Under what conditions is a JSESSIONID created?

Question

When / what are the conditions when a JSESSIONID is created?

Is it per a domain? For instance, if I have a Tomcat app server, and I deploy multiple web

Answer 1

For links generated in a JSP with custom tags, I had to use

<%@ page session="false" %>

in the JSP

AND

request.getSession().invalidate();

in the Struts action