diff --git a/src/emqx_broker.erl b/src/emqx_broker.erl
index cdf22f9d9..df5939ef5 100644
--- a/src/emqx_broker.erl
+++ b/src/emqx_broker.erl
@@ -214,7 +214,7 @@ safe_publish(Msg) when is_record(Msg, message) ->
         publish(Msg)
     catch
         _:Error:Stk->
-            ?LOG(error, "Publish error: ~p~n~s~n~p",
+            ?LOG(error, "Publish error: ~0p~n~s~n~0p",
                  [Error, emqx_message:format(Msg), Stk])
     after
         []
diff --git a/src/emqx_cm.erl b/src/emqx_cm.erl
index dd8b02e54..8224d85c9 100644
--- a/src/emqx_cm.erl
+++ b/src/emqx_cm.erl
@@ -276,7 +276,7 @@ discard_session(ClientId) when is_binary(ClientId) ->
                           _:{noproc,_}:_Stk -> ok;
                           _:{{shutdown,_},_}:_Stk -> ok;
                           _:Error:_Stk ->
-                              ?LOG(error, "Failed to discard ~p: ~p", [ChanPid, Error])
+                              ?LOG(error, "Failed to discard ~0p: ~0p", [ChanPid, Error])
                       end
               end, ChanPids)
     end.
diff --git a/src/emqx_connection.erl b/src/emqx_connection.erl
index 1f595d3fa..3554ae893 100644
--- a/src/emqx_connection.erl
+++ b/src/emqx_connection.erl
@@ -319,7 +319,7 @@ handle_msg({'$gen_call', From, Req}, State) ->
     end;
 
 handle_msg({Inet, _Sock, Data}, State) when Inet == tcp; Inet == ssl ->
-    ?LOG(debug, "RECV ~p", [Data]),
+    ?LOG(debug, "RECV ~0p", [Data]),
     Oct = iolist_size(Data),
     emqx_pd:inc_counter(incoming_bytes, Oct),
     ok = emqx_metrics:inc('bytes.received', Oct),
@@ -513,7 +513,7 @@ parse_incoming(Data, Packets, State = #state{parse_state = ParseState}) ->
             parse_incoming(Rest, [Packet|Packets], NState)
     catch
         error:Reason:Stk ->
-            ?LOG(error, "~nParse failed for ~p~n~p~nFrame data:~p",
+            ?LOG(error, "~nParse failed for ~0p~n~0p~nFrame data:~0p",
                  [Reason, Stk, Data]),
             {[{frame_error, Reason}|Packets], State}
     end.
diff --git a/src/emqx_ctl.erl b/src/emqx_ctl.erl
index b21ffde66..d2cbf9b04 100644
--- a/src/emqx_ctl.erl
+++ b/src/emqx_ctl.erl
@@ -106,7 +106,7 @@ run_command(Cmd, Args) when is_atom(Cmd) ->
                 _ -> ok
             catch
                 _:Reason:Stacktrace ->
-                    ?ERROR("CMD Error:~p, Stacktrace:~p", [Reason, Stacktrace]),
+                    ?ERROR("CMD Error:~0p, Stacktrace:~0p", [Reason, Stacktrace]),
                     {error, Reason}
             end;
         [] ->
diff --git a/src/emqx_hooks.erl b/src/emqx_hooks.erl
index 062559eb3..d079a38c3 100644
--- a/src/emqx_hooks.erl
+++ b/src/emqx_hooks.erl
@@ -165,7 +165,7 @@ safe_execute(Fun, Args) ->
         Result -> Result
     catch
         _:Reason:Stacktrace ->
-            ?LOG(error, "Failed to execute ~p: ~p", [Fun, {Reason, Stacktrace}]),
+            ?LOG(error, "Failed to execute ~0p: ~0p", [Fun, {Reason, Stacktrace}]),
             ok
     end.
 
