diff --git a/apps/emqx/src/emqx_schema.erl b/apps/emqx/src/emqx_schema.erl
index 574305a4f..a76346bad 100644
--- a/apps/emqx/src/emqx_schema.erl
+++ b/apps/emqx/src/emqx_schema.erl
@@ -1902,6 +1902,7 @@ common_ssl_opts_schema(Defaults) ->
                     sensitive => true,
                     required => false,
                     example => <<"">>,
+                    format => <<"password">>,
                     desc => ?DESC(common_ssl_opts_schema_password)
                 }
             )},
diff --git a/apps/emqx_connector/src/emqx_connector_schema_lib.erl b/apps/emqx_connector/src/emqx_connector_schema_lib.erl
index dd85566ed..53643c9f9 100644
--- a/apps/emqx_connector/src/emqx_connector_schema_lib.erl
+++ b/apps/emqx_connector/src/emqx_connector_schema_lib.erl
@@ -68,6 +68,8 @@ ssl_fields() ->
 relational_db_fields() ->
     [
         {database, fun database/1},
+        %% TODO: The `pool_size` for drivers will be deprecated. Ues `worker_pool_size` for emqx_resource
+        %% See emqx_resource.hrl
         {pool_size, fun pool_size/1},
         {username, fun username/1},
         {password, fun password/1},
@@ -102,6 +104,7 @@ username(_) -> undefined.
 password(type) -> binary();
 password(desc) -> ?DESC("password");
 password(required) -> false;
+password(format) -> <<"password">>;
 password(_) -> undefined.
 
 auto_reconnect(type) -> boolean();
diff --git a/apps/emqx_connector/src/mqtt/emqx_connector_mqtt_schema.erl b/apps/emqx_connector/src/mqtt/emqx_connector_mqtt_schema.erl
index 8b6994dd4..4d35583a3 100644
--- a/apps/emqx_connector/src/mqtt/emqx_connector_mqtt_schema.erl
+++ b/apps/emqx_connector/src/mqtt/emqx_connector_mqtt_schema.erl
@@ -96,6 +96,7 @@ fields("connector") ->
                 binary(),
                 #{
                     default => "emqx",
+                    format => <<"password">>,
                     desc => ?DESC("password")
                 }
             )},
diff --git a/apps/emqx_resource/i18n/emqx_resource_schema_i18n.conf b/apps/emqx_resource/i18n/emqx_resource_schema_i18n.conf
index ce4c7e3b0..0d53b813e 100644
--- a/apps/emqx_resource/i18n/emqx_resource_schema_i18n.conf
+++ b/apps/emqx_resource/i18n/emqx_resource_schema_i18n.conf
@@ -22,6 +22,17 @@ emqx_resource_schema {
     }
   }
 
+  worker_pool_size {
+    desc {
+      en: """Resource worker pool size."""
+      zh: """资源连接池大小。"""
+    }
+    label {
+      en: """Worker Pool Size"""
+      zh: """资源连接池大小"""
+    }
+  }
+
   health_check_interval {
     desc {
       en: """Health check interval, in milliseconds."""
@@ -134,8 +145,8 @@ emqx_resource_schema {
 
   queue_max_bytes {
     desc {
-      en: """Maximum queue storage size in bytes."""
-      zh: """消息队列的最大长度，以字节计。"""
+      en: """Maximum queue storage."""
+      zh: """消息队列的最大长度。"""
     }
     label {
       en: """Queue max bytes"""
diff --git a/apps/emqx_resource/include/emqx_resource.hrl b/apps/emqx_resource/include/emqx_resource.hrl
index 04b3f16ea..3f2cac46b 100644
--- a/apps/emqx_resource/include/emqx_resource.hrl
+++ b/apps/emqx_resource/include/emqx_resource.hrl
@@ -49,25 +49,27 @@
     %% use auto_restart_interval instead
     auto_retry_interval => integer(),
     %%======================================= Deprecated Opts End
+    worker_pool_size => pos_integer(),
+    %% use `integer()` compatibility to release 5.0.0 bpapi
     health_check_interval => integer(),
     %% We can choose to block the return of emqx_resource:start until
     %% the resource connected, wait max to `start_timeout` ms.
-    start_timeout => integer(),
+    start_timeout => pos_integer(),
     %% If `start_after_created` is set to true, the resource is started right
     %% after it is created. But note that a `started` resource is not guaranteed
     %% to be `connected`.
     start_after_created => boolean(),
     %% If the resource disconnected, we can set to retry starting the resource
     %% periodically.
-    auto_restart_interval => integer(),
+    auto_restart_interval => pos_integer(),
     enable_batch => boolean(),
-    batch_size => integer(),
-    batch_time => integer(),
+    batch_size => pos_integer(),
+    batch_time => pos_integer(),
     enable_queue => boolean(),
-    queue_max_bytes => integer(),
+    queue_max_bytes => pos_integer(),
     query_mode => async | sync | dynamic,
-    resume_interval => integer(),
-    async_inflight_window => integer()
+    resume_interval => pos_integer(),
+    async_inflight_window => pos_integer()
 }.
 -type query_result() ::
     ok
@@ -75,6 +77,8 @@
     | {error, term()}
     | {resource_down, term()}.
 
