Fix RocketMQ pollable and sql example (#3385)

* Fix RocketMQ pollable and sql example

spring-cloud-alibaba-examples/rocketmq-example/readme-zh.md

@@ -681,6 +681,17 @@ public class RocketMQSqlConsumeApplication {
 }
 ```
 
+#### 常见问题
+
+- MQClientException: The broker does not support consumer to filter message by SQL92  
+1. 修改 RocketMQ 服务端配置文件。
+在 `conf/2m-2s-async/broker-a.properties` 配置文件末尾添加 `enablePropertyFilter=true`  
+2. 重启 mqbroker 并指定配置文件。
+`mqbroker` 启动时指定配置文件：`conf/2m-2s-async/broker-a.properties`，例如：
+```shell
+bin/mqbroker -n 127.0.0.1:9876 -c conf/2m-2s-async/broker-a.properties autoCreateTopicEnable=true  
+```
+
 ## 事务消息示例
 
 ### 什么是事务消息?

spring-cloud-alibaba-examples/rocketmq-example/readme.md

@@ -675,6 +675,17 @@ public class RocketMQSqlConsumeApplication {
 }
 ```
 
+#### 常见问题
+
+- MQClientException: The broker does not support consumer to filter message by SQL92
+1. Modify RocketMQ server configuration file.
+   In the `conf/2m-2s-async/broker-a.properties` configuration file, add `enablePropertyFilter=true`.
+2. Restart mqbroker and specify the configuration file.
+   Specify the configuration file when `mqbroker` starts: `conf/2m-2s-async/broker-a.properties`, for example:
+```shell
+bin/mqbroker -n 127.0.0.1:9876 -c conf/2m-2s-async/broker-a.properties autoCreateTopicEnable=true  
+```
+
 ## Transaction example
 
 ### What is transactional message?

spring-cloud-alibaba-examples/rocketmq-example/rocketmq-pollable-consume-example/src/main/java/com/alibaba/cloud/examples/pollable/RocketMQPollableConsumeApplication.java

@@ -30,6 +30,7 @@ import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.cloud.stream.binder.PollableMessageSource;
 import org.springframework.cloud.stream.function.StreamBridge;
+import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.core.ParameterizedTypeReference;
 import org.springframework.messaging.Message;
@@ -48,7 +49,24 @@ public class RocketMQPollableConsumeApplication {
 	private StreamBridge streamBridge;
 
 	public static void main(String[] args) {
-		SpringApplication.run(RocketMQPollableConsumeApplication.class, args);
+		ConfigurableApplicationContext context = SpringApplication.run(RocketMQPollableConsumeApplication.class, args);
+		PollableMessageSource destIn = context.getBean(PollableMessageSource.class);
+		new Thread(() -> {
+			while (true) {
+				try {
+					if (!destIn.poll((m) -> {
+						SimpleMsg newPayload = (SimpleMsg) m.getPayload();
+						System.out.println(newPayload.getMsg());
+					}, new ParameterizedTypeReference<SimpleMsg>() {
+					})) {
+						Thread.sleep(1000);
+					}
+				}
+				catch (Exception e) {
+					// handle failure
+				}
+			}
+		}).start();
 	}
 
 	@Bean
@@ -65,22 +83,4 @@ public class RocketMQPollableConsumeApplication {
 		};
 	}
 
-	@Bean
-	public ApplicationRunner pollableRunner(PollableMessageSource destIn) {
-		return args -> {
-			while (true) {
-				try {
-					if (!destIn.poll((m) -> {
-						SimpleMsg newPayload = (SimpleMsg) m.getPayload();
-						System.out.println(newPayload.getMsg());
-					}, new ParameterizedTypeReference<SimpleMsg>() { })) {
-						Thread.sleep(1000);
-					}
-				}
-				catch (Exception e) {
-					// handle failure
-				}
-			}
-		};
-	}
 }