Hi, guys

I am developing a web app by using Grails and using Grails LDAP as my Authentication mechanism. However, i always get following error:

{Error 500: Cannot pass null or empty values to constructor Servlet: default URI: /ldap-app/j_spring_security_check Exception Message: Cannot pass null or empty values to constructor Caused by: Cannot pass null or empty values to constructor Class: GrailsAuthenticationProcessingFilter }

My SecurityConfig.groovy file is :

security { // see DefaultSecurityConfig.groovy for all settable/overridable properties active = true loginUserDomainClass = "User" authorityDomainClass = "Role" requestMapClass = "Requestmap"

useLdap = true
ldapRetrieveDatabaseRoles = false
ldapRetrieveGroupRoles = false
ldapServer = 'ldap://worf-mi.dapc.kao.au:389'
ldapManagerDn = 'CN=sa-ldap-its,OU=Unix Servers for Kerberos,OU=Information Technology Services,OU=Special Accounts,DC=nexus,DC=dpac,DC=cn'
ldapManagerPassword = 'Asdf1234'
ldapSearchBase = 'OU=People,DC=nexus,DC=dpac,DC=cn'
ldapSearchFilter = '(&(cn={0})(objectClass=user))'

}