diff --git a/apps/emqx_gateway/src/emqx_gateway_conf.erl b/apps/emqx_gateway/src/emqx_gateway_conf.erl
index cd1f64871..d2f6921e3 100644
--- a/apps/emqx_gateway/src/emqx_gateway_conf.erl
+++ b/apps/emqx_gateway/src/emqx_gateway_conf.erl
@@ -275,7 +275,7 @@ ret_gw(GwName, {ok, #{raw_config := GwConf}}) ->
                 end, maps:to_list(SubConf)),
             [NLConfs | Acc]
         end, [], maps:to_list(LsConf)),
-    {ok, maps:merge(GwConf1, #{<<"listeners">> => NLsConf})};
+    {ok, maps:merge(GwConf1, #{<<"listeners">> => lists:append(NLsConf)})};
 ret_gw(_GwName, Err) -> Err.
 
 ret_authn(GwName, {ok, #{raw_config := GwConf}}) ->
diff --git a/apps/emqx_gateway/src/emqx_gateway_utils.erl b/apps/emqx_gateway/src/emqx_gateway_utils.erl
index 95720ff13..cc771ed95 100644
--- a/apps/emqx_gateway/src/emqx_gateway_utils.erl
+++ b/apps/emqx_gateway/src/emqx_gateway_utils.erl
@@ -46,7 +46,6 @@
         ]).
 
 -export([ stringfy/1
-        , parse_address/1
         ]).
 
 -export([ normalize_config/1
@@ -332,19 +331,6 @@ stringfy(T) when is_list(T); is_binary(T) ->
 stringfy(T) ->
     iolist_to_binary(io_lib:format("~0p", [T])).
 
--spec parse_address(binary() | list()) -> {list(), integer()}.
-parse_address(S) when is_binary(S); is_list(S) ->
-    S1 = case is_binary(S) of
-            true -> lists:reverse(binary_to_list(S));
-             _ -> lists:reverse(S)
-         end,
-    case re:split(S1, ":", [{parts, 2}, {return, list}]) of
-        [Port0, Host0] ->
-            {lists:reverse(Host0), list_to_integer(lists:reverse(Port0))};
-        _ ->
-            error(badarg)
-    end.
-
 -spec normalize_config(emqx_config:config())
     -> list({ Type :: udp | tcp | ssl | dtls
             , Name :: atom()
diff --git a/apps/emqx_gateway/src/exproto/emqx_exproto_impl.erl b/apps/emqx_gateway/src/exproto/emqx_exproto_impl.erl
index 48dca4324..75057534f 100644
--- a/apps/emqx_gateway/src/exproto/emqx_exproto_impl.erl
+++ b/apps/emqx_gateway/src/exproto/emqx_exproto_impl.erl
@@ -148,13 +148,16 @@ stop_grpc_server(GwName) ->
 start_grpc_client_channel(_GwName, undefined) ->
     undefined;
 start_grpc_client_channel(GwName, Options = #{address := Address}) ->
-    {Host, Port} = try emqx_gateway_utils:parse_address(Address)
-                   catch error : badarg ->
-                         throw({badconf, #{key => address,
-                                           value => Address,
-                                           reason => illegal_grpc_address
-                                          }})
-                   end,
+    #{host := Host, port := Port} =
+        case emqx_http_lib:uri_parse(Address) of
+            {ok, URIMap0} -> URIMap0;
+            {error, _Reason} ->
+              throw({badconf, #{key => address,
+                                value => Address,
+                                reason => illegal_grpc_address
+                               }})
+
+        end,
     case maps:to_list(maps:get(ssl, Options, #{})) of
         [] ->
             SvrAddr = compose_http_uri(http, Host, Port),
@@ -170,7 +173,7 @@ start_grpc_client_channel(GwName, Options = #{address := Address}) ->
 compose_http_uri(Scheme, Host, Port) ->
     lists:flatten(
       io_lib:format(
-        "~s://~s:~w", [Scheme, Host, Port])).
+        "~s://~s:~w", [Scheme, inet:ntoa(Host), Port])).
 
 stop_grpc_client_channel(GwName) ->
     _ = grpc_client_sup:stop_channel_pool(GwName),
diff --git a/apps/emqx_gateway/src/lwm2m/emqx_lwm2m_impl.erl b/apps/emqx_gateway/src/lwm2m/emqx_lwm2m_impl.erl
index 47ed722b1..f4d73879d 100644
--- a/apps/emqx_gateway/src/lwm2m/emqx_lwm2m_impl.erl
+++ b/apps/emqx_gateway/src/lwm2m/emqx_lwm2m_impl.erl
@@ -92,7 +92,7 @@ on_gateway_update(Config, Gateway, GwState = #{ctx := Ctx}) ->
 
 on_gateway_unload(_Gateway = #{ name := GwName,
                                 config := Config
-                              }, _GwState = #{registry := RegPid}) ->
-    exit(RegPid, kill),
+                              }, _GwState = #{registry := _RegPid}) ->
+    _ = try emqx_lwm2m_xml_object_db:stop() catch _ : _  -> ok end,
     Listeners = emqx_gateway_utils:normalize_config(Config),
     emqx_gateway_utils:stop_listeners(GwName, Listeners).
diff --git a/apps/emqx_gateway/test/emqx_exproto_SUITE.erl b/apps/emqx_gateway/test/emqx_exproto_SUITE.erl
index 993ed4975..69e9afbaf 100644
--- a/apps/emqx_gateway/test/emqx_exproto_SUITE.erl
+++ b/apps/emqx_gateway/test/emqx_exproto_SUITE.erl
@@ -69,7 +69,7 @@ set_special_cfg(emqx_gateway) ->
     emqx_config:put(
       [gateway, exproto],
       #{server => #{bind => 9100},
-        handler => #{address => "127.0.0.1:9001"},
+        handler => #{address => "http://127.0.0.1:9001"},
         listeners => listener_confs(LisType)
        });
 set_special_cfg(_App) ->
diff --git a/apps/emqx_gateway/test/emqx_gateway_api_SUITE.erl b/apps/emqx_gateway/test/emqx_gateway_api_SUITE.erl
index f91347a6e..9b303c100 100644
--- a/apps/emqx_gateway/test/emqx_gateway_api_SUITE.erl
+++ b/apps/emqx_gateway/test/emqx_gateway_api_SUITE.erl
@@ -172,7 +172,7 @@ t_gateway_exproto(_) ->
     %% post
     GwConf = #{name => <<"exproto">>,
                server => #{bind => <<"9100">>},
-               handler => #{address => <<"127.0.0.1:9001">>},
+               handler => #{address => <<"http://127.0.0.1:9001">>},
                listeners => [
                   #{name => <<"def">>, type => <<"tcp">>, bind => <<"7993">>}
                 ]