diff --git a/apps/emqx_gateway/src/coap/emqx_coap_api.erl b/apps/emqx_gateway/src/coap/emqx_coap_api.erl
index e982a6e2c..5c82e6271 100644
--- a/apps/emqx_gateway/src/coap/emqx_coap_api.erl
+++ b/apps/emqx_gateway/src/coap/emqx_coap_api.erl
@@ -87,19 +87,19 @@ request_parameters() ->
     [{clientid, mk(binary(), #{in => path, required => true})}].
 
 request_body() ->
-    [ {token, mk(binary(), #{desc => "message token, can be empty"})}
-    , {method, mk(enum([get, put, post, delete]), #{desc => "request method type"})}
-    , {timeout, mk(emqx_schema:duration_ms(), #{desc => "timespan for response"})}
+    [ {token, mk(binary(), #{description => "message token, can be empty"})}
+    , {method, mk(enum([get, put, post, delete]), #{description => "request method type"})}
+    , {timeout, mk(emqx_schema:duration_ms(), #{description => "timespan for response"})}
     , {content_type, mk(enum(['text/plain', 'application/json', 'application/octet-stream']),
-                        #{desc => "payload type"})}
-    , {payload, mk(binary(), #{desc => "the content of the payload"})}
+                        #{description => "payload type"})}
+    , {payload, mk(binary(), #{description => "the content of the payload"})}
     ].
 
 coap_message() ->
-    [ {id, mk(integer(), #{desc => "message id"})}
-    , {token, mk(string(), #{desc => "message token, can be empty"})}
-    , {method, mk(string(), #{desc => "response code"})}
-    , {payload, mk(string(), #{desc => "payload"})}
+    [ {id, mk(integer(), #{description => "message id"})}
+    , {token, mk(string(), #{description => "message token, can be empty"})}
+    , {method, mk(string(), #{description => "response code"})}
+    , {payload, mk(string(), #{description => "payload"})}
     ].
 
 format_to_response(ContentType, #coap_message{id = Id,
diff --git a/apps/emqx_gateway/src/emqx_gateway_api.erl b/apps/emqx_gateway/src/emqx_gateway_api.erl
index b3cbcb5b4..2c94dcecb 100644
--- a/apps/emqx_gateway/src/emqx_gateway_api.erl
+++ b/apps/emqx_gateway/src/emqx_gateway_api.erl
@@ -141,7 +141,7 @@ gateway_insta(put, #{body := GwConf0,
     end).
 
 gateway_insta_stats(get, _Req) ->
-    return_http_error(401, "Implement it later (maybe 5.1)").
+    return_http_error(409, "Implement it later (maybe 5.1)").
 
