I'm trying to upgrade from JBoss 4.2.1 to JBoss 6. In JBoss 4.2.1, we are manually deploying our application as an exploded war and everything works beautifully.

I'm running into problems because the application that I am trying to deploy uses versions of 3rd party libraries that are older than the ones that JBoss 6 now includes by default. The result of this is that I'm getting classloader conflicts all over the place and the application won't even start.

At present, I have tried using the JBoss Classloading Documentation as well as the scanty bits of documentation for jboss-classloading.xml and haven't had any success.

Has anyone out there managed to do this successfully? If you have, how did you do it?

I've included a stack trace below in case it offers any useful information.

Caused by: java.lang.Error: Error visiting "/C:/jboss6/server/default/deploy/app.war/WEB-INF/lib/jaxb-xjc-2.1.12.jar/1.0/com/sun/codemodel/JConditional.class"
    at org.jboss.classloading.plugins.vfs.VFSResourceVisitor.visit(VFSResourceVisitor.java:268) [jboss-classloading-vfs.jar:2.2.0.Alpha9]
    at org.jboss.vfs.VirtualFile.visit(VirtualFile.java:407) [jboss-vfs.jar:3.0.0.CR5]
    at org.jboss.vfs.VirtualFile.visit(VirtualFile.java:409) [jboss-vfs.jar:3.0.0.CR5]
    at org.jboss.vfs.VirtualFile.visit(VirtualFile.java:409) [jboss-vfs.jar:3.0.0.CR5]
    at org.jboss.vfs.VirtualFile.visit(VirtualFile.java:409) [jboss-vfs.jar:3.0.0.CR5]
    at org.jboss.vfs.VirtualFile.visit(VirtualFile.java:409) [jboss-vfs.jar:3.0.0.CR5]
    at org.jboss.vfs.VirtualFile.visit(VirtualFile.java:395) [jboss-vfs.jar:3.0.0.CR5]
    at org.jboss.classloading.plugins.vfs.VFSResourceVisitor.visit(VFSResourceVisitor.java:102) [jboss-classloading-vfs.jar:2.2.0.Alpha9]
    at org.jboss.deployers.vfs.plugins.classloader.VFSDeploymentClassLoaderPolicyModule.visit(VFSDeploymentClassLoaderPolicyModule.java:181) [:2.2.0.Alpha8]
    at org.jboss.scanning.plugins.DeploymentUnitScanner.scan(DeploymentUnitScanner.java:111) [:1.0.0.Alpha7]
    at org.jboss.scanning.spi.helpers.UrlScanner.scan(UrlScanner.java:96) [:1.0.0.Alpha7]
    at org.jboss.scanning.deployers.ScanningDeployer.deploy(ScanningDeployer.java:90) [:1.0.0.Alpha7]
    at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:179) [:2.2.0.Alpha8]
    ... 41 more