diff --git a/src/emqx_listeners.erl b/src/emqx_listeners.erl
index 2990878dd..948c8e8d5 100644
--- a/src/emqx_listeners.erl
+++ b/src/emqx_listeners.erl
@@ -51,7 +51,7 @@ start_listener({Proto, ListenOn, Options}) ->
         {ok, _} -> io:format("Start mqtt:~s listener on ~s successfully.~n",
                              [Proto, format(ListenOn)]);
         {error, Reason} ->
-            io:format(standard_error, "Failed to start mqtt:~s listener on ~s - ~p~n!",
+            io:format(standard_error, "Failed to start mqtt:~s listener on ~s - ~0p~n!",
                       [Proto, format(ListenOn), Reason])
     end,
     StartRet.
diff --git a/src/emqx_mod_acl_internal.erl b/src/emqx_mod_acl_internal.erl
index e836bd574..e429d6899 100644
--- a/src/emqx_mod_acl_internal.erl
+++ b/src/emqx_mod_acl_internal.erl
@@ -101,6 +101,12 @@ rules_from_file(AclFile) ->
             Rules = [emqx_access_rule:compile(Term) || Term <- Terms],
             #{publish   => [Rule || Rule <- Rules, filter(publish, Rule)],
               subscribe => [Rule || Rule <- Rules, filter(subscribe, Rule)]};
+        {error, eacces} ->
+            ?LOG(alert, "Insufficient permissions to read the ~s file", [AclFile]),
+            #{};
+        {error, enoent} ->
+            ?LOG(alert, "The ~s file does not exist", [AclFile]),
+            #{};
         {error, Reason} ->
             ?LOG(alert, "Failed to read ~s: ~p", [AclFile, Reason]),
             #{}
diff --git a/src/emqx_packet.erl b/src/emqx_packet.erl
index b229a3e07..768bf79e1 100644
--- a/src/emqx_packet.erl
+++ b/src/emqx_packet.erl
@@ -442,7 +442,7 @@ format_variable(undefined, _) ->
 format_variable(Variable, undefined) ->
     format_variable(Variable);
 format_variable(Variable, Payload) ->
-    io_lib:format("~s, Payload=~p", [format_variable(Variable), Payload]).
+    io_lib:format("~s, Payload=~0p", [format_variable(Variable), Payload]).
 
 format_variable(#mqtt_packet_connect{
                  proto_ver    = ProtoVer,
@@ -460,7 +460,7 @@ format_variable(#mqtt_packet_connect{
     Format = "ClientId=~s, ProtoName=~s, ProtoVsn=~p, CleanStart=~s, KeepAlive=~p, Username=~s, Password=~s",
     Args = [ClientId, ProtoName, ProtoVer, CleanStart, KeepAlive, Username, format_password(Password)],
     {Format1, Args1} = if
-                        WillFlag -> {Format ++ ", Will(Q~p, R~p, Topic=~s, Payload=~p)",
+                        WillFlag -> {Format ++ ", Will(Q~p, R~p, Topic=~s, Payload=~0p)",
                                      Args ++ [WillQoS, i(WillRetain), WillTopic, WillPayload]};
                         true -> {Format, Args}
                        end,
diff --git a/src/emqx_plugins.erl b/src/emqx_plugins.erl
index b6e2b6156..15c4ea330 100644
--- a/src/emqx_plugins.erl
+++ b/src/emqx_plugins.erl
@@ -283,7 +283,7 @@ start_app(App, SuccFun) ->
             SuccFun(App),
             ok;
         {error, {ErrApp, Reason}} ->
-            ?LOG(error, "Load plugin ~s failed, cannot start plugin ~s for ~p", [App, ErrApp, Reason]),
+            ?LOG(error, "Load plugin ~s failed, cannot start plugin ~s for ~0p", [App, ErrApp, Reason]),
             {error, {ErrApp, Reason}}
     end.
 
diff --git a/src/emqx_pool.erl b/src/emqx_pool.erl
index 10b1adf00..49a7c2cac 100644
--- a/src/emqx_pool.erl
+++ b/src/emqx_pool.erl
@@ -107,7 +107,7 @@ handle_call(Req, _From, State) ->
 handle_cast({async_submit, Task}, State) ->
     try run(Task)
     catch _:Error:Stacktrace ->
-        ?LOG(error, "Error: ~p, ~p", [Error, Stacktrace])
+        ?LOG(error, "Error: ~0p, ~0p", [Error, Stacktrace])
     end,
     {noreply, State};
 
