fix(gw): fix list listeners failed if gateway disabled

apps/emqx_gateway/src/emqx_gateway_api_listeners.erl

@@ -292,7 +292,14 @@ do_listeners_cluster_status(Listeners) ->
         fun({Id, ListenOn}, Acc) ->
             BinId = erlang:atom_to_binary(Id),
             {ok, #{<<"max_connections">> := Max}} = emqx_gateway_conf:listener(BinId),
-            Curr = esockd:get_current_connections({Id, ListenOn}),
+            Curr =
+                try esockd:get_current_connections({Id, ListenOn}) of
+                    Int -> Int
+                catch
+                    %% not started
+                    error:not_found ->
+                        0
+                end,
             Acc#{
                 Id => #{
                     node => Node,

apps/emqx_gateway/src/emqx_gateway_insta_sup.erl

@@ -173,14 +173,14 @@ handle_info(
 ) ->
     case lists:member(Pid, Pids) of
         true ->
-            ?SLOG(error, #{
+            ?SLOG(info, #{
                 msg => "child_process_exited",
                 child => Pid,
                 reason => Reason
             }),
             case Pids -- [Pid] of
                 [] ->
-                    ?SLOG(error, #{
+                    ?SLOG(info, #{
                         msg => "gateway_all_children_process_existed",
                         gateway_name => Name
                     }),
@@ -193,7 +193,7 @@ handle_info(
                     {noreply, State#state{child_pids = RemainPids}}
             end;
         _ ->
-            ?SLOG(error, #{
+            ?SLOG(info, #{
                 msg => "gateway_catch_a_unknown_process_exited",
                 child => Pid,
                 reason => Reason,