I found the solution on my own...

Actually this is a tapestry bug:
http://issues.apache.org/jira/browse/TAPESTRY-647


> --- Ursprüngliche Nachricht ---
> Von: [EMAIL PROTECTED]
> An: [email protected]
> Betreff: returning ILink in listener causes redirect exception
> Datum: Tue, 20 Sep 2005 12:18:55 +0200 (MEST)
> 
> 
> Hi java-dudes :-)
> 
> my login page listener is declared like this:
> 
>  public ILink login()
>  {
>    // authenticate
>    // if failed:
>    return null;
>    // if ok:
>    return redirect(targetPageName); // causes problem!
>  }
> 
>  @InjectObject("engine-object:page)
>  public abstract IEngineService getPageService();
> 
>  private ILink redirect(String pageName)
>  {
>    return getPageService().getLink(getRequestCycle(), false, pageName);
>  }
> 
> Even though the generated ILink looks ok and the target page exists 
> I get an exception screen:
> 
>   >> org.apache.tapestry.RedirectException <<
> 
> This makes no sense to me...
> 
> http://jakarta.apache.org/tapestry/UsersGuide/listenermethods.html
> 
> the listener is invoked inside a form like this:
> 
>  <form jwcid="@Form" success="listener:login">
>   ....
>  </form>
> 
> Any clue / hint / advice / tip / comment is greatly appreciated! :-))
> 
> Could this possibly be a bug?
> 
> Best regards
> Peter
> 
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