Hi jboss guys, We are been more and more to suffer about the Impossibility to override log4j.jar in jboss 4.2 version. The classloading isolation configuration that is explained in the wiki is not working at all. Jboss still complain when we put log4j.jar in our appllications librairies. Can you please,please,please give to us a real solution to get rif of this problem. Removing log4j.jar from our librairies is not a solution. here is the well known exption trace: | log4j:ERROR A "org.jboss.logging.appender.FileAppender" object is not assignable to a "org.apache.log4j.Appender" variable. | log4j:ERROR The class "org.apache.log4j.Appender" was loaded by | log4j:ERROR [WebappClassLoader | delegate: false | repositories: | /WEB-INF/classes/ | ----------> Parent Classloader: | java.net.FactoryURLClassLoader@18c10af | ] whereas object of type | log4j:ERROR "org.jboss.logging.appender.FileAppender" was loaded by [org.jboss.system.server.NoAnnotationURLClassLoader@1a33d48]. | log4j:ERROR Could not instantiate appender named "FILE". | Any help is greetly appreciated. Meisssa View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4058630#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...