[jboss-user] [Installation, Configuration & Deployment] - Classloading problem while migrating from jboss 4.0.3 to jbo

Hi all, I'v troubles while trying to deploy my application in jboss 4.0.5. I've got the errors belows. log4j:ERROR A "org.jboss.logging.util.OnlyOnceErrorHandler" object is not assignable to a "org.apache.log4j.spi.ErrorHandler" variable. log4j:ERROR The class "org.apache.log4j.spi.ErrorHandler" was loaded by log4j:ERROR [org.jboss.mx.loading.UnifiedClassLoader3@8c048e{ url=file:/D:/Documents/developpements/workspace/nis_portail_ear/deploy/portail_ear.ear/ ,addedOrder=48}] whereas object of type log4j:ERROR "org.jboss.logging.util.OnlyOnceErrorHandler" was loaded by [org.jboss.system.server.NoAnnotationURLClassLoader@1a33d48]. log4j:ERROR Could not create an Appender. Reported error follows. java.lang.ClassCastException: org.jboss.logging.appender.DailyRollingFileAppender The same application is well deployed in jboss 4.0.3 It seems there is a change in jboss classloading beween the two versions. I don't want to remove log4j.jar from my application librairies. Can someone tells how to get rid off this kind of problem. thank in advance. Meissa View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4030706#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...