webservice调用偶发报错nested exception

    第三方系统调用EAS webservice接口，偶发报错：

nested exception is:org.xml.sax.SAXException:

Deserializing parameter'':could not find deserializer for type{http://schemas.xmlsoap.org/soap/encoding/}string

    1.可先尝试修改调用方代码

//调用登陆接口
Service s=new Service();
Call call=(Call)s.createCall();
call.setOperationName("login");
call.setTargetEndpointAddress(" 
call.setReturnType(new QName("urn:client","WSContext"));
call.setReturnClass(WSContext.class);
call.setReturnQName(new QName("","loginReturn"));
//超时
call.setTimeout(Integer.valueOf(1000*600000*60));
call.setMaintainSession(true);
//登陆接口参数
WSContext rs=(WSContext)call.invoke(new Object[]{"am", "", "eas", "bos80demo", "l2",
 Integer.valueOf(0)});
 if(rs. getSessionId() == null){
        throw new Exception(“login fail”);
        }
 System.out.println(rs.getSessionId());
 //清理
 call.clearOperation();
 //调用业务接口
 call.setOperationName("addTest");
 call.setTargetEndpointAddress("http://localhost:8080/ormrpc/services/WStettreeFacade");
 call.setReturnType(new QName("urn:lang.java","String"));
 call.setReturnClass(String.class);
 call.setReturnQName(new QName("","addTestReturn"));
 call.setTimeout(Integer.valueOf(1000*600000*60));
 call.setMaintainSession(true);
 //设置登录返回的session在soap头 "http://login.webservice.bos.kingdee.com"是固定的
 SOAPHeaderElement header=new 
 SOAPHeaderElement("http://login.webservice.bos.kingdee.com","SessionId",
  rs.getSessionId());
  call.addHeader(header);
  //接口参数
  String aa=(String)call.invoke(new Object[]{"test1", "test"} );

    如上代码所示，可声明出返回类型

 call.setReturnType(new QName("urn:lang.java","String"));
 call.setReturnClass(String.class);

2.若修改之后调用报错：

No parameters specified to the Call object! You must call addParameter() for all parameters if you have called setReturnType().

需要根据报错修改代码

call.addParameter(new QName("jsonRows"),org.apache.axis.encoding.XMLType.XSD_STRING,javax.xml.rpc.ParameterMode.IN);
call.addParameter(new QName("jsonParams"),org.apache.axis.encoding.XMLType.XSD_STRING,javax.xml.rpc.ParameterMode.IN);
call.addParameter("jsonResult",org.apache.axis.encoding.XMLType.XSD_STRING,javax.xml.rpc.ParameterMode.OUT);

具体的入参出参类型根据第三方调用方的代码自行调整。

则声明为：