fix:fix the error capture of rate limit exception.

CHANGELOG.md

@@ -4,3 +4,4 @@
 - [docs:Add code coverage blocking.](https://github.com/Tencent/spring-cloud-tencent/pull/836)
 - [docs:Add license checker GitHub Action.](https://github.com/Tencent/spring-cloud-tencent/pull/839)
 - [refactor:move loadbalancer to discovery module.](https://github.com/Tencent/spring-cloud-tencent/pull/844)
+- [fix:fix the error capture of rate limit exception.](https://github.com/Tencent/spring-cloud-tencent/pull/854)

spring-cloud-tencent-examples/polaris-ratelimit-example/ratelimit-callee-service/src/main/java/com/tencent/cloud/ratelimit/example/service/callee/BusinessController.java

@@ -46,15 +46,12 @@ public class BusinessController {
 	private static final Logger LOG = LoggerFactory.getLogger(BusinessController.class);
 
 	private final AtomicInteger index = new AtomicInteger(0);
-
+	private final AtomicLong lastTimestamp = new AtomicLong(0);
 	@Autowired
 	private RestTemplate restTemplate;
-
 	@Value("${spring.application.name}")
 	private String appName;
 
-	private AtomicLong lastTimestamp = new AtomicLong(0);
-
 	/**
 	 * Get information.
 	 * @return information
@@ -87,6 +84,7 @@ public class BusinessController {
 			}).start();
 		}
 		count.await();
+		index.set(0);
 		return builder.toString();
 	}
 

spring-cloud-tencent-rpc-enhancement/src/main/java/com/tencent/cloud/rpc/enhancement/resttemplate/EnhancedRestTemplateReporter.java

@@ -44,6 +44,7 @@ import org.springframework.context.ApplicationContextAware;
 import org.springframework.http.HttpMethod;
 import org.springframework.http.client.ClientHttpResponse;
 import org.springframework.lang.NonNull;
+import org.springframework.web.client.DefaultResponseErrorHandler;
 import org.springframework.web.client.ResponseErrorHandler;
 
 import static com.tencent.cloud.common.constant.ContextConstant.UTF_8;
@@ -69,6 +70,9 @@ public class EnhancedRestTemplateReporter extends AbstractPolarisReporterAdapter
 	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
 		String[] handlerBeanNames = applicationContext.getBeanNamesForType(ResponseErrorHandler.class);
 		if (handlerBeanNames.length == 1) {
+			if (this.delegateHandler == null) {
+				this.delegateHandler = new DefaultResponseErrorHandler();
+			}
 			return;
 		}