Thread: Client received SOAP Fault from server: java.lang.NullPointerException

I'm writing my first JAX-WS Web Service. When I'm running my Remote Web Service Client code, I receive the next error:

Exception in thread "main" com.sun.xml.internal.ws.fault.ServerSOAPFaultExcep tion: Client received SOAP Fault from server:
java.lang.NullPointerException Please see the server log to find more detail regarding exact cause of the failure. at
com.sun.xml.internal.ws.fault.SOAP11Fault.getProto colExcepti on(SOAP11Fault.java:178) at
com.sun.xml.internal.ws.fault.SOAPFaultBuilder.cre ateExcepti on(SOAPFaultBuilder.java:116) at
com.sun.xml.internal.ws.client.sei.StubHandler.rea dResponse( StubHandler.java:238) at
com.sun.xml.internal.ws.db.DatabindingImpl.deseria lizeRespon se(DatabindingImpl.java:189) at
com.sun.xml.internal.ws.db.DatabindingImpl.deseria lizeRespon se(DatabindingImpl.java:276) at
com.sun.xml.internal.ws.client.sei.SyncMethodHandl er.invoke( SyncMethodHandler.java:104) at
com.sun.xml.internal.ws.client.sei.SyncMethodHandl er.invoke( SyncMethodHandler.java:77) at
com.sun.xml.internal.ws.client.sei.SEIStub.invoke( SEIStub.ja va:147) at com.sun.proxy.$Proxy40.getShoes(Unknown Source) at
org.example.shoesshop.client.ShoesServiceClient.ma in(ShoesServiceClient.java:32)

Here's the code of Remote Web Service Client:

public class ShoesServiceClient {
 
    public static void main(String[] args) throws MalformedURLException, ShoesNotFound_Exception{
        System.setProperty("com. sun. xml. ws. transport. http. client. HttpTransportPipe. dump", "true");
        System.setProperty("com. sun. xml. internal. ws. transport. http. client. HttpTransportPipe. dump", "true");
 
        URL wsdl = new URL("file:///" + new File("").getAbsolutePath() + "/shoesservice.wsdl");
 
        ShoesServiceImpl service = new ShoesService(wsdl).getShoesPort();
        service.getShoes(1); // ShoesServiceClient.java:32 is here
    }
}

Also sharing the code of Web Service Publisher

public class ShoesServicePublisher {
    public static void main(String[] args) {
        final String addr = "localhost: 8080 /shoesservice"; //with http
        final Object impl = new ShoesServiceImpl();
        Endpoint shoesPub = Endpoint.publish(addr, impl);
        Scanner sc = new Scanner(System.in);
        sc.nextLine();
        sc.close();
        shoesPub.stop();
    }
}

I use TCP/IP monitor to intercept messages (localhost: 18080 /shoesservice)
The wsdl-file has the next structure (it is stored on my project folder)

