Spring SOAP - Could not handle mustUnderstand headers

Question

Guys,
Please check this... I'm getting Could not handle mustUnderstand headers when doing a transaction. What am I missing here? Please help. Thanks.
spring-ws-servlet.xml
<beans>
     <bean id="mm7Resp" class="org.springframework.ws.wsdl.wsdl11.DefaultWsdl11Definition">
       <property name="schema" ref="schema"/>
       <property name="portTypeName" value="MM7Resp"/>
       <property name="locationUri" value="http://localhost:8080/mm7Incoming/"/>
       <property name="targetNamespace" value="http://geocoderus.abc.com/schemas" />
     </bean>
     <bean id="schema" class="org.springframework.xml.xsd.SimpleXsdSchema">
         <property name="xsd" value="/WEB-INF/xsd/Orders.xsd"/>
     </bean>
    <bean id="connectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
        <property name="brokerURL" value="vm://localhost?broker.persistent=false"/>
    </bean>
    <bean id="messageFactory" class="org.springframework.ws.soap.saaj.SaajSoapMessageFactory">
         <property name="messageFactory">
               <bean class="com.sun.xml.messaging.saaj.soap.ver1_1.SOAPMessageFactory1_1Impl"></bean>
          </property>
     </bean>
    <bean id="MM7Endpoint" class="com.smart.mms.endpoint.MM7Endpoint">
    </bean>
    <bean id="endpointMapping" class="org.springframework.ws.server.endpoint.mapping.PayloadRootQNameEndpointMapping">
        <property name="mappings">
            <props>
                <prop key="{http://www.3gpp.org/ftp/Specs/archive/23_series/23.140/schema/REL-6-MM7-1-4}DeliverReq">MM7Endpoint</prop>
            </props>
        </property>
        <property name="interceptors">
            <list>
                <ref bean="loggingInterceptor"/>
            </list>
        </property>
    </bean>
    <bean id="loggingInterceptor" class="org.springframework.ws.server.endpoint.interceptor.PayloadLoggingInterceptor"/>
</beans>SOAP Message
<?xml version="1.0" encoding="utf-8" ?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header>
     <mm7:TransactionID xmlns:mm7="http://www.3gpp.org/ftp/Specs/archive/23_series/23.140/schema/REL-6-MM7-1-4" SOAP-ENV:mustUnderstand="1">90cb140a7e67fde6</mm7:TransactionID>
</SOAP-ENV:Header>
<SOAP-ENV:Body>
     <mm7:DeliverReq xmlns:mm7="http://www.3gpp.org/ftp/Specs/archive/23_series/23.140/schema/REL-6-MM7-1-4">
          <mm7:MM7Version>6.8.0</mm7:MM7Version>
          <mm7:MMSRelayServerID/>
          <mm7:Sender>
               <mm7:Number>123456789</mm7:Number>
          </mm7:Sender>
          <mm7:Recipients>
               <mm7:To>
                    <mm7:ShortCode>TO</mm7:ShortCode>
               </mm7:To>
               </mm7:Recipients>
          <mm7:Priority>Normal</mm7:Priority>
          <mm7:Subject>Testing</mm7:Subject>
     </mm7:DeliverReq>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>Logs
06/23/09 20:50:49.896 mapping.PayloadRootQNameEndpointMapping [DEBUG] Looking up endpoint for [{http://www.3gpp.org/ftp/Specs/archive/23_series/23.140/schema/REL-6-MM7-1-4}DeliverReq]
06/23/09 20:50:49.896 server.SoapMessageDispatcher [DEBUG] Endpoint mapping [org.springframework.ws.server.endpoint.mapping.PayloadRootQNameEndpointMapping@3ed19cdf] maps request to endpoint [com.smart.mms.endpoint.MM7Endpoint@7953113d]
06/23/09 20:50:49.896 server.SoapMessageDispatcher [DEBUG] Handling MustUnderstand header {http://www.3gpp.org/ftp/Specs/archive/23_series/23.140/schema/REL-6-MM7-1-4}TransactionID
06/23/09 20:50:49.897 server.SoapMessageDispatcher [WARN ] Could not handle mustUnderstand headers: {http://www.3gpp.org/ftp/Specs/archive/23_series/23.140/schema/REL-6-MM7-1-4}TransactionID. Returning fault

Answer 1

Aren't they called interceptors in Spring (which is what I'm guessing you're using)?
The basic problem is the same, no matter what particular SOAP implementation you have at the end. A mustUnderstand header which has nothing at the server to handle it must throw an error. So I'd read through the Spring docs and see what needs to be done to wire up an interceptor to do the job needed. That's assuming the flag's set correctly, of course.