Hello, I'm trying to set up a simple configuration with different log files used depending on the logger name. Not wanting to use Joran, because this is a quite frequently accessed log, I tried to set up a custom logback filter for my Maven2/jetty7/JDK 1.6/logback-0.9.21 project. I added <filter class="de.mycorp.LoggerNameFilter" /> to my logback.xml, whereas de.mycorp is the package where all my other classes reside. LoggerNameFilter.java: [..] public class LoggerNameFilter extends Filter<ILoggingEvent> { @Override public FilterReply decide(ILoggingEvent event) { if (event.getLoggerName().equals("chat-message")) { return FilterReply.ACCEPT; } else { return FilterReply.DENY; } } } Unfortunately Maven throws an error: -ERROR in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Could not create component [filter] of type [de.mycorp.LoggerNameFilter] java.lang.ClassNotFoundException: de.mycorp.LoggerNameFilter at java.lang.ClassNotFoundException: de.mycorp.LoggerNameFilter at at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at at java.security.AccessController.doPrivileged(Native Method) at at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at at org.codehaus.classworlds.RealmClassLoader.loadClassDirect(RealmClassLoader.java:195) at at org.codehaus.classworlds.DefaultClassRealm.loadClass(DefaultClassRealm.java:255) at at org.codehaus.classworlds.DefaultClassRealm.loadClass(DefaultClassRealm.java:274) at at org.codehaus.classworlds.RealmClassLoader.loadClass(RealmClassLoader.java:214) at at java.lang.ClassLoader.loadClass(ClassLoader.java:248) at at ch.qos.logback.core.util.Loader.loadClass(Loader.java:110) Maybe there's even a better approach to this? Thanks a lot! Kind regards, Florian Neumeyer