+-define(WORKER_POOL_SIZE, 16).
+
 -define(DEFAULT_QUEUE_SIZE, 1024 * 1024 * 1024).
 -define(DEFAULT_QUEUE_SIZE_RAW, <<"1GB">>).
 
@@ -92,12 +96,6 @@
 -define(HEALTHCHECK_INTERVAL, 15000).
 -define(HEALTHCHECK_INTERVAL_RAW, <<"15s">>).
 
--define(START_AFTER_CREATED, true).
-
-%% milliseconds
--define(START_TIMEOUT, 5000).
--define(START_TIMEOUT_RAW, <<"5s">>).
-
 %% milliseconds
 -define(AUTO_RESTART_INTERVAL, 60000).
 -define(AUTO_RESTART_INTERVAL_RAW, <<"60s">>).
diff --git a/apps/emqx_resource/src/emqx_resource_manager.erl b/apps/emqx_resource/src/emqx_resource_manager.erl
index 07abd4007..2f6964380 100644
--- a/apps/emqx_resource/src/emqx_resource_manager.erl
+++ b/apps/emqx_resource/src/emqx_resource_manager.erl
@@ -114,6 +114,11 @@ create_and_return_data(MgrId, ResId, Group, ResourceType, Config, Opts) ->
     {ok, _Group, Data} = lookup(ResId),
     {ok, Data}.
 
+%% internal configs
+-define(START_AFTER_CREATED, true).
+%% in milliseconds
+-define(START_TIMEOUT, 5000).
+
 %% @doc Create a resource_manager and wait until it is running
 create(MgrId, ResId, Group, ResourceType, Config, Opts) ->
     % The state machine will make the actual call to the callback/resource module after init
@@ -379,9 +384,17 @@ handle_event(EventType, EventData, State, Data) ->
 %%------------------------------------------------------------------------------
 insert_cache(ResId, Group, Data = #data{manager_id = MgrId}) ->
     case get_owner(ResId) of
-        not_found -> ets:insert(?ETS_TABLE, {ResId, Group, Data});
-        MgrId -> ets:insert(?ETS_TABLE, {ResId, Group, Data});
-        _ -> self() ! quit
+        not_found ->
+            ets:insert(?ETS_TABLE, {ResId, Group, Data});
+        MgrId ->
+            ets:insert(?ETS_TABLE, {ResId, Group, Data});
+        _ ->
+            ?SLOG(error, #{
+                msg => get_resource_owner_failed,
+                resource_id => ResId,
+                action => quit_resource
+            }),
+            self() ! quit
     end.
 
 read_cache(ResId) ->
@@ -420,12 +433,14 @@ get_owner(ResId) ->
     end.
 
 handle_disconnected_state_enter(Data) ->
+    {next_state, disconnected, Data, retry_actions(Data)}.
+
+retry_actions(Data) ->
     case maps:get(auto_restart_interval, Data#data.opts, ?AUTO_RESTART_INTERVAL) of
         undefined ->
-            {next_state, disconnected, Data};
+            [];
         RetryInterval ->
-            Actions = [{state_timeout, RetryInterval, auto_retry}],
-            {next_state, disconnected, Data, Actions}
+            [{state_timeout, RetryInterval, auto_retry}]
     end.
 