 %%--------------------------------------------------------------------
 %% Swagger defines
@@ -197,7 +197,9 @@ schema("/gateway/:name/stats") ->
               ?STANDARD_RESP(
                  #{200 => emqx_dashboard_swagger:schema_with_examples(
                            ref(gateway_stats),
-                           examples_gateway_stats())
+                           examples_gateway_stats()),
+                   409 => emqx_dashboard_swagger:error_codes(
+                           ['NOT_SUPPORT'], <<"Resource not support">>)
                   })
           }
      }.
@@ -209,7 +211,7 @@ params_gateway_name_in_path() ->
     [{name,
       mk(binary(),
          #{ in => path
-          , desc => <<"Gateway Name">>
+          , description => <<"Gateway Name">>
           , example => <<"">>
           })}
     ].
@@ -220,7 +222,7 @@ params_gateway_status_in_qs() ->
       mk(binary(),
          #{ in => query
           , required => false
-          , desc => <<"Gateway Status">>
+          , description => <<"Gateway Status">>
           , example => <<"">>
           })}
     ].
@@ -236,50 +238,50 @@ roots() ->
 fields(gateway_overview) ->
     [ {name,
        mk(binary(),
-          #{ desc => <<"Gateway Name">>})}
+          #{ description => <<"Gateway Name">>})}
     , {status,
        mk(hoconsc:enum([running, stopped, unloaded]),
-          #{ desc => <<"The Gateway status">>})}
+          #{ description => <<"The Gateway status">>})}
     , {created_at,
        mk(binary(),
-          #{desc => <<"The Gateway created datetime">>})}
+          #{description => <<"The Gateway created datetime">>})}
     , {started_at,
        mk(binary(),
           #{ required => false
-           , desc => <<"The Gateway started datetime">>})}
+           , description => <<"The Gateway started datetime">>})}
     , {stopped_at,
        mk(binary(),
           #{ required => false
-           , desc => <<"The Gateway stopped datetime">>})}
+           , description => <<"The Gateway stopped datetime">>})}
     , {max_connections,
        mk(integer(),
-          #{ desc => <<"The Gateway allowed maximum connections/clients">>})}
+          #{ description => <<"The Gateway allowed maximum connections/clients">>})}
     , {current_connections,
        mk(integer(),
-          #{ desc => <<"The Gateway current connected connections/clients">>
+          #{ description => <<"The Gateway current connected connections/clients">>
            })}
     , {listeners,
        mk(hoconsc:array(ref(gateway_listener_overview)),
          #{ required => {false, recursively}
-          , desc => <<"The Gateway listeners overview">>})}
+          , description => <<"The Gateway listeners overview">>})}
     ];
 fields(gateway_listener_overview) ->
     [ {id,
        mk(binary(),
-          #{ desc => <<"Listener ID">>})}
+          #{ description => <<"Listener ID">>})}
     , {running,
        mk(boolean(),
-          #{ desc => <<"Listener Running status">>})}
+          #{ description => <<"Listener Running status">>})}
     , {type,
        mk(hoconsc:enum([tcp, ssl, udp, dtls]),
-          #{ desc => <<"Listener Type">>})}
+          #{ description => <<"Listener Type">>})}
     ];
 
 fields(Gw) when Gw == stomp; Gw == mqttsn;
                 Gw == coap;  Gw == lwm2m;
                 Gw == exproto ->
     [{name,
-      mk(hoconsc:union([Gw]), #{ desc => <<"Gateway Name">>})}
+      mk(hoconsc:union([Gw]), #{ description => <<"Gateway Name">>})}
     ] ++ convert_listener_struct(emqx_gateway_schema:fields(Gw));
 
 fields(Gw) when Gw == update_stomp; Gw == update_mqttsn;
@@ -296,17 +298,17 @@ fields(Listener) when Listener == tcp_listener;
     [ {id,
        mk(binary(),
           #{ required => false
-           , desc => <<"Listener ID">>})}
+           , description => <<"Listener ID">>})}
     , {type,
        mk(hoconsc:union([tcp, ssl, udp, dtls]),
-          #{ desc => <<"Listener type">>})}
+          #{ description => <<"Listener type">>})}
     , {name,
        mk(binary(),
-          #{ desc => <<"Listener Name">>})}
+          #{ description => <<"Listener Name">>})}
     , {running,
        mk(boolean(),
           #{ required => false
-           , desc => <<"Listener running status">>})}
+           , description => <<"Listener running status">>})}
     ] ++ emqx_gateway_schema:fields(Listener);
 
 fields(gateway_stats) ->
@@ -335,7 +337,7 @@ convert_listener_struct(Schema) ->
              #{type := Type}}, Schema1} = lists:keytake(listeners, 1, Schema),
     ListenerSchema = hoconsc:mk(listeners_schema(Type),
                                 #{ required => {false, recursively}
-                                 , desc => <<"The gateway listeners">>
+                                 , description => <<"The gateway listeners">>
                                  }),
     lists:keystore(listeners, 1, Schema1, {listeners, ListenerSchema}).
 
