Down Activemq broker keep a session of authenticated users

Hello,

I have a broker setup with JAAS authentication (LDAP) , authentication works
fine and dandy. with one issue though, lets say a client connects multiple
times to the broker with the same username/password, everytime the client
connects broker calls the ldap authenticator to authenticate the
username/password.

why doesnt jaas authenticator keep track of authenticated users, why does it
have to query LDAP server for the same user over and over again?

im using ActiveMQ 5.5.1, java 1.7.

Thanks