fix:fix router parameter not checking bug.

pom.xml

@@ -89,7 +89,7 @@
 
 	<properties>
 		<!-- Project revision -->
-		<revision>1.8.5-2020.0.5</revision>
+		<revision>1.8.6-2020.0.5</revision>
 
 		<!-- Spring Cloud -->
 		<spring.cloud.version>2020.0.5</spring.cloud.version>

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/PolarisRouterServiceInstanceListSupplier.java

@@ -145,6 +145,8 @@ public class PolarisRouterServiceInstanceListSupplier extends DelegatingServiceI
 	Flux<List<ServiceInstance>> doRouter(Flux<List<ServiceInstance>> allServers, PolarisRouterContext routerContext) {
 		ServiceInstances serviceInstances = LoadBalancerUtils.transferServersToServiceInstances(allServers);
 
+		List<ServiceInstance> filteredInstances = new ArrayList<>();
+		if (serviceInstances.getInstances().size() > 0) {
 			// filter instance by routers
 			ProcessRoutersRequest processRoutersRequest = buildProcessRoutersRequest(serviceInstances, routerContext);
 
@@ -158,13 +160,14 @@ public class PolarisRouterServiceInstanceListSupplier extends DelegatingServiceI
 			processRouterResponseInterceptors(routerContext, processRoutersResponse);
 
 			// transfer polaris server to ServiceInstance
-		List<ServiceInstance> filteredInstances = new ArrayList<>();
 			ServiceInstances filteredServiceInstances = processRoutersResponse.getServiceInstances();
 			for (Instance instance : filteredServiceInstances.getInstances()) {
 				filteredInstances.add(new PolarisServiceInstance(instance));
 			}
 			return Flux.fromIterable(Collections.singletonList(filteredInstances));
 		}
+		return Flux.fromIterable(Collections.singletonList(filteredInstances));
+	}
 
 	ProcessRoutersRequest buildProcessRoutersRequest(ServiceInstances serviceInstances, PolarisRouterContext key) {
 		ProcessRoutersRequest processRoutersRequest = new ProcessRoutersRequest();

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/endpoint/PolarisRouterEndpoint.java

@@ -36,6 +36,7 @@ import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
 import org.springframework.boot.actuate.endpoint.annotation.ReadOperation;
 import org.springframework.boot.actuate.endpoint.annotation.Selector;
 import org.springframework.util.CollectionUtils;
+import org.springframework.util.StringUtils;
 
 /**
  * Router actuator endpoint.
@@ -53,11 +54,11 @@ public class PolarisRouterEndpoint {
 
 	@ReadOperation
 	public Map<String, Object> router(@Selector String dstService) {
-		List<RoutingProto.Route> routerRules = serviceRuleManager.getServiceRouterRule(MetadataContext.LOCAL_NAMESPACE,
-				MetadataContext.LOCAL_SERVICE, dstService);
-
 		Map<String, Object> result = new HashMap<>();
 
+		if (StringUtils.hasText(dstService)) {
+			List<RoutingProto.Route> routerRules = serviceRuleManager.getServiceRouterRule(MetadataContext.LOCAL_NAMESPACE,
+					MetadataContext.LOCAL_SERVICE, dstService);
 			List<Object> rules = new LinkedList<>();
 			result.put("routerRules", rules);
 
@@ -68,6 +69,7 @@ public class PolarisRouterEndpoint {
 			for (RoutingProto.Route route : routerRules) {
 				rules.add(parseRouterRule(route));
 			}
+		}
 
 		return result;
 	}

spring-cloud-tencent-dependencies/pom.xml

@@ -70,10 +70,10 @@
 	</developers>
 
 	<properties>
-		<revision>1.8.5-2020.0.5</revision>
+		<revision>1.8.6-2020.0.5</revision>
 
 		<!-- Dependencies -->
-		<polaris.version>1.9.3</polaris.version>
+		<polaris.version>1.9.4</polaris.version>
 		<logback.version>1.2.11</logback.version>
 		<mocktio.version>4.5.1</mocktio.version>
 		<byte-buddy.version>1.12.10</byte-buddy.version>

spring-cloud-tencent-polaris-context/src/main/java/com/tencent/cloud/polaris/context/ServiceRuleManager.java

@@ -34,6 +34,8 @@ import com.tencent.polaris.client.flow.FlowControlParam;
 import com.tencent.polaris.client.flow.ResourcesResponse;
 import com.tencent.polaris.client.pb.RateLimitProto;
 import com.tencent.polaris.client.pb.RoutingProto;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * the manager of service governance rules. for example: rate limit rule, router rules.
@@ -42,8 +44,8 @@ import com.tencent.polaris.client.pb.RoutingProto;
  */
 public class ServiceRuleManager {
 
+	private static final Logger LOG = LoggerFactory.getLogger(ServiceRuleManager.class);
 	private final SDKContext sdkContext;
-
 	private final FlowControlParam controlParam;
 
 	public ServiceRuleManager(SDKContext sdkContext) {
@@ -55,6 +57,7 @@ public class ServiceRuleManager {
 	}
 
 	public RateLimitProto.RateLimit getServiceRateLimitRule(String namespace, String service) {
+		LOG.debug("Get service rate limit rules with namespace:{} and service:{}.", namespace, service);
 		ServiceEventKey serviceEventKey = new ServiceEventKey(new ServiceKey(namespace, service),
 				ServiceEventKey.EventType.RATE_LIMITING);
 
@@ -76,6 +79,8 @@ public class ServiceRuleManager {
 	}
 
 	public List<RoutingProto.Route> getServiceRouterRule(String namespace, String sourceService, String dstService) {
+		LOG.debug("Get service router rules with namespace:{} and sourceService:{} and dstService:{}.",
+				namespace, sourceService, dstService);
 		Set<ServiceEventKey> routerKeys = new HashSet<>();
 
 		ServiceEventKey dstSvcEventKey = new ServiceEventKey(new ServiceKey(namespace, dstService),