Hi everyone:

Is there any benefit to close session in Servlet Filter? We close session after I save object to database. I don't understand why close it in servlet filter. Does someone give me some idea?

it's closed here to "protect" you.

Only one session session should be used per business process (or unit of work). In webapp, a unit of work is a httprequest.
To prevent unclosed session (and dangerous impacts) the servlet filter automatically closes session if you forget to do it.

You are right! Thks! : )