Ruben Laguna’s blog

Netbeans & Woodstox: ClassCastException: JAXBContextImpl Cannot Be Cast to JAXBContext

Are you getting a ClassCastException in a Netbeans Platform Application, when you are you sure that the class can be casted? Then check http://wiki.netbeans.org/PlainView.jsp?page=DevFaqModuleCCE. This is most likely the result of the the classes being loaded by different classloaders. So JAXBContextImpl cannot be cast to JAXBContext because that JAXBContext is from Classloader “A” and @JAXBContextImpl @can only be cast to @JAXBContext @from Classloader “B”.

SEVERE [global]
java.lang.ClassCastException: com.sun.xml.bind.v2.runtime.JAXBContextImpl cannot be cast to javax.xml.bind.JAXBContext
        at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:145)
        at javax.xml.bind.ContextFinder.find(ContextFinder.java:277)
        at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:372)
        at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:337)
        at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:244)
        at com.rubenlaguna.en4j.mainmodule.ImportEvernoteFile.actionPerformed(ImportEvernoteFile.java:65)
        at org.openide.awt.AlwaysEnabledAction.actionPerformed(AlwaysEnabledAction.java:115)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.AbstractButton.doClick(AbstractButton.java:389)
        at com.apple.laf.ScreenMenuItem.actionPerformed(ScreenMenuItem.java:95)
        at java.awt.MenuItem.processActionEvent(MenuItem.java:627)
        at java.awt.MenuItem.processEvent(MenuItem.java:586)
        at java.awt.MenuComponent.dispatchEventImpl(MenuComponent.java:317)
        at java.awt.MenuComponent.dispatchEvent(MenuComponent.java:305)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:638)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
[catch] at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
BUILD SUCCESSFUL (total time: 28 minutes 5 seconds)

So this could happen for example if you have both woodstox in a Netbeans Library Wrapper module and you make you application dependent on ide11 ⇒ JAXB 2.1 Library
jaxb21.

In my case I was able to solve by just removing JAXB 2.1 Library from the application.

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