diff --git a/apps/emqx_gateway/src/emqx_gateway_api_authn.erl b/apps/emqx_gateway/src/emqx_gateway_api_authn.erl
index 240ae5028..837d4a5f5 100644
--- a/apps/emqx_gateway/src/emqx_gateway_api_authn.erl
+++ b/apps/emqx_gateway/src/emqx_gateway_api_authn.erl
@@ -275,7 +275,7 @@ params_gateway_name_in_path() ->
     [{name,
       mk(binary(),
          #{ in => path
-          , desc => <<"Gateway Name">>
+          , description => <<"Gateway Name">>
           , example => <<"">>
           })}
     ].
@@ -283,7 +283,7 @@ params_gateway_name_in_path() ->
 params_userid_in_path() ->
     [{uid, mk(binary(),
               #{ in => path
-               , desc => <<"User ID">>
+               , description => <<"User ID">>
                , example => <<"">>
                })}
     ].
@@ -292,13 +292,13 @@ params_paging_in_qs() ->
     [{page, mk(integer(),
                #{ in => query
                 , required => false
-                , desc => <<"Page Index">>
+                , description => <<"Page Index">>
                 , example => 1
                 })},
      {limit, mk(integer(),
                 #{ in => query
                  , required => false
-                 , desc => <<"Page Limit">>
+                 , description => <<"Page Limit">>
                  , example => 100
                  })}
     ].
@@ -308,14 +308,14 @@ params_fuzzy_in_qs() ->
       mk(binary(),
          #{ in => query
           , required => false
-          , desc => <<"Fuzzy search by username">>
+          , description => <<"Fuzzy search by username">>
           , example => <<"username">>
           })},
      {like_clientid,
       mk(binary(),
          #{ in => query
           , required => false
-          , desc => <<"Fuzzy search by clientid">>
+          , description => <<"Fuzzy search by clientid">>
           , example => <<"clientid">>
           })}
     ].
diff --git a/apps/emqx_gateway/src/emqx_gateway_api_clients.erl b/apps/emqx_gateway/src/emqx_gateway_api_clients.erl
index 01f3458b4..e3e1bd9f7 100644
--- a/apps/emqx_gateway/src/emqx_gateway_api_clients.erl
+++ b/apps/emqx_gateway/src/emqx_gateway_api_clients.erl
@@ -471,60 +471,60 @@ params_client_searching_in_qs() ->
     M = #{in => query, required => false, example => <<"">>},
     [ {node,
        mk(binary(),
-          M#{desc => <<"Match the client's node name">>})}
+          M#{description => <<"Match the client's node name">>})}
     , {clientid,
        mk(binary(),
-          M#{desc => <<"Match the client's ID">>})}
+          M#{description => <<"Match the client's ID">>})}
     , {username,
        mk(binary(),
-          M#{desc => <<"Match the client's Username">>})}
+          M#{description => <<"Match the client's Username">>})}
     , {ip_address,
        mk(binary(),
-          M#{desc => <<"Match the client's ip address">>})}
+          M#{description => <<"Match the client's ip address">>})}
     , {conn_state,
        mk(binary(),
-          M#{desc => <<"Match the client's connection state">>})}
+          M#{description => <<"Match the client's connection state">>})}
     , {proto_ver,
        mk(binary(),
-          M#{desc => <<"Match the client's protocol version">>})}
+          M#{description => <<"Match the client's protocol version">>})}
     , {clean_start,
        mk(boolean(),
-          M#{desc => <<"Match the client's clean start flag">>})}
+          M#{description => <<"Match the client's clean start flag">>})}
     , {like_clientid,
        mk(binary(),
-          M#{desc => <<"Use sub-string to match client's ID">>})}
+          M#{description => <<"Use sub-string to match client's ID">>})}
     , {like_username,
        mk(binary(),
-          M#{desc => <<"Use sub-string to match client's username">>})}
+          M#{description => <<"Use sub-string to match client's username">>})}
     , {gte_created_at,
        mk(emqx_datetime:epoch_millisecond(),
-          M#{desc => <<"Match the session created datetime greater than "
+          M#{description => <<"Match the session created datetime greater than "
                        "a certain value">>})}
     , {lte_created_at,
        mk(emqx_datetime:epoch_millisecond(),
-          M#{desc => <<"Match the session created datetime less than "
+          M#{description => <<"Match the session created datetime less than "
                        "a certain value">>})}
     , {gte_connected_at,
        mk(emqx_datetime:epoch_millisecond(),
-          M#{desc => <<"Match the client socket connected datetime greater "
+          M#{description => <<"Match the client socket connected datetime greater "
                        "than a certain value">>})}
     , {lte_connected_at,
        mk(emqx_datetime:epoch_millisecond(),
-          M#{desc => <<"Match the client socket connected datatime less than "
+          M#{description => <<"Match the client socket connected datatime less than "
                        "a certain value">>})}
     , {endpoint_name,
        mk(binary(),
-          M#{desc => <<"Match the lwm2m client's endpoint name">>})}
+          M#{description => <<"Match the lwm2m client's endpoint name">>})}
     , {like_endpoint_name,
        mk(binary(),
-          M#{desc => <<"Use sub-string to match lwm2m client's endpoint name">>})}
+          M#{description => <<"Use sub-string to match lwm2m client's endpoint name">>})}
     , {gte_lifetime,
        mk(binary(),
-          M#{desc => <<"Match the lwm2m client registered lifetime greater "
+          M#{description => <<"Match the lwm2m client registered lifetime greater "
                         "than a certain value">>})}
     , {lte_lifetime,
        mk(binary(),
-          M#{desc => <<"Match the lwm2m client registered lifetime less than "
+          M#{description => <<"Match the lwm2m client registered lifetime less than "
                        "a certain value">>})}
     ].
 
