diff --git a/Platform/common/rpc/rpc_conn.h b/Platform/common/rpc/rpc_conn.h
index f78c0bd38..e9d5398dc 100755
--- a/Platform/common/rpc/rpc_conn.h
+++ b/Platform/common/rpc/rpc_conn.h
@@ -48,4 +48,5 @@ void rpc_return_error(rpc_conn *conn, ret_code err_code, char* err_message);
 
 void rpc_send_message(rpc_conn *conn);
 
+void rpc_conn_freeiovdata(rpc_conn *c, pointer data1, pointer data2, pointer data3);
 #endif /* RPC_CONN_H_ */
diff --git a/Platform/common/rpc/rpc_request.h b/Platform/common/rpc/rpc_request.h
index 98b13df31..8df4b743a 100755
--- a/Platform/common/rpc/rpc_request.h
+++ b/Platform/common/rpc/rpc_request.h
@@ -29,6 +29,6 @@ rpc_request* rpc_request_copy_head(rpc_request *req);
 
 rpc_parse_result rpc_request_parse(rpc_conn *c, rpc_request **req);
 
-void rpc_request_format(const rpc_request *request, rpc_conn *c);
+ret_code rpc_request_format(const rpc_request *request, rpc_conn *c);
 
 #endif /* RPC_REQUEST_H_ */
diff --git a/Platform/common/rpc/rpc_util.h b/Platform/common/rpc/rpc_util.h
index 5d2fd59fb..53c1a052b 100755
--- a/Platform/common/rpc/rpc_util.h
+++ b/Platform/common/rpc/rpc_util.h
@@ -45,6 +45,12 @@
                    __func__, __LINE__, ##__VA_ARGS__);              \
     } while (0)  
 
+#define rpc_json_print(json_obj)                                    \
+    do {                                                            \
+           char *print_str = cJSON_Print(json_obj);                 \
+            rpc_log_info("json input:\n %s\n", print_str);          \
+            free(print_str);                                        \
+    } while (0)  
 
 #define ASSERT_RETCONN_VOID(conn,ret) \
 do { \
diff --git a/Platform/user/configm/config-server/netconfig/bridge/brconfig.c b/Platform/user/configm/config-server/netconfig/bridge/brconfig.c
index a84df7d6c..050c981ed 100644
--- a/Platform/user/configm/config-server/netconfig/bridge/brconfig.c
+++ b/Platform/user/configm/config-server/netconfig/bridge/brconfig.c
@@ -409,7 +409,7 @@ ret_code br_config_json_parse(pointer input, uint *conf_type, char *br_name)
     json_obj = cJSON_Parse(input);
     ASSERT_PTR(json_obj, RET_NULLP);
 
-    rpc_log_info("json input:\n %s\n", cJSON_Print(json_obj));
+   rpc_json_print(json_obj);
     
     s2j_create_struct_obj(br_config, br_config_string_t);
 
@@ -555,7 +555,7 @@ ret_code br_if_config_json_parse(pointer input, uint *conf_type, br_config_t *br
     json_obj = cJSON_Parse(input);
     ASSERT_PTR(json_obj, RET_NULLP);
 
-    rpc_log_info("json input:\n %s\n", cJSON_Print(json_obj));
+    rpc_json_print(json_obj);
     
     s2j_create_struct_obj(br_if_conf, br_if_config_string_t);
 
@@ -971,7 +971,7 @@ ret_code br_fdb_config_json_parse(pointer input, uint *conf_type, br_fdb_config_
     json_obj = cJSON_Parse(input);
     ASSERT_PTR(json_obj, RET_NULLP);
 
-    rpc_log_info("json input:\n %s\n", cJSON_Print(json_obj));
+    rpc_json_print(json_obj);
     
     s2j_create_struct_obj(br_fdb_conf, br_fdb_string_t);
 
diff --git a/Platform/user/configm/config-server/netconfig/ipconfig/ipconfig.c b/Platform/user/configm/config-server/netconfig/ipconfig/ipconfig.c
index 83d2bcd70..6f18d0788 100644
--- a/Platform/user/configm/config-server/netconfig/ipconfig/ipconfig.c
+++ b/Platform/user/configm/config-server/netconfig/ipconfig/ipconfig.c
@@ -72,7 +72,7 @@ ret_code ip_config_json_parse(pointer input, uint *conf_type, ip_config_t *confi
         return RET_INPUTERR;
     }
 
-    rpc_log_info("json input:\n %s \n", cJSON_Print(json_obj));
+    rpc_json_print(json_obj);
     
     s2j_create_struct_obj(ip_config, ip_config_string_t);
 
@@ -119,7 +119,7 @@ ret_code ip_config_json_parse_array(pointer input, uint *conf_type,
         return RET_INPUTERR;
     }
     
-    rpc_log_info("json input:%s \n", cJSON_Print(json_obj));
+    rpc_json_print(json_obj);
 
     iCount = cJSON_GetArraySize(json_obj); 
 
