Problem with JAXB when upgrading to JBoss 4.2.2

[ssinger]

I'm having a problem and I am ripping my hair out trying to resolve!

We have an application that uses JSXB to marshall XML objects. We're using "jaxb-rt-1.0-ea.jar" and we include the JAR file in the application and in the CLASSPATH. Works perfectly in 4.0.4.

I'm trying to get the application up in 4.2.2GA, and I get the following error:

java.lang.NoSuchFieldError: INITIAL_COLOR
javax.xml.bind.ValidatableObject.(ValidatableObject.java:32)
javax.xml.bind.MarshallableObject.(MarshallableObject.java:54)
javax.xml.bind.MarshallableRootElement.(MarshallableRootElement.java:97)

This type of thing almost always happens when there is a mismatch between the classes it is compiled against as opposed to run against. However, I checked, and these classes exist only in "jaxb-rt-1.0-ea.jar" and nowhere else within JBoss. "jaxb-rt-1.0-ea.jar" is still inthe application, and in the CLASSPATH.

Anybody have any idea what might be happening? Hopefully, it's just something dumb I'm doing.

[ssinger]

Follow up -- I believe the problem is that JBoss 4.2.2 is now using a later version of Jaxb as part of the new web server implementation. Unfortunately, the new Jax bas rewritten almost the entire codeset, except for one or two classes that they completely rewrote, but kept the same name. One of these is what is causing my problem.

It would be quite an effort for us to rewrite the Jaxb things just to be able to go to 4.2.2 of JBoss; is there some way to poerhaps just go back to using the Tomcat web server so this isn't an issue?

[jaikiran]

You are running into typical classloader issues. You can configure your application to have scoped classloading. See these for more details

http://wiki.jboss.org/wiki/JBossClassLoadingUseCases

http://wiki.jboss.org/wiki/ClassLoadingConfiguration