fix(sample) fix the default nameserver address
diff --git a/samples/producer.py b/samples/producer.py
index e45ece1..0579b7b 100644
--- a/samples/producer.py
+++ b/samples/producer.py
@@ -20,7 +20,7 @@
 
 topic = 'TopicTest'
 gid = 'test'
-name_srv = '47.107.167.190:9876'
+name_srv = '127.0.0.1:9876'
 
 
 def create_message():