optimize request/response examples

example/src/main/java/org/apache/rocketmq/example/rpc/AsyncRequestProducer.java

@@ -29,13 +29,11 @@ public class AsyncRequestProducer {
     private static final InternalLogger log = ClientLogger.getLog();
 
     public static void main(String[] args) throws MQClientException, InterruptedException {
-        String producerGroup = "ProducerGroup-Name";
-        String namesrvAddr = "10.255.2.37:9876;10.255.2.37:9875";
+        String producerGroup = "please_rename_unique_group_name";
         String topic = "RequestTopic";
         long ttl = 3000;
 
         DefaultMQProducer producer = new DefaultMQProducer(producerGroup);
-        producer.setNamesrvAddr(namesrvAddr);
         producer.start();
 
         try {
@@ -59,6 +57,7 @@ public class AsyncRequestProducer {
         } catch (Exception e) {
             log.warn("", e);
         }
+         /* shutdown after your request callback is finished */
 //        producer.shutdown();
     }
 }

example/src/main/java/org/apache/rocketmq/example/rpc/RequestProducer.java

@@ -28,13 +28,11 @@ public class RequestProducer {
     private static final InternalLogger log = ClientLogger.getLog();
 
     public static void main(String[] args) throws MQClientException, InterruptedException {
-        String producerGroup = "ProducerGroup-Name";
-        String namesrvAddr = "10.255.2.37:9876;10.255.2.37:9875";
+        String producerGroup = "please_rename_unique_group_name";
         String topic = "RequestTopic";
         long ttl = 3000;
 
         DefaultMQProducer producer = new DefaultMQProducer(producerGroup);
-        producer.setNamesrvAddr(namesrvAddr);
         producer.start();
 
         try {

example/src/main/java/org/apache/rocketmq/example/rpc/ResponseConsumer.java

@@ -38,12 +38,10 @@ public class ResponseConsumer {
     private static final InternalLogger log = ClientLogger.getLog();
 
     public static void main(String[] args) throws InterruptedException, MQClientException {
-        String consumerGroup = "ConsumeGroup-Name";
-        String namesrvAddr = "10.255.2.37:9873";
+        String consumerGroup = "please_rename_unique_group_name";
         String topic = "RequestTopic";
 
         DefaultMQPushConsumer consumer = new DefaultMQPushConsumer(consumerGroup);
-        consumer.setNamesrvAddr(namesrvAddr);
         consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_LAST_OFFSET);
 
         consumer.registerMessageListener(new MessageListenerConcurrently() {