diff --git a/.gitignore b/.gitignore
index 3d70f85a59b1367114bf04a7286fbb020d6825a4..3769d10aa12348464cb315fd336bf6b7234069cc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,3 +23,4 @@ vendor/
 
 logs/
 .vscode/
+coverage.txt
diff --git a/README.md b/README.md
index b64ce4973d6df5efcb560058b857d455e6371a57..593be70222b69f5aa62ac0b781a0a3be6b0e1ff5 100644
--- a/README.md
+++ b/README.md
@@ -31,15 +31,16 @@ Finished List:
 - Codec: JsonRPC v2, Hessian v2
 - Registry: ZooKeeper
 - Configure Center: Zookeeper
-- Cluster Strategy: Failover
-- Load Balance: Random, RoundRobin, LeastActive
+- Cluster Strategy: Failover/[Failfast](https://github.com/apache/dubbo-go/pull/140)/[Failsafe/Failback](https://github.com/apache/dubbo-go/pull/136)/Available/Broadcast
+- Load Balance: Random/[RoundRobin](https://github.com/apache/dubbo-go/pull/66)/[LeastActive](https://github.com/apache/dubbo-go/pull/65)
 - Filter: Echo Health Check
+- Other feature: [generic invoke](https://github.com/apache/dubbo-go/pull/122)/start check/connecting certain provider/multi-protocols/multi-registries/multi-versions/service group
 
 Working List:
 
-- Cluster Strategy: Failfast/Failsafe/Failback/Forking
+- Cluster Strategy: Forking
 - Load Balance: ConsistentHash
-- Filter: TokenFilter/AccessLogFilter/CountFilter/ActiveLimitFilter/ExecuteLimitFilter/GenericFilter/TpsLimitFilter
+- Filter: TokenFilter/AccessLogFilter/CountFilter/ExecuteLimitFilter/TpsLimitFilter
 - Registry: etcd/k8s/consul/nacos
 - Configure Center: apollo
 - Dynamic Configuration Center & Metadata Center (dubbo v2.7.x)
@@ -55,7 +56,7 @@ You can know more about dubbo-go by its [roadmap](https://github.com/apache/dubb
 
 ## Document
 
-Move [here](https://dubbogo.github.io/dubbo-go-website/)
+TODO
 
 ## Quick Start
 
diff --git a/README_CN.md b/README_CN.md
index 0553527534506f21eb9bd154c034b8345298f93c..7732a655adfbaa2a2a963201d6580767758c4fce 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -26,29 +26,29 @@ Apache License, Version 2.0
 
 瀹炵幇鍒楄〃:
 
-- Role: Consumer, Provider
-- Transport: HTTP, TCP
-- Codec: JsonRPC v2, Hessian v2
-- Registry: ZooKeeper
-- Routing: Rule(dubbo v2.6.x)
-- Configure Center: Zookeeper
-- Cluster Strategy: Failover
-- Load Balance: Random, RoundRobin, LeastActive
-- Filter: Echo Health Check
+- 瑙掕壊绔�: Consumer, Provider
+- 浼犺緭鍗忚: HTTP, TCP
+- 搴忓垪鍖栧崗璁�: JsonRPC v2, Hessian v2
+- 娉ㄥ唽涓績: ZooKeeper
+- 閰嶇疆涓績: Zookeeper
+- 闆嗙兢绛栫暐: Failover/[Failfast](https://github.com/apache/dubbo-go/pull/140)/[Failsafe/Failback](https://github.com/apache/dubbo-go/pull/136)/Available/Broadcast
+- 璐熻浇鍧囪　绛栫暐: Random/[RoundRobin](https://github.com/apache/dubbo-go/pull/66)/[LeastActive](https://github.com/apache/dubbo-go/pull/65)
+- 杩囨护鍣�: Echo Health Check
+- 鍏朵粬鍔熻兘鏀寔: [娉涘寲璋冪敤](https://github.com/apache/dubbo-go/pull/122)/鍚姩鏃舵鏌�/鏈嶅姟鐩磋繛/澶氭湇鍔″崗璁�/澶氭敞鍐屼腑蹇�/澶氭湇鍔＄増鏈�/鏈嶅姟鍒嗙粍
 
 寮€鍙戜腑鍒楄〃:
 
