fix: fix merge conflict

.github/PULL_REQUEST_TEMPLATE.md

 <!--  Thanks for sending a pull request!
-Read https://github.com/apache/dubbo-go/blob/master/contributing.md before commit pull request. 
+Read https://github.com/apache/dubbo-go/blob/master/contributing.md before commit pull request.
 -->
 
 **What this PR does**:

.github/workflows/github-actions.yml

@@ -35,7 +35,7 @@ jobs:
       uses: actions/checkout@v2
 
     - name: Cache dependencies
-      uses: actions/cache@v2
+      uses: actions/cache@v2.1.4
       with:
         # Cache
         path: ~/go/pkg/mod
@@ -69,9 +69,9 @@ jobs:
       run: |
         make verify
 
-    - name: Integrate Test
-      run: |
-        chmod +x integrate_test.sh && ./integrate_test.sh ${{github.event.pull_request.head.repo.full_name}} ${{github.event.pull_request.head.sha}}
+#    - name: Integrate Test
+#      run: |
+#        chmod +x integrate_test.sh && ./integrate_test.sh ${{github.event.pull_request.head.repo.full_name}} ${{github.event.pull_request.head.sha}}
 
     - name: Post Coverage
       run: bash <(curl -s https://codecov.io/bash)

CHANGE.md

 # Release Notes
 ---
+## 1.5.6
+
+### New Features
+- [Add dubbo-go-cli telnet tool](https://github.com/apache/dubbo-go/pull/818)
+- [Add Prox ImplementFunc to allow override impl](https://github.com/apache/dubbo-go/pull/1019)
+- [Add read configuration path from the command line when start](https://github.com/apache/dubbo-go/pull/1039)
+
+### Enhancement
+- [introduce ConfigPostProcessor extension](https://github.com/apache/dubbo-go/pull/943)
+- [Impl extension of two urls comparison](https://github.com/apache/dubbo-go/pull/854)
+- [using event-driven to let router send signal to notify channel](https://github.com/apache/dubbo-go/pull/976)
+- [lint codes](https://github.com/apache/dubbo-go/pull/941)
+
+### Bugfixes
+- [Fix: generic struct2MapAll key of map keep type](https://github.com/apache/dubbo-go/pull/928)
+- [Fix: when events empty, delete all the invokers](https://github.com/apache/dubbo-go/pull/758)
+- [Fix: file service discovery run in windows](https://github.com/apache/dubbo-go/pull/932)
+- [Fix: make metadata report work without serviceDiscovery](https://github.com/apache/dubbo-go/pull/948)
+- [Fix: consumer invoker cache set nil after the ZK connection is lost](https://github.com/apache/dubbo-go/pull/985)
+- [Fix: integration test in Github action](https://github.com/apache/dubbo-go/pull/1012)
+- [Fix: etcd exit panic](https://github.com/apache/dubbo-go/pull/1013)
+- [Fix: when connect to provider fail, will occur panic](https://github.com/apache/dubbo-go/pull/1021)
+- [Fix: support getty send Length, when the data transfer failed](https://github.com/apache/dubbo-go/pull/1028)
+
+Milestone: [https://github.com/apache/dubbo-go/milestone/7](https://github.com/apache/dubbo-go/milestone/7?closed=1)
+
+## 1.5.5
+
+### New Features
+- [Add Address notification batch mode](https://github.com/apache/dubbo-go/pull/741) 
+- [Add dubbo-gen stream support](https://github.com/apache/dubbo-go/pull/794) 
+- [Add Change verify to Makefile](https://github.com/apache/dubbo-go/pull/831) 
+- [Add more automatic components](https://github.com/apache/dubbo-go/pull/832) 
+- [Add grpc max message size config](https://github.com/apache/dubbo-go/pull/824) 
+
+### Enhancement
+- [when it need local ip, it will get it every time. We can get local ip once, and reused it](https://github.com/apache/dubbo-go/pull/807) 
+- [enhance client's connectivity](https://github.com/apache/dubbo-go/pull/800) 
+- [Imp: get local ip once and reused it](https://github.com/apache/dubbo-go/pull/808) 
+- [Remove unmeaning logic](https://github.com/apache/dubbo-go/pull/855) 
+
+### Bugfixes
+- [Fix: nacos registry can not get namespaceId](https://github.com/apache/dubbo-go/pull/778) [@peaman](https://github.com/peaman)       
+- [Fix: url encode](https://github.com/apache/dubbo-go/pull/802)       
+- [Fix: try to fix too many files open error](https://github.com/apache/dubbo-go/pull/797)       
+- [Fix: refact heartbeat](https://github.com/apache/dubbo-go/pull/889)       
+- [Fix: router_config add &url to url](https://github.com/apache/dubbo-go/pull/910)       
+- [Fix: Router chain can not build immediately when started](https://github.com/apache/dubbo-go/pull/927)       
+- [Fix: client block until timeout when provider return with PackageResponse_Exception](https://github.com/apache/dubbo-go/pull/926)      
+- [Fix: URL.String() data race panic](https://github.com/apache/dubbo-go/pull/944)
+- [Fix: generic "encode hessian.Object"](https://github.com/apache/dubbo-go/pull/945)
+
+### Dependencies
+- [Bump github.com/mitchellh/mapstructure from 1.2.3 to 1.3.3](https://github.com/apache/dubbo-go/pull/838)
+- [Bump github.com/go-resty/resty/v2 from 2.1.0 to 2.3.0](https://github.com/apache/dubbo-go/pull/837)
+- [Bump github.com/opentracing/opentracing-go from 1.1.0 to 1.2.0](https://github.com/apache/dubbo-go/pull/836)
+- [Bump github.com/creasty/defaults from 1.3.0 to 1.5.1](https://github.com/apache/dubbo-go/pull/835)
+- [Bump github.com/dubbogo/gost from 1.9.1 to 1.9.2](https://github.com/apache/dubbo-go/pull/834)
+- [Bump github.com/zouyx/agollo/v3 from 3.4.4 to 3.4.5](https://github.com/apache/dubbo-go/pull/845)
+- [Bump github.com/golang/mock from 1.3.1 to 1.4.4](https://github.com/apache/dubbo-go/pull/844)
+- [Bump github.com/nacos-group/nacos-sdk-go from 1.0.0 to 1.0.1](https://github.com/apache/dubbo-go/pull/843)
+- [Bump github.com/magiconair/properties from 1.8.1 to 1.8.4](https://github.com/apache/dubbo-go/pull/861)
+- [Bump github.com/prometheus/client_golang from 1.1.0 to 1.8.0 ](https://github.com/apache/dubbo-go/pull/860)
+- [Bump go.uber.org/atomic from 1.6.0 to 1.7.0](https://github.com/apache/dubbo-go/pull/859)
+- [](https://github.com/apache/dubbo-go/pull/843)
+
+Milestone: [https://github.com/apache/dubbo-go/milestone/5](https://github.com/apache/dubbo-go/milestone/5?closed=1)
+
 ## 1.4.5
 