@@ -533,13 +533,13 @@ params_paging() ->
        mk(integer(),
           #{ in => query
            , required => false
-           , desc => <<"Page Index">>
+           , description => <<"Page Index">>
            , example => 1
            })}
      , {limit,
         mk(integer(),
            #{ in => query
-            , desc => <<"Page Limit">>
+            , description => <<"Page Limit">>
             , required => false
             , example => 100
             })}
@@ -549,7 +549,7 @@ params_gateway_name_in_path() ->
     [{name,
       mk(binary(),
          #{ in => path
-          , desc => <<"Gateway Name">>
+          , description => <<"Gateway Name">>
           })}
     ].
 
@@ -557,7 +557,7 @@ params_clientid_in_path() ->
     [{clientid,
       mk(binary(),
          #{ in => path
-          , desc => <<"Client ID">>
+          , description => <<"Client ID">>
           })}
     ].
 
@@ -565,7 +565,7 @@ params_topic_name_in_path() ->
     [{topic,
       mk(binary(),
          #{ in => path
-          , desc => <<"Topic Filter/Name">>
+          , description => <<"Topic Filter/Name">>
           })}
     ].
 
@@ -612,10 +612,10 @@ fields(coap_client) ->
 fields(lwm2m_client) ->
     [ {endpoint_name,
        mk(binary(),
-          #{ desc => <<"The LwM2M client endpoint name">>})}
+          #{ description => <<"The LwM2M client endpoint name">>})}
     , {lifetime,
        mk(integer(),
-          #{ desc => <<"Life time">>})}
+          #{ description => <<"Life time">>})}
     ] ++ common_client_props();
 fields(exproto_client) ->
     common_client_props();
@@ -623,153 +623,153 @@ fields(exproto_client) ->
 fields(subscription) ->
     [ {topic,
        mk(binary(),
-          #{ desc => <<"Topic Fillter">>})}
+          #{ description => <<"Topic Fillter">>})}
     , {qos,
        mk(integer(),
-          #{ desc => <<"QoS level, enum: 0, 1, 2">>})}
+          #{ description => <<"QoS level, enum: 0, 1, 2">>})}
     , {nl,
        mk(integer(), %% FIXME: why not boolean?
-          #{ desc => <<"No Local option, enum: 0, 1">>})}
+          #{ description => <<"No Local option, enum: 0, 1">>})}
     , {rap,
        mk(integer(),
-          #{ desc => <<"Retain as Published option, enum: 0, 1">>})}
+          #{ description => <<"Retain as Published option, enum: 0, 1">>})}
     , {rh,
        mk(integer(),
-          #{ desc => <<"Retain Handling option, enum: 0, 1, 2">>})}
+          #{ description => <<"Retain Handling option, enum: 0, 1, 2">>})}
     , {sub_props,
        mk(ref(extra_sub_props),
-         #{desc => <<"Subscription properties">>})}
+         #{description => <<"Subscription properties">>})}
     ];
 fields(extra_sub_props) ->
     [ {subid,
        mk(binary(),
-         #{ desc => <<"Only stomp protocol, a unique identity for "
+         #{ description => <<"Only stomp protocol, a unique identity for "
                       "the subscription. range: 1-65535.">>})}
     ].
 
