Serialization Exception

Question

Hi All,
I am developing webservice application using Dynamic Proxy client. I am using Weblogic8.1 as my application server. All my services are generated using servicegen and clientgen task of Ant.
While using Dynamic Proxy client to invoke webservice, i am passing array of my POJO class. I am generating types using generateTypes option of the service task so that it generates serialized class automatically. But while passing this array object as an input parameter while invoking webservice, i am getting below error -
[java] General exception thrown
[java] java.lang.reflect.UndeclaredThrowableException
[java] at $Proxy0.lookup(Unknown Source)
[java] at cititru.scan.transScan.createGiService(transScan.java:47)
[java] at cititru.scan.transScan.main(transScan.java:22)
[java] Caused by: java.rmi.RemoteException: Failed to invoke; nested exception is:
[java] javax.xml.rpc.JAXRPCException: web service invoke failed: javax.xml.soap.SOAPException: failed to serialize class [Lcititru.api.interdict.gi.ScannedTextData;weblogic.xml.schema.binding.SerializationException: mapping lookup failure. class=class Lcititru.api.interdict.gi.ScannedTextData; class context=TypedClassContext{schemaType=['java:cititru.api.interdict.gi']:ArrayOfScannedTextData}
[java] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
[java] at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
[java] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
[java] at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
[java] at weblogic.webservice.core.rpc.StubImpl.throwRemoteException(StubImpl.java:266)
[java] at weblogic.webservice.core.rpc.StubImpl.invoke(StubImpl.java:251)
[java] ... 3 more
[java] Caused by: javax.xml.rpc.JAXRPCException: web service invoke failed: javax.xml.soap.SOAPException: failed to serialize class [Lcititru.api.interdic
t.gi.ScannedTextData;weblogic.xml.schema.binding.SerializationException: mapping lookup failure. class=class [Lcititru.api.interdict.gi.ScannedTextData; class context=TypedClassContext{schemaType=['java:cititru.api.interdict.gi']:ArrayOfScannedTextData}
[java] at weblogic.webservice.core.rpc.StubImpl._invoke(StubImpl.java:331)
[java] at weblogic.webservice.core.rpc.StubImpl.invoke(StubImpl.java:247)
[java] ... 3 more
In the above error message ScannedTextData is my POJO class which i am passing as an input parameter to webservice. Please suggest me what needs to be done to resolve the above issue.

Answer 1

We'd need some more info to help you. Can you show us the code for your
sfsb? Are you sure you aren't doing something in ejbActivate to replace
the Serializable instance with a new class?
-- Rob
Kiran Raj wrote:
Hi All,
I have a problem while using a serialized class from within a stateful session
bean.
I am setting values to the serialized bean class by using one of the set methods
but at the very next statement when i am printing the values that is set is giving
null.
class myClass implements serializable {
private int counter=0;
public void setValues(){
counter++;
System.out.println(counter);
public int getValues(){
System.out.println(counter);
return counter;
class caller{
public void callingmethod(){
myClass x=new myClass();
x.setValues();
x.getValues();
when i call callingmethod, the output is
1
0
it is getting incremented and then getting reset to 0
I have 2 deployments, a development environment and a production environment.
It works fine in the development environment but fails in the production environment.
The xml files used are the same in both cases, so there is no configuration difference.
I am using welogic 6.1 wih service pack 3 and jdk 1.3.1
I suspect that this is related to serialization in weblogic but dont know exactly
how weblogic implements serialization.
if anybody has encountered this or knows the reasons it would be helpful to me.
Thanks,
Kiran.