-- Cluster Strategy: Failfast/Failsafe/Failback/Forking
-- Load Balance: ConsistentHash
-- Filter: TokenFilter/AccessLogFilter/CountFilter/ActiveLimitFilter/ExecuteLimitFilter/GenericFilter/TpsLimitFilter
-- Registry: etcd/k8s/consul/nacos
-- Configure Center: apollo
-- Dynamic Configuration Center & Metadata Center (dubbo v2.7.x)
+- 闆嗙兢绛栫暐: Forking
+- 璐熻浇鍧囪　绛栫暐: ConsistentHash
+- 杩囨护鍣�: TokenFilter/AccessLogFilter/CountFilter/ExecuteLimitFilter/TpsLimitFilter
+- 娉ㄥ唽涓績: etcd/k8s/consul/nacos
+- 閰嶇疆涓績: apollo
+- 鍔ㄦ€侀厤缃腑蹇� & 鍏冩暟鎹腑蹇� (dubbo v2.7.x)
 - Metrics: Promethus(dubbo v2.7.x)
 
 浠诲姟鍒楄〃:
 
-- Registry: kubernetes
+- 娉ㄥ唽涓績: kubernetes
 - Routing: istio
 - tracing (dubbo ecosystem)
 
@@ -56,7 +56,7 @@ Apache License, Version 2.0
 
 ## 鏂囨。
 
-绉绘[杩欓噷](https://dubbogo.github.io/dubbo-go-website/)
+TODO
 
 ## 蹇€熷紑濮� ##
 
diff --git a/cluster/cluster_impl/available_cluster.go b/cluster/cluster_impl/available_cluster.go
new file mode 100644
index 0000000000000000000000000000000000000000..7e748cd938319ff437bb3fb6c7945b857d316069
--- /dev/null
+++ b/cluster/cluster_impl/available_cluster.go
@@ -0,0 +1,40 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cluster_impl
+
+import (
+	"github.com/apache/dubbo-go/cluster"
+	"github.com/apache/dubbo-go/common/extension"
+	"github.com/apache/dubbo-go/protocol"
+)
+
+type availableCluster struct{}
+
+const available = "available"
+
+func init() {
+	extension.SetCluster(available, NewAvailableCluster)
+}
+
+func NewAvailableCluster() cluster.Cluster {
+	return &availableCluster{}
+}
+
+func (cluser *availableCluster) Join(directory cluster.Directory) protocol.Invoker {
+	return NewAvailableClusterInvoker(directory)
+}
diff --git a/cluster/cluster_impl/available_cluster_invoker.go b/cluster/cluster_impl/available_cluster_invoker.go
new file mode 100644
index 0000000000000000000000000000000000000000..c59c0702c216fe5c58d190a023322aaa00ac9c17
--- /dev/null
+++ b/cluster/cluster_impl/available_cluster_invoker.go
@@ -0,0 +1,61 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cluster_impl
+
+import (
+	"fmt"
+)
+
+import (
+	"github.com/pkg/errors"
+)
+
+import (
+	"github.com/apache/dubbo-go/cluster"
+	"github.com/apache/dubbo-go/protocol"
+)
+
+type availableClusterInvoker struct {
+	baseClusterInvoker
+}
+
+func NewAvailableClusterInvoker(directory cluster.Directory) protocol.Invoker {
+	return &availableClusterInvoker{
+		baseClusterInvoker: newBaseClusterInvoker(directory),
+	}
+}
+
+func (invoker *availableClusterInvoker) Invoke(invocation protocol.Invocation) protocol.Result {
+	invokers := invoker.directory.List(invocation)
+	err := invoker.checkInvokers(invokers, invocation)
+	if err != nil {
+		return &protocol.RPCResult{Err: err}
+	}
+
+	err = invoker.checkWhetherDestroyed()
+	if err != nil {
+		return &protocol.RPCResult{Err: err}
+	}
+
+	for _, ivk := range invokers {
+		if ivk.IsAvailable() {
+			return ivk.Invoke(invocation)
+		}
+	}
+	return &protocol.RPCResult{Err: errors.New(fmt.Sprintf("no provider available in %v", invokers))}
+}
