diff --git a/src/emqx.appup.src b/src/emqx.appup.src
index 80d294f37..89ca543b8 100644
--- a/src/emqx.appup.src
+++ b/src/emqx.appup.src
@@ -22,11 +22,11 @@
      {load_module, emqx_router, soft_purge, soft_purge, [emqx_trie]},
      {load_module, emqx_cm, brutal_purge, soft_purge, []},
      {load_module, emqx_access_rule, brutal_purge, soft_purge, []},
-     {load_module,emqx_pqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_mqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_alarm_handler,brutal_purge,soft_purge,[]},
+     {load_module, emqx_pqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_mqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_alarm_handler,brutal_purge,soft_purge,[]},
      {load_module, emqx_app, brutal_purge, soft_purge, []},
-     {load_module,emqx_misc,brutal_purge,soft_purge,[]}
+     {load_module, emqx_misc,brutal_purge,soft_purge,[]}
    ]},
    {"4.2.1", [
      {add_module, emqx_congestion},
@@ -47,11 +47,11 @@
      {load_module, emqx_router, soft_purge, soft_purge, [emqx_trie]},
      {load_module, emqx_cm, brutal_purge, soft_purge, []},
      {load_module, emqx_access_rule, brutal_purge, soft_purge, []},
-     {load_module,emqx_pqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_mqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_alarm_handler,brutal_purge,soft_purge,[]},
+     {load_module, emqx_pqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_mqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_alarm_handler,brutal_purge,soft_purge,[]},
      {load_module, emqx_app, brutal_purge, soft_purge, []},
-     {load_module,emqx_misc,brutal_purge,soft_purge,[]}
+     {load_module, emqx_misc,brutal_purge,soft_purge,[]}
    ]},
    {<<"4.2.[23]">>, [
      {add_module, emqx_congestion},
@@ -69,10 +69,10 @@
      {load_module, emqx_router, soft_purge, soft_purge, [emqx_trie]},
      {load_module, emqx_cm, brutal_purge, soft_purge, []},
      {load_module, emqx_access_rule, brutal_purge, soft_purge, []},
-     {load_module,emqx_pqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_mqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_alarm_handler,brutal_purge,soft_purge,[]},
-     {load_module,emqx_misc,brutal_purge,soft_purge,[]},
+     {load_module, emqx_pqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_mqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_alarm_handler,brutal_purge,soft_purge,[]},
+     {load_module, emqx_misc,brutal_purge,soft_purge,[]},
      {load_module, emqx_app, brutal_purge, soft_purge, []},
      {load_module, emqx_limiter, brutal_purge, soft_purge, []}
    ]},
@@ -91,10 +91,10 @@
      {load_module, emqx_router, soft_purge, soft_purge, [emqx_trie]},
      {load_module, emqx_cm, brutal_purge, soft_purge, []},
      {load_module, emqx_access_rule, brutal_purge, soft_purge, []},
-     {load_module,emqx_pqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_mqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_alarm_handler,brutal_purge,soft_purge,[]},
-     {load_module,emqx_misc,brutal_purge,soft_purge,[]},
+     {load_module, emqx_pqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_mqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_alarm_handler,brutal_purge,soft_purge,[]},
+     {load_module, emqx_misc,brutal_purge,soft_purge,[]},
      {load_module, emqx_app, brutal_purge, soft_purge, []},
      {load_module, emqx_limiter, brutal_purge, soft_purge, []}
    ]},
@@ -113,10 +113,10 @@
      {load_module, emqx_router, soft_purge, soft_purge, [emqx_trie]},
      {load_module, emqx_cm, brutal_purge, soft_purge, []},
      {load_module, emqx_access_rule, brutal_purge, soft_purge, []},
-     {load_module,emqx_pqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_mqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_alarm_handler,brutal_purge,soft_purge,[]},
-     {load_module,emqx_misc,brutal_purge,soft_purge,[]},
+     {load_module, emqx_pqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_mqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_alarm_handler,brutal_purge,soft_purge,[]},
+     {load_module, emqx_misc,brutal_purge,soft_purge,[]},
      {load_module, emqx_app, brutal_purge, soft_purge, []},
      {load_module, emqx_limiter, brutal_purge, soft_purge, []}
    ]},
@@ -127,10 +127,10 @@
      {load_module, emqx_ws_connection, brutal_purge, soft_purge, []},
      {load_module, emqx_cm, brutal_purge, soft_purge, []},
      {load_module, emqx_access_rule, brutal_purge, soft_purge, []},
-     {load_module,emqx_pqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_mqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_alarm_handler,brutal_purge,soft_purge,[]},
