbt.boot.Launch$$anonfun$1.apply(Launch.scala:72) 
at xsbt.boot.Launch$$anonfun$1.apply(Launch.scala:72) 
at xsbt.boot.Cache.newEntry(Cache.scala:17) 
at xsbt.boot.Cache.getFromReference(Cache.scala:13) 
at xsbt.boot.Cache.apply(Cache.scala:12) 
at xsbt.boot.Launch.getScala(Launch.scala:73) 
at xsbt.boot.Launch$.run(Launch.scala:48) 
at xsbt.boot.Launch$$anonfun$explicit$1.apply(Launch.scala:42) 
at xsbt.boot.Launch$$anonfun$explicit$1.apply(Launch.scala:42) 
at xsbt.boot.Launch$.launch(Launch.scala:57) 
at xsbt.boot.Launch$.explicit(Launch.scala:42) 
at xsbt.boot.Launch$.initialized(Launch.scala:38) 
at xsbt.boot.Launch$.parsed(Launch.scala:31) 
at xsbt.boot.Launch$.configured(Launch.scala:21) 
at xsbt.boot.Launch$.apply(Launch.scala:16) 
at xsbt.boot.Launch$.apply(Launch.scala:13) 
at xsbt.boot.Boot$.runImpl(Boot.scala:24) 
at xsbt.boot.Boot$.run(Boot.scala:19) 
at xsbt.boot.Boot$.main(Boot.scala:15) 
at xsbt.boot.Boot.main(Boot.scala) 
Caused by: java.lang.ClassNotFoundException: scala.ScalaObject 
at java.net.URLClassLoader$1.run(URLClassLoader.java:202) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.net.URLClassLoader.findClass(URLClassLoader.java:190) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:307) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:248) 
... 62 more 
Error during sbt execution: java.lang.NoClassDefFoundError: scala/ScalaObject 

Irgendwelche Ideen, was ich falsch mache?

Answer 1

Dieser Fehler tritt auf, wenn eine falsche Scala Version verwendet wird. Da SBT Scala eigenständig verwaltet, ist mein Vorschlag, dass Sie entfernen Scala-Paket, das Sie möglicherweise installiert haben.

Answer 2

Haben Sie Ihre Umgebungsvariable $SCALA_HOME richtig eingestellt?

sah ich den Conky GUI Ubuntu project having a similar issue (unten auf der Seite, nicht direkt mit sbt, aber mit Scala), und hier ist das Skript sie jetzt, um sicherzustellen, und legen Sie alle Scala bezogenen Variablen verwenden: alle

(The Skript ist wahrscheinlich nicht relevant für Ihre sbt Skript, aber es gibt Ihnen eine Vorstellung über die Einstellung $SCALA_HOME)

#!/bin/bash 

set -e 

#-----------------------------------# 
#    Functions    # 
#-----------------------------------# 

function copy_variables_file { 
    # Copying variables.xml to ~/.conkygui 
    if [ ! -d ~/.conkygui ]; then 
     mkdir -v ~/.conkygui 
    fi 
    cp -vu /usr/share/doc/conkygui/variables.xml ~/.conkygui 
} 

function get_scala_home { 
    # check if $SCALA_HOME is set 
    if [ -z $SCALA_HOME ]; then 
     # try to find it at common locations 
     dists=('Fedora' 'Ubuntu') 
     paths=('/usr/share/scala' '/usr/share/java') 
     for indx in 0 1 
     do 
      SCALA_HOME=${paths[$indx]} 
      if [ -d $SCALA_HOME ]; then 
       break 
      fi 
      SCALA_HOME='' 
     done 
    fi 

    # check if $SCALA_HOME could be found 
    if [ -z $SCALA_HOME ]; then 
     echo '$SCALA_HOME is not set' 
     exit 2 
    else 
     echo $SCALA_HOME 
     return 0 
    fi 
} 

function get_scala_library_path { 
    SCALA_HOME=$1 
    scala_library=$SCALA_HOME'/scala-library.jar' 
    if [ -f $scala_library ] ; then 
     echo $scala_library 
     return 0 
    fi 
    # try with lib folder 
    scala_library=$SCALA_HOME'/lib/scala-library.jar' 
    if [ -f $scala_library ] ; then 
     echo $scala_library 
     return 0 
    else 
     echo 'error: scala-library.jar could not be found'; 
     exit 1 
    fi 
} 

function get_classpath { 
    SCALA_HOME=$1 
    # Except for Scala the required libraries come 
    # with Conky GUI and are located in the "lib" folder. 
    lib_folder='/usr/share/conkygui' 
    bsaf=$lib_folder'/lib/bsaf-1.9-RC3.jar' 
    vldocking=$lib_folder'/lib/vldocking-3.0.0.jar' 
    conkygui=$lib_folder'/conkygui.jar' 
    libs=$bsaf':'$vldocking':'$conkygui 
    scala_library=`get_scala_library_path $SCALA_HOME` 
    classpath=$libs':'$scala_library 
    echo $classpath 
} 

#-------------------------------# 
#    RUN    # 
#-------------------------------# 

copy_variables_file 

SCALA_HOME=`get_scala_home` 
echo 'SCALA_HOME: '$SCALA_HOME 

classpath=`get_classpath $SCALA_HOME` 
echo 'CLASSPATH: '$classpath 

# start Conky GUI 
java -cp $classpath controllers.ConkyGUI 

exit $? 

Answer 3

einen Neustart versuchen sbt nach dem Löschen:

1. ~/.m2/repository
2. ~/.ivy2/cache
3. project/boot

Als