 common_client_props() ->
     [ {node,
        mk(binary(),
-          #{ desc => <<"Name of the node to which the client is "
+          #{ description => <<"Name of the node to which the client is "
                        "connected">>})}
     , {clientid,
        mk(binary(),
-          #{ desc => <<"Client identifier">>})}
+          #{ description => <<"Client identifier">>})}
     , {username,
        mk(binary(),
-          #{ desc => <<"Username of client when connecting">>})}
+          #{ description => <<"Username of client when connecting">>})}
     , {proto_name,
        mk(binary(),
-          #{ desc => <<"Client protocol name">>})}
+          #{ description => <<"Client protocol name">>})}
     , {proto_ver,
        mk(binary(),
-          #{ desc => <<"Protocol version used by the client">>})}
+          #{ description => <<"Protocol version used by the client">>})}
     , {ip_address,
        mk(binary(),
-          #{ desc => <<"Client's IP address">>})}
+          #{ description => <<"Client's IP address">>})}
     , {port,
        mk(integer(),
-          #{ desc => <<"Client's port">>})}
+          #{ description => <<"Client's port">>})}
     , {is_bridge,
        mk(boolean(),
-          #{ desc => <<"Indicates whether the client is connected via "
+          #{ description => <<"Indicates whether the client is connected via "
                        "bridge">>})}
     , {connected_at,
        mk(emqx_datetime:epoch_millisecond(),
-          #{ desc => <<"Client connection time">>})}
+          #{ description => <<"Client connection time">>})}
     , {disconnected_at,
        mk(emqx_datetime:epoch_millisecond(),
-          #{ desc => <<"Client offline time, This field is only valid and "
+          #{ description => <<"Client offline time, This field is only valid and "
                        "returned when connected is false">>})}
     , {connected,
        mk(boolean(),
-          #{ desc => <<"Whether the client is connected">>})}
+          #{ description => <<"Whether the client is connected">>})}
     %% FIXME: the will_msg attribute is not a general attribute
     %% for every protocol. But it should be returned to frontend if someone
     %% want it
     %%
     %, {will_msg,
     %   mk(binary(),
-    %      #{ desc => <<"Client will message">>})}
+    %      #{ description => <<"Client will message">>})}
     , {keepalive,
        mk(integer(),
-          #{ desc => <<"keepalive time, with the unit of second">>})}
+          #{ description => <<"keepalive time, with the unit of second">>})}
     , {clean_start,
        mk(boolean(),
-          #{ desc => <<"Indicate whether the client is using a brand "
+          #{ description => <<"Indicate whether the client is using a brand "
                         "new session">>})}
     , {expiry_interval,
        mk(integer(),
-          #{ desc => <<"Session expiration interval, with the unit of "
+          #{ description => <<"Session expiration interval, with the unit of "
                        "second">>})}
     , {created_at,
        mk(emqx_datetime:epoch_millisecond(),
-          #{ desc => <<"Session creation time">>})}
+          #{ description => <<"Session creation time">>})}
     , {subscriptions_cnt,
        mk(integer(),
-          #{ desc => <<"Number of subscriptions established by this "
+          #{ description => <<"Number of subscriptions established by this "
                        "client">>})}
     , {subscriptions_max,
