javax.jms.JMSException: Failed to serialize object

[frh10]

Hi !

      I deploy a MDB in jboss5.1.0.GA,i create a ObjectMessage instance and set an object(which has implements Serializable) with setObject() method.But the setObject() method throw a error:javax.jms.JMSException: Failed to serialize object,here is the detail code.

ObjectMessage msg=session.createObjectMessage();

DataContainer dc=new DataContainer();

dc.setConn(conn);

msg.setObject(dc);   ( throw error )

and here is the DataContainer's code.

public class DataContainer implements Serializable {

private Connection conn;
public Connection getConn() {
  return conn;
}
public void setConn(Connection conn) {
  this.conn = conn;
}
}

How can i work out this problem?Thanks!

[clebert.suconic]

What is this DataContainer? Is it from JBoss Serialization?

You need to provide a proper Serializable Object as part of the ObjectMessage. HornetQ is using java standard serialization.

It will work as long as ObjectOutputStream.writeObject works. Nothing special here.

[frh10]

DataContainer is a class which implements java.io.Serializable,in that way dc(DataContainer dc=new DataContainer()) is a proper Serializable Object.why also throw this error?how i need to change to solve this?

[clebert.suconic]

Use a proper Serializable Object. Use a HashMap instead and add it to the ObjectMessage.

DataContainer is supposed to be used with JBoss Serialization which is support on HornetQ.

Also: JBoss Serialization was created during a time Sun Microsystems was stubborn about the issues on serialization. Since I've created that project, Sun made several changes on the meta-data, allowing concurrent use. JBoss Serialization may still be faster in some cases, but the biggest gain in performance is now moot with the latest changes on the JDK.

[frh10]

Hi!

     I have used a HashMap to store the DataContainer instance,and add the hashmap to the ObjectMessage.But also throw this error.

[clebert.suconic]

All you are required to do is:

All you have to do is to provide a Serializable object inside your HashMap. That simple.

If you provide something that can't be serializable.. then it can't be...

Just do a simple test:

HashMap map = new HashMap();

map.put("k", yourObject);

ObjectOutputStream out = ... (create a simple outputStream)

out.writeObject(map);

Do the same equivalent to read the object from the OutputStream.

[frh10]

Thanks very much,i get it.

[leminhphung]

Hi frh10ff,

I cannot do it.

Could you please share your code which resolve the bug.

if you cannot public it, let send email to me.

my email : [e-mail]

[clebert.suconic]

Which bug? there's no bug.. you just need to use proper serialization. It's your code after all.

[leminhphung]

Dear Suconic,

I also have a bug same frh10ff's bug.

This's "javax.jms.JMSException: Failed to serialize object". I don't know why that.

[clebert.suconic]

Failed o serialize object: it's pretty obvious.. you have an error in your serialization definitions. This is just pure java. Nothing that we can do for you here.

you just need to be able to do any regular ObjectOutputStream::writeObject

There's no bug here.. you just need to fix your serialization code.

If you don' know how to execute a simple ObjectOutputStream::writeObject to validate you client, please refer to any Java tutorial, or ask question at java forums.

[leminhphung]

Hi Suconic,

I have checked my object.It implemented Serializable.But when i create ObjectMessage --> throw Exception.

My Ojbect :

public abstract Person implements Serializable{

private String Name;

private String Address;

}

and my code use Person:

Person per = new Person;

per.setName("My Name");

per.setAddress("VietNam");

message = session.createObjectMessage();

message.setObject(obj);--> throw exception.

I use serialized object to use JMS send object message .

Do you have a email or yahoo nick or gmail account.

May i contact direct with you?

[clebert.suconic]

No you may not

Ypu have a simple java question here. As I said go look in a java tutorial. Just use a simple objectoutputsteam and you will figure out.

[leminhphung]

Hi Suconic,

Thanks for your support.

I used ObjectOutputStream to write object to a file and i get sub-objects that are not serialized.

[clebert.suconic]

That means you found your issue...

We don't do anything special with serialization. Just what you did to a ByteArray instead of a file.