diff --git a/cluster/cluster_impl/available_cluster_invoker_test.go b/cluster/cluster_impl/available_cluster_invoker_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..04032a7f24dec0e73acb15921f753921391f1515
--- /dev/null
+++ b/cluster/cluster_impl/available_cluster_invoker_test.go
@@ -0,0 +1,88 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cluster_impl
+
+import (
+	"context"
+	"strings"
+	"testing"
+)
+
+import (
+	"github.com/golang/mock/gomock"
+	"github.com/stretchr/testify/assert"
+)
+
+import (
+	"github.com/apache/dubbo-go/cluster/directory"
+	"github.com/apache/dubbo-go/cluster/loadbalance"
+	"github.com/apache/dubbo-go/common"
+	"github.com/apache/dubbo-go/common/extension"
+	"github.com/apache/dubbo-go/protocol"
+	"github.com/apache/dubbo-go/protocol/invocation"
+	"github.com/apache/dubbo-go/protocol/mock"
+)
+
+var (
+	availableUrl, _ = common.NewURL(context.Background(), "dubbo://192.168.1.1:20000/com.ikurento.user.UserProvider")
+)
+
+func registerAvailable(t *testing.T, invoker *mock.MockInvoker) protocol.Invoker {
+	extension.SetLoadbalance("random", loadbalance.NewRandomLoadBalance)
+	availableCluster := NewAvailableCluster()
+
+	invokers := []protocol.Invoker{}
+	invokers = append(invokers, invoker)
+	invoker.EXPECT().GetUrl().Return(availableUrl)
+
+	staticDir := directory.NewStaticDirectory(invokers)
+	clusterInvoker := availableCluster.Join(staticDir)
+	return clusterInvoker
+}
+
+func TestAvailableClusterInvokerSuccess(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	invoker := mock.NewMockInvoker(ctrl)
+	clusterInvoker := registerAvailable(t, invoker)
+
+	mockResult := &protocol.RPCResult{Rest: rest{tried: 0, success: true}}
+	invoker.EXPECT().IsAvailable().Return(true)
+	invoker.EXPECT().Invoke(gomock.Any()).Return(mockResult)
+
+	result := clusterInvoker.Invoke(&invocation.RPCInvocation{})
+
+	assert.Equal(t, mockResult, result)
+}
+
+func TestAvailableClusterInvokerNoAvail(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	invoker := mock.NewMockInvoker(ctrl)
+	clusterInvoker := registerAvailable(t, invoker)
+
+	invoker.EXPECT().IsAvailable().Return(false)
+
+	result := clusterInvoker.Invoke(&invocation.RPCInvocation{})
+
+	assert.NotNil(t, result.Error())
+	assert.True(t, strings.Contains(result.Error().Error(), "no provider available"))
+	assert.Nil(t, result.Result())
+}
diff --git a/cluster/cluster_impl/base_cluster_invoker.go b/cluster/cluster_impl/base_cluster_invoker.go
index 6cbed7748e496afb37f9a1e93dbc40e845c62b06..2426258b95e8a2ecf5067b2ed469eeb9a5617f18 100644
--- a/cluster/cluster_impl/base_cluster_invoker.go
+++ b/cluster/cluster_impl/base_cluster_invoker.go
@@ -25,6 +25,8 @@ import (
 import (
 	"github.com/apache/dubbo-go/cluster"
 	"github.com/apache/dubbo-go/common"
+	"github.com/apache/dubbo-go/common/constant"
+	"github.com/apache/dubbo-go/common/extension"
 	"github.com/apache/dubbo-go/common/utils"
 	"github.com/apache/dubbo-go/protocol"
 	"github.com/apache/dubbo-go/version"
@@ -115,12 +117,24 @@ func (invoker *baseClusterInvoker) doSelect(lb cluster.LoadBalance, invocation p
 }
 