        mk(integer(),
-          #{ desc => <<"Maximum number of subscriptions allowed by this "
+          #{ description => <<"Maximum number of subscriptions allowed by this "
                        "client">>})}
     , {inflight_cnt,
        mk(integer(),
-          #{ desc => <<"Current length of inflight">>})}
+          #{ description => <<"Current length of inflight">>})}
     , {inflight_max,
        mk(integer(),
-          #{ desc => <<"Maximum length of inflight">>})}
+          #{ description => <<"Maximum length of inflight">>})}
     , {mqueue_len,
        mk(integer(),
-          #{ desc => <<"Current length of message queue">>})}
+          #{ description => <<"Current length of message queue">>})}
     , {mqueue_max,
        mk(integer(),
-          #{ desc => <<"Maximum length of message queue">>})}
+          #{ description => <<"Maximum length of message queue">>})}
     , {mqueue_dropped,
        mk(integer(),
-          #{ desc => <<"Number of messages dropped by the message queue "
+          #{ description => <<"Number of messages dropped by the message queue "
                        "due to exceeding the length">>})}
     , {awaiting_rel_cnt,
        mk(integer(),
           %% FIXME: PUBREC ??
-          #{ desc => <<"Number of awaiting acknowledge packet">>})}
+          #{ description => <<"Number of awaiting acknowledge packet">>})}
     , {awaiting_rel_max,
        mk(integer(),
-          #{ desc => <<"Maximum allowed number of awaiting PUBREC "
+          #{ description => <<"Maximum allowed number of awaiting PUBREC "
                        "packet">>})}
     , {recv_oct,
        mk(integer(),
-          #{ desc => <<"Number of bytes received">>})}
+          #{ description => <<"Number of bytes received">>})}
     , {recv_cnt,
        mk(integer(),
-          #{ desc => <<"Number of socket packets received">>})}
+          #{ description => <<"Number of socket packets received">>})}
     , {recv_pkt,
        mk(integer(),
-          #{ desc => <<"Number of protocol packets received">>})}
+          #{ description => <<"Number of protocol packets received">>})}
     , {recv_msg,
        mk(integer(),
-          #{ desc => <<"Number of message packets received">>})}
+          #{ description => <<"Number of message packets received">>})}
     , {send_oct,
        mk(integer(),
-          #{ desc => <<"Number of bytes sent">>})}
+          #{ description => <<"Number of bytes sent">>})}
     , {send_cnt,
        mk(integer(),
-          #{ desc => <<"Number of socket packets sent">>})}
+          #{ description => <<"Number of socket packets sent">>})}
     , {send_pkt,
        mk(integer(),
-          #{ desc => <<"Number of protocol packets sent">>})}
+          #{ description => <<"Number of protocol packets sent">>})}
     , {send_msg,
        mk(integer(),
-          #{ desc => <<"Number of message packets sent">>})}
+          #{ description => <<"Number of message packets sent">>})}
     , {mailbox_len,
        mk(integer(),
-          #{ desc => <<"Process mailbox size">>})}
+          #{ description => <<"Process mailbox size">>})}
     , {heap_size,
        mk(integer(),
-          #{ desc => <<"Process heap size with the unit of byte">>})}
+          #{ description => <<"Process heap size with the unit of byte">>})}
     , {reductions,
        mk(integer(),
-          #{ desc => <<"Erlang reduction">>})}
+          #{ description => <<"Erlang reduction">>})}
     ].
 