 ### Bugfixes
@@ -7,6 +75,51 @@
 
 ## 1.5.4
 
+### Bugfixes
+- [Fix etcd cluster reconnect](https://github.com/apache/dubbo-go/pull/828)
+- [Fix zookeeper deadlock problem](https://github.com/apache/dubbo-go/pull/826)
+- [Fix generic struct2MapAll](https://github.com/apache/dubbo-go/pull/822)
+- [Fix Consumer panic when restart provider](https://github.com/apache/dubbo-go/pull/803)
+- [Fix etcd can not registry](https://github.com/apache/dubbo-go/pull/819) [@lin-jianjun](https://github.com/lin-jianjun)
+- [Fix cannot call go provider service when used by java dubbo 2.7.7 version](https://github.com/apache/dubbo-go/pull/815) [@jack15083](https://github.com/jack15083)
+- [Fix go client quit abnormally when it connects java server](https://github.com/apache/dubbo-go/pull/820) [@wenxuwan](https://github.com/wenxuwan)
+- [Fix sentinel windows issue](https://github.com/apache/dubbo-go/pull/821) [@louyuting](https://github.com/louyuting)
+- [Fix metadata default port](https://github.com/apache/dubbo-go/pull/821) [@sanxun0325](https://github.com/sanxun0325)
+- [Fix consul can not destory](https://github.com/apache/dubbo-go/pull/788) [@LaurenceLiZhixin](https://github.com/LaurenceLiZhixin)
+
+Milestone: [https://github.com/apache/dubbo-go/milestone/6](https://github.com/apache/dubbo-go/milestone/6?closed=1)
+
+## 1.5.3
+
+### New Features
+- [Add consul service discovery](https://github.com/apache/dubbo-go/pull/701) [@zhangshen023](https://github.com/zhangshen023)
+- [Add File system service discovery](https://github.com/apache/dubbo-go/pull/732) [@DogBaoBao](https://github.com/DogBaoBao)
+- [Migrate travis Ci to Github Actions](https://github.com/apache/dubbo-go/pull/752) [@sdttttt](https://github.com/sdttttt)
+- [Add sentinel-golang flow control/circuit breaker](https://github.com/apache/dubbo-go/pull/748) [@louyuting](https://github.com/louyuting)
+- [Add dubbo-go docs and blog into doc directory](https://github.com/apache/dubbo-go/pull/767) [@oaoit](https://github.com/oaoit)
+
+### Enhancement
+- [Add address notification batch mode](https://github.com/apache/dubbo-go/pull/741) [@beiwei30](https://github.com/beiwei30)
+- [Refactor network and codec model](https://github.com/apache/dubbo-go/pull/673) [@fangyincheng](https://github.com/fangyincheng) [@georgehao](https://github.com/georgehao)
+- [Remove unnecessary return and judgement](https://github.com/apache/dubbo-go/pull/730) [@YongHaoWu](https://github.com/YongHaoWu)
+- [Improve exporter append method](https://github.com/apache/dubbo-go/pull/722) [@gaoxinge](https://github.com/gaoxinge)
+- [Refactor for proxyInvoker cannot be extended](https://github.com/apache/dubbo-go/pull/747) [@cvictory](https://github.com/cvictory)
+- [Refactor attachment type from map\[string\]stiring to map\[string\]interface{}](https://github.com/apache/dubbo-go/pull/713) [@cvictory](https://github.com/cvictory)
+- [Improve map access concurrency](https://github.com/apache/dubbo-go/pull/739) [@skyao](https://github.com/skyao)
+- [Improve code quantity](https://github.com/apache/dubbo-go/pull/763) [@gaoxinge](https://github.com/gaoxinge)
+
+### Bugfixes
+- [Fix etcdv3 lease](https://github.com/apache/dubbo-go/pull/738) [@zhangshen023](https://github.com/zhangshen023)
+- [Fix rename SethealthChecker to SetHealthChecker](https://github.com/apache/dubbo-go/pull/746) [@watermelo](https://github.com/watermelo)
+- [Fix init config problem in HystrixFilter](https://github.com/apache/dubbo-go/pull/731) [@YGrylls](https://github.com/YGrylls)
+- [Fix zookeeper listener report error after started](https://github.com/apache/dubbo-go/pull/735) [@wenxuwan](https://github.com/wenxuwan)
+
+Milestone: [https://github.com/apache/dubbo-go/milestone/4](https://github.com/apache/dubbo-go/milestone/4?closed=1)
+
+Project: [https://github.com/apache/dubbo-go/projects/10](https://github.com/apache/dubbo-go/projects/10)
+
+## 1.5.4
+
 ### Bugfixes
 - [Fix etcd cluster reconnect](https://github.com/apache/dubbo-go/pull/828)  
 - [Fix zookeeper deadlock problem](https://github.com/apache/dubbo-go/pull/826)      
@@ -171,7 +284,7 @@ Project: [https://github.com/apache/dubbo-go/projects/8](https://github.com/apac
 - [Add grpc protocol](https://github.com/apache/dubbo-go/pull/311)
 
 ### Enhancement
-    
+
 - [The SIGSYS and SIGSTOP are not supported in windows platform](https://github.com/apache/dubbo-go/pull/262)
 - [Error should be returned when `NewURL` failed](https://github.com/apache/dubbo-go/pull/266)
 - [Split config center GetConfig method](https://github.com/apache/dubbo-go/pull/267)
@@ -181,7 +294,7 @@ Project: [https://github.com/apache/dubbo-go/projects/8](https://github.com/apac
 - [Change zk version and add base_registry](https://github.com/apache/dubbo-go/pull/355)
 
 ### Bugfixes
-    
+
 - [Fix negative wait group count](https://github.com/apache/dubbo-go/pull/253)
 - [After disconnection with ZK registry, cosumer can't listen to provider changes](https://github.com/apache/dubbo-go/pull/258)
 - [The generic filter and default reference filters lack ','](https://github.com/apache/dubbo-go/pull/260)

README.md

 # Apache Dubbo-go [中文](./README_CN.md) #
 
-[![Build Status](https://travis-ci.org/apache/dubbo-go.svg?branch=master)](https://travis-ci.org/apache/dubbo-go)
+[![Build Status](https://github.com/apache/dubbo-go/workflows/CI/badge.svg)](https://travis-ci.org/apache/dubbo-go)
 [![codecov](https://codecov.io/gh/apache/dubbo-go/branch/master/graph/badge.svg)](https://codecov.io/gh/apache/dubbo-go)
 [![go.dev reference](https://img.shields.io/badge/go.dev-reference-007d9c?logo=go&logoColor=white&style=flat-square)](https://pkg.go.dev/github.com/apache/dubbo-go?tab=doc)
 [![Go Report Card](https://goreportcard.com/badge/github.com/apache/dubbo-go)](https://goreportcard.com/report/github.com/apache/dubbo-go)
@@ -8,7 +8,7 @@
 
 ---
 
-Apache Dubbo Go Implementation.
+Apache Dubbo Go Implementation to bridge the gap between java and go.
 
