JBoss Portal login fails using SSL with CAS SSO

Issue

• Login to portal fails with the following exception in server.log:

  INFO  [STDOUT] 2009-08-13 12:03:37,110 INFO [org.jasig.cas.CentralAuthenticationServiceImpl] - <Granted service ticket [ST-3-sjGGhEf3jglQlERi7DhW-cas] for service [https://<domain>.com:8443/portal/authsec/portal/default/default] for user [admin]>
  DEBUG [org.jboss.portal.identity.sso.cas.CASAuthenticationValve] Checking if requested uri '/portal/authsec/portal/default/default' matches secured url patterns: [/sec/, /authsec/, /auth/]
  ERROR [edu.abc.its.tp.cas.client.CASReceipt] edu.abc.its.tp.cas.client.CASAuthenticationException: Unable to validate ProxyTicketValidator [[edu.abc.its.tp.cas.client.ProxyTicketValidator proxyList=[null] [edu.abc.its.tp.cas.client.ServiceTicketValidator casValidateUrl=[https://<domain>:8443/cas/serviceValidate] ticket=[PQ-8-sjDDhEf3jhlQlERp9DhW-cas] service=[https%3A%2F%2F<domain>%2Fportal%2Fauthsec%2Fportal%2Fdefault%2Fdefault] renew=false]]]