How do I configure JAXB to use Woodstox on JBoss 6?

I'm deploying a Java EE 6 JAX-RS web service on JBoss 6, and I'd like to use Woodstox instead of whatever SAX/StAX parser is currently being used. Since some stack traces list classes in (among other packages):

• org.apache.xerces.parsers
• org.apache.xerces.impl
• org.apache.xerces.jaxp

...I'm guessing that it's using Xerces.

I've tried adding 开发者_JAVA技巧the necessary JARs (woodstox-core-asl-4.1.1.jar and stax2-api-3.1.1.jar) into the EAR (deployed in /lib directory) and also in the WAR (in WEB-INF/lib) but this didn't seem to affect anything, as stack traces from exceptions in XML parsing still reference Xerces packages.

I've already read this question but I think that I've already tried the "add it to your classpath" option as above. I've also already tried adding the following VM args as per this thread:

-Djavax.xml.stream.XMLInputFactory=com.ctc.wstx.stax.WstxInputFactory
-Djavax.xml.stream.XMLOutputFactory=com.ctc.wstx.stax.WstxOutputFactory
-Djavax.xml.stream.XMLEventFactory=com.ctc.wstx.stax.WstxEventFactory
-Dcom.sun.xml.ws.api.streaming.XMLStreamReaderFactory.woodstox=true
-Dcom.sun.xml.ws.api.streaming.XMLStreamWriterFactory.woodstox=true

What am I doing wrong? How do I get JAXB to use Woodstox instead of (I think) Xerces?

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When EclipseLink JAXB (MOXy) creates an XMLStreamReader it does so using the standard APIs, so it should get the one appropriate to your environment:

xmlInputFactory = XMLInputFactory.newInstance();
XMLStreamReader xmlStreamReader = xmlInputFactory.createXMLStreamReader(reader);

With that being said, that presupposes that the JBoss JAX-RS implemenation is calling a MOXy code path that allows it to create its own XMLStreamReader (such as unmarshalling an InputStream), and not passing it an actual XMLStreamReader (of JBoss's choosing).