Java Serialization Exception Message

Question

When running an application locally on my box, the application works perfectly. When deployed to QA, the error below is received. I am running Tomcat 5.5.23 locally and in QA. T

Answer 1

This means you have put an object in the session that is not serializable, and you have enabled session persistence on server stop.

You have multiple options:

• make the class in question implement Serializable
• remove it from the session on sessionDestroyed(..) of a HttpSessionListener
• if it is a member of another class stored in the session, make it transient
• simply ignore the error

You should also clean the "work" directory of tomcat so that no previous serialized session is restored.