 %%--------------------------------------------------------------------
diff --git a/apps/emqx_gateway/src/emqx_gateway_api_listeners.erl b/apps/emqx_gateway/src/emqx_gateway_api_listeners.erl
index 61285082f..e0bc3c8df 100644
--- a/apps/emqx_gateway/src/emqx_gateway_api_listeners.erl
+++ b/apps/emqx_gateway/src/emqx_gateway_api_listeners.erl
@@ -409,7 +409,7 @@ params_gateway_name_in_path() ->
     [{name,
       mk(binary(),
          #{ in => path
-          , desc => <<"Gateway Name">>
+          , description => <<"Gateway Name">>
           , example => <<"">>
           })}
     ].
@@ -418,7 +418,7 @@ params_listener_id_in_path() ->
     [{id,
       mk(binary(),
          #{ in => path
-          , desc => <<"Listener ID">>
+          , description => <<"Listener ID">>
           , example => <<"">>
           })}
     ].
@@ -426,7 +426,7 @@ params_listener_id_in_path() ->
 params_userid_in_path() ->
     [{uid, mk(binary(),
               #{ in => path
-               , desc => <<"User ID">>
+               , description => <<"User ID">>
                , example => <<"">>
                })}
     ].
@@ -435,13 +435,13 @@ params_paging_in_qs() ->
     [{page, mk(integer(),
                #{ in => query
                 , required => false
-                , desc => <<"Page Index">>
+                , description => <<"Page Index">>
                 , example => 1
                 })},
      {limit, mk(integer(),
                 #{ in => query
                  , required => false
-                 , desc => <<"Page Limit">>
+                 , description => <<"Page Limit">>
                  , example => 100
                  })}
     ].
@@ -458,22 +458,22 @@ fields(listener) ->
     [ {tcp,
        mk(ref(tcp_listener_opts),
           #{ required => {false, recursively}
-           , desc => <<"The tcp socket options for tcp or ssl listener">>
+           , description => <<"The tcp socket options for tcp or ssl listener">>
            })}
     , {ssl,
        mk(ref(ssl_listener_opts),
           #{ required => {false, recursively}
-           , desc => <<"The ssl socket options for ssl listener">>
+           , description => <<"The ssl socket options for ssl listener">>
            })}
     , {udp,
        mk(ref(udp_listener_opts),
           #{ required => {false, recursively}
-           , desc => <<"The udp socket options for udp or dtls listener">>
+           , description => <<"The udp socket options for udp or dtls listener">>
            })}
     , {dtls,
        mk(ref(dtls_listener_opts),
           #{ required => {false, recursively}
-           , desc => <<"The dtls socket options for dtls listener">>
+           , description => <<"The dtls socket options for dtls listener">>
            })}
     ];
 fields(tcp_listener_opts) ->
@@ -530,47 +530,47 @@ common_listener_opts() ->
     [ {enable,
        mk(boolean(),
           #{ required => false
-           , desc => <<"Whether to enable this listener">>})}
+           , description => <<"Whether to enable this listener">>})}
     , {id,
        mk(binary(),
           #{ required => false
-           , desc => <<"Listener Id">>})}
+           , description => <<"Listener Id">>})}
     , {name,
        mk(binary(),
           #{ required => false
-           , desc => <<"Listener name">>})}
+           , description => <<"Listener name">>})}
     , {type,
        mk(hoconsc:enum([tcp, ssl, udp, dtls]),
           #{ required => false
-           , desc => <<"Listener type. Enum: tcp, udp, ssl, dtls">>})}
+           , description => <<"Listener type. Enum: tcp, udp, ssl, dtls">>})}
     , {running,
        mk(boolean(),
           #{ required => false
-           , desc => <<"Listener running status">>})}
+           , description => <<"Listener running status">>})}
     , {bind,
        mk(binary(),
           #{ required => false
-           , desc => <<"Listener bind address or port">>})}
+           , description => <<"Listener bind address or port">>})}
     , {acceptors,
        mk(integer(),
           #{ required => false
-           , desc => <<"Listener acceptors number">>})}
+           , description => <<"Listener acceptors number">>})}
     , {access_rules,
        mk(hoconsc:array(binary()),
           #{ required => false
-           , desc => <<"Listener Access rules for client">>})}
+           , description => <<"Listener Access rules for client">>})}
     , {max_conn_rate,
        mk(integer(),
           #{ required => false
-           , desc => <<"Max connection rate for the listener">>})}
+           , description => <<"Max connection rate for the listener">>})}
     , {max_connections,
        mk(integer(),
           #{ required => false
-           , desc => <<"Max connections for the listener">>})}
+           , description => <<"Max connections for the listener">>})}
     , {mountpoint,
        mk(binary(),
           #{ required => false
-           , desc =>
+           , description =>
 <<"The Mounpoint for clients of the listener. "
   "The gateway-level mountpoint configuration can be overloaded "
   "when it is not null or empty string">>})}
@@ -578,7 +578,7 @@ common_listener_opts() ->
     , {authentication,
        mk(emqx_authn_schema:authenticator_type(),
           #{ required => {false, recursively}
-           , desc => <<"The authenticatior for this listener">>
+           , description => <<"The authenticatior for this listener">>
            })}
     ] ++ emqx_gateway_schema:proxy_protocol_opts().
 
