docs: fix typos

.github/ISSUE_TEMPLATE/assets/issue-handling.uml

@@ -42,7 +42,7 @@ closed --> [*]
 
 accepted -down--> assigned: priority review
 
-accepted --> needs_information: need more information\n to proceeed
+accepted --> needs_information: need more information\n to proceed
 needs_information --> accepted:  updates
 assigned --> InProgress: In sprint run\n or\n start to work on
 InProgress --> closed: issue is solved

Windows.md

@@ -6,7 +6,7 @@ NOTE: The instructions and examples are based on Windows 10.
 
 ### Visual studio for C/C++ compile and link
 
-EMQ X includes Erlang NIF (Native Implmented Function) components, implemented
+EMQ X includes Erlang NIF (Native Implemented Function) components, implemented
 in C/C++. To compile and link C/C++ libraries, the easiest way is perhaps to
 install Visual Studio.
 
@@ -58,7 +58,7 @@ environment in Windows, there are quite a few options.
 Cygwin is what we tested with.
 
 * Add `cygwin\bin` dir to `Path` environment variable
-  To do so, search for Edit environment variable in control pannel and
+  To do so, search for Edit environment variable in control panel and
   add `C:\tools\cygwin\bin` (depending on the location where it was installed)
   to `Path` list.
 
@@ -107,8 +107,8 @@ scoop install git curl make cmake jq zip unzip
   variables are not set. Make sure `vcvarsall.bat x86_amd64` is executed prior to the `make` command
 
 * `link: extra operand 'some.obj'`
-  This is likely due ot the usage of GNU `lnik.exe` but not the one from Visual Studio.
-  Exeucte `link.exe --version` to inspect which one is in use. The one installed from
+  This is likely due to the usage of GNU `lnik.exe` but not the one from Visual Studio.
+  Execute `link.exe --version` to inspect which one is in use. The one installed from
   Visual Studio should print out `Microsoft (R) Incremental Linker`.
   To fix it, Visual Studio's bin paths should be ordered prior to Cygwin's (or similar installation's)
   bin paths in `Path` environment variable.

apps/emqx/etc/emqx.conf

@@ -896,7 +896,7 @@ conn_congestion {
   ##
   ## Sometimes the mqtt connection (usually an MQTT subscriber) may
   ## get "congested" because there're too many packets to sent.
-  ## The socket trys to buffer the packets until the buffer is
+  ## The socket tries to buffer the packets until the buffer is
   ## full. If more packets comes after that, the packets will be
   ## "pending" in a queue and we consider the connection is
   ## "congested".

apps/emqx/src/emqx_authentication.erl

@@ -120,7 +120,7 @@
                        atom() => term()}.
 
 %% @doc check_config takes raw config from config file,
-%% parse and validate it, and reutrn parsed result.
+%% parse and validate it, and return parsed result.
 -callback check_config(config()) -> config().
 
 -callback create(AuthenticatorID, Config)

apps/emqx/src/emqx_config.erl

@@ -112,9 +112,9 @@
     post_config_update => #{module() => any()}
 }.
 
-%% raw_config() is the config that is NOT parsed and tranlated by hocon schema
+%% raw_config() is the config that is NOT parsed and translated by hocon schema
 -type raw_config() :: #{binary() => term()} | list() | undefined.
-%% config() is the config that is parsed and tranlated by hocon schema
+%% config() is the config that is parsed and translated by hocon schema
 -type config() :: #{atom() => term()} | list() | undefined.
 -type app_envs() :: [proplists:property()].
 

apps/emqx/src/emqx_config_handler.erl

@@ -70,7 +70,7 @@ stop() ->
 -spec update_config(module(), emqx_config:config_key_path(), emqx_config:update_args()) ->
     {ok, emqx_config:update_result()} | {error, emqx_config:update_error()}.
 update_config(SchemaModule, ConfKeyPath, UpdateArgs) ->
-    %% force covert the path to a list of atoms, as there maybe some wildcard names/ids in the path
+    %% force convert the path to a list of atoms, as there maybe some wildcard names/ids in the path
     AtomKeyPath = [atom(Key) || Key <- ConfKeyPath],
     gen_server:call(?MODULE, {change_config, SchemaModule, AtomKeyPath, UpdateArgs}, infinity).
 

apps/emqx/src/emqx_connection.erl

@@ -880,7 +880,7 @@ handle_cast(Req, State) ->
 -type check_succ_handler() ::
         fun((any(), list(any()), state()) -> _).
 
-%% check limiters, if successed call WhenOk with Data and Msgs
+%% check limiters, if succeeded call WhenOk with Data and Msgs
 %% Data is the data to be processed
 %% Msgs include the next msg which after Data processed
 -spec check_limiter(list({pos_integer(), limiter_type()}),

apps/emqx/src/emqx_limiter/src/emqx_limiter.app.src

@@ -1,6 +1,6 @@
 %% -*- mode: erlang -*-
 {application, emqx_limiter,
- [{description, "EMQ X Hierachical Limiter"},
+ [{description, "EMQ X Hierarchical Limiter"},
   {vsn, "1.0.0"}, % strict semver, bump manually!
   {modules, []},
   {registered, [emqx_limiter_sup]},

apps/emqx/src/emqx_limiter/src/emqx_limiter_server.erl

@@ -338,11 +338,11 @@ longitudinal(#{id := Id,
         end,
 
     case lists:min([ShouldAlloc, Flow, Capacity]) of
-        Avaiable when Avaiable > 0 ->
+        Available when Available > 0 ->
             %% XXX if capacity is infinity, and flow always > 0, the value in
             %% counter will be overflow at some point in the future, do we need
             %% to deal with this situation???
-            {Inc, Node2} = emqx_limiter_correction:add(Avaiable, Node),
+            {Inc, Node2} = emqx_limiter_correction:add(Available, Node),
             counters:add(Counter, Index, Inc),
 
             {Inc,

apps/emqx/src/emqx_olp.erl

@@ -53,7 +53,7 @@ is_overloaded() ->
 %% @doc Backoff with a delay if the system is overloaded, for tasks that could be deferred.
 %%      returns `false' if backoff didn't happen, the system is cool.
 %%      returns `ok' if backoff is triggered and get unblocked when the system is cool.
-%%      returns `timeout' if backoff is trigged but get unblocked due to timeout as configured.
+%%      returns `timeout' if backoff is triggered but get unblocked due to timeout as configured.
 -spec backoff(Zone :: atom()) -> ok | false | timeout.
 backoff(Zone) ->
   case emqx_config:get_zone_conf(Zone, [?overload_protection]) of
@@ -96,12 +96,12 @@ backoff_new_conn(Zone) ->
 status() ->
   is_overloaded().
 
-%% @doc turn off backgroud runq check.
+%% @doc turn off background runq check.
 -spec disable() -> ok | {error, timeout}.
 disable() ->
   load_ctl:stop_runq_flagman(5000).
 
-%% @doc turn on backgroud runq check.
+%% @doc turn on background runq check.
 -spec enable() -> {ok, pid()} | {error, running | restarting | disabled}.
 enable() ->
  case load_ctl:restart_runq_flagman() of

apps/emqx/src/emqx_pqueue.erl

@@ -33,7 +33,7 @@
 %% When the queue contains items with non-zero priorities, it is
 %% represented as a sorted kv list with the inverted Priority as the
 %% key and an ordinary queue as the value. Here again we use our own
-%% ordinary queue implemention for efficiency, often making recursive
+%% ordinary queue implementation for efficiency, often making recursive
 %% calls into the same function knowing that ordinary queues represent
 %% a base case.
 

apps/emqx/src/emqx_release.erl

@@ -70,7 +70,7 @@ edition(Desc) ->
 %% @doc Return the release version.
 version() ->
     case lists:keyfind(emqx_vsn, 1, ?MODULE:module_info(compile)) of
-        false -> %% For TEST build or depedency build.
+        false -> %% For TEST build or dependency build.
             build_vsn();
         {_, Vsn} -> %% For emqx release build
             VsnStr = build_vsn(),

apps/emqx/src/emqx_schema.erl

@@ -107,7 +107,7 @@ and can not be deleted."""
        sc(ref("mqtt"),
          #{ desc =>
 """Global MQTT configuration.<br>
-The configs here work as default values which can be overriden
+The configs here work as default values which can be overridden
 in <code>zone</code> configs"""
           })}
     , {?EMQX_AUTHENTICATION_CONFIG_ROOT_NAME,
@@ -1045,7 +1045,7 @@ when deactivated, but after the retention time.
 
