Netbeans + VRaptor + GlassFish

Pessoal, estou tentando rodar um JSP e está dando o seguinte erro:

HTTP Status 500 -


type Exception report

message

descriptionThe server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: PWC1243: Filter execution threw an exception
root cause

com.sun.enterprise.container.common.spi.util.InjectionException: Error creating managed object for class br.com.caelum.vraptor.VRaptor
root cause

com.google.common.collect.ComputationException: java.lang.NoClassDefFoundError: Lorg/slf4j/Logger;
root cause

java.lang.NoClassDefFoundError: Lorg/slf4j/Logger;
root cause

java.lang.ClassNotFoundException: org.slf4j.Logger
note The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 3.0.1 logs.


Alguém sabe qual é o pepino?

Logo qdo vou subir o Glassfish no netbeans aparece o seguinte erro:

INFO: Virtual server server loaded system default web module
SEVERE: Class [ Lorg/slf4j/Logger; ] not found. Error while loading [ class br.com.caelum.vraptor.validator.MessageInterpolatorFactory ]
WARNING: Error in annotation processing: java.lang.NoClassDefFoundError: Lorg/slf4j/Logger;
SEVERE: Class [ Lorg/slf4j/Logger; ] not found. Error while loading [ class br.com.caelum.vraptor.validator.MessageInterpolatorFactory ]
WARNING: Error in annotation processing: java.lang.NoClassDefFoundError: Lorg/slf4j/Logger;
INFO: WELD-000900 1.0.1 (SP3)

Acredito que seja o mesmo erro.