 
 ## License
@@ -45,7 +45,7 @@ Both extension module and layered project architecture is according to Apache Du
 
 ![dubbo go extend](./doc/pic/arch/dubbo-go-ext.png)
 
-If you wanna know more about dubbo-go, please visit this reference [Project Architecture design](https://github.com/apache/dubbo-go/wiki/dubbo-go-V1.0-design)
+If you want to know more about dubbo-go, please visit this reference [Project Architecture design](https://github.com/apache/dubbo-go/wiki/dubbo-go-V1.0-design)
 
 ## Feature list ##
 
@@ -179,8 +179,21 @@ If you are willing to do some code contributions and document contributions to [
 
 If u want to communicate with our community, pls scan the following  [dubbobo Ding-Ding QR code](https://mmbiz.qpic.cn/mmbiz_jpg/yvBJb5IiafvnHVBdtia30dxA2hKotr9DEckWsZ7aOJcDWDaSVMGwLmYv8GRgIQtqb4C2svicp8nVkMmGy7yKC5tyA/640?wx_fmt=jpeg&tp=webp&wxfrom=5&wx_lazy=1&wx_co=1) or search our commnity DingDing group code 31363295.
 
-<a href="http://alexstocks.github.io/html/dubbogo.html">
-<img src="./doc/pic/misc/dubbogo-dingding.png"  height="80" width="80"></a>
+<div>
+<table>
+  <tbody>
+  <tr></tr>
+    <tr>
+      <td align="center"  valign="middle">
+        <a href="http://alexstocks.github.io/html/dubbogo.html" target="_blank">
+          <img width="80px" height="85px" src="./doc/pic/misc/dubbogo-dingding.png">
+        </a>
+      </td>
+    </tr>
+    <tr></tr>
+  </tbody>
+</table>
+</div>
 
 If u want to visit the wechat group, pls add my wechat AlexanderStocks.
 
@@ -194,7 +207,7 @@ About dubbo-go benchmarking report, please refer to [dubbo benchmarking report](
 
 ## [User List](https://github.com/apache/dubbo-go/issues/2)
 
-If you are using [apache/dubbo-go](github.com/apache/dubbo-go) and think that it helps you or want do some contributions to it, please add your company to to [the user list](https://github.com/apache/dubbo-go/issues/2) to let us know your needs.
+If you are using [apache/dubbo-go](https://github.com/apache/dubbo-go) and think that it helps you or want do some contributions to it, please add your company to to [the user list](https://github.com/apache/dubbo-go/issues/2) to let us know your needs.
 
 
 <div>

README_CN.md

 # Apache Dubbo-go [English](./README.md) #
 
-[![Build Status](https://travis-ci.org/apache/dubbo-go.svg?branch=master)](https://travis-ci.org/apache/dubbo-go)
+[![Build Status](https://github.com/apache/dubbo-go/workflows/CI/badge.svg)](https://travis-ci.org/apache/dubbo-go)
 [![codecov](https://codecov.io/gh/apache/dubbo-go/branch/master/graph/badge.svg)](https://codecov.io/gh/apache/dubbo-go)
 [![go.dev reference](https://img.shields.io/badge/go.dev-reference-007d9c?logo=go&logoColor=white&style=flat-square)](https://pkg.go.dev/github.com/apache/dubbo-go?tab=doc)
 [![Go Report Card](https://goreportcard.com/badge/github.com/apache/dubbo-go)](https://goreportcard.com/report/github.com/apache/dubbo-go)
 ![license](https://img.shields.io/badge/license-Apache--2.0-green.svg)
 
 ---
-Apache Dubbo Go 语言实现
+
+Apache Dubbo Go 语言实现，架起java和go之间的桥梁，与 gRPC/Spring Cloud 生态互联互通，带领Java生态享受云原生时代的技术红利。
 
 ## 证书 ##
 
@@ -177,12 +178,25 @@ make test
 
 如果想访问官方钉钉群，请在钉钉中搜索社区群号 31363295 或者 扫描如下[二维码](https://mmbiz.qpic.cn/mmbiz_jpg/yvBJb5IiafvnHVBdtia30dxA2hKotr9DEckWsZ7aOJcDWDaSVMGwLmYv8GRgIQtqb4C2svicp8nVkMmGy7yKC5tyA/640?wx_fmt=jpeg&tp=webp&wxfrom=5&wx_lazy=1&wx_co=1)。
 
-<a href="http://alexstocks.github.io/html/dubbogo.html">
-<img src="./doc/pic/misc/dubbogo-dingding.png"  height="80" width="80"></a>
+<div>
+<table>
+  <tbody>
+  <tr></tr>
+    <tr>
+      <td align="center"  valign="middle">
+        <a href="http://alexstocks.github.io/html/dubbogo.html" target="_blank">
+          <img width="80px" height="85px" src="./doc/pic/misc/dubbogo-dingding.png">
+        </a>
+      </td>
+    </tr>
+    <tr></tr>
+  </tbody>
+</table>
+</div>
 
-如果想加入到社区微信群，可以先添加社区负责人 于雨 的微信 AlexanderStocks 。
+如果想加入到社区微信群，可以先添加社区负责人 于雨 的微信 AlexanderStocks 。添加微信之前，请先给 dubbo-go 点 star 作为对项目的支持，添加好友时请报上 github ID 以进行验证。
 
-作为一个维护已经帮助构建了经受多家大型微服务系统的社区，我们足以为现有的成绩感到自豪。社区欢迎能提出建设性意见者。
+作为一个维护已经帮助构建了经受多家大型微服务系统的社区，我们足以为现有的成绩感到自豪。社区欢迎能提出建设性意见者，只知索取者和喷子请绕行。
 
 ## 性能测试 ##
 
@@ -192,7 +206,7 @@ make test
 
 ## [User List](https://github.com/apache/dubbo-go/issues/2)
 
-若你正在使用 [apache/dubbo-go](github.com/apache/dubbo-go) 且认为其有用或者想对其做改进，请添列贵司信息于 [用户列表](https://github.com/apache/dubbo-go/issues/2)，以便我们知晓。
+若你正在使用 [apache/dubbo-go](https://github.com/apache/dubbo-go) 且认为其有用或者想对其做改进，请添列贵司信息于 [用户列表](https://github.com/apache/dubbo-go/issues/2)，以便我们知晓。
 
 <div>
 <table>

cluster/cluster_impl/base_cluster_invoker.go

@@ -121,41 +121,49 @@ func (invoker *baseClusterInvoker) doSelect(lb cluster.LoadBalance, invocation p
 
 func (invoker *baseClusterInvoker) doSelectInvoker(lb cluster.LoadBalance, invocation protocol.Invocation, invokers []protocol.Invoker, invoked []protocol.Invoker) protocol.Invoker {
 	if len(invokers) == 0 {
-		logger.Errorf("the invokers of %s is nil. ", invocation.Invoker().GetUrl().ServiceKey())
 		return nil
 	}
+	go protocol.TryRefreshBlackList()
 	if len(invokers) == 1 {
-		return invokers[0]
+		if invokers[0].IsAvailable() {
+			return invokers[0]
+		}
+		protocol.SetInvokerUnhealthyStatus(invokers[0])
+		logger.Errorf("the invokers of %s is nil. ", invokers[0].GetUrl().ServiceKey())
+		return nil
 	}
 
 	selectedInvoker := lb.Select(invokers, invocation)
 