 fields("latency_stats") ->
     [ {"samples", sc(integer(), #{default => 10,
-                                  desc => "the number of smaples for calculate the average latency of delivery"})}
+                                  desc => "the number of samples for calculate the average latency of delivery"})}
     ];
 fields("trace") ->
     [ {"payload_encode", sc(hoconsc:enum([hex, text, hidden]), #{

apps/emqx/src/emqx_session.erl

@@ -119,14 +119,14 @@
           mqueue :: emqx_mqueue:mqueue(),
           %% Next packet id of the session
           next_pkt_id = 1 :: emqx_types:packet_id(),
-          %% Retry interval for redelivering QoS1/2 messages (Unit: millsecond)
+          %% Retry interval for redelivering QoS1/2 messages (Unit: millisecond)
           retry_interval :: timeout(),
           %% Client -> Broker: QoS2 messages received from the client, but
           %% have not been completely acknowledged
           awaiting_rel :: map(),
           %% Maximum number of awaiting QoS2 messages allowed
           max_awaiting_rel :: non_neg_integer() | infinity,
-          %% Awaiting PUBREL Timeout (Unit: millsecond)
+          %% Awaiting PUBREL Timeout (Unit: millisecond)
           await_rel_timeout :: timeout(),
           %% Created at
           created_at :: pos_integer(),

apps/emqx/src/emqx_tls_lib.erl

@@ -310,7 +310,7 @@ is_valid_string(Binary) when is_binary(Binary) ->
         _Otherwise -> false
     end.
 
-%% Check if it is a valid PEM formated key.
+%% Check if it is a valid PEM formatted key.
 is_pem(MaybePem) ->
     try public_key:pem_decode(MaybePem) =/= []
     catch _ : _ -> false

apps/emqx/src/emqx_trie.erl

@@ -136,7 +136,7 @@ delete(Topic, Trie) when is_binary(Topic) ->
         false -> ok
     end.
 
-%% @doc Find trie nodes that matchs the topic name.
+%% @doc Find trie nodes that matches the topic name.
 -spec(match(emqx_types:topic()) -> list(emqx_types:topic())).
 match(Topic) when is_binary(Topic) ->
     match(Topic, ?TRIE).

apps/emqx/test/emqx_logger_SUITE.erl

@@ -114,7 +114,7 @@ t_start_stop_log_handler2(_) ->
     %% stop a no exists handler returns {not_started, Id}
     ?assertMatch({error, {not_started, invalid_handler_id}},
                  ?LOGGER:stop_log_handler(invalid_handler_id)),
-    %% stop a handler that is already stopped retuns {not_started, Id}
+    %% stop a handler that is already stopped returns {not_started, Id}
     ok = ?LOGGER:stop_log_handler(default),
     ?assertMatch({error, {not_started, default}},
                  ?LOGGER:stop_log_handler(default)).

apps/emqx/test/emqx_ratelimiter_SUITE.erl

@@ -563,7 +563,7 @@ client_try_check(Need, #client{counter = Counter,
 
 %% XXX not a god test, because client's rate maybe bigger than global rate
 %% so if client' rate = infinity
-%% client's divisible should be true or capacity must be bigger than number of each comsume
+%% client's divisible should be true or capacity must be bigger than number of each consume
 client_random_val(infinity) ->
     1000;
 

apps/emqx/test/emqx_request_responser_SUITE.erl

@@ -49,9 +49,9 @@ request_response_per_qos(QoS) ->
                      I = b2i(ReqBin),
                      i2b(I * I)
               end,
-    {ok, Responser} = emqx_request_handler:start_link(ReqTopic, QoS, Square,
+    {ok, Responder} = emqx_request_handler:start_link(ReqTopic, QoS, Square,
                                                       [{proto_ver, v5},
-                                                       {clientid, <<"responser">>}
+                                                       {clientid, <<"responder">>}
                                                       ]),
     ok = emqx_request_sender:send(Requester, ReqTopic, RspTopic, <<"corr-1">>, <<"2">>, QoS),
     receive
@@ -64,7 +64,7 @@ request_response_per_qos(QoS) ->
             erlang:error(timeout)
     end,
     ok = emqx_request_sender:stop(Requester),
-    ok = emqx_request_handler:stop(Responser).
+    ok = emqx_request_handler:stop(Responder).
 
 b2i(B) -> binary_to_integer(B).
 i2b(I) -> integer_to_binary(I).

apps/emqx/test/emqx_takeover_SUITE.erl

@@ -27,7 +27,7 @@
 -define(CNT, 100).
 
 %%--------------------------------------------------------------------
-%% Inital funcs
+%% Initial funcs
 
 all() -> emqx_common_test_helpers:all(?MODULE).
 

apps/emqx/test/props/prop_emqx_json.erl

@@ -68,7 +68,7 @@ prop_object_map_to_map() ->
                 true
             end).
 
-%% The duplicated key will be overriden
+%% The duplicated key will be overridden
 prop_object_proplist_to_map() ->
     ?FORALL(T0, json_object(),
            begin

apps/emqx_authn/src/emqx_authn_api.erl

@@ -974,7 +974,7 @@ authenticator_examples() ->
             }
         },
         'password-based:http' => #{
-            summary => <<"Password-based authentication througth external HTTP API">>,
+            summary => <<"Password-based authentication through external HTTP API">>,
             value => #{
                 mechanism => <<"password-based">>,
                 backend => <<"http">>,

apps/emqx_authn/src/emqx_authn_schema.erl

@@ -46,9 +46,9 @@ authenticator_type() ->
 config_refs(Modules) ->
     lists:append([Module:refs() || Module <- Modules]).
 
-%% authn is a core functionality however implemented outside fo emqx app
+%% authn is a core functionality however implemented outside of emqx app
 %% in emqx_schema, 'authentication' is a map() type which is to allow
-%% EMQ X more plugable.
+%% EMQ X more pluggable.
 root_type() ->
     hoconsc:array(authenticator_type()).
 

apps/emqx_authn/test/emqx_authn_mongo_tls_SUITE.erl

@@ -63,7 +63,7 @@ end_per_suite(_Config) ->
 %% Tests
 %%------------------------------------------------------------------------------
 
-%% emqx_connector_mongo connects asyncronously,
+%% emqx_connector_mongo connects asynchronously,
 %% so we check failure/success indirectly (through snabbkaffe).
 
 %% openssl s_client -tls1_2 -cipher ECDHE-RSA-AES256-GCM-SHA384 \

apps/emqx_authz/src/emqx_authz.erl

@@ -362,7 +362,7 @@ type(postgresql) -> postgresql;
 type(<<"postgresql">>) -> postgresql;
 type('built-in-database') -> 'built-in-database';
 type(<<"built-in-database">>) -> 'built-in-database';
-%% should never happend if the input is type-checked by hocon schema
+%% should never happen if the input is type-checked by hocon schema
 type(Unknown) -> error({unknown_authz_source_type, Unknown}).
 