diff --git a/apps/emqx_gateway/src/emqx_gateway_http.erl b/apps/emqx_gateway/src/emqx_gateway_http.erl
index e0795c950..0f83a4374 100644
--- a/apps/emqx_gateway/src/emqx_gateway_http.erl
+++ b/apps/emqx_gateway/src/emqx_gateway_http.erl
@@ -307,11 +307,7 @@ reason2resp(R) ->
 
 -spec return_http_error(integer(), any()) -> {integer(), binary()}.
 return_http_error(Code, Msg) ->
-    {Code, emqx_json:encode(
-             #{code => codestr(Code),
-               message => emqx_gateway_utils:stringfy(Msg)
-              })
-    }.
+    {Code, codestr(Code), emqx_gateway_utils:stringfy(Msg)}.
 
 -spec reason2msg({atom(), map()} | any()) -> error | string().
 reason2msg({badconf, #{key := Key, value := Value, reason := Reason}}) ->
@@ -362,9 +358,9 @@ reason2msg(_) ->
     error.
 
 codestr(400) -> 'BAD_REQUEST';
-codestr(401) -> 'NOT_SUPPORTED_NOW';
 codestr(404) -> 'RESOURCE_NOT_FOUND';
 codestr(405) -> 'METHOD_NOT_ALLOWED';
+codestr(409) -> 'NOT_SUPPORT';
 codestr(500) -> 'UNKNOW_ERROR';
 codestr(501) -> 'NOT_IMPLEMENTED'.
 
diff --git a/apps/emqx_gateway/src/lwm2m/emqx_lwm2m_api.erl b/apps/emqx_gateway/src/lwm2m/emqx_lwm2m_api.erl
index 875bcc691..64455e5ae 100644
--- a/apps/emqx_gateway/src/lwm2m/emqx_lwm2m_api.erl
+++ b/apps/emqx_gateway/src/lwm2m/emqx_lwm2m_api.erl
@@ -117,11 +117,11 @@ schema(?PATH("/write")) ->
 
 fields(resource) ->
     [
-        {operations, mk(binary(), #{desc => <<"Resource Operations">>, example => "E"})},
-        {'dataType', mk(hoconsc:enum(?DATA_TYPE), #{desc => <<"Data Type">>,
+        {operations, mk(binary(), #{description => <<"Resource Operations">>, example => "E"})},
+        {'dataType', mk(hoconsc:enum(?DATA_TYPE), #{description => <<"Data Type">>,
             example => 'Integer'})},
-        {path, mk(binary(), #{desc =>  <<"Resource Path">>, example => "urn:oma:lwm2m:oma:2"})},
-        {name, mk(binary(), #{desc =>  <<"Resource Name">>, example => "lwm2m-test"})}
+        {path, mk(binary(), #{description =>  <<"Resource Path">>, example => "urn:oma:lwm2m:oma:2"})},
+        {name, mk(binary(), #{description =>  <<"Resource Name">>, example => "lwm2m-test"})}
     ].
 
 lookup_cmd(get, #{bindings := Bindings, query_string := QS}) ->