diff --git a/.ci/docker-compose-file/conf.cluster.env b/.ci/docker-compose-file/conf.cluster.env
index 2a10bd321..b5cefe472 100644
--- a/.ci/docker-compose-file/conf.cluster.env
+++ b/.ci/docker-compose-file/conf.cluster.env
@@ -6,3 +6,8 @@ EMQX_ZONES__DEFAULT__LISTENERS__MQTT_WS__PROXY_PROTOCOL=true
 EMQX_LOG__CONSOLE_HANDLER__ENABLE=true
 EMQX_LOG__CONSOLE_HANDLER__LEVEL=debug
 EMQX_LOG__PRIMARY_LEVEL=debug
+EMQX_ZONES__DEFAULT__MQTT__MAX_TOPIC_ALIAS=10
+EMQX_ZONES__DEFAULT__MQTT__RETRY_INTERVAL=2s
+HOCON_ENV_OVERRIDE_PREFIX=EMQX_
+EMQX_LOG__PRIMARY_LEVEL=debug
+EMQX_LOG__CONSOLE_HANDLER__LEVEL=debug
diff --git a/apps/emqx/src/emqx.erl b/apps/emqx/src/emqx.erl
index b1c976cc1..3002c0ee0 100644
--- a/apps/emqx/src/emqx.erl
+++ b/apps/emqx/src/emqx.erl
@@ -211,11 +211,14 @@ shutdown() ->
     shutdown(normal).
 
 shutdown(Reason) ->
-    ?LOG(critical, "emqx shutdown for ~s", [Reason]),
+    ?SLOG(critical, #{msg => "stopping_apps", reason => Reason}),
     _ = emqx_alarm_handler:unload(),
-    lists:foreach(fun application:stop/1
-                 , lists:reverse(default_started_applications())
-                 ).
+    lists:foreach(fun stop_app/1, lists:reverse(default_started_applications())).
+
+
+stop_app(App) ->
+    ?SLOG(debug, #{msg => "stopping_app", app => App}),
+    application:stop(App).
 
 reboot() ->
     lists:foreach(fun application:start/1 , default_started_applications()).