 %% @doc where the acl.conf file is stored.

apps/emqx_authz/src/emqx_authz_schema.erl

@@ -76,7 +76,7 @@ ordered to form a chain of access controls.<br>
 When authorizing a publish or subscribe action, the configured
 sources are checked in order. When checking an ACL source,
 in case the client (identified by username or client ID) is not found,
-it moves on to the next source. And it stops immediatly
+it moves on to the next source. And it stops immediately
 once an 'allow' or 'deny' decision is returned.<br>
 
 If the client is not found in any of the sources,

apps/emqx_conf/etc/emqx_conf.conf

@@ -230,7 +230,7 @@ cluster {
   ## Cluster using etcd
   ##----------------------------------------------------------------
   etcd {
-    ## Etcd server list, seperated by ','.
+    ## Etcd server list, separated by ','.
     ##
     ## @doc cluster.etcd.server
     ## ValueType: URL
@@ -279,7 +279,7 @@ cluster {
   ## Cluster using Kubernetes
   ##----------------------------------------------------------------
   k8s {
-    ## Kubernetes API server list, seperated by ','.
+    ## Kubernetes API server list, separated by ','.
     ##
     ## @doc cluster.k8s.apiserver
     ## ValueType: URL
@@ -459,7 +459,7 @@ log {
     ## Default: true
     overload_kill.enable = true
 
-    ## The max allowed queue length before killing the log hanlder.
+    ## The max allowed queue length before killing the log handler.
     ##
     ## Log overload protection parameter. This is the maximum allowed queue
     ## length. If the message queue grows larger than this, the handler
@@ -471,7 +471,7 @@ log {
     ## Default: 20000
     overload_kill.qlen = 20000
 
-    ## The max allowed memory size before killing the log hanlder.
+    ## The max allowed memory size before killing the log handler.
     ##
     ## Log overload protection parameter. This is the maximum memory size
     ## that the handler process is allowed to use. If the handler grows
@@ -482,7 +482,7 @@ log {
     ## Default: 30MB
     overload_kill.mem_size = 30MB
 
-    ## Restart the log hanlder after some seconds.
+    ## Restart the log handler after some seconds.
     ##
     ## Log overload protection parameter. If the handler is terminated,
     ## it restarts automatically after a delay specified in seconds.
@@ -669,7 +669,7 @@ log {
     ## Default: true
     overload_kill.enable = true
 
-    ## The max allowed queue length before killing the log hanlder.
+    ## The max allowed queue length before killing the log handler.
     ##
     ## Log overload protection parameter. This is the maximum allowed queue
     ## length. If the message queue grows larger than this, the handler
@@ -681,7 +681,7 @@ log {
     ## Default: 20000
     overload_kill.qlen = 20000
 
-    ## The max allowed memory size before killing the log hanlder.
+    ## The max allowed memory size before killing the log handler.
     ##
     ## Log overload protection parameter. This is the maximum memory size
     ## that the handler process is allowed to use. If the handler grows
@@ -692,7 +692,7 @@ log {
     ## Default: 30MB
     overload_kill.mem_size = 30MB
 
-    ## Restart the log hanlder after some seconds.
+    ## Restart the log handler after some seconds.
     ##
     ## Log overload protection parameter. If the handler is terminated,
     ## it restarts automatically after a delay specified in seconds.

apps/emqx_conf/etc/emqx_conf.md

@@ -58,7 +58,7 @@ There are 4 complex data types in EMQ X's HOCON config:
 
 1. Struct: Named using an unquoted string, followed by a pre-defined list of fields,
    fields can not start with a number, and are only allowed to use
-   lowercase letters and underscores as word separater.
+   lowercase letters and underscores as word separator.
 1. Map: Map is like Struct, however the fields are not pre-defined.
    1-based index number can also be used as map keys for an alternative
    representation of an Array.
@@ -67,7 +67,7 @@ There are 4 complex data types in EMQ X's HOCON config:
 
 ### Primitive Data Types
 
-Complex types define data 'boxes' wich may contain other complex data
+Complex types define data 'boxes' which may contain other complex data
 or primitive values.
 There are quite some different primitive types, to name a fiew:
 
@@ -82,7 +82,7 @@ There are quite some different primitive types, to name a fiew:
 * ...
 
 The primitive types are mostly self-describing, some are built-in, such
-as `atom()`, some are defiend in EMQ X modules, such as `emqx_schema:duration()`.
+as `atom()`, some are defined in EMQ X modules, such as `emqx_schema:duration()`.
 
 ### Config Paths
 
@@ -133,14 +133,14 @@ because the field name is `enable`, not `enabled`.
 
 ### Config overlay rules
 
-HOCON objects are overlayed, in general:
+HOCON objects are overlaid, in general:
 
 - Within one file, objects defined 'later' recursively override objects defined 'earlier'
 - When layered, 'later' (hihger lalyer) objects override objects defined 'earlier' (lower layer)
 
 Below are more detailed rules.
 
-#### Struct Fileds
+#### Struct Fields
 
 Later config values overwrites earlier values.
 For example, in below config, the last line `debug` overwrites `errro` for
@@ -171,7 +171,7 @@ zone {
 }
 
 ## The maximum packet size can be defined as above,
-## then overriden as below
+## then overridden as below
 
 zone.zone1.mqtt.max_packet_size = 10M
 ```

apps/emqx_conf/src/emqx_conf_schema.erl

@@ -328,7 +328,7 @@ Select the backend for the embedded database.<br/>
 <strong>Important!</strong> This setting should be the same on all nodes in the cluster.<br/>
 <strong>Important!</strong> Changing this setting in the runtime is not allowed.<br/>
 <code>mnesia</code> is the default backend, that offers decent performance in small clusters.<br/>
-<code>rlog</code> is a new experimantal backend that is suitable for very large clusters.
+<code>rlog</code> is a new experimental backend that is suitable for very large clusters.
 """
            })}
     , {"role",
@@ -836,7 +836,7 @@ emqx_schema_high_prio_roots() ->
              sc(hoconsc:ref("authorization"),
              #{ desc => """
 Authorization a.k.a ACL.<br>
-In EMQ X, MQTT client access control is extremly flexible.<br>
+In EMQ X, MQTT client access control is extremely flexible.<br>
 An out of the box set of authorization data sources are supported.
 For example,<br>
 'file' source is to support concise and yet generic ACL rules in a file;<br>

apps/emqx_connector/src/emqx_connector_http.erl

@@ -91,7 +91,7 @@ For example: http://localhost:9901/
     , {pool_type,
         sc(pool_type(),
            #{ default => random
-            , desc => "The type of the pool. Canbe one of random, hash"
+            , desc => "The type of the pool. Can be one of random, hash"
             })}
     , {pool_size,
         sc(non_neg_integer(),
@@ -216,12 +216,12 @@ on_query(InstId, {KeyOrNum, Method, Request, Timeout}, AfterQuery,
         {ok, StatusCode, _, _} when StatusCode >= 200 andalso StatusCode < 300 ->
             emqx_resource:query_success(AfterQuery);
         {ok, StatusCode, _} ->
-            ?SLOG(error, #{msg => "http connector do reqeust, received error response",
+            ?SLOG(error, #{msg => "http connector do request, received error response",
                            request => NRequest, connector => InstId,
                            status_code => StatusCode}),
             emqx_resource:query_failed(AfterQuery);
         {ok, StatusCode, _, _} ->
-            ?SLOG(error, #{msg => "http connector do reqeust, received error response",
+            ?SLOG(error, #{msg => "http connector do request, received error response",
                            request => NRequest, connector => InstId,
                            status_code => StatusCode}),
             emqx_resource:query_failed(AfterQuery)

apps/emqx_connector/src/mqtt/emqx_connector_mqtt_mod.erl

@@ -148,7 +148,7 @@ send(#{client_pid := ClientPid} = Conn, [Msg | Rest], PktIds) ->
         {ok, PktId} ->
             send(Conn, Rest, [PktId | PktIds]);
         {error, Reason} ->
-            %% NOTE: There is no partial sucess of a batch and recover from the middle
+            %% NOTE: There is no partial success of a batch and recover from the middle
             %% only to retry all messages in one batch
             {error, Reason}
     end.

apps/emqx_connector/src/mqtt/emqx_connector_mqtt_schema.erl

@@ -48,7 +48,7 @@ The mode of the MQTT Bridge. Can be one of 'cluster_singleton' or 'cluster_share
 In 'cluster_singleton' node, all messages toward the remote broker go through the same
 MQTT connection.<br>
 - cluster_shareload: create an MQTT connection on each node in the emqx cluster.<br>
-In 'cluster_shareload' mode, the incomming load from the remote broker is shared by
+In 'cluster_shareload' mode, the incoming load from the remote broker is shared by
 using shared subscription.<br>
 Note that the 'clientid' is suffixed by the node name, this is to avoid
 clientid conflicts between different nodes. And we can only use shared subscription

apps/emqx_connector/src/mqtt/emqx_connector_mqtt_worker.erl

@@ -45,7 +45,7 @@
 %%
 %% (0): auto or manual start
 %% (1): retry timeout
-%% (2): successfuly connected to remote node/cluster
+%% (2): successfully connected to remote node/cluster
 %% (3): received {disconnected, Reason} OR
 %%      failed to send to remote node/cluster.
 %%
@@ -53,7 +53,7 @@
 %% local topics, and the underlying `emqx_bridge_connect' may subscribe to
 %% multiple remote topics, however, worker/connections are not designed
 %% to support automatic load-balancing, i.e. in case it can not keep up
-%% with the amount of messages comming in, administrator should split and
+%% with the amount of messages coming in, administrator should split and
 %% balance topics between worker/connections manually.
 %%
 %% NOTES:

apps/emqx_connector/test/emqx_connector_mqtt_worker_tests.erl

@@ -128,7 +128,7 @@ manual_start_stop_test() ->
         Config0 = make_config(Ref, TestPid, {ok, #{client_pid =>  TestPid}}),
         Config = Config0#{start_type := manual},
         {ok, Pid} = emqx_connector_mqtt_worker:start_link(Config#{name => BridgeName}),
-        %% call ensure_started again should yeld the same result
+        %% call ensure_started again should yield the same result
         ok = emqx_connector_mqtt_worker:ensure_started(BridgeName),
         emqx_connector_mqtt_worker:ensure_stopped(BridgeName),
         emqx_metrics:stop(),

apps/emqx_dashboard/README.md

@@ -54,7 +54,7 @@ Build
 
 make && make ct
 
-Configurtion
+Configuration
 ------------
 