@@ -228,12 +228,12 @@ ret_code ip_config_format_json_array(ip_config_t *config_buff,
             return RET_NOMEM;
         }
         
-        cJSON_AddItemToArray(json_array, json_obj);
-        
         s2j_json_set_basic_element(json_obj, ip_config, string, ifname);
         s2j_json_set_basic_element(json_obj, ip_config, int, family);
         s2j_json_set_basic_element(json_obj, ip_config, string, ipaddr);
         s2j_json_set_basic_element(json_obj, ip_config, int, prefixlen);
+
+        cJSON_AddItemToArray(json_array, json_obj);
     }
     
 
diff --git a/Platform/user/configm/config-server/static_routing_config/static_routing_config.c b/Platform/user/configm/config-server/static_routing_config/static_routing_config.c
index e81c29c1d..bc92235b4 100644
--- a/Platform/user/configm/config-server/static_routing_config/static_routing_config.c
+++ b/Platform/user/configm/config-server/static_routing_config/static_routing_config.c
@@ -75,13 +75,13 @@ ret_code routing_to_json(int count, routing_t *buff_total, pointer output, int *
 			cJSON_AddNumberToObject(json_obj,"metric",buff_total[i].metric);
 			
             cJSON_AddItemToArray(json_array, json_obj);
-            rpc_log_info("json_obj: %s\n",cJSON_Print(json_obj));
+            rpc_json_print(json_obj);
 
          }
        	
           cJSON_AddItemToObject(ret_root,"route",json_array);
        	}
-	rpc_log_info("check: %s\n",cJSON_Print(ret_root));
+	rpc_json_print(ret_root);
 	 
 	json_routing = cJSON_PrintUnformatted(ret_root);
     *output_len = strlen(json_routing) + 1;
@@ -107,7 +107,7 @@ ret_code routing_json_parse(pointer input, uint *conf_type, routing_t *conf_buff
 		return RET_EMPTY_STRING;
     }
 
-    rpc_log_info("json input:\n %s \n", cJSON_Print(json_obj));
+    rpc_json_print(json_obj);
 
 	operate = cJSON_GetObjectItem(json_obj,"operate");
 	
diff --git a/Platform/user/configm/config-server/web_config/authfree.c b/Platform/user/configm/config-server/web_config/authfree.c
index c9d917894..f96edaba4 100644
--- a/Platform/user/configm/config-server/web_config/authfree.c
+++ b/Platform/user/configm/config-server/web_config/authfree.c
@@ -311,7 +311,7 @@ ret_code authfree_config_json_parse_array(pointer input, uint *conf_type, freeau
         return RET_INPUTERR;
     }
 
-    rpc_log_info("json input:%s \n", cJSON_Print(cjson));
+    rpc_json_print(cjson);
 
     /*获取免认证规则的data部分 */
     data = cJSON_GetObjectItem(cjson, "data");
diff --git a/Platform/user/rpc/rpc_client.c b/Platform/user/rpc/rpc_client.c
index 2faaacd8d..0b6608bb8 100755
--- a/Platform/user/rpc/rpc_client.c
+++ b/Platform/user/rpc/rpc_client.c
@@ -292,12 +292,7 @@ ret_code rpc_client_call_async(rpc_client* client, char* service_name,
     rpc_log_dbg("rpc_client_call_async:send_message\n");
 
     //write data
-    rpc_request_format(req, conn);
-
-    if(conn->sfd == -1 || rpc_client_send(conn) == FALSE)
-    {
-        ret = RET_SENDERR;
-    }
+    ret = rpc_request_format(req, conn);
     
     pthread_mutex_unlock(&th->mutex);
 
diff --git a/Platform/user/rpc/rpc_conn.c b/Platform/user/rpc/rpc_conn.c
index 2bca9a407..65bac1518 100755
--- a/Platform/user/rpc/rpc_conn.c
+++ b/Platform/user/rpc/rpc_conn.c
@@ -424,6 +424,29 @@ void rpc_conn_addiov(rpc_conn *c, pointer data, size_t data_len) {
 	c->iovused++;
 }
 
+void rpc_conn_freeiovdata(rpc_conn *c, pointer data1, pointer data2, pointer data3) {
+	int i = 0;
+
+	if(c == NULL || data1 == NULL
+	   || data2 == NULL || data3 == NULL){
+		return;
+	}
+
+	for(i = 0; i < c->iovused; i++){
+        if(c->iov[i].iov_base == data1
+			|| c->iov[i].iov_base == data2
+			|| c->iov[i].iov_base == data3){
+			c->iov[i].iov_base = NULL;
+		}
+	}
+
+	rpc_free(data1);
+	rpc_free(data2);
+	rpc_free(data3);
+
+	c->iovused = 0;
+}
+
 boolean rpc_client_send(rpc_conn *conn) {
 	struct msghdr m;
     boolean ret = TRUE;
@@ -460,7 +483,7 @@ boolean rpc_client_send(rpc_conn *conn) {
 		}
 	}
 	//TODO free resource
-	conn->iovused = 0;
+	//conn->iovused = 0;
     return ret;
 }
 
