Enthuware

in the question there is: "(...)When the user checksout or empties the cart(...)"
should be:
"When the user checks out or empties the cart"

This has been updated.

Thanks for your feedback!

I may not fully understand the explanation :

Removing entries in ejbRemove() will not help in clearing abandoned rows because ejbRemove() is not guaranteed to be executed in all cases.

I think the question is asking what happens when the EJB container crash or when system exception is thrown. When these cases happens, @Remove / @PreDestroy method is not called and old table entries will not be cleared.

So, the bean provider should clean up the table periodically.

Yes, that is correct.