synchronized(requests) { requests.remove(id_obj); }
requests.remove(id_obj);
    private void removeEntry(long id) {        Long id_obj = new Long(id);        // changed by bela Feb 28 2003 (bug fix for 690606)        // changed back to use synchronization by bela June 27 2003 (bug fix for #761804),        // we can do this because we now copy for iteration (viewChange() and suspect())        synchronized(requests) {            requests.remove(id_obj);        }    }