ClassNotFoundException: org.jaxen.JaxenException in ear file

I'm baffled by what is going on here. I keep getting the following exception:

Caused by: java.lang.ClassNotFoundException: org.jaxen.JaxenException
        at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
        ... 51 more

Yet, this class file IS in my ear and also on the 'Class-Path' attribute of both my ejb's manifest and my ear's manifest file. Is there somewhere else I need to add the jaxen jar to have it be seen by other jar's in the ear? Do all jar's in a ear share the same classpath?

EDIT #1

There is this too:

Caused by: java.lang.NoClassDefFoundError: org/jaxen/JaxenException
        at org.dom4j.DocumentFactory.createXPath(DocumentFactory.java:230)
        at org.dom4j.tree.AbstractNode.createXPath(AbstractNode.java:207)
        at org.dom4j.tree.AbstractNode.selectNodes(AbstractNode.java:164)

EDIT #开发者_运维技巧2

I am deploying to glassfish v3.1 and the lib jars are at the root of the ear file, like so:

-foo.ear
--\META-INF
--lib1.jar
--lib2.jar
--jaxen-1.1.1.jar

EDIT #3

I have tried deploying to another version of GF and it appears to work, I think it might be a bug in the version I'm using. I've opened a forum thread here.

EDIT #4

I had dom4j in the app server lib directory but not jaxen on the server. Adding the jaxen lib fixed this.

you need the jaxen jar in your servers lib folder

http://jaxen.codehaus.org/releases.html

Any jars that are in the lib/ directory of your EAR will automatically be loaded.

Another example is the common task of bundling a number of library JAR files with an application. By default, the lib directory under the application root is reserved for library files. Previously, you had to add a manifest entry to the application module, which could be a tedious task.

Source