diff --git a/connection.cpp b/connection.cpp
index 3c7fe18..bbbab16 100644
--- a/connection.cpp
+++ b/connection.cpp
@@ -237,8 +237,11 @@ int conn_manager_t::exist(ip_port_t ip_port)
  int conn_manager_t::erase(unordered_map<u64_t,conn_info_t*>::iterator erase_it)
  {
 	 ////////todo  close and erase timer_fd ,check fd64 empty   ///dont need
+
 		delete(erase_it->second);
 		mp.erase(erase_it->first);
+
+
 		return 0;
  }
 int conn_manager_t::clear_inactive()
diff --git a/connection.h b/connection.h
index dab8ab8..4a4462a 100644
--- a/connection.h
+++ b/connection.h
@@ -112,7 +112,7 @@ struct conn_info_t     //stores info for a raw connection.for client ,there is o
 	u64_t last_active_time;
 	stat_t stat;
 
-	ev_loop* loop;
+	ev_loop* loop=0;
 	int local_listen_fd;
 
 	int remote_fd;  //only used for client
@@ -123,6 +123,12 @@ struct conn_info_t     //stores info for a raw connection.for client ,there is o
 	conn_info_t()
 	{
 	}
+
+	~conn_info_t()
+	{
+		if(loop)
+			ev_timer_stop(loop,&timer);
+	}
 	void update_active_time()
 	{
 		last_active_time=get_current_time();
diff --git a/fec_manager.cpp b/fec_manager.cpp
index fcb6a2a..7a504b8 100644
--- a/fec_manager.cpp
+++ b/fec_manager.cpp
@@ -131,7 +131,7 @@ int blob_decode_t::output(int &n,char ** &s_arr,int *&len_arr)
 
 fec_encode_manager_t::~fec_encode_manager_t()
 {
-	clear();
+	clear_all();
 	//fd_manager.fd64_close(timer_fd64);
 }
 /*
@@ -168,8 +168,9 @@ int fec_encode_manager_t::reset_fec_parameter(int data_num,int redundant_num,int
 
 	assert(data_num+redundant_num<max_fec_packet_num);
 
-	clear();
+	//clear();
 
+	clear_data();
 	return 0;
 }
 int fec_encode_manager_t::append(char *s,int len/*,int &is_first_packet*/)
diff --git a/fec_manager.h b/fec_manager.h
index b61f28f..bbb5ce5 100644
--- a/fec_manager.h
+++ b/fec_manager.h
@@ -163,12 +163,23 @@ public:
 		ev_init(&timer,cb);
 	}
 
-	int clear()
+	int clear_data()
 	{
 		counter=0;
 		blob_encode.clear();
 		ready_for_output=0;
 
+		seq=(u32_t)get_fake_random_number(); //TODO temp solution for a bug.
+
+		if(loop)
+		{
+			ev_timer_stop(loop,&timer);
+		}
+		return 0;
+	}
+	int clear_all()
+	{
+
 		//itimerspec zero_its;
 		//memset(&zero_its, 0, sizeof(zero_its));
 		//timerfd_settime(timer_fd, TFD_TIMER_ABSTIME, &zero_its, 0);
@@ -179,7 +190,8 @@ public:
 			loop=0;
 			cb=0;
 		}
-		seq=(u32_t)get_fake_random_number(); //TODO temp solution for a bug.
+
+		clear_data();
 
 		return 0;
 	}
diff --git a/misc.cpp b/misc.cpp
index bcb2aef..da08439 100644
--- a/misc.cpp
+++ b/misc.cpp
@@ -328,6 +328,10 @@ int handle_command(char *s)
 	return 0;
 }
 
+static void empty_cb(struct ev_loop *loop, struct ev_timer *watcher, int revents)
+{
+
+}
 int unit_test()
 {
 
@@ -435,6 +439,10 @@ int unit_test()
 	static fec_encode_manager_t fec_encode_manager;
 	static fec_decode_manager_t fec_decode_manager;
 
+	dynamic_update_fec=0;
+
+	fec_encode_manager.set_loop_and_cb(ev_default_loop(0),empty_cb);
+
 	{
 
 		string a = "11111";
@@ -510,6 +518,7 @@ int unit_test()
 		}
 	}
 
+	printf("ok here.\n");
 	for(int i=0;i<10;i++)
 	{
 		string a = "aaaaaaaaaaaaaaaaaaaaaaa";
@@ -528,6 +537,8 @@ int unit_test()
 
 		fec_encode_manager.input((char *) a.c_str(), a.length());
 		fec_encode_manager.output(n,s_arr,len);
+
+		printf("n=<%d>\n",n);
 		assert(n==1);
 
 		fec_decode_manager.input(s_arr[0],len[0]);
@@ -575,7 +586,7 @@ int unit_test()
 
 	}
 
-
+	myexit(0);
 	return 0;
 }
 
diff --git a/tunnel_client.cpp b/tunnel_client.cpp
index 8101241..5dfbf39 100644
--- a/tunnel_client.cpp
+++ b/tunnel_client.cpp
@@ -277,6 +277,8 @@ int tunnel_client_event_loop()
 	struct ev_loop * loop= ev_default_loop(0);
 	assert(loop != NULL);
 
+	conn_info.loop=loop;
+
 	//ev.events = EPOLLIN;
 	//ev.data.u64 = local_listen_fd;
 	//ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, local_listen_fd, &ev);