java.io.NotSerializableException: com.MessageBroker

Question

I have an object in my Spring application which I want to persist whenever some new data is written into it.

This is my object,

public class MessageBroker implements Serializable{


    private List<Message> backbone;

    private Map<String, List<Message>> messagesReceived;

    private Map<String, List<Message>> messagesSent;


    public MessageBroker(){

        backbone = new ArrayList<>();
        messagesReceived = new ConcurrentHashMap<>();
        messagesSent = new ConcurrentHashMap<>();
    }
..........

Now in the send method on the object, I have this,

public void send(Message message){

  .........
  FileOutputStream fileOutputStream = null;
        ObjectOutputStream objectOutputStream = null;
        try {
            fileOutputStream = new FileOutputStream("./data/store.ser");
            objectOutputStream = new ObjectOutputStream(fileOutputStream);
            objectOutputStream.writeObject(this);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

This is my Message object,

public class Message implements Serializable{

    @Getter @Setter
    private String senderId;
    @Getter  @Setter
    private String receiverId;
    @Getter  @Setter
    private String mediaId;
}

I get the following error,

java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: com.MessageBroker

How am I getting this since I've already implemented Serializable.

What is the full qualified name of `Serializable` you have used? — Antoniossss, Nov 11 '16 at 22:54
You aren't running the code you think you're running. Recompile, redeploy, retest. — user207421, Nov 11 '16 at 23:12
Why MessageBroker is trying to send itself instead of send message? — Ken Bekov, Nov 12 '16 at 02:13

score 0 · Answer 1 · answered Nov 12 '16 at 17:36

Can you please post your complete MessageBroker class? And have you checked all fields inside your MessageBroker class?

I am asking this because if you for example have Logger object inside your class (a lot of people is using loggers :) ) which is not declared as static it can produce this error.

score -1 · Answer 2 · answered Nov 11 '16 at 23:03

-1

Please make sure also Message and all its's fields implements Serializable. If this is not the solution please provide addition information on the used objects.

answered Nov 11 '16 at 23:03

Repi

68
4

Message is also Serializable. What additional information would help? – Nov 11 '16 at 23:05
I've edited my answer to update the Message class. – Nov 11 '16 at 23:07
So the a lest one referenced Object within your MessageBroker or the Message is not serializable. It can also be that a message which is in the map of the broker, holds a reference to an object with is not serializable. – Repi Nov 11 '16 at 23:08
@LarsRepenning exception would point out what member if any is not serializable. – Antoniossss Nov 11 '16 at 23:13

java.io.NotSerializableException: com.MessageBroker

2 Answers2