 func isInvoked(selectedInvoker protocol.Invoker, invoked []protocol.Invoker) bool {
-	if len(invoked) > 0 {
-		for _, i := range invoked {
-			if i == selectedInvoker {
-				return true
-			}
+	for _, i := range invoked {
+		if i == selectedInvoker {
+			return true
 		}
 	}
 	return false
 }
+
+func getLoadBalance(invoker protocol.Invoker, invocation protocol.Invocation) cluster.LoadBalance {
+	url := invoker.GetUrl()
+
+	methodName := invocation.MethodName()
+	//Get the service loadbalance config
+	lb := url.GetParam(constant.LOADBALANCE_KEY, constant.DEFAULT_LOADBALANCE)
+
+	//Get the service method loadbalance config if have
+	if v := url.GetMethodParam(methodName, constant.LOADBALANCE_KEY, ""); len(v) > 0 {
+		lb = v
+	}
+	return extension.GetLoadbalance(lb)
+}
diff --git a/cluster/cluster_impl/broadcast_cluster.go b/cluster/cluster_impl/broadcast_cluster.go
new file mode 100644
index 0000000000000000000000000000000000000000..50aae3cfab8d67570b50dcab4e53bbfad29d6d30
--- /dev/null
+++ b/cluster/cluster_impl/broadcast_cluster.go
@@ -0,0 +1,40 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cluster_impl
+
+import (
+	"github.com/apache/dubbo-go/cluster"
+	"github.com/apache/dubbo-go/common/extension"
+	"github.com/apache/dubbo-go/protocol"
+)
+
+type broadcastCluster struct{}
+
+const broadcast = "broadcast"
+
+func init() {
+	extension.SetCluster(broadcast, NewBroadcastCluster)
+}
+
+func NewBroadcastCluster() cluster.Cluster {
+	return &broadcastCluster{}
+}
+
+func (cluster *broadcastCluster) Join(directory cluster.Directory) protocol.Invoker {
+	return newBroadcastClusterInvoker(directory)
+}
diff --git a/cluster/cluster_impl/broadcast_cluster_invoker.go b/cluster/cluster_impl/broadcast_cluster_invoker.go
new file mode 100644
index 0000000000000000000000000000000000000000..238df0acfa7fb946e38bfbfd490bce7c0bb34e60
--- /dev/null
+++ b/cluster/cluster_impl/broadcast_cluster_invoker.go
@@ -0,0 +1,59 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cluster_impl
+
+import (
+	"github.com/apache/dubbo-go/cluster"
+	"github.com/apache/dubbo-go/common/logger"
+	"github.com/apache/dubbo-go/protocol"
+)
+
+type broadcastClusterInvoker struct {
+	baseClusterInvoker
+}
+
+func newBroadcastClusterInvoker(directory cluster.Directory) protocol.Invoker {
+	return &broadcastClusterInvoker{
+		baseClusterInvoker: newBaseClusterInvoker(directory),
+	}
+}
+
+func (invoker *broadcastClusterInvoker) Invoke(invocation protocol.Invocation) protocol.Result {
+	invokers := invoker.directory.List(invocation)
+	err := invoker.checkInvokers(invokers, invocation)
+	if err != nil {
+		return &protocol.RPCResult{Err: err}
+	}
+	err = invoker.checkWhetherDestroyed()
+	if err != nil {
+		return &protocol.RPCResult{Err: err}
+	}
+
+	var result protocol.Result
+	for _, ivk := range invokers {
+		result = ivk.Invoke(invocation)
+		if result.Error() != nil {
+			logger.Warnf("broadcast invoker invoke err: %v when use invoker: %v\n", result.Error(), ivk)
+			err = result.Error()
+		}
+	}
+	if err != nil {
+		return &protocol.RPCResult{Err: err}
+	}
+	return result
+}
diff --git a/cluster/cluster_impl/broadcast_cluster_invoker_test.go b/cluster/cluster_impl/broadcast_cluster_invoker_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..565684a8ae25c648ff77aef71d2ced0665202fe7
--- /dev/null
+++ b/cluster/cluster_impl/broadcast_cluster_invoker_test.go
@@ -0,0 +1,109 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cluster_impl
+
+import (
+	"context"
+	"errors"
+	"testing"
+)
+
+import (
+	"github.com/golang/mock/gomock"
+	"github.com/stretchr/testify/assert"
+)
+
+import (
+	"github.com/apache/dubbo-go/cluster/directory"
+	"github.com/apache/dubbo-go/cluster/loadbalance"
+	"github.com/apache/dubbo-go/common"
+	"github.com/apache/dubbo-go/common/extension"
+	"github.com/apache/dubbo-go/protocol"
+	"github.com/apache/dubbo-go/protocol/invocation"
+	"github.com/apache/dubbo-go/protocol/mock"
+)
+
+var (
+	broadcastUrl, _ = common.NewURL(context.TODO(), "dubbo://192.168.1.1:20000/com.ikurento.user.UserProvider")