 ```

apps/emqx_dashboard/src/emqx_dashboard_schema.erl

@@ -61,7 +61,7 @@ default_password(nullable) -> false;
 default_password(sensitive) -> true;
 default_password(desc) -> """
 The initial default password for dashboard 'admin' user.
-For safty, it should be changed as soon as possible.""";
+For safety, it should be changed as soon as possible.""";
 default_password(_) -> undefined.
 
 cors(type) -> boolean();

apps/emqx_dashboard/src/emqx_dashboard_swagger.erl

@@ -481,7 +481,7 @@ typename_to_spec(Name, Mod) ->
     Spec2 = typerefl_array(Spec1, Name, Mod),
     Spec3 = integer(Spec2, Name),
     Spec3 =:= nomatch andalso
-                 throw({error, #{msg => <<"Unsupport Type">>, type => Name, module => Mod}}),
+                 throw({error, #{msg => <<"Unsupported Type">>, type => Name, module => Mod}}),
              Spec3.
 
 range(Name) ->

apps/emqx_exhook/README.md

@@ -1,6 +1,6 @@
 # emqx_exhook
 
-The `emqx_exhook` extremly enhance the extensibility for EMQ X. It allow using an others programming language to mount the hooks intead of erlang.
+The `emqx_exhook` extremely enhance the extensibility for EMQ X. It allow using an others programming language to mount the hooks instead of erlang.
 
 ## Feature
 

apps/emqx_exhook/priv/protos/exhook.proto

@@ -236,10 +236,10 @@ message EmptySuccess { }
 
 message ValuedResponse {
 
-  // The responsed value type
-  //  - contiune: Use the responsed value and execute the next hook
-  //  - ignore: Ignore the responsed value
-  //  - stop_and_return: Use the responsed value and stop the chain executing
+  // The responded value type
+  //  - contiune: Use the responded value and execute the next hook
+  //  - ignore: Ignore the responded value
+  //  - stop_and_return: Use the responded value and stop the chain executing
   enum ResponsedType {
 
     CONTINUE = 0;

apps/emqx_exhook/src/emqx_exhook_server.erl

@@ -94,7 +94,7 @@ load(Name, #{request_timeout := Timeout, failed_action := FailedAction} = Opts)
         {ok, _ChannPoolPid} ->
             case do_init(Name, ReqOpts) of
                 {ok, HookSpecs} ->
-                    %% Reigster metrics
+                    %% Register metrics
                     Prefix = lists:flatten(io_lib:format("exhook.~ts.", [Name])),
                     ensure_metrics(Prefix, HookSpecs),
                     %% Ensure hooks