 handle_remove_event(From, ClearMetrics, Data) ->
@@ -456,7 +471,7 @@ start_resource(Data, From) ->
             %% Keep track of the error reason why the connection did not work
             %% so that the Reason can be returned when the verification call is made.
             UpdatedData = Data#data{error = Reason},
-            Actions = maybe_reply([], From, Err),
+            Actions = maybe_reply(retry_actions(UpdatedData), From, Err),
             {next_state, disconnected, UpdatedData, Actions}
     end.
 
diff --git a/apps/emqx_resource/src/emqx_resource_worker_sup.erl b/apps/emqx_resource/src/emqx_resource_worker_sup.erl
index a2b3a1ba5..5305eddaf 100644
--- a/apps/emqx_resource/src/emqx_resource_worker_sup.erl
+++ b/apps/emqx_resource/src/emqx_resource_worker_sup.erl
@@ -53,23 +53,23 @@ init([]) ->
     {ok, {SupFlags, ChildSpecs}}.
 
 start_workers(ResId, Opts) ->
-    PoolSize = pool_size(Opts),
-    _ = ensure_worker_pool(ResId, hash, [{size, PoolSize}]),
+    WorkerPoolSize = worker_pool_size(Opts),
+    _ = ensure_worker_pool(ResId, hash, [{size, WorkerPoolSize}]),
     lists:foreach(
         fun(Idx) ->
             _ = ensure_worker_added(ResId, Idx),
             ok = ensure_worker_started(ResId, Idx, Opts)
         end,
-        lists:seq(1, PoolSize)
+        lists:seq(1, WorkerPoolSize)
     ).
 
 stop_workers(ResId, Opts) ->
-    PoolSize = pool_size(Opts),
+    WorkerPoolSize = worker_pool_size(Opts),
     lists:foreach(
         fun(Idx) ->
             ensure_worker_removed(ResId, Idx)
         end,
-        lists:seq(1, PoolSize)
+        lists:seq(1, WorkerPoolSize)
     ),
     ensure_worker_pool_removed(ResId),
     ok.
@@ -77,7 +77,7 @@ stop_workers(ResId, Opts) ->
 %%%=============================================================================
 %%% Internal
 %%%=============================================================================
-pool_size(Opts) ->
+worker_pool_size(Opts) ->
     maps:get(worker_pool_size, Opts, erlang:system_info(schedulers_online)).
 
 ensure_worker_pool(ResId, Type, Opts) ->
diff --git a/apps/emqx_resource/src/schema/emqx_resource_schema.erl b/apps/emqx_resource/src/schema/emqx_resource_schema.erl
index 2272234f2..fe8564a41 100644
--- a/apps/emqx_resource/src/schema/emqx_resource_schema.erl
+++ b/apps/emqx_resource/src/schema/emqx_resource_schema.erl
@@ -44,9 +44,8 @@ fields("resource_opts") ->
     ];
 fields("creation_opts") ->
     [
+        {worker_pool_size, fun worker_pool_size/1},
         {health_check_interval, fun health_check_interval/1},
-        {start_after_created, fun start_after_created/1},
-        {start_timeout, fun start_timeout/1},
         {auto_restart_interval, fun auto_restart_interval/1},
         {query_mode, fun query_mode/1},
         {async_inflight_window, fun async_inflight_window/1},
@@ -57,24 +56,18 @@ fields("creation_opts") ->
         {max_queue_bytes, fun queue_max_bytes/1}
     ].
 
+worker_pool_size(type) -> pos_integer();
+worker_pool_size(desc) -> ?DESC("worker_pool_size");
+worker_pool_size(default) -> ?WORKER_POOL_SIZE;
+worker_pool_size(required) -> false;
+worker_pool_size(_) -> undefined.
+
 health_check_interval(type) -> emqx_schema:duration_ms();
 health_check_interval(desc) -> ?DESC("health_check_interval");
 health_check_interval(default) -> ?HEALTHCHECK_INTERVAL_RAW;
 health_check_interval(required) -> false;
 health_check_interval(_) -> undefined.
 
