red provide
    sufficient privileges within the directory server to read (but not modify)
    the username, password, and assigned roles for each valid user of the
    web application associated with this <code>Realm</code>.  The password
    can be stored in cleartext, or in one of the digested modes supported by
    the <code>org.apache.catalina.realm.RealmBase</code> base class.</p>

    <p>For <em>Username Login</em> mode, <code>JNDIRealm</code> does not
    normally remain connected to the directory s