apps/emqx_gateway/README.md

@@ -4,7 +4,7 @@
 
 ## Concept
 
-    EMQ X Gateway Managment
+    EMQ X Gateway Management
      - Gateway-Registry (or Gateway Type)
         - *Load
         - *UnLoad
@@ -317,7 +317,7 @@ emqx_ctl gateway-banned
 emqx_ctl gateway-metrics [<GatewayId>]
 ```
 
-#### Mangement by HTTP-API/Dashboard/
+#### Management by HTTP-API/Dashboard/
 
 #### How to integrate a protocol to your platform
 

apps/emqx_gateway/etc/emqx_gateway.conf.example

@@ -9,7 +9,7 @@ gateway.stomp {
   idle_timeout = 30s
 
   ## To control whether write statistics data into ETS table
-  ## for dashbord to read.
+  ## for dashboard to read.
   enable_stats = true
 
   ## When publishing or subscribing, prefix all topics with a mountpoint string.
@@ -93,7 +93,7 @@ gateway.coap {
   idle_timeout = 30s
 
   ## To control whether write statistics data into ETS table
-  ## for dashbord to read.
+  ## for dashboard to read.
   enable_stats = true
 
   ## When publishing or subscribing, prefix all topics with a mountpoint string.
@@ -112,7 +112,7 @@ gateway.coap {
   ## The type of delivered coap message can be set to:
   ##  - non: Non-confirmable
   ##  - con: Confirmable
-  ##  - qos: Mapping from QoS type of the recevied message.
+  ##  - qos: Mapping from QoS type of the received message.
   ##         QoS0 -> non,  QoS1,2 -> con.
   ##
   ## Enum: non | con | qos
@@ -184,7 +184,7 @@ gateway.mqttsn {
   idle_timeout = 30s
 
   ## To control whether write statistics data into ETS table
-  ## for dashbord to read.
+  ## for dashboard to read.
   enable_stats = true
 
   ## When publishing or subscribing, prefix all topics with a mountpoint string.
@@ -252,7 +252,7 @@ gateway.lwm2m {
   idle_timeout = 30s
 
   ## To control whether write statistics data into ETS table
-  ## for dashbord to read.
+  ## for dashboard to read.
   enable_stats = true
 
   ## When publishing or subscribing, prefix all topics with a mountpoint string.
@@ -313,7 +313,7 @@ gateway.exproto {
   idle_timeout = 30s
 
   ## To control whether write statistics data into ETS table
-  ## for dashbord to read.
+  ## for dashboard to read.
   enable_stats = true
 
   ## When publishing or subscribing, prefix all topics with a mountpoint string.

apps/emqx_gateway/include/emqx_gateway.hrl

@@ -19,7 +19,7 @@
 
 -type gateway_name() :: atom().
 
-%% @doc The Gateway defination
+%% @doc The Gateway definition
 -type gateway() ::
         #{ name    := gateway_name()
          %% Description

apps/emqx_gateway/src/bhvrs/emqx_gateway_channel.erl

@@ -25,7 +25,7 @@
 %%--------------------------------------------------------------------
 %% Info & Stats
 
-%% @doc Get the channel detailed infomation.
+%% @doc Get the channel detailed information.
 -callback info(channel()) -> emqx_types:infos().
 
 -callback info(Key :: atom() | [atom()], channel()) -> any().

apps/emqx_gateway/src/bhvrs/emqx_gateway_conn.erl

@@ -14,7 +14,7 @@
 %% limitations under the License.
 %%--------------------------------------------------------------------
 
-%% @doc The behavior abstrat for TCP based gateway conn
+%% @doc The behavior abstract for TCP based gateway conn
 -module(emqx_gateway_conn).
 
 -include_lib("emqx/include/types.hrl").
@@ -837,7 +837,7 @@ activate_socket(State = #state{sockstate = blocked}) ->
 activate_socket(State = #state{socket   = Socket,
                                active_n = N}) ->
     %% FIXME: Works on dtls/udp ???
-    %%        How to hanlde buffer?
+    %%        How to handle buffer?
     case esockd_setopts(Socket, [{active, N}]) of
         ok -> {ok, State#state{sockstate = running}};
         Error -> Error

apps/emqx_gateway/src/coap/README.md

@@ -133,7 +133,7 @@ The server manages the client through the ClientId. If the ClientId is wrong, EM
     -   clientid := client uid
     -   token
 
-    Resonse:
+    Response:
 
     -   2.01 "Deleted" when success
     -   4.00 "Bad Request" when error
@@ -303,7 +303,7 @@ CoAP gateway uses some options in query string to conversion between MQTT CoAP.
 
 2.  Session
 
-    Manager the "Transport Manager" "Observe Resouces Manger" and next message id
+    Manager the "Transport Manager" "Observe Resources Manager" and next message id
 
 3.  Transport Mnager
 

apps/emqx_gateway/src/coap/emqx_coap_channel.erl

@@ -244,7 +244,7 @@ handle_call({subscribe, Topic, SubOpts}, _From,
 
     _ = run_hooks(Ctx, 'session.subscribed',
                   [ClientInfo, MountedTopic, NSubOpts]),
-    %% modifty session state
+    %% modify session state
     SubReq = {Topic, Token},
     TempMsg = #coap_message{type = non},
     %% FIXME: The subopts is not used for emqx_coap_session
@@ -264,7 +264,7 @@ handle_call({unsubscribe, Topic}, _From,
     _ = run_hooks(Ctx, 'session.unsubscribe',
                   [ClientInfo, MountedTopic, #{}]),
 
-    %% modifty session state
+    %% modify session state
     UnSubReq = Topic,
     TempMsg = #coap_message{type = non},
     Result  = emqx_coap_session:process_subscribe(

apps/emqx_gateway/src/coap/emqx_coap_tm.erl

@@ -66,7 +66,7 @@
           outgoing => coap_message(),
           timeouts => list(ttimeout()),
           has_sub  => undefined | sub_register(),
-          transport => emqx_coap_transport:transprot()}.
+          transport => emqx_coap_transport:transport()}.
 
 -define(TOKEN_ID(T), {token, T}).
 

apps/emqx_gateway/src/emqx_gateway_api_clients.erl

@@ -423,7 +423,7 @@ schema("/gateway/:name/clients") ->
 schema("/gateway/:name/clients/:clientid") ->
     #{ 'operationId' => clients_insta
      , get =>
-        #{ description => <<"Get the gateway client infomation">>
+        #{ description => <<"Get the gateway client information">>
          , parameters => params_client_insta()
          , responses =>
             ?STANDARD_RESP(#{200 => schema_client()})

apps/emqx_gateway/src/emqx_gateway_cli.erl

@@ -111,7 +111,7 @@ gateway(_) ->
       [ {"gateway list",
            "List all gateway"}
       , {"gateway lookup <Name>",
-           "Lookup a gateway detailed informations"}
+           "Lookup a gateway detailed information"}
       , {"gateway load   <Name> <JsonConf>",
            "Load a gateway with config"}
       , {"gateway unload <Name>",

apps/emqx_gateway/src/emqx_gateway_cm.erl

@@ -111,7 +111,7 @@ procname(GwName) ->
         ChannInfoTab :: atom()}.
 cmtabs(GwName) ->
     { tabname(chan, GwName)   %% Record: {ClientId, Pid}
-    , tabname(conn, GwName)   %% Recrod: {{ClientId, Pid}, ConnMod}
+    , tabname(conn, GwName)   %% Record: {{ClientId, Pid}, ConnMod}
     , tabname(info, GwName)   %% Record: {{ClientId, Pid}, Info, Stats}
     }.
 

apps/emqx_gateway/src/emqx_gateway_cm_registry.erl

@@ -45,7 +45,7 @@
 
 -record(channel, {chid, pid}).
 
-%% @doc Start the global channel registry for the gived gateway name.
+%% @doc Start the global channel registry for the given gateway name.
 -spec(start_link(gateway_name()) -> gen_server:startlink_ret()).
 start_link(Name) ->
     gen_server:start_link(?MODULE, [Name], []).

apps/emqx_gateway/src/emqx_gateway_insta_sup.erl

@@ -223,7 +223,7 @@ detailed_gateway_info(State) ->
 %% There are two layer authentication configs
 %%       stomp.authn
 %%           /                   \
-%%   listeners.tcp.defautl.authn  *.ssl.default.authn
+%%   listeners.tcp.default.authn  *.ssl.default.authn
 %%
 
 init_authn(GwName, Config) ->

apps/emqx_gateway/src/emqx_gateway_registry.erl

@@ -75,7 +75,7 @@ reg(Name, RgOpts) ->
 
 -spec unreg(gateway_name()) -> ok | {error, any()}.
 unreg(Name) ->
-    %% TODO: Checking ALL INSTACE HAS STOPPED
+    %% TODO: Checking ALL INSTANCE HAS STOPPED
     call({unreg, Name}).
 
 %% TODO:

apps/emqx_gateway/src/emqx_gateway_schema.erl

@@ -186,7 +186,7 @@ received on an observed topic.
 The type of delivered coap message can be set to:<br>
 1. non: Non-confirmable;<br>
 2. con: Confirmable;<br>
-3. qos: Mapping from QoS type of recevied message, QoS0 -> non, QoS1,2 -> con"
+3. qos: Mapping from QoS type of received message, QoS0 -> non, QoS1,2 -> con"
            })}
     , {subscribe_qos,
        sc(hoconsc:union([qos0, qos1, qos2, coap]),
@@ -222,7 +222,7 @@ fields(lwm2m) ->
        sc(binary(),
           #{ default =>"etc/lwm2m_xml"
            , nullable => false
-           , desc => "The Directory for LwM2M Resource defination"
+           , desc => "The Directory for LwM2M Resource definition"
            })}
     , {lifetime_min,
        sc(duration(),

apps/emqx_gateway/src/exproto/README.md

@@ -1,6 +1,6 @@
 # emqx-exproto
 
-The `emqx_exproto` extremly enhance the extensibility for EMQ X. It allow using an others programming language to **replace the protocol handling layer in EMQ X Broker**.
+The `emqx_exproto` extremely enhance the extensibility for EMQ X. It allow using an others programming language to **replace the protocol handling layer in EMQ X Broker**.
 
 ## Feature
 

apps/emqx_gateway/src/exproto/emqx_exproto_gsvr.erl

@@ -169,7 +169,7 @@ call(ConnStr, Req) ->
                           , reason => {Class, Reason}
                           , stacktrace => Stk
                           }),
-            {error, ?RESP_UNKNOWN, <<"Unkwown crashs">>}
+            {error, ?RESP_UNKNOWN, <<"Unknown crashes">>}
     end.
 
 %%--------------------------------------------------------------------

apps/emqx_gateway/src/exproto/emqx_exproto_impl.erl

@@ -137,7 +137,7 @@ start_grpc_server(GwName, Options = #{bind := ListenOn}) ->
             console_print("Start ~ts gRPC server on ~p successfully.~n",
                           [GwName, ListenOn]);
         {error, Reason} ->
-            ?ELOG("Falied to start ~ts gRPC server on ~p, reason: ~p",
+            ?ELOG("Failed to start ~ts gRPC server on ~p, reason: ~p",
                   [GwName, ListenOn, Reason])
     end.
 

apps/emqx_gateway/src/exproto/protos/exproto.proto

@@ -18,8 +18,8 @@ syntax = "proto3";
 
 package emqx.exproto.v1;
 
-// The Broker side serivce. It provides a set of APIs to
-// handle a protcol access
+// The Broker side service. It provides a set of APIs to
+// handle a protocol access
 service ConnectionAdapter {
 
   // -- socket layer

apps/emqx_gateway/src/lwm2m/emqx_lwm2m_channel.erl

@@ -51,12 +51,12 @@
           clientinfo   :: emqx_types:clientinfo(),
           %% Session
           session      :: emqx_lwm2m_session:session() | undefined,
-          %% Channl State
+          %% Channel State
           %% TODO: is there need
           conn_state   :: conn_state(),
           %% Timer
           timers       :: #{atom() => disable | undefined | reference()},
-          %% FIXME: don't store anonymouse func
+          %% FIXME: don't store anonymous func
           with_context :: function()
          }).
 
@@ -215,7 +215,7 @@ handle_call({subscribe, Topic, SubOpts}, _From,
 
     _ = run_hooks(Ctx, 'session.subscribed',
                   [ClientInfo, MountedTopic, NSubOpts]),
-    %% modifty session state
+    %% modify session state
     Subs = emqx_lwm2m_session:info(subscriptions, Session),
     NSubs = maps:put(MountedTopic, NSubOpts, Subs),
     NSession = emqx_lwm2m_session:set_subscriptions(NSubs, Session),
@@ -231,7 +231,7 @@ handle_call({unsubscribe, Topic}, _From,
     ok = emqx_broker:unsubscribe(MountedTopic),
     _ = run_hooks(Ctx, 'session.unsubscribe',
                   [ClientInfo, MountedTopic, #{}]),
-    %% modifty session state
+    %% modify session state
     Subs = emqx_lwm2m_session:info(subscriptions, Session),
     NSubs = maps:remove(MountedTopic, Subs),
     NSession = emqx_lwm2m_session:set_subscriptions(NSubs, Session),

apps/emqx_gateway/src/lwm2m/emqx_lwm2m_tlv.erl

@@ -150,7 +150,7 @@ encode_value(Value) when is_integer(Value) ->
