NotSerializableException for a POJO

[Aditya Kanitkar]

Hi,

I've a POJO of which i create an ArrayList<myPOJO>

I'm storing it in a session attribute my ArrayList<myPOJO>

Considering above scenario....

Rarely, i get NotSerializableException refering to myclass i.e. myPOJO

Is it related to following.....?

session.setAttribute("myPOJOlist",list);  //list is this  ArrayList<myPOJO>

Thanks,
Aditya Kanitar.

[Bear Bibeault]

Is your class serializable? If not, it should be to be stored in the session.

[Aditya Kanitkar]

No, I haven't implemented serializable to my POJO.... But is it mandatory that the class MUST be implemented with Serializable interface...??

I also have some other POJO's which have been set in Session attribute as List of POJO objects.... But only one of my class gives this exception....

[Ram Narayan.M]

Are you sending this arraylist of POJO Objects in OutputStream connecting to remote Client?... If its, since these objects has also to be sent serialized in the stream, it has to implement "Serializable" interface

[William Brogden]

Rarely, i get NotSerializableException refering to myclass i.e. myPOJO

The exact stack trace would tell you more than guessing. Note that servlet containers are allowed to serialize a session to disk whenever they want to - at that point your POJO would cause that exception.

Bill