Java.rmi.ServerException: Internal Server Error (serialization error....)

Question

Hi to all.
I have two classes.
The first is:
public class FatherBean implements Serializable {
public String name;
public int id;
/** Creates a new instance of ChildBean */
public FatherBean() {
this.name= null;
this.id = 0;
public String getName() {
return name;
public void setName(String name) {
this.name = name;
public int getId() {
return id;
public void setId(int id) {
this.id = id;
The second is :
public class ChildBean extends FatherBean implements Serializable {
public double number;
/** Creates a new instance of ChildBean */
public ChildBean() {
super();
this.number = 0.0;
public double getNumber() {
return number;
public void setNumber(double number) {
this.number = number;
A test client class implements the following method that is exposed as web service:
public java.util.Collection getBeans() {
java.util.Collection beans = new ArrayList();
ChildBean childBean1 = new ChildBean();
ChildBean childBean2 = new ChildBean();
childBean1.setId(100);
childBean1.setName("pippo");
childBean1.setNumber(3.9);
childBean2.setId(100000);
childBean2.setName("pluto");
childBean2.setNumber(4.7);
beans.add(childBean1);
beans.add(childBean2);
return beans;
When I invoke the web service to url:
http://localhost:8080/Prova
and invoke the correspondent method on jsp client, throws exception:
java.rmi.ServerException: Internal Server Error (serialization error: no serializer is registered for (class test.ChildBean, null))
     at com.sun.xml.rpc.client.StreamingSender._raiseFault(StreamingSender.java:357)
     at com.sun.xml.rpc.client.StreamingSender._send(StreamingSender.java:228)
     at ws.ProvaClientGenClient.ProvaRPC_Stub.getBeans(ProvaRPC_Stub.java:59)
     at ws.ProvaClientGenClient.getBeans_handler.doAfterBody(getBeans_handler.java:64)
     at jasper.getBeans_TAGLIB_jsp._jspService(_getBeans_TAGLIB_jsp.java:121)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.iplanet.ias.web.jsp.JspServlet$JspServletWrapper.service(JspServlet.java:552)
     at com.iplanet.ias.web.jsp.JspServlet.serviceJspFile(JspServlet.java:368)
     at com.iplanet.ias.web.jsp.JspServlet.service(JspServlet.java:287)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.StandardWrapperValve.invokeServletService(StandardWrapperValve.java:720)
     at org.apache.catalina.core.StandardWrapperValve.access$000(StandardWrapperValve.java:118)
     at org.apache.catalina.core.StandardWrapperValve$1.run(StandardWrapperValve.java:278)
     at java.security.AccessController.doPrivileged(Native Method)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:274)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:203)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:157)
     at com.iplanet.ias.web.WebContainer.service(WebContainer.java:598)
Where is the problem? Will be ChildBean that extends FatherBean? Wich settings on Sun Java Studio Enterprise 6 2004Q1?
Thank you.

Answer 1

Hi,
This forum is for Sun Java Studio Creator related questions. Could you pls post your message in the appropriate forum.
Thank you
Cheers :-)