 encode_value(Value) when is_float(Value) ->
     <<Value:32/float>>;
 encode_value(Value) ->
-    error(io_lib:format("unsupport format ~p", [Value])).
+    error(io_lib:format("unsupported format ~p", [Value])).
 
 
 

apps/emqx_gateway/src/mqttsn/README.md

@@ -25,7 +25,7 @@ mqtt.sn.advertise_duration = 900
 ## Value: Number
 mqtt.sn.gateway_id = 1
 
-## To control whether write statistics data into ETS table for dashbord to read.
+## To control whether write statistics data into ETS table for dashboard to read.
 ##
 ## Value: on | off
 mqtt.sn.enable_stats = off
@@ -61,7 +61,7 @@ mqtt.sn.password = abc
 - mqtt.sn.gateway_id
   * Gateway id in ADVERTISE message.
 - mqtt.sn.enable_stats
-  * To control whether write statistics data into ETS table for dashbord to read.
+  * To control whether write statistics data into ETS table for dashboard to read.
 - mqtt.sn.enable_qos3
   * To control whether accept and process the received publish message with qos=-1.
 - mqtt.sn.predefined.topic.N

apps/emqx_gateway/src/mqttsn/emqx_sn_channel.erl

@@ -261,7 +261,7 @@ maybe_assign_clientid(_Packet, ClientInfo) ->
 
 fix_mountpoint(_Packet, #{mountpoint := undefined}) -> ok;
 fix_mountpoint(_Packet, ClientInfo = #{mountpoint := Mountpoint}) ->
-    %% TODO: Enrich the varibale replacement????
+    %% TODO: Enrich the variable replacement????
     %%       i.e: ${ClientInfo.auth_result.productKey}
     Mountpoint1 = emqx_mountpoint:replvar(Mountpoint, ClientInfo),
     {ok, ClientInfo#{mountpoint := Mountpoint1}}.
@@ -357,7 +357,7 @@ handle_in(?SN_SEARCHGW_MSG(_Radius),
     {ok, {outgoing, ?SN_GWINFO_MSG(GwId, <<>>)}, Channel};
 
 handle_in(?SN_ADVERTISE_MSG(_GwId, _Radius), Channel) ->
-    % ingore
+    % ignore
     shutdown(normal, Channel);
 
 handle_in(?SN_PUBLISH_MSG(#mqtt_sn_flags{qos = ?QOS_NEG1,

apps/emqx_gateway/src/mqttsn/emqx_sn_impl.erl

@@ -89,7 +89,7 @@ on_gateway_load(_Gateway = #{ name := GwName,
             {ok, ListenerPids, _GwState = #{ctx => Ctx}};
         {error, {Reason, Listener}} ->
             throw({badconf, #{ key => listeners
-                             , vallue => Listener
+                             , value => Listener
                              , reason => Reason
                              }})
     end.

apps/emqx_gateway/src/mqttsn/include/emqx_sn.hrl

@@ -53,7 +53,7 @@
 -define(SN_RC_CONGESTION,       16#01).
 -define(SN_RC_INVALID_TOPIC_ID, 16#02).
 -define(SN_RC_NOT_SUPPORTED,    16#03).
-%% Custome Reason code by emqx
+%% Custom Reason code by emqx
 -define(SN_RC_NOT_AUTHORIZE,    16#04).
 -define(SN_RC_FAILED_SESSION,   16#05).
 -define(SN_EXCEED_LIMITATION,   16#06).

apps/emqx_gateway/src/stomp/emqx_stomp_channel.erl

@@ -263,7 +263,7 @@ parse_heartbeat(#stomp_frame{headers = Headers}, ClientInfo) ->
 
 fix_mountpoint(_Packet, #{mountpoint := undefined}) -> ok;
 fix_mountpoint(_Packet, ClientInfo = #{mountpoint := Mountpoint}) ->
-    %% TODO: Enrich the varibale replacement????
+    %% TODO: Enrich the variable replacement????
     %%       i.e: ${ClientInfo.auth_result.productKey}
     Mountpoint1 = emqx_mountpoint:replvar(Mountpoint, ClientInfo),
     {ok, ClientInfo#{mountpoint := Mountpoint1}}.
@@ -492,7 +492,7 @@ handle_in(?PACKET(?CMD_COMMIT, Headers), Channel) ->
                 maybe_outgoing_receipt(receipt_id(Headers), Outgoings, Chann1);
             {error, Reason, Chann1} ->
                 %% FIXME: atomic for transaction ??
-                ErrMsg = io_lib:format("Execute transaction ~ts falied: ~0p",
+                ErrMsg = io_lib:format("Execute transaction ~ts failed: ~0p",
                                        [TxId, Reason]
                                       ),
                 handle_out(error, {receipt_id(Headers), ErrMsg}, Chann1)

apps/emqx_gateway/test/emqx_gateway_cli_SUITE.erl

@@ -108,7 +108,7 @@ t_gateway_registry_list(_) ->
 t_gateway_usage(_) ->
     ?assertEqual(
        ["gateway list                     # List all gateway\n",
-        "gateway lookup <Name>            # Lookup a gateway detailed informations\n",
+        "gateway lookup <Name>            # Lookup a gateway detailed information\n",
         "gateway load   <Name> <JsonConf> # Load a gateway with config\n",
         "gateway unload <Name>            # Unload the gateway\n",
         "gateway stop   <Name>            # Stop the gateway\n",
@@ -181,13 +181,13 @@ t_gateway_start_stop(_) ->
 
     emqx_gateway_cli:gateway(["stop", "mqttsn"]),
     ?assertEqual("ok\n", acc_print()),
-    %% dupliacted stop gateway, return ok
+    %% duplicated stop gateway, return ok
     emqx_gateway_cli:gateway(["stop", "mqttsn"]),
     ?assertEqual("ok\n", acc_print()),
 
     emqx_gateway_cli:gateway(["start", "mqttsn"]),
     ?assertEqual("ok\n", acc_print()),
-    %% dupliacted start gateway, return ok
+    %% duplicated start gateway, return ok
     emqx_gateway_cli:gateway(["start", "mqttsn"]),
     ?assertEqual("ok\n", acc_print()),
 

apps/emqx_gateway/test/emqx_gateway_cm_SUITE.erl

@@ -160,7 +160,7 @@ t_handle_process_down(Conf) ->
 
     _ = Pid ! {'DOWN', mref, process, self(), normal},
 
-    timer:sleep(200), %% wait the asycn clear task
+    timer:sleep(200), %% wait the async clear task
     ?assertEqual(
        [],
        ets:tab2list(emqx_gateway_cm:tabname(chan, ?GWNAME))),

apps/emqx_gateway/test/emqx_lwm2m_SUITE.erl

@@ -1986,7 +1986,7 @@ verify_read_response_1(CmdId, UdpSock) ->
     Request = test_recv_coap_request(UdpSock),
     ?LOGT("LwM2M client got ~p", [Request]),
 
-    %% device replies the commond
+    %% device replies the command
     test_send_coap_response(
       UdpSock,
       "127.0.0.1",

apps/emqx_gateway/test/emqx_sn_protocol_SUITE.erl

@@ -233,7 +233,7 @@ t_subscribe_case03(_) ->
     ?assertEqual(<<2, ?SN_DISCONNECT>>, receive_response(Socket)),
     gen_udp:close(Socket).
 
-%% In this case We use predefined topic name to register and subcribe,
+%% In this case We use predefined topic name to register and subscribe,
 %% and expect to receive the corresponding predefined topic id but not a new
 %% generated topic id from broker. We design this case to illustrate
 %% emqx_sn_gateway's compatibility of dealing with predefined and normal

apps/emqx_gateway/test/emqx_stomp_SUITE.erl

@@ -451,7 +451,7 @@ t_rest_clienit_info(_) ->
 %% TODO: Mountpoint, AuthChain, Authorization + Mountpoint, ClientInfoOverride,
 %%       Listeners, Metrics, Stats, ClientInfo
 %%
-%% TODO: Start/Stop, List Instace
+%% TODO: Start/Stop, List Instance
 %%
 %% TODO: RateLimit, OOM,
 

apps/emqx_machine/src/emqx_global_gc.erl

@@ -79,7 +79,7 @@ code_change(_OldVsn, State, _Extra) ->
     {ok, State}.
 
 %%--------------------------------------------------------------------
-%% Internel function
+%% Internal function
 %%--------------------------------------------------------------------
 
 ensure_timer(State) ->

apps/emqx_modules/src/emqx_modules_conf.erl

@@ -14,7 +14,7 @@
 %% limitations under the License.
 %%--------------------------------------------------------------------
 
-%% @doc The emqx-modules configration interoperable interfaces
+%% @doc The emqx-modules configuration interoperable interfaces
 -module(emqx_modules_conf).
 
 -behaviour(emqx_config_handler).

apps/emqx_modules/src/emqx_topic_metrics_api.erl

@@ -111,7 +111,7 @@ schema("/mqtt/topic_metrics/:topic") ->
 fields(reset) ->
     [ {topic
       , mk( binary()
-          , #{ desc => <<"Topic Name. If this paramter is not present, all created topic metrics will be reseted">>
+          , #{ desc => <<"Topic Name. If this parameter is not present, all created topic metrics will be reset">>
              , example => <<"testtopic/1">>
              , nullable => true})}
     , {action
@@ -135,7 +135,7 @@ fields(topic_metrics) ->
              , example => <<"2022-01-14T21:48:47+08:00">>})},
       { reset_time
       , mk( emqx_schema:rfc3339_system_time()
-          , #{ desc => <<"Topic Metrics reset date time, in rfc3339. Nullable if never reseted">>
+          , #{ desc => <<"Topic Metrics reset date time, in rfc3339. Nullable if never reset">>
              , nullable => true
              , example => <<"2022-01-14T21:48:47+08:00">>})},
       { metrics

apps/emqx_plugins/src/emqx_plugins.erl

@@ -418,7 +418,7 @@ load_plugin_app(AppName, AppVsn, Ebin, RunningApps) ->
         {_, Vsn} ->
             case bin(Vsn) =:= bin(AppVsn) of
                 true ->
-                    %% already started on the exact versio
+                    %% already started on the exact version
                     ok;
                 false ->
                     %% running but a different version

apps/emqx_plugins/src/emqx_plugins_cli.erl

@@ -40,7 +40,7 @@ describe(NameVsn, LogFun) ->
         {ok, Plugin} ->
             LogFun("~ts~n", [to_json(Plugin)]);
         {error, Reason} ->
-            %% this should not happend unless the package is manually installed
+            %% this should not happen unless the package is manually installed
             %% corrupted packages installed from emqx_plugins:ensure_installed
             %% should not leave behind corrupted files
             ?SLOG(error, #{msg => "failed_to_describe_plugin",

apps/emqx_plugins/test/emqx_plugins_SUITE.erl

@@ -118,7 +118,7 @@ t_demo_install_start_stop_uninstall(Config) ->
     ?assertEqual([], emqx_plugins:list()),
     ok.
 
-%% help funtion to create a info file.
+%% help function to create a info file.
 %% The file is in JSON format when built
 %% but since we are using hocon:load to load it
 %% ad-hoc test files can be in hocon format

apps/emqx_plugins/test/emqx_plugins_tests.erl

@@ -96,7 +96,7 @@ purge_test() ->
             ?assertEqual(ok, emqx_plugins:purge("a-1")),
             %% assert the dir is gone
             ?assertMatch({error, enoent}, file:read_file_info(Dir)),
-            %% wite a file for the dir path
+            %% write a file for the dir path
             ok = file:write_file(Dir, "a"),
             ?assertEqual(ok, emqx_plugins:purge("a-1"))
         end).

apps/emqx_psk/src/emqx_psk.erl

@@ -120,7 +120,7 @@ handle_call({import, SrcFile}, _From, State) ->
 
 handle_call(Req, _From, State) ->
     ?SLOG(info, #{msg => "unexpected_call_discarded", req => Req}),
-    {reply, {error, unexecpted}, State}.
+    {reply, {error, unexpected}, State}.
 
 handle_cast(Req, State) ->
     ?SLOG(info, #{msg => "unexpected_cast_discarded", req => Req}),

apps/emqx_resource/src/emqx_resource.erl

@@ -60,7 +60,7 @@
 -export([ restart/1  %% restart the instance.
         , restart/2
         , health_check/1 %% verify if the resource is working normally
-        , set_resource_status_stoped/1 %% set resource status to stoped
+        , set_resource_status_stoped/1 %% set resource status to stopped
         , stop/1   %% stop the instance
         , query/2  %% query the instance
         , query/3  %% query the instance with after_query()

apps/emqx_resource/src/emqx_resource_health_check.erl

@@ -82,7 +82,7 @@ health_check_timeout_checker(Pid, Name, SleepTime, Timeout) ->
         health_check_finish -> timer:sleep(SleepTime)
     after Timeout ->
         emqx_alarm:activate(Name, #{name => Name},
-                        <<Name/binary, " health check timout">>),
+                        <<Name/binary, " health check timeout">>),
         emqx_resource:set_resource_status_stoped(Name),
         receive
             health_check_finish -> timer:sleep(SleepTime)

apps/emqx_retainer/README.md

@@ -42,7 +42,7 @@ retainer.max_payload_size = 64KB
 ##  - 30m: 30 minutes
 ##  - 20s: 20 seconds
 ##
-## Defaut: 0
+## Default: 0
 retainer.expiry_interval = 0
 ```
 