-     {load_module,emqx_misc,brutal_purge,soft_purge,[]},
+     {load_module, emqx_pqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_mqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_alarm_handler,brutal_purge,soft_purge,[]},
+     {load_module, emqx_misc,brutal_purge,soft_purge,[]},
      {load_module, emqx_app, brutal_purge, soft_purge, []},
      {load_module, emqx_alarm, brutal_purge, soft_purge, []},
      {load_module, emqx_os_mon, brutal_purge, soft_purge, []},
@@ -149,6 +149,7 @@
    ]},
    {<<"4.2.9">>, [
      {load_module, emqx_frame, brutal_purge, soft_purge, []},
+     {load_module, emqx_channel, brutal_purge, soft_purge, []},
      {load_module, emqx_connection, brutal_purge, soft_purge, []},
      {load_module, emqx_ws_connection, brutal_purge, soft_purge, []},
      {load_module, emqx_limiter, brutal_purge, soft_purge, []},
@@ -157,9 +158,10 @@
      {load_module, emqx_os_mon, brutal_purge, soft_purge, []}
    ]},
    {<<"4.2.10">>, [
-     {load_module,emqx_app, brutal_purge, soft_purge, []},
-     {load_module,emqx_os_mon, brutal_purge, soft_purge, []},
-     {load_module,emqx_alarm, brutal_purge, soft_purge, []}
+     {load_module, emqx_channel, brutal_purge, soft_purge, []},
+     {load_module, emqx_app, brutal_purge, soft_purge, []},
+     {load_module, emqx_os_mon, brutal_purge, soft_purge, []},
+     {load_module, emqx_alarm, brutal_purge, soft_purge, []}
    ]},
    {<<".*">>, []}
  ],
@@ -184,11 +186,11 @@
      {load_module, emqx_router, soft_purge, soft_purge, []},
      {load_module, emqx_cm, brutal_purge, soft_purge, []},
      {load_module, emqx_access_rule, brutal_purge, soft_purge, []},
-     {load_module,emqx_pqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_mqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_alarm_handler,brutal_purge,soft_purge,[]},
-     {load_module,emqx_app, brutal_purge, soft_purge, []},
-     {load_module,emqx_misc,brutal_purge,soft_purge,[]}
+     {load_module, emqx_pqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_mqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_alarm_handler,brutal_purge,soft_purge,[]},
+     {load_module, emqx_app, brutal_purge, soft_purge, []},
+     {load_module, emqx_misc,brutal_purge,soft_purge,[]}
    ]},
    {"4.2.1", [
      {load_module, emqx_shared_sub, brutal_purge, soft_purge, []},
@@ -209,11 +211,11 @@
      {load_module, emqx_router, soft_purge, soft_purge, []},
      {load_module, emqx_cm, brutal_purge, soft_purge, []},
      {load_module, emqx_access_rule, brutal_purge, soft_purge, []},
-     {load_module,emqx_pqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_mqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_alarm_handler,brutal_purge,soft_purge,[]},
-     {load_module,emqx_app, brutal_purge, soft_purge, []},
-     {load_module,emqx_misc,brutal_purge,soft_purge,[]}
+     {load_module, emqx_pqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_mqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_alarm_handler,brutal_purge,soft_purge,[]},
+     {load_module, emqx_app, brutal_purge, soft_purge, []},
+     {load_module, emqx_misc,brutal_purge,soft_purge,[]}
    ]},
    {<<"4.2.[23]">>, [
      {load_module, emqx_shared_sub, brutal_purge, soft_purge, []},
@@ -231,11 +233,11 @@
      {load_module, emqx_router, soft_purge, soft_purge, []},
      {load_module, emqx_cm, brutal_purge, soft_purge, []},
      {load_module, emqx_access_rule, brutal_purge, soft_purge, []},
-     {load_module,emqx_pqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_mqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_alarm_handler,brutal_purge,soft_purge,[]},
-     {load_module,emqx_misc,brutal_purge,soft_purge,[]},
-     {load_module,emqx_app, brutal_purge, soft_purge, []},
+     {load_module, emqx_pqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_mqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_alarm_handler,brutal_purge,soft_purge,[]},
+     {load_module, emqx_misc,brutal_purge,soft_purge,[]},
+     {load_module, emqx_app, brutal_purge, soft_purge, []},
      {load_module, emqx_limiter, brutal_purge, soft_purge, []}
    ]},
    {<<"4.2.4">>, [
@@ -252,12 +254,12 @@
      {load_module, emqx_router, soft_purge, soft_purge, []},
      {load_module, emqx_cm, brutal_purge, soft_purge, []},
      {load_module, emqx_access_rule, brutal_purge, soft_purge, []},
-     {load_module,emqx_pqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_mqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_alarm_handler,brutal_purge,soft_purge,[]},
-     {load_module,emqx_app, brutal_purge, soft_purge, []},