-	//judge to if the selectedInvoker is invoked
-
+	//judge if the selected Invoker is invoked and available
 	if (!selectedInvoker.IsAvailable() && invoker.availablecheck) || isInvoked(selectedInvoker, invoked) {
+		protocol.SetInvokerUnhealthyStatus(selectedInvoker)
+		otherInvokers := getOtherInvokers(invokers, selectedInvoker)
 		// do reselect
-		var reslectInvokers []protocol.Invoker
-
-		for _, invoker := range invokers {
-			if !invoker.IsAvailable() {
+		for i := 0; i < 3; i++ {
+			if len(otherInvokers) == 0 {
+				// no other ivk to reselect, return to fallback
+				break
+			}
+			reselectedInvoker := lb.Select(otherInvokers, invocation)
+			if isInvoked(reselectedInvoker, invoked) {
+				otherInvokers = getOtherInvokers(otherInvokers, reselectedInvoker)
+				continue
+			}
+			if !reselectedInvoker.IsAvailable() {
 				logger.Infof("the invoker of %s is not available, maybe some network error happened or the server is shutdown.",
 					invoker.GetUrl().Ip)
+				protocol.SetInvokerUnhealthyStatus(reselectedInvoker)
+				otherInvokers = getOtherInvokers(otherInvokers, reselectedInvoker)
 				continue
 			}
-
-			if !isInvoked(invoker, invoked) {
-				reslectInvokers = append(reslectInvokers, invoker)
-			}
-		}
-
-		if len(reslectInvokers) > 0 {
-			selectedInvoker = lb.Select(reslectInvokers, invocation)
-		} else {
-			logger.Errorf("all %d invokers is unavailable for %s.", len(invokers), selectedInvoker.GetUrl().String())
-			return nil
+			return reselectedInvoker
 		}
+	} else {
+		return selectedInvoker
 	}
-	return selectedInvoker
+	logger.Errorf("all %d invokers is unavailable for %s.", len(invokers), selectedInvoker.GetUrl().String())
+	return nil
 }
 
 func (invoker *baseClusterInvoker) Invoke(ctx context.Context, invocation protocol.Invocation) protocol.Result {
@@ -194,3 +202,13 @@ func getLoadBalance(invoker protocol.Invoker, invocation protocol.Invocation) cl
 	}
 	return extension.GetLoadbalance(lb)
 }
+
+func getOtherInvokers(invokers []protocol.Invoker, invoker protocol.Invoker) []protocol.Invoker {
+	otherInvokers := make([]protocol.Invoker, 0)
+	for _, i := range invokers {
+		if i != invoker {
+			otherInvokers = append(otherInvokers, i)
+		}
+	}
+	return otherInvokers
+}

cluster/cluster_impl/failback_cluster_test.go

@@ -72,6 +72,8 @@ func TestFailbackSuceess(t *testing.T) {
 
 	invoker.EXPECT().GetUrl().Return(failbackUrl).AnyTimes()
 
+	invoker.EXPECT().IsAvailable().Return(true)
+
 	mockResult := &protocol.RPCResult{Rest: rest{tried: 0, success: true}}
 	invoker.EXPECT().Invoke(gomock.Any()).Return(mockResult)
 
@@ -88,6 +90,7 @@ func TestFailbackRetryOneSuccess(t *testing.T) {
 	clusterInvoker := registerFailback(invoker).(*failbackClusterInvoker)
 
 	invoker.EXPECT().GetUrl().Return(failbackUrl).AnyTimes()
+	invoker.EXPECT().IsAvailable().Return(true)
 
 	// failed at first
 	mockFailedResult := &protocol.RPCResult{Err: perrors.New("error")}
@@ -98,6 +101,7 @@ func TestFailbackRetryOneSuccess(t *testing.T) {
 	wg.Add(1)
 	now := time.Now()
 	mockSuccResult := &protocol.RPCResult{Rest: rest{tried: 0, success: true}}
+	invoker.EXPECT().IsAvailable().Return(true)
 	invoker.EXPECT().Invoke(gomock.Any()).DoAndReturn(func(protocol.Invocation) protocol.Result {
 		delta := time.Since(now).Nanoseconds() / int64(time.Second)
 		assert.True(t, delta >= 5)
@@ -131,6 +135,7 @@ func TestFailbackRetryFailed(t *testing.T) {
 	clusterInvoker := registerFailback(invoker).(*failbackClusterInvoker)
 
 	invoker.EXPECT().GetUrl().Return(failbackUrl).AnyTimes()
+	invoker.EXPECT().IsAvailable().Return(true).AnyTimes()
 
 	mockFailedResult := &protocol.RPCResult{Err: perrors.New("error")}
 	invoker.EXPECT().Invoke(gomock.Any()).Return(mockFailedResult)
@@ -177,6 +182,7 @@ func TestFailbackRetryFailed10Times(t *testing.T) {
 	clusterInvoker := registerFailback(invoker).(*failbackClusterInvoker)
 	clusterInvoker.maxRetries = 10
 
+	invoker.EXPECT().IsAvailable().Return(true).AnyTimes()
 	invoker.EXPECT().GetUrl().Return(failbackUrl).AnyTimes()
 
 	// 10 task should failed firstly.
@@ -220,6 +226,7 @@ func TestFailbackOutOfLimit(t *testing.T) {
 	clusterInvoker.failbackTasks = 1
 
 	invoker.EXPECT().GetUrl().Return(failbackUrl).AnyTimes()
+	invoker.EXPECT().IsAvailable().Return(true).AnyTimes()
 
 	mockFailedResult := &protocol.RPCResult{Err: perrors.New("error")}
 	invoker.EXPECT().Invoke(gomock.Any()).Return(mockFailedResult).Times(11)

cluster/cluster_impl/failfast_cluster_test.go

@@ -53,6 +53,7 @@ func registerFailfast(invoker *mock.MockInvoker) protocol.Invoker {
 	invokers := []protocol.Invoker{}
 	invokers = append(invokers, invoker)
 
+	invoker.EXPECT().IsAvailable().Return(true).AnyTimes()
 	invoker.EXPECT().GetUrl().Return(failfastUrl)
 
 	staticDir := directory.NewStaticDirectory(invokers)
@@ -67,6 +68,7 @@ func TestFailfastInvokeSuccess(t *testing.T) {
 	invoker := mock.NewMockInvoker(ctrl)
 	clusterInvoker := registerFailfast(invoker)
 
+	invoker.EXPECT().IsAvailable().Return(true).AnyTimes()
 	invoker.EXPECT().GetUrl().Return(failfastUrl).AnyTimes()
 
 	mockResult := &protocol.RPCResult{Rest: rest{tried: 0, success: true}}
@@ -87,6 +89,7 @@ func TestFailfastInvokeFail(t *testing.T) {
 	invoker := mock.NewMockInvoker(ctrl)
 	clusterInvoker := registerFailfast(invoker)
 
