@Override
    public List<Entry> lookup(String pattern) {
        ArrayList<Entry> found = new ArrayList<>();
        char[] p = pattern.toCharArray();
        for (Entry specEntry : specs.get()) {
            if (match(specEntry.getNameArray(), p)) {
                found.add(specEntry);
            }
        }
        return found;
    }
Shut down the Mirror. This will close any open connections,
stop the regular mirror updates, and discard all entries.
jrt/src/com/yahoo/jrt/slobrok/api/Mirror.java