don't create topics

src/emqttd_broker.erl

@@ -115,9 +115,6 @@ stop_tick(TRef) ->
 init([]) ->
     emqttd_time:seed(),
     ets:new(?BROKER_TAB, [set, public, named_table]),
-    % Create $SYS Topics
-    emqttd:create(topic, <<"$SYS/brokers">>),
-    [ok = create_topic(Topic) || Topic <- ?SYSTOP_BROKERS],
     % Tick
     {ok, #state{started_at = os:timestamp(),
                 heartbeat  = start_tick(1000, heartbeat),
@@ -160,9 +157,6 @@ code_change(_OldVsn, State, _Extra) ->
 %% Internal functions
 %%--------------------------------------------------------------------
 
-create_topic(Topic) ->
-    emqttd:create(topic, emqttd_topic:systop(Topic)).
-
 retain(brokers) ->
     Payload = list_to_binary(string:join([atom_to_list(N) ||
                     N <- emqttd_mnesia:running_nodes()], ",")),

src/emqttd_metrics.erl

@@ -243,7 +243,7 @@ init([]) ->
     % Init metrics
     [create_metric(Metric) ||  Metric <- Metrics],
     % $SYS Topics for metrics
-    [ok = emqttd:create(topic, metric_topic(Topic)) || {_, Topic} <- Metrics],
+    % [ok = emqttd:create(topic, metric_topic(Topic)) || {_, Topic} <- Metrics],
     % Tick to publish metrics
     {ok, #state{tick_tref = emqttd_broker:start_tick(tick)}, hibernate}.
 

src/emqttd_stats.erl

@@ -122,7 +122,7 @@ init([]) ->
     Topics = ?SYSTOP_CLIENTS ++ ?SYSTOP_SESSIONS ++ ?SYSTOP_PUBSUB ++ ?SYSTOP_RETAINED,
     ets:insert(?STATS_TAB, [{Topic, 0} || Topic <- Topics]),
     % Create $SYS Topics
-    [ok = emqttd:create(topic, stats_topic(Topic)) || Topic <- Topics],
+    % [ok = emqttd:create(topic, stats_topic(Topic)) || Topic <- Topics],
     % Tick to publish stats
     {ok, #state{tick_tref = emqttd_broker:start_tick(tick)}, hibernate}.