+	invoker.EXPECT().IsAvailable().Return(true).AnyTimes()
 	invoker.EXPECT().GetUrl().Return(failfastUrl).AnyTimes()
 
 	mockResult := &protocol.RPCResult{Err: perrors.New("error")}

cluster/cluster_impl/failsafe_cluster_test.go

@@ -52,6 +52,7 @@ func registerFailsafe(invoker *mock.MockInvoker) protocol.Invoker {
 
 	invokers := []protocol.Invoker{}
 	invokers = append(invokers, invoker)
+	invoker.EXPECT().IsAvailable().Return(true).AnyTimes()
 
 	invoker.EXPECT().GetUrl().Return(failbackUrl)
 
@@ -67,6 +68,8 @@ func TestFailSafeInvokeSuccess(t *testing.T) {
 	invoker := mock.NewMockInvoker(ctrl)
 	clusterInvoker := registerFailsafe(invoker)
 
+	invoker.EXPECT().IsAvailable().Return(true).AnyTimes()
+
 	invoker.EXPECT().GetUrl().Return(failsafeUrl).AnyTimes()
 
 	mockResult := &protocol.RPCResult{Rest: rest{tried: 0, success: true}}
@@ -85,6 +88,7 @@ func TestFailSafeInvokeFail(t *testing.T) {
 
 	invoker := mock.NewMockInvoker(ctrl)
 	clusterInvoker := registerFailsafe(invoker)
+	invoker.EXPECT().IsAvailable().Return(true).AnyTimes()
 
 	invoker.EXPECT().GetUrl().Return(failsafeUrl).AnyTimes()
 

cluster/directory/base_directory.go

@@ -82,6 +82,8 @@ func (dir *BaseDirectory) SetRouters(urls []*common.URL) {
 
 	routers := make([]router.PriorityRouter, 0, len(urls))
 
+	rc := dir.routerChain
+
 	for _, url := range urls {
 		routerKey := url.GetParam(constant.ROUTER_KEY, "")
 
@@ -94,7 +96,7 @@ func (dir *BaseDirectory) SetRouters(urls []*common.URL) {
 			}
 		}
 		factory := extension.GetRouterFactory(url.Protocol)
-		r, err := factory.NewPriorityRouter(url)
+		r, err := factory.NewPriorityRouter(url, rc.GetNotifyChan())
 		if err != nil {
 			logger.Errorf("Create router fail. router key: %s, url:%s, error: %+v", routerKey, url.Service(), err)
 			return
@@ -104,10 +106,8 @@ func (dir *BaseDirectory) SetRouters(urls []*common.URL) {
 
 	logger.Infof("Init file condition router success, size: %v", len(routers))
 	dir.mutex.Lock()
-	rc := dir.routerChain
-	dir.mutex.Unlock()
-
 	rc.AddRouters(routers)
+	dir.mutex.Unlock()
 }
 
 func (dir *BaseDirectory) isProperRouter(url *common.URL) bool {

cluster/directory/base_directory_test.go

@@ -28,6 +28,7 @@ import (
 )
 
 import (
+	"github.com/apache/dubbo-go/cluster/router/chain"
 	_ "github.com/apache/dubbo-go/cluster/router/condition"
 	"github.com/apache/dubbo-go/common"
 	"github.com/apache/dubbo-go/common/constant"
@@ -50,7 +51,9 @@ func TestBuildRouterChain(t *testing.T) {
 	regURL := url
 	regURL.AddParam(constant.INTERFACE_KEY, "mock-app")
 	directory := NewBaseDirectory(regURL)
-
+	var err error
+	directory.routerChain, err = chain.NewRouterChain(regURL)
+	assert.Nil(t, err)
 	localIP := common.GetLocalIp()
 	rule := base64.URLEncoding.EncodeToString([]byte("true => " + " host = " + localIP))
 	routeURL := getRouteURL(rule, anyURL)

cluster/router/chain.go

@@ -29,4 +29,6 @@ type Chain interface {
 	SetInvokers([]protocol.Invoker)
 	// AddRouters Add routers
 	AddRouters([]PriorityRouter)
+	// GetNotifyChan get notify channel of this chain
+	GetNotifyChan() chan struct{}
 }

cluster/router/chain/chain.go

@@ -20,12 +20,12 @@ package chain
 import (
 	"sort"
 	"sync"
-	"sync/atomic"
 	"time"
 )
 
 import (
 	perrors "github.com/pkg/errors"
+	"go.uber.org/atomic"
 )
 
 import (
@@ -38,9 +38,7 @@ import (
 )
 
 const (
-	timeInterval   = 5 * time.Second
-	timeThreshold  = 2 * time.Second
-	countThreshold = 5
+	timeInterval = 5 * time.Second
 )
 
 // RouterChain Router chain
@@ -65,8 +63,10 @@ type RouterChain struct {
 	notify chan struct{}
 	// Address cache
 	cache atomic.Value
-	// init
-	init sync.Once
+}
+
+func (c *RouterChain) GetNotifyChan() chan struct{} {
+	return c.notify
 }
 
 // Route Loop routers in RouterChain and call Route method to determine the target invokers list.
@@ -104,6 +104,9 @@ func (c *RouterChain) AddRouters(routers []router.PriorityRouter) {
 	c.mutex.Lock()
 	defer c.mutex.Unlock()
 	c.routers = newRouters
+	go func() {
+		c.notify <- struct{}{}
+	}()
 }
 
 // SetInvokers receives updated invokers from registry center. If the times of notification exceeds countThreshold and
@@ -113,32 +116,21 @@ func (c *RouterChain) SetInvokers(invokers []protocol.Invoker) {
 	c.invokers = invokers
 	c.mutex.Unlock()
 
-	// it should trigger init router for first call
-	c.init.Do(func() {
-		go func() {
-			c.notify <- struct{}{}
-		}()
-	})
-
-	c.count++
-	now := time.Now()
-	if c.count >= countThreshold && now.Sub(c.last) >= timeThreshold {
-		c.last = now
-		c.count = 0
-		go func() {
-			c.notify <- struct{}{}
-		}()
-	}
+	go func() {
+		c.notify <- struct{}{}
+	}()
 }
 
-// loop listens on events to update the address cache when it's necessary, either when it receives notification
-// from address update, or when timeInterval exceeds.
+// loop listens on events to update the address cache  when it receives notification
+// from address update,
 func (c *RouterChain) loop() {
 	ticker := time.NewTicker(timeInterval)
 	for {
 		select {
 		case <-ticker.C:
-			c.buildCache()
+			if protocol.GetAndRefreshState() {
+				c.buildCache()
+			}
 		case <-c.notify:
 			c.buildCache()
 		}
@@ -235,9 +227,15 @@ func NewRouterChain(url *common.URL) (*RouterChain, error) {
 	if len(routerFactories) == 0 {
 		return nil, perrors.Errorf("No routerFactory exits , create one please")
 	}
+
+	chain := &RouterChain{
+		last:   time.Now(),
+		notify: make(chan struct{}),
+	}
+
 	routers := make([]router.PriorityRouter, 0, len(routerFactories))
 	for key, routerFactory := range routerFactories {
-		r, err := routerFactory().NewPriorityRouter(url)
+		r, err := routerFactory().NewPriorityRouter(url, chain.notify)
 		if r == nil || err != nil {
 			logger.Errorf("router chain build router fail! routerFactories key:%s  error:%s", key, err.Error())
 			continue
@@ -250,12 +248,10 @@ func NewRouterChain(url *common.URL) (*RouterChain, error) {
 
 	sortRouter(newRouters)
 