-     {load_module,emqx_os_mon, brutal_purge, soft_purge, []},
-     {load_module,emqx_misc,brutal_purge,soft_purge,[]},
+     {load_module, emqx_pqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_mqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_alarm_handler,brutal_purge,soft_purge,[]},
+     {load_module, emqx_app, brutal_purge, soft_purge, []},
+     {load_module, emqx_os_mon, brutal_purge, soft_purge, []},
+     {load_module, emqx_misc,brutal_purge,soft_purge,[]},
      {load_module, emqx_limiter, brutal_purge, soft_purge, []}
    ]},
    {<<"4.2.5">>, [
@@ -274,12 +276,12 @@
      {load_module, emqx_router, soft_purge, soft_purge, []},
      {load_module, emqx_cm, brutal_purge, soft_purge, []},
      {load_module, emqx_access_rule, brutal_purge, soft_purge, []},
-     {load_module,emqx_pqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_mqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_alarm_handler,brutal_purge,soft_purge,[]},
-     {load_module,emqx_app, brutal_purge, soft_purge, []},
-     {load_module,emqx_os_mon, brutal_purge, soft_purge, []},
-     {load_module,emqx_misc,brutal_purge,soft_purge,[]},
+     {load_module, emqx_pqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_mqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_alarm_handler,brutal_purge,soft_purge,[]},
+     {load_module, emqx_app, brutal_purge, soft_purge, []},
+     {load_module, emqx_os_mon, brutal_purge, soft_purge, []},
+     {load_module, emqx_misc,brutal_purge,soft_purge,[]},
      {load_module, emqx_limiter, brutal_purge, soft_purge, []}
    ]},
    {<<"4.2.[6-7]">>, [
@@ -289,13 +291,13 @@
      {load_module, emqx_ws_connection, brutal_purge, soft_purge, []},
      {load_module, emqx_cm, brutal_purge, soft_purge, []},
      {load_module, emqx_access_rule, brutal_purge, soft_purge, []},
-     {load_module,emqx_pqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_mqueue,brutal_purge,soft_purge,[]},
-     {load_module,emqx_alarm_handler,brutal_purge,soft_purge,[]},
-     {load_module,emqx_app, brutal_purge, soft_purge, []},
-     {load_module,emqx_os_mon, brutal_purge, soft_purge, []},
-     {load_module,emqx_alarm, brutal_purge, soft_purge, []},
-     {load_module,emqx_misc,brutal_purge,soft_purge,[]},
+     {load_module, emqx_pqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_mqueue,brutal_purge,soft_purge,[]},
+     {load_module, emqx_alarm_handler,brutal_purge,soft_purge,[]},
+     {load_module, emqx_app, brutal_purge, soft_purge, []},
+     {load_module, emqx_os_mon, brutal_purge, soft_purge, []},
+     {load_module, emqx_alarm, brutal_purge, soft_purge, []},
+     {load_module, emqx_misc,brutal_purge,soft_purge,[]},
      {load_module, emqx_limiter, brutal_purge, soft_purge, []}
    ]},
    {<<"4.2.8">>, [
@@ -304,24 +306,26 @@
      {load_module, emqx_connection, brutal_purge, soft_purge, []},
      {load_module, emqx_ws_connection, brutal_purge, soft_purge, []},
      {load_module, emqx_cm, brutal_purge, soft_purge, []},
-     {load_module,emqx_app, brutal_purge, soft_purge, []},
-     {load_module,emqx_os_mon, brutal_purge, soft_purge, []},
-     {load_module,emqx_alarm, brutal_purge, soft_purge, []},
+     {load_module, emqx_app, brutal_purge, soft_purge, []},
+     {load_module, emqx_os_mon, brutal_purge, soft_purge, []},
+     {load_module, emqx_alarm, brutal_purge, soft_purge, []},
      {load_module, emqx_limiter, brutal_purge, soft_purge, []}
    ]},
    {<<"4.2.9">>, [
      {load_module, emqx_frame, brutal_purge, soft_purge, []},
+     {load_module, emqx_channel, brutal_purge, soft_purge, []},
      {load_module, emqx_connection, brutal_purge, soft_purge, []},
      {load_module, emqx_ws_connection, brutal_purge, soft_purge, []},
      {load_module, emqx_limiter, brutal_purge, soft_purge, []},
-     {load_module,emqx_app, brutal_purge, soft_purge, []},
-     {load_module,emqx_os_mon, brutal_purge, soft_purge, []},
-     {load_module,emqx_alarm, brutal_purge, soft_purge, []}
+     {load_module, emqx_app, brutal_purge, soft_purge, []},
+     {load_module, emqx_os_mon, brutal_purge, soft_purge, []},
+     {load_module, emqx_alarm, brutal_purge, soft_purge, []}
    ]},
    {<<"4.2.10">>, [
-     {load_module,emqx_app, brutal_purge, soft_purge, []},
-     {load_module,emqx_os_mon, brutal_purge, soft_purge, []},
-     {load_module,emqx_alarm, brutal_purge, soft_purge, []}
+     {load_module, emqx_channel, brutal_purge, soft_purge, []},
+     {load_module, emqx_app, brutal_purge, soft_purge, []},
+     {load_module, emqx_os_mon, brutal_purge, soft_purge, []},
+     {load_module, emqx_alarm, brutal_purge, soft_purge, []}
    ]},
    {<<".*">>, []}
  ]