1. enable LDAP authentication according to http://www.jspwiki.org/wiki/WebContainerAuthenticationViaLDAP
2. login JSPWiki with LDAP user account which doesn't exist on LDAP server
3. login JSPWiki with LDAP user account which exists on LDAP server but the LDAP server is not started
There is some message to show the background problem to help people out of trouble
No any message displays there, which put user in puzzle.