apps/emqx_retainer/src/emqx_retainer_api.erl

@@ -92,7 +92,7 @@ with_topic_api() ->
             description => <<"delete matching messages">>,
             parameters => parameters(),
             responses => #{
-                <<"204">> => schema(<<"Successed">>),
+                <<"204">> => schema(<<"Succeeded">>),
                 <<"405">> => schema(<<"NotAllowed">>)
             }
         }

apps/emqx_rule_engine/src/emqx_rule_api_schema.erl

@@ -100,7 +100,7 @@ fields("metrics") ->
         })}
     , {"outputs.total", sc(integer(), #{
             desc => "How much times the outputs are called by the rule. "
-                    "This value may serveral times of 'sql.matched', depending on the "
+                    "This value may several times of 'sql.matched', depending on the "
                     "number of the outputs of the rule."
         })}
     , {"outputs.success", sc(integer(), #{

apps/emqx_rule_engine/src/emqx_rule_engine_schema.erl

@@ -87,7 +87,7 @@ fields("builtin_output_republish") ->
 The arguments of the built-in 'republish' output.<br>
 We can use variables in the args.<br>
 
-The variables are selected by the rule. For exmaple, if the rule SQL is defined as following:
+The variables are selected by the rule. For example, if the rule SQL is defined as following:
 <code>
     SELECT clientid, qos, payload FROM \"t/1\"
 </code>

apps/emqx_rule_engine/src/emqx_rule_funcs.erl

@@ -89,7 +89,7 @@
         , subbits/6
         ]).
 
-%% Data Type Convertion
+%% Data Type Conversion
 -export([ str/1
         , str_utf8/1
         , bool/1
@@ -150,7 +150,7 @@
         , map_put/3
         ]).
 
-%% For backword compatibility
+%% For backward compatibility
 -export([ mget/2
         , mget/3
         , mput/3
@@ -503,7 +503,7 @@ do_get_subbits(Bits, Sz, Len, <<"bits">>, <<"signed">>, <<"little">>) ->
                       <<SubBits:Sz/bits-signed-little-unit:1>>).
 
 %%------------------------------------------------------------------------------
-%% Data Type Convertion Funcs
+%% Data Type Conversion Funcs
 %%------------------------------------------------------------------------------
 
 str(Data) ->

apps/emqx_rule_engine/test/emqx_rule_funcs_SUITE.erl

@@ -81,7 +81,7 @@ t_payload(_) ->
     ?assertEqual(c, apply_func(payload, [<<"a.b.c">>], Input#{payload => NestedMap})).
 