@@ -492,34 +515,37 @@ void rpc_send_message(rpc_conn *conn) {
 			} else {
 				perror("failed to write");
 				rpc_conn_close(conn);
+				return;
 			}
 		} else {
 			break;
 		}
 	}
 	//TODO free resource
-	conn->iovused = 0;
+	//conn->iovused = 0;
 }
 
 static inline void rpc_send_response(rpc_conn *conn, ret_code code,
 		pointer output, int output_len) {
 	//status line
-	char *data;
-	data = rpc_vsprintf("%s %d %s\n", RPC_VERSION, (int) code, rpc_code_format(
+	char *data1, *data2, *data3;
+	data1 = rpc_vsprintf("%s %d %s\n", RPC_VERSION, (int) code, rpc_code_format(
 			code));
-	rpc_conn_addiov(conn, data, strlen(data));
+	rpc_conn_addiov(conn, data1, strlen(data1));
 	//seq
-	data = rpc_vsprintf("seq:%d\n", conn->curr_seq);
-	rpc_conn_addiov(conn, data, strlen(data));
+	data2 = rpc_vsprintf("seq:%d\n", conn->curr_seq);
+	rpc_conn_addiov(conn, data2, strlen(data2));
 	//body-len
-	data = rpc_vsprintf("body-len:%d\n\n", output_len);
-	rpc_conn_addiov(conn, data, strlen(data));
+	data3 = rpc_vsprintf("body-len:%d\n\n", output_len);
+	rpc_conn_addiov(conn, data3, strlen(data3));
 	//body
 	if (output) {
 		rpc_conn_addiov(conn, output, output_len);
 	}
-    rpc_log_dbg("rpc_send_response: %s\n", data);
+    rpc_log_dbg("rpc_send_response: %s\n", data3);
 	rpc_send_message(conn);
+
+	rpc_conn_freeiovdata(conn, data1, data2, data3);
 }
 
 void rpc_return(rpc_conn *conn, pointer output, int output_len) {
diff --git a/Platform/user/rpc/rpc_request.c b/Platform/user/rpc/rpc_request.c
index 2ba7d4374..69b62075a 100755
--- a/Platform/user/rpc/rpc_request.c
+++ b/Platform/user/rpc/rpc_request.c
@@ -160,23 +160,33 @@ rpc_parse_result rpc_request_parse(rpc_conn *c, rpc_request **req) {
 	return RPC_Parse_Error;
 }
 
-void rpc_request_format(const rpc_request *request, rpc_conn *c) {
+ret_code rpc_request_format(const rpc_request *request, rpc_conn *c) {
+	ret_code ret = RET_OK;
+	char *data1, *data2, *data3;
 	assert(request !=NULL);
 	assert(c != NULL);
-	char *data;
 	//request line
-	data = rpc_vsprintf("CALL %s@%s %s\n", request->method_name,
+	data1 = rpc_vsprintf("CALL %s@%s %s\n", request->method_name,
 			request->service_name, RPC_VERSION);
-	rpc_conn_addiov(c, data, strlen(data));
+	rpc_conn_addiov(c, data1, strlen(data1));
 	//seq
-	data = rpc_vsprintf("seq:%d\n", request->seq);
-	rpc_conn_addiov(c, data, strlen(data));
+	data2 = rpc_vsprintf("seq:%d\n", request->seq);
+	rpc_conn_addiov(c, data2, strlen(data2));
 	//body len
-	data = rpc_vsprintf("body-len:%d\n\n", request->input_len);
-	rpc_conn_addiov(c, data, strlen(data));
+	data3 = rpc_vsprintf("body-len:%d\n\n", request->input_len);
+	rpc_conn_addiov(c, data3, strlen(data3));
     
-    rpc_log_dbg("request data:%s\n", data);
+    rpc_log_dbg("request data:%s\n", data3);
 	//body
 	if (request->input)
 		rpc_conn_addiov(c, request->input, request->input_len);
+
+	if(c->sfd == -1 || rpc_client_send(c) == FALSE)
+    {
+        ret = RET_SENDERR;
+    }
+
+	rpc_conn_freeiovdata(c, data1, data2, data3);
+
+	return ret;
 }
diff --git a/Platform/user/rpc/rpc_thread.c b/Platform/user/rpc/rpc_thread.c
index c31f79663..202124b8d 100755
--- a/Platform/user/rpc/rpc_thread.c
+++ b/Platform/user/rpc/rpc_thread.c
@@ -422,7 +422,7 @@ static void* thread_write_hander(void* data) {
             
             //write data
             rpc_request_format(req, conn);
-            rpc_client_send(conn);
+            //rpc_client_send(conn);
         }
 	}
 	return NULL;