diff --git a/src/emqx_psk.erl b/src/emqx_psk.erl
index a74f5a390..f1170d2d9 100644
--- a/src/emqx_psk.erl
+++ b/src/emqx_psk.erl
@@ -35,6 +35,6 @@ lookup(psk, ClientPSKID, _UserState) ->
             error
     catch
         Except:Error:Stacktrace ->
-          ?LOG(error, "Lookup PSK failed, ~p: ~p", [{Except,Error}, Stacktrace]),
+          ?LOG(error, "Lookup PSK failed, ~0p: ~0p", [{Except,Error}, Stacktrace]),
           error
     end.
diff --git a/src/emqx_stats.erl b/src/emqx_stats.erl
index 95bfc88ae..7548867e5 100644
--- a/src/emqx_stats.erl
+++ b/src/emqx_stats.erl
@@ -243,7 +243,7 @@ handle_info({timeout, TRef, tick}, State = #state{timer = TRef, updates = Update
                          try UpFun()
                          catch
                              _:Error ->
-                                 ?LOG(error, "Update ~s failed: ~p", [Name, Error])
+                                 ?LOG(error, "Update ~s failed: ~0p", [Name, Error])
                          end,
                          [Update#update{countdown = I} | Acc];
                     (Update = #update{countdown = C}, Acc) ->
@@ -272,6 +272,6 @@ safe_update_element(Key, Val) ->
         true -> true
     catch
         error:badarg ->
-            ?LOG(warning, "Failed to update ~p to ~p", [Key, Val])
+            ?LOG(warning, "Failed to update ~0p to ~0p", [Key, Val])
     end.
 
diff --git a/src/emqx_tracer.erl b/src/emqx_tracer.erl
index 96dbe04d2..a2112cda3 100644
--- a/src/emqx_tracer.erl
+++ b/src/emqx_tracer.erl
@@ -65,7 +65,7 @@ trace(publish, #message{topic = <<"$SYS/", _/binary>>}) ->
     ignore;
 trace(publish, #message{from = From, topic = Topic, payload = Payload})
         when is_binary(From); is_atom(From) ->
-    emqx_logger:info(#{topic => Topic, mfa => {?MODULE, ?FUNCTION_NAME, ?FUNCTION_ARITY} }, "PUBLISH to ~s: ~p", [Topic, Payload]).
+    emqx_logger:info(#{topic => Topic, mfa => {?MODULE, ?FUNCTION_NAME, ?FUNCTION_ARITY} }, "PUBLISH to ~s: ~0p", [Topic, Payload]).
 
 %% @doc Start to trace clientid or topic.
 -spec(start_trace(trace_who(), logger:level(), string()) -> ok | {error, term()}).
diff --git a/src/emqx_ws_connection.erl b/src/emqx_ws_connection.erl
index 97fb5e623..f26bfb70e 100644
--- a/src/emqx_ws_connection.erl
+++ b/src/emqx_ws_connection.erl
@@ -200,7 +200,7 @@ websocket_init([Req, Opts]) ->
                        ?LOG(error, "Illegal cookie"),
                        undefined;
                    Error:Reason ->
-                       ?LOG(error, "Failed to parse cookie, Error: ~p, Reason ~p",
+                       ?LOG(error, "Failed to parse cookie, Error: ~0p, Reason ~0p",
                             [Error, Reason]),
                        undefined
                end,
@@ -245,7 +245,7 @@ websocket_handle({binary, Data}, State) when is_list(Data) ->
     websocket_handle({binary, iolist_to_binary(Data)}, State);
 
 websocket_handle({binary, Data}, State) ->
-    ?LOG(debug, "RECV ~p", [Data]),
+    ?LOG(debug, "RECV ~0p", [Data]),
     ok = inc_recv_stats(1, iolist_size(Data)),
     NState = ensure_stats_timer(State),
     return(parse_incoming(Data, NState));
@@ -458,7 +458,7 @@ parse_incoming(Data, State = #state{parse_state = ParseState}) ->
             parse_incoming(Rest, postpone({incoming, Packet}, NState))
     catch
         error:Reason:Stk ->
-            ?LOG(error, "~nParse failed for ~p~n~p~nFrame data: ~p",
+            ?LOG(error, "~nParse failed for ~0p~n~0p~nFrame data: ~0p",
                  [Reason, Stk, Data]),
             FrameError = {frame_error, Reason},
             postpone({incoming, FrameError}, State)