 %%------------------------------------------------------------------------------
-%% Data Type Convertion Funcs
+%% Data Type Conversion Funcs
 %%------------------------------------------------------------------------------
 t_str(_) ->
     ?assertEqual(<<"abc">>, emqx_rule_funcs:str("abc")),

apps/emqx_slow_subs/src/emqx_slow_subs.erl

@@ -111,7 +111,7 @@ on_stats_update(#{clientid := ClientId,
         [_] ->
             %% if Latency > minimum value, we should update it
             %% if Latency < minimum value, maybe it can replace the minimum value
-            %% so alwyas update at here
+            %% so always update at here
             %% do we need check if Latency == minimum ???
             ets:insert(?TOPK_TAB,
                        #top_k{index = Index, type = Type, last_update_time = Ts}),

bin/emqx

@@ -258,7 +258,7 @@ check_user() {
         for ARG in "$@"; do
             CMD="${CMD} \"$ARG\""
         done
-        # This will drop priviledges into the runner user
+        # This will drop privileges into the runner user
         # It exec's in a new shell and the current shell will exit
         exec su - "$RUNNER_USER" -c "$CMD"
     fi
@@ -367,7 +367,7 @@ relx_start_command() {
 generate_config() {
     local name_type="$1"
     local node_name="$2"
-    ## Delete the *.siz files first or it cann't start after
+    ## Delete the *.siz files first or it can't start after
     ## changing the config 'log.rotation.size'
     rm -rf "${RUNNER_LOG_DIR}"/*.siz
 
@@ -380,7 +380,7 @@ generate_config() {
     local NOW_TIME
     NOW_TIME="$(call_hocon now_time)"
 
-    ## ths command populates two files: app.<time>.config and vm.<time>.args
+    ## this command populates two files: app.<time>.config and vm.<time>.args
     ## NOTE: the generate command merges environment variables to the base config (emqx.conf),
     ## but does not include the cluster-override.conf and local-override.conf
     ## meaning, certain overrides will not be mapped to app.<time>.config file
@@ -413,7 +413,7 @@ generate_config() {
         ARG_VALUE=$(echo "$ARG_LINE" | awk '{print $NF}')
         ## use the key to look up in vm.args file for the value
         TMP_ARG_VALUE=$(grep "^$ARG_KEY" "$TMP_ARG_FILE" || true | awk '{print $NF}')
-        ## compare generated (to override) value to original (to be overriden) value
+        ## compare generated (to override) value to original (to be overridden) value
         if [ "$ARG_VALUE" != "$TMP_ARG_VALUE" ] ; then
             ## if they are different
             if [ -n "$TMP_ARG_VALUE" ]; then
@@ -499,7 +499,7 @@ latest_vm_args() {
     if [ -f "$vm_args_file" ]; then
         echo "$vm_args_file"
     else
-        echoerr "ERRRO: node not initialized?"
+        echoerr "ERROR: node not initialized?"
         echoerr "Generated config file vm.*.args is not found for command '$COMMAND'"
         echoerr "in config dir: $CONFIGS_DIR"
         echoerr "In case the file has been deleted while the node is running,"

bin/nodetool

@@ -68,7 +68,7 @@ do(Args) ->
         ["getpid"] ->
             io:format("~p\n", [list_to_integer(rpc:call(TargetNode, os, getpid, []))]);
         ["ping"] ->
-            %% If we got this far, the node already responsed to a ping, so just dump
+            %% If we got this far, the node already responded to a ping, so just dump
             %% a "pong"
             io:format("pong\n");
         ["stop"] ->

deploy/docker/README.md

@@ -188,11 +188,11 @@ docker run -d --name emqx -p 18083:18083 -p 1883:1883 -p 4369:4369 \
     -e EMQX_BACKEND_REDIS_POOL1__SERVER=127.0.0.1:6379
     [...]
     -e EMQX_BACKEND__REDIS__POOL5__SERVER=127.0.0.5:6379
-    -e EMQX_BACKEND__REDIS__HOOK_MESSAGE__PUBLISH__1='{"topic": "persistant/topic1", "action": {"function": "on_message_publish"}, "pool": "pool1"}'
-    -e EMQX_BACKEND__REDIS__HOOK_MESSAGE__PUBLISH__2='{"topic": "persistant/topic2", "action": {"function": "on_message_publish"}, "pool": "pool1"}'
-    -e EMQX_BACKEND__REDIS__HOOK_MESSAGE__PUBLISH__3='{"topic": "persistant/topic3", "action": {"function": "on_message_publish"}, "pool": "pool1"}'
+    -e EMQX_BACKEND__REDIS__HOOK_MESSAGE__PUBLISH__1='{"topic": "persistent/topic1", "action": {"function": "on_message_publish"}, "pool": "pool1"}'
+    -e EMQX_BACKEND__REDIS__HOOK_MESSAGE__PUBLISH__2='{"topic": "persistent/topic2", "action": {"function": "on_message_publish"}, "pool": "pool1"}'
+    -e EMQX_BACKEND__REDIS__HOOK_MESSAGE__PUBLISH__3='{"topic": "persistent/topic3", "action": {"function": "on_message_publish"}, "pool": "pool1"}'
     [...]
-    -e EMQX_BACKEND__REDIS__HOOK_MESSAGE__PUBLISH__13='{"topic": "persistant/topic13", "action": {"function": "on_message_publish"}, "pool": "pool1"}'
+    -e EMQX_BACKEND__REDIS__HOOK_MESSAGE__PUBLISH__13='{"topic": "persistent/topic13", "action": {"function": "on_message_publish"}, "pool": "pool1"}'
     emqx/emqx:latest
 ```
 

deploy/packages/rpm/Makefile

@@ -5,7 +5,7 @@ BUILT := $(SRCDIR)/BUILT
 dash := -
 none :=
 space := $(none) $(none)
-## RPM does not allow '-' in version nubmer and release string, replace with '_'
+## RPM does not allow '-' in version number and release string, replace with '_'
 RPM_VSN := $(subst -,_,$(PKG_VSN))
 RPM_REL := otp$(subst -,_,$(OTP_VSN))
 

rebar.config.erl

@@ -99,7 +99,7 @@ test_deps() ->
     ].
 
 common_compile_opts(Vsn) ->
-    [ debug_info % alwyas include debug_info
+    [ debug_info % always include debug_info
     , {compile_info, [{emqx_vsn, Vsn}]}
     ] ++
     [{d, 'EMQX_BENCHMARK'} || os:getenv("EMQX_BENCHMARK") =:= "1" ].

scripts/apps-version-check.sh

@@ -36,7 +36,7 @@ check_apps() {
             exit 1
         fi
         if [ -z "${old_app_version:-}" ]; then
-            echo "skiped checking new app ${app}"
+            echo "skipped checking new app ${app}"
         elif [ "$old_app_version" = "$now_app_version" ]; then
             lines="$(git diff --name-only "$latest_release"...HEAD \
                         -- "$app_path/src" \
@@ -61,7 +61,7 @@ _main() {
     if echo "${latest_release}" |grep -oE '[0-9]+.[0-9]+.[0-9]+' > /dev/null 2>&1; then
         check_apps
     else
-        echo "skiped unstable tag: ${latest_release}"
+        echo "skipped unstable tag: ${latest_release}"
     fi
 }
 

scripts/start-two-nodes-in-docker.sh

@@ -2,7 +2,7 @@
 
 set -euo pipefail
 
-## This script takes the first argument as docker iamge name,
+## This script takes the first argument as docker image name,
 ## starts two containers running with the built code mount
 ## into docker containers.
 ##

scripts/update-copyright-years.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-## run this script onece a year
+## run this script once a year
 
 set -euo pipefail
 

scripts/update_appup.escript

@@ -26,7 +26,7 @@ Usage:
 Options:
 
   --check           Don't update the appfile, just check that they are complete
-  --repo            Upsteam git repo URL
+  --repo            Upstream git repo URL
   --remote          Get upstream repo URL from the specified git remote
   --skip-build      Don't rebuild the releases. May produce wrong results
   --make-command    A command used to assemble the release