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Mary Cole
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Joined: Dec 02, 2000
Posts: 362

I get this error whenever I upload a file...pls advice how to overcome this
Brent Sterling
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Joined: Feb 08, 2006
Posts: 948
Looking at your stack trace it appears that your servlet engine (Catalina = Tomcat, correct?) is attempting to duplicate the session between multiple instances using serialization. In the process it finds a CommonsMultipartRequestHandler$CommonsFormFile object that cannot be serialized.

Are you saving your form that contains the FormFile on the session? What if you configured this action to use request scope?

- Brent
I agree. Here's the link:
subject: NotSerializableException
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