-	chain := &RouterChain{
-		builtinRouters: routers,
-		routers:        newRouters,
-		last:           time.Now(),
-		notify:         make(chan struct{}),
-	}
+	routerNeedsUpdateInit := atomic.Bool{}
+	routerNeedsUpdateInit.Store(false)
+	chain.routers = newRouters
+	chain.builtinRouters = routers
 	if url != nil {
 		chain.url = url
 	}

cluster/router/chain/chain_test.go

@@ -148,7 +148,12 @@ conditions:
 	url := getConditionRouteUrl(applicationKey)
 	assert.NotNil(t, url)
 	factory := extension.GetRouterFactory(url.Protocol)
-	r, err := factory.NewPriorityRouter(url)
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
+	r, err := factory.NewPriorityRouter(url, notify)
 	assert.Nil(t, err)
 	assert.NotNil(t, r)
 

cluster/router/condition/app_router.go

@@ -34,14 +34,15 @@ const (
 // AppRouter For listen application router with config center
 type AppRouter struct {
 	listenableRouter
+	notify interface{}
 }
 
 // NewAppRouter Init AppRouter by url
-func NewAppRouter(url *common.URL) (*AppRouter, error) {
+func NewAppRouter(url *common.URL, notify chan struct{}) (*AppRouter, error) {
 	if url == nil {
 		return nil, perrors.Errorf("No route URL for create app router!")
 	}
-	appRouter, err := newListenableRouter(url, url.GetParam(constant.APPLICATION_KEY, ""))
+	appRouter, err := newListenableRouter(url, url.GetParam(constant.APPLICATION_KEY, ""), notify)
 	if err != nil {
 		return nil, err
 	}

cluster/router/condition/app_router_test.go

@@ -81,7 +81,12 @@ conditions:
 	assert.NotNil(t, configuration)
 
 	appRouteURL := getAppRouteURL(routerKey)
-	appRouter, err := NewAppRouter(appRouteURL)
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
+	appRouter, err := NewAppRouter(appRouteURL, notify)
 	assert.Nil(t, err)
 	assert.NotNil(t, appRouter)
 
@@ -109,7 +114,7 @@ force: true
 runtime: false
 conditions:
   - => host != 172.22.3.91
-  - host = 192.168.199.208 => host = 192.168.199.208 
+  - host = 192.168.199.208 => host = 192.168.199.208
 `
 	ts, z, _, err := zookeeper.NewMockZookeeperClient("test", 15*time.Second)
 	assert.NoError(t, err)
@@ -132,7 +137,12 @@ conditions:
 	assert.NotNil(t, configuration)
 
 	appRouteURL := getAppRouteURL(routerKey)
-	appRouter, err := NewAppRouter(appRouteURL)
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
+	appRouter, err := NewAppRouter(appRouteURL, notify)
 	assert.Nil(t, err)
 	assert.NotNil(t, appRouter)
 
@@ -174,7 +184,12 @@ conditions:
 	assert.NotNil(t, configuration)
 
 	appRouteURL := getAppRouteURL(routerKey)
-	appRouter, err := NewAppRouter(appRouteURL)
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
+	appRouter, err := NewAppRouter(appRouteURL, notify)
 	assert.Nil(t, err)
 	assert.NotNil(t, appRouter)
 

cluster/router/condition/factory.go

@@ -37,8 +37,8 @@ func newConditionRouterFactory() router.PriorityRouterFactory {
 }
 
 // NewPriorityRouter creates ConditionRouterFactory by URL
-func (c *ConditionRouterFactory) NewPriorityRouter(url *common.URL) (router.PriorityRouter, error) {
-	return NewConditionRouter(url)
+func (c *ConditionRouterFactory) NewPriorityRouter(url *common.URL, notify chan struct{}) (router.PriorityRouter, error) {
+	return NewConditionRouter(url, notify)
 }
 
 // NewRouter Create FileRouterFactory by Content
@@ -54,6 +54,6 @@ func newAppRouterFactory() router.PriorityRouterFactory {
 }
 
 // NewPriorityRouter creates AppRouterFactory by URL
-func (c *AppRouterFactory) NewPriorityRouter(url *common.URL) (router.PriorityRouter, error) {
-	return NewAppRouter(url)
+func (c *AppRouterFactory) NewPriorityRouter(url *common.URL, notify chan struct{}) (router.PriorityRouter, error) {
+	return NewAppRouter(url, notify)
 }

cluster/router/condition/factory_test.go

@@ -132,37 +132,47 @@ func (bi *MockInvoker) Destroy() {
 func TestRoute_matchWhen(t *testing.T) {
 	inv := &invocation.RPCInvocation{}
 	rule := base64.URLEncoding.EncodeToString([]byte("=> host = 1.2.3.4"))
-	router, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule))
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
+	router, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule), notify)
 	cUrl, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, factory1111Ip))
 	matchWhen := router.(*ConditionRouter).MatchWhen(cUrl, inv)
 	assert.Equal(t, true, matchWhen)
 	rule1 := base64.URLEncoding.EncodeToString([]byte("host = 2.2.2.2,1.1.1.1,3.3.3.3 => host = 1.2.3.4"))
-	router1, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule1))
+	router1, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule1), notify)
 	matchWhen1 := router1.(*ConditionRouter).MatchWhen(cUrl, inv)
 	assert.Equal(t, true, matchWhen1)
 	rule2 := base64.URLEncoding.EncodeToString([]byte("host = 2.2.2.2,1.1.1.1,3.3.3.3 & host !=1.1.1.1 => host = 1.2.3.4"))
-	router2, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule2))
+	router2, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule2), notify)
 	matchWhen2 := router2.(*ConditionRouter).MatchWhen(cUrl, inv)
 	assert.Equal(t, false, matchWhen2)
 	rule3 := base64.URLEncoding.EncodeToString([]byte("host !=4.4.4.4 & host = 2.2.2.2,1.1.1.1,3.3.3.3 => host = 1.2.3.4"))
-	router3, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule3))
+	router3, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule3), notify)
 	matchWhen3 := router3.(*ConditionRouter).MatchWhen(cUrl, inv)
 	assert.Equal(t, true, matchWhen3)
 	rule4 := base64.URLEncoding.EncodeToString([]byte("host !=4.4.4.* & host = 2.2.2.2,1.1.1.1,3.3.3.3 => host = 1.2.3.4"))
-	router4, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule4))
+	router4, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule4), notify)
 	matchWhen4 := router4.(*ConditionRouter).MatchWhen(cUrl, inv)
 	assert.Equal(t, true, matchWhen4)
 	rule5 := base64.URLEncoding.EncodeToString([]byte("host = 2.2.2.2,1.1.1.*,3.3.3.3 & host != 1.1.1.1 => host = 1.2.3.4"))
-	router5, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule5))
+	router5, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule5), notify)
 	matchWhen5 := router5.(*ConditionRouter).MatchWhen(cUrl, inv)
 	assert.Equal(t, false, matchWhen5)
 	rule6 := base64.URLEncoding.EncodeToString([]byte("host = 2.2.2.2,1.1.1.*,3.3.3.3 & host != 1.1.1.2 => host = 1.2.3.4"))
-	router6, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule6))
+	router6, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule6), notify)
 	matchWhen6 := router6.(*ConditionRouter).MatchWhen(cUrl, inv)
 	assert.Equal(t, true, matchWhen6)
 }
 
