如何修复wsdl文件中丢失的数据类型错误

Question

我的wsdl文件出现以下错误。这是说errorMesage QName为null，但这对我来说毫无意义，因为我已经对错误消息及其要使用的元素进行了细化。

错误

Exception in thread "main" org.apache.axis2.wsdl.codegen.CodeGenerationException: org.apache.axis2.wsdl.codegen.CodeGenerationException: java.lang.RuntimeException: Element QName is null for errorMessage!
        at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.generate(CodeGenerationEngine.java:293)
        at org.apache.axis2.wsdl.WSDL2Code.main(WSDL2Code.java:35)
        at org.apache.axis2.wsdl.WSDL2Java.main(WSDL2Java.java:24)
Caused by: org.apache.axis2.wsdl.codegen.CodeGenerationException: java.lang.RuntimeException: Element QName is null for errorMessage!
        at org.apache.axis2.wsdl.codegen.emitter.AxisServiceBasedMultiLanguageEmitter.emitSkeleton(AxisServiceBasedMultiLanguageEmitter.java:1451)
        at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.generate(CodeGenerationEngine.java:275)
        ... 2 more
Caused by: java.lang.RuntimeException: Element QName is null for errorMessage!

wsd文件的一部分。

           <element name="errorMessage">
              <complexType>
                  <all>
                      <element name="errorMessage" type="string"/>
                  </all>
              </complexType>
           </element>



    </xsd:schema>

  </types>



  <message name="artistName">
   <part name="body" element="app:artistName"/>
  </message>

    <message name="discNumber">
   <part name="body" element="app:discNumber"/>
  </message>


    <message name="listTracks">


   <part name="body" element="app:listTracks"/>

  </message>

  <message name="errorMessage">
  <part name="body" element="app:errorMessage"/>
  </message>


  <portType name="musicPort">
    <operation name="getComposer">

<!-- include input and output messages defined above -->

        <input message="app:artistName"/>
        <output message="app:listTracks"/>
<fault message="app:errorMessage"/>
    </operation>

我正在跟踪一个教程，该教程告诉我以下内容是如何定义errorFault的，但是它也只是给了我完全相同的错误。

<message name="errorFault"><part name="errorPart" element="..."/></message>