fix(emqx_cm): catch noproc exception from rpc_call (#5048)

src/emqx.appup.src

@@ -3,7 +3,8 @@
   [
    {"4.3.3",
     [{load_module,emqx_packet,brutal_purge,soft_purge,[]},
-     {load_module,emqx_ws_connection,brutal_purge,soft_purge,[]}
+     {load_module,emqx_ws_connection,brutal_purge,soft_purge,[]},
+     {load_module,emqx_cm,brutal_purge,soft_purge,[]}
     ]},
    {"4.3.2",
     [{load_module,emqx_packet,brutal_purge,soft_purge,[]},
@@ -11,7 +12,9 @@
      {load_module,emqx_http_lib,brutal_purge,soft_purge,[]},
      {load_module,emqx_channel,brutal_purge,soft_purge,[]},
      {load_module,emqx_app,brutal_purge,soft_purge,[]},
-     {load_module,emqx_connection,brutal_purge,soft_purge,[]}]},
+     {load_module,emqx_connection,brutal_purge,soft_purge,[]},
+     {load_module,emqx_cm,brutal_purge,soft_purge,[]}
+    ]},
    {"4.3.1",
     [{load_module,emqx_packet,brutal_purge,soft_purge,[]},
      {load_module,emqx_ws_connection,brutal_purge,soft_purge,[]},
@@ -45,7 +48,8 @@
    {<<".*">>,[]}],
   [{"4.3.3",
     [{load_module,emqx_packet,brutal_purge,soft_purge,[]},
-     {load_module,emqx_ws_connection,brutal_purge,soft_purge,[]}
+     {load_module,emqx_ws_connection,brutal_purge,soft_purge,[]},
+     {load_module,emqx_cm,brutal_purge,soft_purge,[]}
     ]},
    {"4.3.2",
     [{load_module,emqx_packet,brutal_purge,soft_purge,[]},
@@ -53,7 +57,9 @@
      {load_module,emqx_http_lib,brutal_purge,soft_purge,[]},
      {load_module,emqx_channel,brutal_purge,soft_purge,[]},
      {load_module,emqx_app,brutal_purge,soft_purge,[]},
-     {load_module,emqx_connection,brutal_purge,soft_purge,[]}]},
+     {load_module,emqx_connection,brutal_purge,soft_purge,[]},
+     {load_module,emqx_cm,brutal_purge,soft_purge,[]}
+    ]},
    {"4.3.1",
     [{load_module,emqx_packet,brutal_purge,soft_purge,[]},
      {load_module,emqx_ws_connection,brutal_purge,soft_purge,[]},

src/emqx_cm.erl

@@ -294,6 +294,9 @@ do_discard_session(ClientId, Pid) ->
         _ : {noproc, _} -> % emqx_connection: gen_server:call
             ?tp(debug, "session_already_gone", #{pid => Pid}),
             ok;
+        _ : {'EXIT', {noproc, _}} -> % rpc_call/3
+            ?tp(debug, "session_already_gone", #{pid => Pid}),
+            ok;
         _ : {{shutdown, _}, _} ->
             ?tp(debug, "session_already_shutdown", #{pid => Pid}),
             ok;