在zookeeper节点发生变更获取回调时打印日志信息
diff --git a/dubbo/client.py b/dubbo/client.py
index 991eef5..b8b6043 100644
--- a/dubbo/client.py
+++ b/dubbo/client.py
@@ -177,6 +177,7 @@
         :return:
         """
         path = event.path
+        logger.debug('zookeeper node changed: {}'.format(path))
         interface = path.split('/')[2]
 
         providers = self.zk.get_children(path, watch=self._watch_children)
@@ -195,6 +196,7 @@
         :return:
         """
         path = event.path
+        logger.debug('zookeeper node changed: {}'.format(path))
         interface = path.split('/')[2]
 
         # 试图从配置中取出权重相关的信息