-start_after_created(type) -> boolean();
-start_after_created(required) -> false;
-start_after_created(default) -> ?START_AFTER_CREATED;
-start_after_created(desc) -> ?DESC("start_after_created");
-start_after_created(_) -> undefined.
-
-start_timeout(type) -> emqx_schema:duration_ms();
-start_timeout(desc) -> ?DESC("start_timeout");
-start_timeout(default) -> ?START_TIMEOUT_RAW;
-start_timeout(required) -> false;
-start_timeout(_) -> undefined.
-
 auto_restart_interval(type) -> hoconsc:union([infinity, emqx_schema:duration_ms()]);
 auto_restart_interval(desc) -> ?DESC("auto_restart_interval");
 auto_restart_interval(default) -> ?AUTO_RESTART_INTERVAL_RAW;
diff --git a/lib-ee/emqx_ee_connector/i18n/emqx_ee_connector_influxdb.conf b/lib-ee/emqx_ee_connector/i18n/emqx_ee_connector_influxdb.conf
index 4d2dc168c..ff2266de5 100644
--- a/lib-ee/emqx_ee_connector/i18n/emqx_ee_connector_influxdb.conf
+++ b/lib-ee/emqx_ee_connector/i18n/emqx_ee_connector_influxdb.conf
@@ -150,15 +150,5 @@ emqx_ee_connector_influxdb {
                 zh: """时间精度"""
             }
     }
-    pool_size {
-        desc {
-                en: """InfluxDB Pool Size. Default value is CPU threads."""
-                zh: """InfluxDB 连接池大小，默认为 CPU 线程数。"""
-            }
-        label {
-                en: """InfluxDB Pool Size"""
-                zh: """InfluxDB 连接池大小"""
-            }
-    }
 
 }
diff --git a/lib-ee/emqx_ee_connector/src/emqx_ee_connector_influxdb.erl b/lib-ee/emqx_ee_connector/src/emqx_ee_connector_influxdb.erl
index 09a09aa44..d2725c797 100644
--- a/lib-ee/emqx_ee_connector/src/emqx_ee_connector_influxdb.erl
+++ b/lib-ee/emqx_ee_connector/src/emqx_ee_connector_influxdb.erl
@@ -135,16 +135,15 @@ fields(basic) ->
         {precision,
             mk(enum([ns, us, ms, s, m, h]), #{
                 required => false, default => ms, desc => ?DESC("precision")
-            })},
-        {pool_size, mk(pos_integer(), #{desc => ?DESC("pool_size")})}
+            })}
     ];
 fields(influxdb_udp) ->
     fields(basic);
 fields(influxdb_api_v1) ->
     [
         {database, mk(binary(), #{required => true, desc => ?DESC("database")})},
-        {username, mk(binary(), #{required => true, desc => ?DESC("username")})},
-        {password, mk(binary(), #{required => true, desc => ?DESC("password")})}
+        {username, mk(binary(), #{desc => ?DESC("username")})},
+        {password, mk(binary(), #{desc => ?DESC("password"), format => <<"password">>})}
     ] ++ emqx_connector_schema_lib:ssl_fields() ++ fields(basic);
 fields(influxdb_api_v2) ->
     [
@@ -190,15 +189,13 @@ values(udp, put) ->
     #{
         host => <<"127.0.0.1">>,
         port => 8089,
-        precision => ms,
-        pool_size => 8
+        precision => ms
     };
 values(api_v1, put) ->
     #{
         host => <<"127.0.0.1">>,
         port => 8086,
         precision => ms,
-        pool_size => 8,
         database => <<"my_db">>,
         username => <<"my_user">>,
         password => <<"my_password">>,
@@ -209,7 +206,6 @@ values(api_v2, put) ->
         host => <<"127.0.0.1">>,
         port => 8086,
         precision => ms,
-        pool_size => 8,
         bucket => <<"my_bucket">>,
         org => <<"my_org">>,
         token => <<"my_token">>,
@@ -302,14 +298,13 @@ client_config(
     InstId,
     Config = #{
         host := Host,
-        port := Port,
-        pool_size := PoolSize
+        port := Port
     }
 ) ->
     [
         {host, binary_to_list(Host)},
         {port, Port},
-        {pool_size, PoolSize},
+        {pool_size, erlang:system_info(schedulers)},
         {pool, binary_to_atom(InstId, utf8)},
         {precision, atom_to_binary(maps:get(precision, Config, ms), utf8)}
     ] ++ protocol_config(Config).