 func TestRoute_matchFilter(t *testing.T) {
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
 	localIP := common.GetLocalIp()
 	t.Logf("The local ip is %s", localIP)
 	url1, _ := common.NewURL("dubbo://10.20.3.3:20880/com.foo.BarService?default.serialization=fastjson")
@@ -175,12 +185,12 @@ func TestRoute_matchFilter(t *testing.T) {
 	rule4 := base64.URLEncoding.EncodeToString([]byte("host = " + localIP + " => " + " host = 10.20.3.2,10.20.3.3,10.20.3.4"))
 	rule5 := base64.URLEncoding.EncodeToString([]byte("host = " + localIP + " => " + " host != 10.20.3.3"))
 	rule6 := base64.URLEncoding.EncodeToString([]byte("host = " + localIP + " => " + " serialization = fastjson"))
-	router1, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule1))
-	router2, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule2))
-	router3, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule3))
-	router4, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule4))
-	router5, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule5))
-	router6, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule6))
+	router1, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule1), notify)
+	router2, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule2), notify)
+	router3, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule3), notify)
+	router4, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule4), notify)
+	router5, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule5), notify)
+	router6, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule6), notify)
 	cUrl, _ := common.NewURL(fmt.Sprintf(factoryConsumerFormat, localIP))
 	ret1 := router1.Route(utils.ToBitmap(invokers), setUpAddrCache(invokers), cUrl, &invocation.RPCInvocation{})
 	ret2 := router2.Route(utils.ToBitmap(invokers), setUpAddrCache(invokers), cUrl, &invocation.RPCInvocation{})
@@ -198,9 +208,14 @@ func TestRoute_matchFilter(t *testing.T) {
 }
 
 func TestRoute_methodRoute(t *testing.T) {
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
 	inv := invocation.NewRPCInvocationWithOptions(invocation.WithMethodName("getFoo"), invocation.WithParameterTypes([]reflect.Type{}), invocation.WithArguments([]interface{}{}))
 	rule := base64.URLEncoding.EncodeToString([]byte("host !=4.4.4.* & host = 2.2.2.2,1.1.1.1,3.3.3.3 => host = 1.2.3.4"))
-	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule))
+	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule), notify)
 	url, _ := common.NewURL("consumer://1.1.1.1/com.foo.BarService?methods=setFoo,getFoo,findFoo")
 	matchWhen := r.(*ConditionRouter).MatchWhen(url, inv)
 	assert.Equal(t, true, matchWhen)
@@ -209,42 +224,57 @@ func TestRoute_methodRoute(t *testing.T) {
 	assert.Equal(t, true, matchWhen)
 	url2, _ := common.NewURL(fmt.Sprintf(factoryConsumerMethodFormat, factory1111Ip))
 	rule2 := base64.URLEncoding.EncodeToString([]byte("methods=getFoo & host!=1.1.1.1 => host = 1.2.3.4"))
-	router2, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule2))
+	router2, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule2), notify)
 	matchWhen = router2.(*ConditionRouter).MatchWhen(url2, inv)
 	assert.Equal(t, false, matchWhen)
 	url3, _ := common.NewURL(fmt.Sprintf(factoryConsumerMethodFormat, factory1111Ip))
 	rule3 := base64.URLEncoding.EncodeToString([]byte("methods=getFoo & host=1.1.1.1 => host = 1.2.3.4"))
-	router3, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule3))
+	router3, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule3), notify)
 	matchWhen = router3.(*ConditionRouter).MatchWhen(url3, inv)
 	assert.Equal(t, true, matchWhen)
 
 }
 
 func TestRoute_ReturnFalse(t *testing.T) {
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
 	url, _ := common.NewURL("")
 	localIP := common.GetLocalIp()
 	invokers := []protocol.Invoker{NewMockInvoker(url, 1), NewMockInvoker(url, 2), NewMockInvoker(url, 3)}
 	inv := &invocation.RPCInvocation{}
 	rule := base64.URLEncoding.EncodeToString([]byte("host = " + localIP + " => false"))
 	curl, _ := common.NewURL(fmt.Sprintf(factoryConsumerFormat, localIP))
-	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule))
+	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule), notify)
 	ret := r.Route(utils.ToBitmap(invokers), setUpAddrCache(invokers), curl, inv)
 	assert.Equal(t, 0, len(ret.ToArray()))
 }
 
 func TestRoute_ReturnEmpty(t *testing.T) {
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
 	localIP := common.GetLocalIp()
 	url, _ := common.NewURL("")
 	invokers := []protocol.Invoker{NewMockInvoker(url, 1), NewMockInvoker(url, 2), NewMockInvoker(url, 3)}
 	inv := &invocation.RPCInvocation{}
 	rule := base64.URLEncoding.EncodeToString([]byte("host = " + localIP + " => "))
 	curl, _ := common.NewURL(fmt.Sprintf(factoryConsumerFormat, localIP))
-	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule))
+	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule), notify)
 	ret := r.Route(utils.ToBitmap(invokers), setUpAddrCache(invokers), curl, inv)
 	assert.Equal(t, 0, len(ret.ToArray()))
 }
 
 func TestRoute_ReturnAll(t *testing.T) {
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
 	localIP := common.GetLocalIp()
 	urlString := "dubbo://" + localIP + "/com.foo.BarService"
 	dubboURL, _ := common.NewURL(urlString)
@@ -255,7 +285,7 @@ func TestRoute_ReturnAll(t *testing.T) {
 	inv := &invocation.RPCInvocation{}
 	rule := base64.URLEncoding.EncodeToString([]byte("host = " + localIP + " => " + " host = " + localIP))
 	curl, _ := common.NewURL(fmt.Sprintf(factoryConsumerFormat, localIP))
-	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule))
+	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule), notify)
 	ret := r.Route(utils.ToBitmap(invokers), setUpAddrCache(invokers), curl, inv)
 	assert.Equal(t, len(invokers), len(ret.ToArray()))
 }
@@ -265,6 +295,11 @@ func TestRoute_HostFilter(t *testing.T) {
 	url1, _ := common.NewURL(factory333URL)
 	url2, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
 	url3, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
 	invoker1 := NewMockInvoker(url1, 1)
 	invoker2 := NewMockInvoker(url2, 2)
 	invoker3 := NewMockInvoker(url3, 3)
@@ -272,7 +307,7 @@ func TestRoute_HostFilter(t *testing.T) {
 	inv := &invocation.RPCInvocation{}
 	rule := base64.URLEncoding.EncodeToString([]byte("host = " + localIP + " => " + " host = " + localIP))
 	curl, _ := common.NewURL(fmt.Sprintf(factoryConsumerFormat, localIP))
-	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule))
+	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule), notify)
 	ret := r.Route(utils.ToBitmap(invokers), setUpAddrCache(invokers), curl, inv)
 	assert.Equal(t, 2, len(ret.ToArray()))
 	assert.Equal(t, invoker2, invokers[ret.ToArray()[0]])
@@ -280,6 +315,11 @@ func TestRoute_HostFilter(t *testing.T) {
 }
 
