WebSphere AppServer 4.0.4 og nyeste log4j 1.2.8

Det ser ud som om, at WebSphere's indbyggede tomcat-server er blevet kompileret op imod en ældre version af log4j, men det her ser meget mærkeligt ud:

X Servlet Error: org/apache/log4j/Category: java.lang.Exception: org/apache/log4j/Category
    at sample.ConstructionSiteListService._Result_jsp_0._jspService(_Result_jsp_0.java:677)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:142)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspServlet.java:312)
    at org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java:487)
    at org.apache.jasper.runtime.JspServlet.service(JspServlet.java:620)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at com.ibm.servlet.engine.webapp.StrictServletInstance.doService(ServletManager.java:827)
    at com.ibm.servlet.engine.webapp.StrictLifecycleServlet._service(StrictLifecycleServlet.java:167)
    at com.ibm.servlet.engine.webapp.IdleServletState.service(StrictLifecycleServlet.java:297)
    at com.ibm.servlet.engine.webapp.StrictLifecycleServlet.service(StrictLifecycleServlet.java:110)
    at com.ibm.servlet.engine.webapp.ServletInstance.service(ServletManager.java:472)
    at com.ibm.servlet.engine.webapp.ValidServletReferenceState.dispatch(ServletManager.java:1012)
    at com.ibm.servlet.engine.webapp.ServletInstanceReference.dispatch(ServletManager.java:913)
    at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:678)
    at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:331)
    at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:117)
    at com.ibm.servlet.engine.srt.WebAppInvoker.doForward(WebAppInvoker.java:134)
    at com.ibm.servlet.engine.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:239)
    at com.ibm.servlet.engine.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:67)
    at com.ibm.servlet.engine.invocation.CacheableInvocationContext.invoke(CacheableInvocationContext.java:106)
    at com.ibm.servlet.engine.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:154)
    at com.ibm.servlet.engine.oselistener.OSEListenerDispatcher.service(OSEListener.java:315)
    at com.ibm.servlet.engine.http11.HttpConnection.handleRequest(HttpConnection.java:60)
    at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:323)
    at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:252)
    at com.ibm.ws.util.CachedThread.run(ThreadPool.java:137)

Sidst af alt kan jeg slet ikke finde den fra JSP'en genererede .java fil. Hvis nogen har stødt på samme problem og fandt en løsning er jeg meget interesseret.