JBoss WS has a problem the XMLGregorianCalendar, when it generates back the WSDL from Java objects, I get xsd:anySimpleType instead of xsd:dateTime. I found a workaround (maybe not the best solution), I customized the JAXB binding to avoid the XMLGregorianCalendar: <?xml version="1.0" encoding="utf-8"?> | <bindings | xmlns="http://java.sun.com/xml/ns/jaxb" | xmlns:xsd="http://www.w3.org/2001/XMLSchema" | version="2.0"> | <globalBindings> | <javaType name="java.util.Calendar" xmlType="xsd:dateTime" | parseMethod="javax.xml.bind.DatatypeConverter.parseDateTime" | printMethod="javax.xml.bind.DatatypeConverter.printDateTime"/> | <javaType name="java.util.Calendar" xmlType="xsd:date" | parseMethod="javax.xml.bind.DatatypeConverter.parseDate" | printMethod="javax.xml.bind.DatatypeConverter.printDate"/> | <javaType name="java.util.Calendar" xmlType="xsd:time" | parseMethod="javax.xml.bind.DatatypeConverter.parseTime" | printMethod="javax.xml.bind.DatatypeConverter.printTime"/> | </globalBindings> | </binding> | With this, I get Calendar instead of an XMLGregorianCalendar. However I still have the "Cannot close output stream" error from the RequestHandlerImpl. This is not related to the date/time problem. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4141640#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...