diff --git a/src/main/java/com/telpo/iotgateway/server/IotSubscribe.java b/src/main/java/com/telpo/iotgateway/server/IotSubscribe.java
index 6ef6cad..48163db 100644
--- a/src/main/java/com/telpo/iotgateway/server/IotSubscribe.java
+++ b/src/main/java/com/telpo/iotgateway/server/IotSubscribe.java
@@ -97,15 +97,20 @@ public class IotSubscribe {
             Destination queue = (Destination)context.lookup("QUEUE");
 
             // 创建连接。
+            log.debug("Befor cf.createConnection");
             Connection connection = cf.createConnection(userInfo, password);
+            log.debug("Befor connection.addConnectionListener");
             ((JmsConnection) connection).addConnectionListener(myJmsConnectionListener);
             // 创建会话。
             // Session.CLIENT_ACKNOWLEDGE: 收到消息后，需要手动调用message.acknowledge()。
             // Session.AUTO_ACKNOWLEDGE: SDK自动ACK（推荐）。
+            log.debug("Befor connection.createSession");
             Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
+            log.debug("Befor connection.start");
             connection.start();
 
             // 创建Receiver连接。消费消息
+            log.debug("Befor session.createConsumer");
             MessageConsumer consumer = session.createConsumer(queue);
 
             // 设置消息侦听