diff --git a/apps/efka/src/efka_agent.erl b/apps/efka/src/efka_agent.erl
index a925b21..422611f 100644
--- a/apps/efka/src/efka_agent.erl
+++ b/apps/efka/src/efka_agent.erl
@@ -45,15 +45,18 @@
 %%%===================================================================
 
 %% 发送数据
+-spec metric_data(ServiceId :: binary(), LineProtocolData :: binary()) -> no_return().
 metric_data(ServiceId, LineProtocolData) when is_binary(ServiceId), is_binary(LineProtocolData) ->
     gen_server:cast(?SERVER, {metric_data, ServiceId, LineProtocolData}).
 
 ping(AdCode, BootTime, Province, City, EfkaVersion, KernelArch, Ips, CpuCore, CpuLoad, CpuTemperature, Disk, Memory, Interfaces) ->
     gen_server:cast(?SERVER, {ping, AdCode, BootTime, Province, City, EfkaVersion, KernelArch, Ips, CpuCore, CpuLoad, CpuTemperature, Disk, Memory, Interfaces}).
 
+-spec feedback_phase(TaskId :: integer(), Timestamp :: integer(), Phase :: binary(), Code :: integer()) -> no_return().
 feedback_phase(TaskId, Timestamp, Phase, Code) when is_integer(TaskId), is_integer(Timestamp), is_binary(Phase), is_integer(Code) ->
     gen_server:cast(?SERVER, {feedback_phase, TaskId, Timestamp, Phase, Code, <<"">>}).
 
+-spec feedback_phase(TaskId :: integer(), Timestamp :: integer(), Phase :: binary(), Code :: integer(), Message :: binary()) -> no_return().
 feedback_phase(TaskId, Timestamp, Phase, Code, Message) when is_integer(TaskId), is_integer(Timestamp), is_binary(Phase), is_integer(Code), is_binary(Message) ->
     gen_server:cast(?SERVER, {feedback_phase, TaskId, Timestamp, Phase, Code, Message}).
 
@@ -83,7 +86,7 @@ start_link() ->
 init([]) ->
     erlang:process_flag(trap_exit, true),
     erlang:start_timer(0, self(), create_transport),
-    {ok, #state{}}.
+    {ok, #state{status = ?STATE_DENIED}}.
 
 %% @private
 %% @doc Handling call messages
@@ -112,17 +115,12 @@ handle_cast({metric_data, ServiceId, LineProtocolData}, State = #state{status =
         metric = LineProtocolData
     }),
 
-    case Status =:= ?STATE_ACTIVATED of
+    case Status =:= ?STATE_ACTIVATED andalso is_pid(TransportPid) of
         true ->
             efka_transport:send(TransportPid, ?METHOD_DATA, Packet);
         false ->
-            ok = micro_cache_model:insert(#micro_cache {
-                id = micro_cache_model:next_id(),
-                method = ?METHOD_DATA,
-                data = Packet
-            })
+            ok = micro_cache_model:insert(?METHOD_DATA, Packet)
     end,
-
     {noreply, State};
 
 %% Event事件
@@ -137,11 +135,7 @@ handle_cast({event, ServiceId, EventType, Params}, State = #state{status = Statu
         true ->
             efka_transport:send(TransportPid, ?METHOD_EVENT, EventPacket);
         false ->
-            ok = micro_cache_model:insert(#micro_cache {
-                id = micro_cache_model:next_id(),
-                method = ?METHOD_EVENT,
-                data = EventPacket
-            })
+            ok = micro_cache_model:insert(?METHOD_EVENT, EventPacket)
     end,
 
     {noreply, State};
@@ -158,11 +152,7 @@ handle_cast({ai_event, ServiceId, EventType, Params}, State = #state{status = St
         true ->
             efka_transport:send(TransportPid, ?METHOD_AI_EVENT, EventPacket);
         false ->
-            ok = micro_cache_model:insert(#micro_cache {
-                id = micro_cache_model:next_id(),
-                method = ?METHOD_AI_EVENT,
-                data = EventPacket
-            })
+            ok = micro_cache_model:insert(?METHOD_AI_EVENT, EventPacket)
     end,
 
     {noreply, State};
@@ -180,11 +170,7 @@ handle_cast({feedback_phase, TaskId, Timestamp, Phase, Code, Message}, State = #
         true ->
             efka_transport:send(TransportPid, ?METHOD_PHASE, PhasePacket);
         false ->
-            ok = micro_cache_model:insert(#micro_cache {
-                id = micro_cache_model:next_id(),
-                method = ?METHOD_PHASE,
-                data = PhasePacket
-            })
+            ok = micro_cache_model:insert(?METHOD_PHASE, PhasePacket)
     end,
 
     {noreply, State};
diff --git a/apps/efka/src/efka_micro_service.erl b/apps/efka/src/efka_micro_service.erl
index b320b78..3b5e0e2 100644
--- a/apps/efka/src/efka_micro_service.erl
+++ b/apps/efka/src/efka_micro_service.erl
@@ -303,7 +303,7 @@ handle_info({Port, {exit_status, Code}}, State = #state{service_id = ServiceId})
 %% 处理channel进程的退出
 handle_info({'DOWN', _Ref, process, ChannelPid, Reason}, State = #state{channel_pid = ChannelPid, service_id = ServiceId}) ->
     lager:debug("[efka_micro_service] service: ~p, channel exited: ~p", [ServiceId, Reason]),
-    {noreply, State#state{channel_pid = undefined}}.
+    {noreply, State#state{channel_pid = undefined, inflight = #{}}}.
 
 %% @private
 %% @doc This function is called by a gen_server when it is about to
diff --git a/apps/efka/src/mnesia/micro_cache_model.erl b/apps/efka/src/mnesia/micro_cache_model.erl
index 672209d..92eab08 100644
--- a/apps/efka/src/mnesia/micro_cache_model.erl
+++ b/apps/efka/src/mnesia/micro_cache_model.erl
@@ -15,7 +15,7 @@
 
 %% API
 -export([create_table/0]).
--export([insert/1, get_all_cache/0, fetch_next/0, delete/1, next_id/0]).
+-export([insert/2, get_all_cache/0, fetch_next/0, delete/1, next_id/0]).
 
 create_table() ->
     %% id生成器
@@ -29,8 +29,9 @@ create_table() ->
 next_id() ->
     id_generator_model:next_id(?TAB).
 
--spec insert(MicroData0 :: #micro_cache{}) -> ok | {error, Reason :: any()}.
-insert(Cache = #micro_cache{}) ->
+-spec insert(Method :: integer(), Data :: binary()) -> ok | {error, Reason :: any()}.
+insert(Method, Data) when is_integer(Method), is_binary(Data) ->
+    Cache = #micro_cache{id = next_id(), method = Method, data = Data},
     case mnesia:transaction(fun() -> mnesia:write(?TAB, Cache, write) end) of
         {'atomic', ok} ->
             ok;