As per the javadocs of ArrayStoreException: anonymous wrote : Thrown to indicate that an attempt has been made to store the wrong type of object into an array of objects. For example, the following code generates an ArrayStoreException: | | Object x[] = new String[3]; | x[0] = new Integer(0); | You say that it works with JUnit and not from a war deployed in the server. Is this war a different application? How are you applications packaged? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4123028#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...