title: Class Not Found exception with exec-maven-plugin when run on Linux
body: <p>I am trying to run TestNG tests. My Project organization is - src->test->java->com->shn->library
  The below command works well in Windows but fails in Linux.</p>
  
  <pre><code>mvn -X clean exec:java -Dexec.mainClass="com.shn.library.RunSuitesInParallel" -Dexec.classpathScope=test -e
  </code></pre>
  
  <p>Error Seen in Linux on running the same command - </p>
  
  <pre><code>[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java (default-cli) on project UAF: An exception occured while executing the Java class. com.shn.library.RunSuitesInParallel -&gt; [Help 1]
  org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java (default-cli) on project UAF: An exception occured while executing the Java class. com.shn.library.RunSuitesInParallel
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217)
          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:320)
          at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
          at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
          at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
          at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
          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:601)
          at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
          at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
          at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
          at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
  Caused by: org.apache.maven.plugin.MojoExecutionException: An exception occured while executing the Java class. com.shn.library.RunSuitesInParallel
          at org.codehaus.mojo.exec.ExecJavaMojo.execute(ExecJavaMojo.java:352)
          at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
          ... 19 more
  Caused by: java.lang.ClassNotFoundException: com.shn.library.RunSuitesInParallel
          at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
          at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
          at java.security.AccessController.doPrivileged(Native Method)
          at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
          at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:285)
          at java.lang.Thread.run(Thread.java:722)
  [ERROR]
  [ERROR]
  [ERROR] For more information about the errors and possible solutions, please read the following articles:
  [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
  </code></pre>