Sergey,
I also wanted to make a note of something, I am having this problem when running my project from eclipse. I just had something else interesting happen that my lead to a solution: I added these to my JSONProvider config: <property name="marshallAsJaxbElement" value="true"/> <property name="unmarshallAsJaxbElement" value="true" /> And now the writeTo method gets called in JSONProvider, but returns with the following exception after trying to create a Marshaller: JAXBException occurred : ClassCastException: attempting to cast jar:file:/C:/Java/jdk1.7.0_21/jre/lib/rt.jar!/javax/xml/bind/JAXBContext.class to bundleresource://25.fwk1172769370/javax/xml/bind/JAXBContext.class. Please make sure that you are specifying the proper ClassLoader. -- View this message in context: http://cxf.547215.n5.nabble.com/JaxRs-Yet-another-Unmarshall-Marshall-issue-with-CXF-2-7-2-tp5729213p5729235.html Sent from the cxf-user mailing list archive at Nabble.com.
