The servlet specs uses this name for the session tracking cookie. I think it is sent as an URL parameter the first time when it isn't sure yet if the client accepts cookies. It disappears once its cookiefied.
Is there a way to disable this? We are having some issues due to this. We need to refresh the page in order to load the pictures etc and also our search server is not able to index such pages. Any pointer is greatly appreciated.
Were you able to fix this ? We are having a similar problem : the first time the session is created the jsessionid is added to URLs and there are some links which leads to a 404. It works after refreshing the page (the jsessionid is not there anymore).