diff --git a/dns_client.c b/dns_client.c
index 6d858a7..cdd479e 100644
--- a/dns_client.c
+++ b/dns_client.c
@@ -366,7 +366,7 @@ void _dns_client_period_run()
 	{
 		if (now - query->send_tick > 500) {
 			atomic_set(&query->dns_request_sent, -1);
-			_dns_client_query_release(query, 1);
+			//_dns_client_query_release(query, 1);
 		}
 	}
 	pthread_mutex_unlock(&client.domain_map_lock);
@@ -584,6 +584,7 @@ static int _dns_client_send_udp(struct dns_server_info *server_info, void *packe
 	send_len = sendto(client.udp, packet, len, 0, (struct sockaddr *)&server_info->addr, server_info->addr_len);
 	if (send_len != len) {
 		printf("send to server failed.");
+		abort();
 		return -1;
 	}
 
@@ -612,6 +613,7 @@ static int _dns_client_send_packet(struct dns_query_struct *query, void *packet,
 			continue;
 		}
 
+
 		atomic_inc(&query->dns_request_sent);
 	}
 	pthread_mutex_unlock(&client.server_list_lock);
@@ -669,13 +671,6 @@ int dns_client_query(char *domain, dns_client_callback callback, void *user_ptr)
 	query->sid = atomic_inc_return(&dns_client_sid);
 
 	_dns_client_query_get(query);
-	ret = _dns_client_send_query(query, domain);
-	if (ret != 0) {
-		goto errout_del_list;
-	}
-
-	tlog(TLOG_INFO, "send request %s, id %d\n", domain, query->sid);
-
 	key = hash_string(domain);
 	key = jhash(&query->sid, sizeof(query->sid), key);
 	pthread_mutex_lock(&client.domain_map_lock);
@@ -683,6 +678,13 @@ int dns_client_query(char *domain, dns_client_callback callback, void *user_ptr)
 	hash_add(client.domain_map, &query->domain_node, key);
 	pthread_mutex_unlock(&client.domain_map_lock);
 
+	ret = _dns_client_send_query(query, domain);
+	if (ret != 0) {
+		goto errout_del_list;
+	}
+
+	tlog(TLOG_INFO, "send request %s, id %d\n", domain, query->sid);
+
 	return 0;
 errout_del_list:
 	atomic_dec(&query->refcnt);