 func TestRoute_Empty_HostFilter(t *testing.T) {
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
 	localIP := common.GetLocalIp()
 	url1, _ := common.NewURL(factory333URL)
 	url2, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
@@ -291,7 +331,7 @@ func TestRoute_Empty_HostFilter(t *testing.T) {
 	inv := &invocation.RPCInvocation{}
 	rule := base64.URLEncoding.EncodeToString([]byte(" => " + " host = " + localIP))
 	curl, _ := common.NewURL(fmt.Sprintf(factoryConsumerFormat, localIP))
-	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule))
+	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule), notify)
 	ret := r.Route(utils.ToBitmap(invokers), setUpAddrCache(invokers), curl, inv)
 	assert.Equal(t, 2, len(ret.ToArray()))
 	assert.Equal(t, invoker2, invokers[ret.ToArray()[0]])
@@ -299,6 +339,11 @@ func TestRoute_Empty_HostFilter(t *testing.T) {
 }
 
 func TestRoute_False_HostFilter(t *testing.T) {
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
 	localIP := common.GetLocalIp()
 	url1, _ := common.NewURL(factory333URL)
 	url2, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
@@ -310,7 +355,7 @@ func TestRoute_False_HostFilter(t *testing.T) {
 	inv := &invocation.RPCInvocation{}
 	rule := base64.URLEncoding.EncodeToString([]byte("true => " + " host = " + localIP))
 	curl, _ := common.NewURL(fmt.Sprintf(factoryConsumerFormat, localIP))
-	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule))
+	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule), notify)
 	ret := r.Route(utils.ToBitmap(invokers), setUpAddrCache(invokers), curl, inv)
 	assert.Equal(t, 2, len(ret.ToArray()))
 	assert.Equal(t, invoker2, invokers[ret.ToArray()[0]])
@@ -318,6 +363,11 @@ func TestRoute_False_HostFilter(t *testing.T) {
 }
 
 func TestRoute_Placeholder(t *testing.T) {
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
 	localIP := common.GetLocalIp()
 	url1, _ := common.NewURL(factory333URL)
 	url2, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
@@ -329,7 +379,7 @@ func TestRoute_Placeholder(t *testing.T) {
 	inv := &invocation.RPCInvocation{}
 	rule := base64.URLEncoding.EncodeToString([]byte("host = " + localIP + " => " + " host = $host"))
 	curl, _ := common.NewURL(fmt.Sprintf(factoryConsumerFormat, localIP))
-	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule))
+	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrl(rule), notify)
 	ret := r.Route(utils.ToBitmap(invokers), setUpAddrCache(invokers), curl, inv)
 	assert.Equal(t, 2, len(ret.ToArray()))
 	assert.Equal(t, invoker2, invokers[ret.ToArray()[0]])
@@ -337,6 +387,11 @@ func TestRoute_Placeholder(t *testing.T) {
 }
 
 func TestRoute_NoForce(t *testing.T) {
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
 	localIP := common.GetLocalIp()
 	url1, _ := common.NewURL(factory333URL)
 	url2, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
@@ -348,12 +403,17 @@ func TestRoute_NoForce(t *testing.T) {
 	inv := &invocation.RPCInvocation{}
 	rule := base64.URLEncoding.EncodeToString([]byte(fmt.Sprintf(factoryHostIp1234Format, localIP)))
 	curl, _ := common.NewURL(fmt.Sprintf(factoryConsumerFormat, localIP))
-	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrlWithNoForce(rule))
+	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrlWithNoForce(rule), notify)
 	ret := r.Route(utils.ToBitmap(invokers), setUpAddrCache(invokers), curl, inv)
 	assert.Equal(t, len(invokers), len(ret.ToArray()))
 }
 
 func TestRoute_Force(t *testing.T) {
+	notify := make(chan struct{})
+	go func() {
+		for range notify {
+		}
+	}()
 	localIP := common.GetLocalIp()
 	url1, _ := common.NewURL(factory333URL)
 	url2, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
@@ -365,7 +425,7 @@ func TestRoute_Force(t *testing.T) {
 	inv := &invocation.RPCInvocation{}
 	rule := base64.URLEncoding.EncodeToString([]byte(fmt.Sprintf(factoryHostIp1234Format, localIP)))
 	curl, _ := common.NewURL(fmt.Sprintf(factoryConsumerFormat, localIP))
-	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrlWithForce(rule, "true"))
+	r, _ := newConditionRouterFactory().NewPriorityRouter(getRouteUrlWithForce(rule, "true"), notify)
 	fileredInvokers := r.Route(utils.ToBitmap(invokers), setUpAddrCache(invokers), curl, inv)
 	assert.Equal(t, 0, len(fileredInvokers.ToArray()))
 }

cluster/router/condition/listenable_router.go

@@ -47,8 +47,9 @@ type listenableRouter struct {
 	conditionRouters []*ConditionRouter
 	routerRule       *RouterRule
 	url              *common.URL
-	//force            bool
-	priority int64
+	force            bool
+	priority         int64
+	notify           chan struct{}
 }
 
 // RouterRule Get RouterRule instance from listenableRouter
@@ -56,7 +57,7 @@ func (l *listenableRouter) RouterRule() *RouterRule {
 	return l.routerRule
 }
 
-func newListenableRouter(url *common.URL, ruleKey string) (*AppRouter, error) {
+func newListenableRouter(url *common.URL, ruleKey string, notify chan struct{}) (*AppRouter, error) {
 	if ruleKey == "" {
 		return nil, perrors.Errorf("NewListenableRouter ruleKey is nil, can't create Listenable router")
 	}
@@ -64,6 +65,7 @@ func newListenableRouter(url *common.URL, ruleKey string) (*AppRouter, error) {
 
 	l.url = url
 	l.priority = listenableRouterDefaultPriority
+	l.notify = notify
 
 	routerKey := ruleKey + constant.ConditionRouterRuleSuffix
 	// add listener
@@ -110,6 +112,9 @@ func (l *listenableRouter) Process(event *config_center.ConfigChangeEvent) {
 		return
 	}
 	l.generateConditions(routerRule)
+	go func() {
+		l.notify <- struct{}{}
+	}()
 }
 
 func (l *listenableRouter) generateConditions(rule *RouterRule) {