title: CompilerMojo#execute() caused a linkage error (java.lang.NoSuchMethodError) and may be out-of-date
body: <p>I've searched google and reviewed answers on StackOverflow, but cannot seem to resolve this problem. I recently joined this project and added a few things to the POM. Being a relative neophyte with Maven, I am not grasping the issue and the response I have seen have not been clarifying. I suspect it is the addition of Groovy to the project. I want to use Groovy &amp; Spock for testing (and, hopefully, eventually for prod as well).</p>
  
  <pre><code>[INFO] Using Groovy-Eclipse compiler to compile both Java and Groovy files
  [FATAL ERROR] org.apache.maven.plugin.CompilerMojo#execute() caused a linkage error (java.lang.NoSuchMethodError) and may be out-of-date. Check the realms:
  [FATAL ERROR] Plugin realm = app0.child-container[org.apache.maven.plugins:maven-compiler-plugin:2.0.2]
  urls[0] = file:/C:/Users/bill.turner/.m2/repository/org/apache/maven/plugins/maven-compiler-plugin/2.0.2/maven-compiler-plugin-2.0.2.jar
  urls[1] = file:/C:/Users/bill.turner/.m2/repository/org/codehaus/groovy/groovy-eclipse-compiler/2.7.0-01/groovy-eclipse-compiler-2.7.0-01.jar
  urls[2] = file:/C:/Users/bill.turner/.m2/repository/org/codehaus/groovy/groovy-eclipse-batch/2.0.4-02/groovy-eclipse-batch-2.0.4-02.jar
  urls[3] = file:/C:/Users/bill.turner/.m2/repository/org/codehaus/plexus/plexus-compiler-api/1.5.3/plexus-compiler-api-1.5.3.jar
  urls[4] = file:/C:/Users/bill.turner/.m2/repository/org/codehaus/plexus/plexus-utils/1.0.4/plexus-utils-1.0.4.jar
  urls[5] = file:/C:/Users/bill.turner/.m2/repository/org/codehaus/plexus/plexus-compiler-manager/1.5.3/plexus-compiler-manager-1.5.3.jar
  urls[6] = file:/C:/Users/bill.turner/.m2/repository/org/codehaus/plexus/plexus-compiler-javac/1.5.3/plexus-compiler-javac-1.5.3.jar
  [FATAL ERROR] Container realm = plexus.core
  urls[0] = file:/C:/Users/bill.turner/apache-maven-2.2.1/lib/maven-2.2.1-uber.jar
  [INFO] ------------------------------------------------------------------------
  [ERROR] FATAL ERROR
  [INFO] ------------------------------------------------------------------------
  [INFO] org.codehaus.plexus.compiler.CompilerConfiguration.getDebugLevel()Ljava/lang/String;
  [INFO] ------------------------------------------------------------------------
  [INFO] Trace
  java.lang.NoSuchMethodError: org.codehaus.plexus.compiler.CompilerConfiguration.getDebugLevel()Ljava/lang/String;
      at org.codehaus.groovy.eclipse.compiler.GroovyEclipseCompiler.createCommandLine(GroovyEclipseCompiler.java:343)
      at org.codehaus.groovy.eclipse.compiler.GroovyEclipseCompiler.compile(GroovyEclipseCompiler.java:218)
      at org.apache.maven.plugin.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:493)
      at org.apache.maven.plugin.CompilerMojo.execute(CompilerMojo.java:114)
      at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
      at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
      at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556)
      at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535)
      at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
      at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
      at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
      at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
      at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
      at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
      at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:597)
      at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
      at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
      at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
      at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
  </code></pre>