fixed NEP when Upgrading to 1.1.7 from old version (#5089)

Co-authored-by: Allen GAN <allen.gan@schindler.com>

connector/rabbitmq-connector/src/main/java/com/alibaba/otter/canal/connector/rabbitmq/producer/CanalRabbitMQProducer.java

@@ -72,12 +72,23 @@ public class CanalRabbitMQProducer extends AbstractMQProducer implements CanalMQ
         try {
             connect = factory.newConnection();
             channel = connect.createChannel();
-            channel.queueDeclare(rabbitMQProperties.getQueue(), true, false, false, null);
-            channel.exchangeDeclare(rabbitMQProperties
-                .getExchange(), rabbitMQProperties.getDeliveryMode(), true, false, false, null);
-            channel.queueBind(rabbitMQProperties.getQueue(),
-                rabbitMQProperties.getExchange(),
-                rabbitMQProperties.getRoutingKey());
+            String queue=rabbitMQProperties.getQueue();
+            String exchange=rabbitMQProperties.getExchange();
+            String deliveryMode=rabbitMQProperties.getDeliveryMode();
+            String routingKey=rabbitMQProperties.getRoutingKey();
+            if(!StringUtils.isEmpty(queue))
+            {
+                channel.queueDeclare(queue, true, false, false, null);
+            }
+            if(!StringUtils.isEmpty(queue)
+                &&!StringUtils.isEmpty(exchange)
+                &&!StringUtils.isEmpty(deliveryMode)
+                &&!StringUtils.isEmpty(routingKey))
+            {
+                channel.exchangeDeclare(exchange, deliveryMode, true, false, false, null);
+                channel.queueBind(queue,exchange,routingKey);
+            }
+            
 
         } catch (IOException | TimeoutException ex) {
             throw new CanalException("Start RabbitMQ producer error", ex);

deployer/src/main/resources/canal.properties

@@ -177,6 +177,7 @@ rabbitmq.exchange =
 rabbitmq.username =
 rabbitmq.password =
 rabbitmq.deliveryMode =
+rabbitmq.queue =
 
 
 ##################################################