<definitions>
<types>
<xsd:schema>
<xsd:import namespace="example. org /ShoesShop" schemaLocation="localhost: 8080 /shoesservice?xsd=1"></xsd:import>
</xsd:schema>
<xsd:schema>
<xsd:import namespace="shoeshop. example /jaxws/shoes" schemaLocation="localhost: 8080 /shoesservice?xsd=2"></xsd:import>
</xsd:schema>
</types>
<message name="getShoes">
<part name="parameters" element="tns:getShoes"></part>
</message>
<message name="getShoesResponse">
<part name="parameters" element="tns:getShoesResponse"></part>
</message>
<message name="ShoesNotFound">
<part name="fault" element="tns:ShoesNotFound"></part>
</message>
<message name="getAllShoes">
<part name="parameters" element="tns:getAllShoes"></part>
</message>
<message name="getAllShoesResponse">
<part name="parameters" element="tns:getAllShoesResponse"></part>
</message>
<message name="updateShoes">
<part name="parameters" element="tns:updateShoes"></part>
</message>
<message name="updateShoesResponse">
<part name="parameters" element="tns:updateShoesResponse"></part>
</message>
<message name="addShoes">
<part name="parameters" element="tns:addShoes"></part>
</message>
<message name="addShoesResponse">
<part name="parameters" element="tns:addShoesResponse"></part>
</message>
<message name="ShoesAlreadyExists">
<part name="fault" element="tns:ShoesAlreadyExists"></part>
</message>
<message name="deleteShoes">
<part name="parameters" element="tns:deleteShoes"></part>
</message>
<message name="deleteShoesResponse">
<part name="parameters" element="tns:deleteShoesResponse"></part>
</message>
<message name="countShoes">
<part name="parameters" element="tns:countShoes"></part>
</message>
<message name="countShoesResponse">
<part name="parameters" element="tns:countShoesResponse"></part>
</message>
<portType name="ShoesServiceImpl">
<operation name="getShoes">
<input wsam:Action="shoeshop. example /jaxws/shoes/ShoesServiceImpl/getShoesRequest" message="tns:getShoes"></input>
<output wsam:Action="shoeshop. example /jaxws/shoes/ShoesServiceImpl/getShoesResponse" message="tns:getShoesResponse"></output>
<fault message="tns:ShoesNotFound" name="ShoesNotFound" wsam:Action="shoeshop.example/jaxws/shoes/ShoesServiceImpl/getShoes/Fault/ShoesNotFound"></fault>
</operation>
<operation name="getAllShoes">
<input wsam:Action="shoeshop. example /jaxws/shoes/ShoesServiceImpl/getAllShoesRequest" message="tns:getAllShoes"></input>
<output wsam:Action="shoeshop. example /jaxws/shoes/ShoesServiceImpl/getAllShoesResponse" message="tns:getAllShoesResponse"></output>
</operation>
<operation name="updateShoes">
<input wsam:Action="shoeshop. example /jaxws/shoes/ShoesServiceImpl/updateShoesRequest" message="tns:updateShoes"></input>
<output wsam:Action="shoeshop. example /jaxws/shoes/ShoesServiceImpl/updateShoesResponse" message="tns:updateShoesResponse"></output>
<fault message="tns:ShoesNotFound" name="ShoesNotFound" wsam:Action="shoeshop.example/jaxws/shoes/ShoesServiceImpl/updateShoes/Fault/ShoesNotFound"></fault>
</operation>
<operation name="addShoes">
<input wsam:Action="shoeshop. example /jaxws/shoes/ShoesServiceImpl/addShoesRequest" message="tns:addShoes"></input>
<output wsam:Action="shoeshop. example /jaxws/shoes/ShoesServiceImpl/addShoesResponse" message="tns:addShoesResponse"></output>
<fault message="tns:ShoesAlreadyExists" name="ShoesAlreadyExists" wsam:Action="shoeshop.example/jaxws/shoes/ShoesServiceImpl/addShoes/Fault/ShoesAlreadyExists"></fault>
</operation>
<operation name="deleteShoes">
<input wsam:Action="shoeshop. example /jaxws/shoes/ShoesServiceImpl/deleteShoesRequest" message="tns:deleteShoes"></input>
<output wsam:Action="shoeshop. example /jaxws/shoes/ShoesServiceImpl/deleteShoesResponse" message="tns:deleteShoesResponse"></output>
<fault message="tns:ShoesNotFound" name="ShoesNotFound" wsam:Action="shoeshop.example/jaxws/shoes/ShoesServiceImpl/deleteShoes/Fault/ShoesNotFound"></fault>
</operation>
<operation name="countShoes">
<input wsam:Action="shoeshop. example /jaxws/shoes/ShoesServiceImpl/countShoesRequest" message="tns:countShoes"></input>
<output wsam:Action="shoeshop. example /jaxws/shoes/ShoesServiceImpl/countShoesResponse" message="tns:countShoesResponse"></output>
</operation>
</portType>
<binding name="ShoesPortBinding" type="tns:ShoesServiceImpl">
<soap:binding transport="schemas. xmlsoap. org/soap/http" style="document"></soap:binding>
<operation name="getShoes">
<soap:operation soapAction=""></soap:operation>
<input>
<soap:body use="literal"></soap:body>
</input>
<output>
<soap:body use="literal"></soap:body>
</output>
<fault name="ShoesNotFound">
<soap:fault name="ShoesNotFound" use="literal"></soap:fault>
</fault>
</operation>
<operation name="getAllShoes">
<soap:operation soapAction=""></soap:operation>
<input>
<soap:body use="literal"></soap:body>
</input>
<output>
<soap:body use="literal"></soap:body>
</output>
</operation>
<operation name="updateShoes">
<soap:operation soapAction=""></soap:operation>
<input>
<soap:body use="literal"></soap:body>
</input>
<output>
<soap:body use="literal"></soap:body>
</output>
<fault name="ShoesNotFound">
<soap:fault name="ShoesNotFound" use="literal"></soap:fault>
</fault>
</operation>
<operation name="addShoes">
<soap:operation soapAction=""></soap:operation>
<input>
<soap:body use="literal"></soap:body>
</input>
<output>
<soap:body use="literal"></soap:body>
</output>
<fault name="ShoesAlreadyExists">
<soap:fault name="ShoesAlreadyExists" use="literal"></soap:fault>
</fault>
</operation>
<operation name="deleteShoes">
<soap:operation soapAction=""></soap:operation>
<input>
<soap:body use="literal"></soap:body>
</input>
<output>
<soap:body use="literal"></soap:body>
</output>
<fault name="ShoesNotFound">
<soap:fault name="ShoesNotFound" use="literal"></soap:fault>
</fault>
</operation>
<operation name="countShoes">
<soap:operation soapAction=""></soap:operation>
<input>
<soap:body use="literal"></soap:body>
</input>
<output>
<soap:body use="literal"></soap:body>
</output>
</operation>
</binding>
<service name="Shoes">
<port name="ShoesPort" binding="tns:ShoesPortBinding">
<soap:address location="localhost: 18080/ shoesservice"></soap:address>
</port>
</service>
</definitions>

When I launch the TCP/IP Monitor with running Remote Web Service Client code, I get the next messages in XML format:

Request Message

<?xml version="1.0"  standalone="no"?>
<S:Envelope xmlns:S="schemas. xmlsoap. org/soap/envelope/">
<S:Body>
<ns3:getShoes xmlns:ns2="example.org/ShoesShop" xmlns:ns3="shoeshop.example/jaxws/shoes">
<arg0>1</arg0>
</ns3:getShoes>
</S:Body>
</S:Envelope>

Response Message

<?xml version="1.0"  standalone="no"?>
<S:Envelope xmlns:S="schemas. xmlsoap. org/soap/envelope/">
<S:Body>
<S:Fault xmlns:ns4="w3.org/2003/05/soap-envelope">
<faultcode>S:Server</faultcode>
<faultstring>java.lang.NullPointerException</faultstring>
</S:Fault>
</S:Body>
</S:Envelope>

If you need for information, please let me know