why I cant find this service

[Mu Mike]

This is my report.roles file

<?xml version="1.0"?>
<role-list>
 <role
   name="Runner"
   shorthand="runner"
   default-class="DefaultRunner"/>  
</role-list>

This is my system.xconf file

<my-system>
 <runner/>
</my-system>
And this is my main class file

public class TestFortress{

 public static void main( String[] args )
       throws Exception
 {
   final FortressConfig config = new FortressConfig();

   config.setContextDirectory("");
   config.setWorkDirectory("");
   config.setContainerConfiguration("system.xconf" );
   config.setRoleManagerConfiguration("report.roles");
   //config.setLoggerManagerConfiguration("logkit.xconf");
   ContainerManager cm = new
             DefaultContainerManager(config.getContext());
   
   ContainerUtil.initialize( cm );

   DefaultContainer container = (DefaultContainer) cm.getContainer();

   ServiceManager manager = container.getServiceManager();

   Runner service = (Runner) manager.lookup(Runner.ROLE);

   System.out.println(service.getName());

   container.getServiceManager().release(service);
   org.apache.avalon.framework.container.ContainerUtil.dispose( cm );
 }
}
This is Runner.java

public interface Runner {
   public static final String ROLE="Runner";
   public String getName();
}
This is DefaultRunner.java

public class DefaultRunner implements Runner {
   public String getName()
   {
      return ROLE;
   }
}
Below is the jar files I used

avalon-framework-4.1.5.jar
commons-collections-2.1.jar
crimson.jar
excalibur-fortress-complete-1.0.jar
excalibur-lifecycle-1.0.jar
excalibur-util-concurrent-1.3.1.jar
logkit-1.2.jar
xalan.jar
xerces.jar
when I ran the main class,there was an exception:

org.apache.avalon.framework.service.ServiceException: Unable to provide 
implementation for Runner (Key='Runner')
	at 
org.apache.avalon.framework.service.DefaultServiceManager.lookup(DefaultServiceManager.java:117)

	at 
org.apache.avalon.fortress.util.ContextManager$EAServiceManager.lookup(ContextManager.java:1042)

	at 
org.apache.avalon.fortress.impl.lookup.FortressServiceManager.lookup(FortressServiceManager.java:106)

	at TestFortress.main(TestFortress.java:33)



and when I debug the code and ran to breakpoint at  Runner service = 
(Runner) manager.lookup(Runner.ROLE); it kept throwing out this exception

java.lang.AbstractMethodError: 
org/apache/excalibur/event/impl/AbstractQueue.enqueue
	at 
org.apache.excalibur.event.command.AbstractThreadManager$PipelineRunner.run(AbstractThreadManager.java:310)

	at 
EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:727)

	at java.lang.Thread.run(Thread.java:484)

so what happened to the code? anything is wrong with my code?

Thanks
Mike
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