title: java.lang.NoClassDefFoundError: Lorg/sonatype/aether/RepositorySystem;
body: <p>How to fix this error:</p>
  
  <pre><code>[WARNING] Error injecting: com.google.appengine.devappserver.DevAppServerRunner
  java.lang.NoClassDefFoundError: Lorg/sonatype/aether/RepositorySystem;
      at java.lang.Class.getDeclaredFields0(Native Method)
      at java.lang.Class.privateGetDeclaredFields(Class.java:2397)
      at java.lang.Class.getDeclaredFields(Class.java:1806)
      at com.google.inject.spi.InjectionPoint.getInjectionPoints(InjectionPoint.java:661)
      at com.google.inject.spi.InjectionPoint.forInstanceMethodsAndFields(InjectionPoint.java:366)
      at com.google.inject.internal.ConstructorBindingImpl.getInternalDependencies(ConstructorBindingImpl.java:165)
      at com.google.inject.internal.InjectorImpl.getInternalDependencies(InjectorImpl.java:609)
      at com.google.inject.internal.InjectorImpl.cleanup(InjectorImpl.java:565)
      at com.google.inject.internal.InjectorImpl.initializeJitBinding(InjectorImpl.java:551)
      at com.google.inject.internal.InjectorImpl.createJustInTimeBinding(InjectorImpl.java:865)
      at com.google.inject.internal.InjectorImpl.createJustInTimeBindingRecursive(InjectorImpl.java:790)
      at com.google.inject.internal.InjectorImpl.getJustInTimeBinding(InjectorImpl.java:278)
      at com.google.inject.internal.InjectorImpl.getBindingOrThrow(InjectorImpl.java:210)
      at com.google.inject.internal.InjectorImpl.getProviderOrThrow(InjectorImpl.java:986)
      at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:1019)
      at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:982)
      at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1032)
      at org.eclipse.sisu.space.AbstractDeferredClass.get(AbstractDeferredClass.java:48)
      at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:86)
      at com.google.inject.internal.InternalFactoryToInitializableAdapter.provision(InternalFactoryToInitializableAdapter.java:55)
      at com.google.inject.internal.ProviderInternalFactory$1.call(ProviderInternalFactory.java:70)
      at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:100)
      at org.eclipse.sisu.plexus.PlexusLifecycleManager.onProvision(PlexusLifecycleManager.java:133)
      at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:109)
      at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:55)
      at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:68)
      at com.google.inject.internal.InternalFactoryToInitializableAdapter.get(InternalFactoryToInitializableAdapter.java:47)
      at com.google.inject.internal.InjectorImpl$2$1.call(InjectorImpl.java:997)
      at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1047)
      at com.google.inject.internal.InjectorImpl$2.get(InjectorImpl.java:993)
      at com.google.inject.Scopes$1$1.get(Scopes.java:59)
      at org.eclipse.sisu.inject.LazyBeanEntry.getValue(LazyBeanEntry.java:82)
      at org.eclipse.sisu.plexus.LazyPlexusBean.getValue(LazyPlexusBean.java:51)
      at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:260)
      at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:252)
      at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:459)
      at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:97)
      at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
      at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
      at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
      at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
      at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
      at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
      at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
      at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:317)
      at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:152)
      at org.apache.maven.cli.MavenCli.execute(MavenCli.java:555)
      at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:214)
      at org.apache.maven.cli.MavenCli.main(MavenCli.java:158)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:606)
      at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
      at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
      at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
      at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
      at org.codehaus.classworlds.Launcher.main(Launcher.java:46)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:606)
      at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
  Caused by: java.lang.ClassNotFoundException: org.sonatype.aether.RepositorySystem
      at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
      at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:259)
      at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:235)
      at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:227)
      ... 63 more
  </code></pre>
  
  <p><strong>I'm using:</strong></p>
  
  <ul>
  <li>java-1.7.0-openjdk-amd64</li>
  <li>Maven 3.1.1</li>
  <li>Ubuntu 13.04, 64-bit</li>
  </ul>