[jboss-user] [Installation, Configuration & Deployment] - JAXB: java.lang.LinkageError when linking javax.xml.namespac

In my ear archive, I switched parent delegation to false, because JBoss would load the wrong JAXB classes otherwise (from the server/lib folder instead from the jars given in the ear). Now, the correct JAXB classes are loaded, but there is a new kind of problem: When I try a | JAXBContext jaxbContext = JAXBContext.newInstance("com.foobar.item"); | (which is using the javax.xml.namespace.QName to create a binding between XML and Java) I get the following error: | javax.ejb.EJBTransactionRolledbackException: java.lang.RuntimeException: java.lang.LinkageError: loader constraints violated when linking javax/xml/namespace/QName class | On the following sites the same problem is described: http://www.mail-archive.com/jboss-user@lists.sourceforge.net/msg22483.html http://mail-archive.objectweb.org/oscar/2005-07/msg00055.html http://mail-archives.apache.org/mod_mbox/maven-issues/200603.mbox/%3C1224... What is the most "straightforward" way to solve this issue on a JBoss 4.0.4 AS? Removing the QName class from standard-jars does not seem to be very elegant, neither does copying the QName class in every bundle using it. I read http://www.jboss.org/wiki/Wiki.jsp?page=ClassLoadingConfiguration http://www.jboss.org/wiki/Wiki.jsp?page=JBossClassLoadingUseCases http://wiki.jboss.org/wiki/Wiki.jsp?page=ClassCastExceptions and http://docs.jboss.org/jbossas/jboss4guide/r1/html/ch2.chapter.html#d0e2311 and I think I understand the root cause of the problem (the QName class being loaded by two different class loaders). Nevertheless, I cannot solve the problem. Any help would be appreciated. DerJohannes View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3993083#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...