--- java/org/apache/catalina/realm/LocalStrings.properties	(revision 1770568)
+++ java/org/apache/catalina/realm/LocalStrings.properties	(working copy)
@@ -73,6 +73,7 @@ 
 realmBase.createUsernameRetriever.IllegalAccessException=Cannot create object of type {0}.
 realmBase.credentialHandler.customCredentialHandler=Unable to set the property [{0}] to value [{1}] as a custom CredentialHandler has been configured
 realmBase.cannotGetRoles=Cannot get roles from principal [{0}]
+realmBase.gssContextNotEstablished=Authenticator implementation error: the passed security context is not fully established
 userDatabaseRealm.lookup=Exception looking up UserDatabase under key {0}
 userDatabaseRealm.noDatabase=No UserDatabase component found under key {0}
 dataSourceRealm.authenticateFailure=Username {0} NOT successfully authenticated
--- java/org/apache/catalina/realm/RealmBase.java	(revision 1770568)
+++ java/org/apache/catalina/realm/RealmBase.java	(working copy)
@@ -508,6 +508,8 @@ 
                 }
                 return getPrincipal(name, gssCredential);
             }
+        } else {
+            log.error(sm.getString("realmBase.gssContextNotEstablished"));
         }
 
         // Fail in all other cases