+)
+
+func registerBroadcast(t *testing.T, mockInvokers ...*mock.MockInvoker) protocol.Invoker {
+	extension.SetLoadbalance("random", loadbalance.NewRandomLoadBalance)
+
+	invokers := []protocol.Invoker{}
+	for i, ivk := range mockInvokers {
+		invokers = append(invokers, ivk)
+		if i == 0 {
+			ivk.EXPECT().GetUrl().Return(broadcastUrl)
+		}
+	}
+	staticDir := directory.NewStaticDirectory(invokers)
+
+	broadcastCluster := NewBroadcastCluster()
+	clusterInvoker := broadcastCluster.Join(staticDir)
+	return clusterInvoker
+}
+
+func Test_BroadcastInvokeSuccess(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	invokers := make([]*mock.MockInvoker, 0)
+
+	mockResult := &protocol.RPCResult{Rest: rest{tried: 0, success: true}}
+	for i := 0; i < 3; i++ {
+		invoker := mock.NewMockInvoker(ctrl)
+		invokers = append(invokers, invoker)
+		invoker.EXPECT().Invoke(gomock.Any()).Return(mockResult)
+	}
+
+	clusterInvoker := registerBroadcast(t, invokers...)
+
+	result := clusterInvoker.Invoke(&invocation.RPCInvocation{})
+	assert.Equal(t, mockResult, result)
+}
+
+func Test_BroadcastInvokeFailed(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	invokers := make([]*mock.MockInvoker, 0)
+
+	mockResult := &protocol.RPCResult{Rest: rest{tried: 0, success: true}}
+	mockFailedResult := &protocol.RPCResult{Err: errors.New("just failed")}
+	for i := 0; i < 10; i++ {
+		invoker := mock.NewMockInvoker(ctrl)
+		invokers = append(invokers, invoker)
+		invoker.EXPECT().Invoke(gomock.Any()).Return(mockResult)
+	}
+	{
+		invoker := mock.NewMockInvoker(ctrl)
+		invokers = append(invokers, invoker)
+		invoker.EXPECT().Invoke(gomock.Any()).Return(mockFailedResult)
+	}
+	for i := 0; i < 10; i++ {
+		invoker := mock.NewMockInvoker(ctrl)
+		invokers = append(invokers, invoker)
+		invoker.EXPECT().Invoke(gomock.Any()).Return(mockResult)
+	}
+
+	clusterInvoker := registerBroadcast(t, invokers...)
+
+	result := clusterInvoker.Invoke(&invocation.RPCInvocation{})
+	assert.Equal(t, mockFailedResult.Err, result.Error())
+}
diff --git a/cluster/cluster_impl/failback_cluster.go b/cluster/cluster_impl/failback_cluster.go
new file mode 100644
index 0000000000000000000000000000000000000000..de22c78e947d0b8124add721ab7ff42efebcdbe4
--- /dev/null
+++ b/cluster/cluster_impl/failback_cluster.go
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cluster_impl
+
+import (
+	"github.com/apache/dubbo-go/cluster"
+	"github.com/apache/dubbo-go/common/extension"
+	"github.com/apache/dubbo-go/protocol"
+)
+
+type failbackCluster struct{}
+
+const failback = "failback"
+
+func init() {
+	extension.SetCluster(failback, NewFailbackCluster)
+}
+
+func NewFailbackCluster() cluster.Cluster {
+	return &failbackCluster{}
+}
+
+func (cluster *failbackCluster) Join(directory cluster.Directory) protocol.Invoker {
+	return newFailbackClusterInvoker(directory)
+}
diff --git a/cluster/cluster_impl/failback_cluster_invoker.go b/cluster/cluster_impl/failback_cluster_invoker.go
new file mode 100644
index 0000000000000000000000000000000000000000..027461ccb7f32d6383d756ac986295b6300f249c
--- /dev/null
+++ b/cluster/cluster_impl/failback_cluster_invoker.go
@@ -0,0 +1,203 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cluster_impl
+
+import (
+	"sync"
+	"time"
+)
+
+import (
+	"github.com/Workiva/go-datastructures/queue"
+)
+
+import (
+	"github.com/apache/dubbo-go/cluster"
+	"github.com/apache/dubbo-go/common/constant"
+	"github.com/apache/dubbo-go/common/extension"
+	"github.com/apache/dubbo-go/common/logger"
+	"github.com/apache/dubbo-go/protocol"
+)
+
+/**
+ * When fails, record failure requests and schedule for retry on a regular interval.
+ * Especially useful for services of notification.
+ *
+ * <a href="http://en.wikipedia.org/wiki/Failback">Failback</a>
+ */
+type failbackClusterInvoker struct {
+	baseClusterInvoker
+
+	once          sync.Once
+	ticker        *time.Ticker
+	maxRetries    int64
+	failbackTasks int64
+	taskList      *queue.Queue
+}
+
+func newFailbackClusterInvoker(directory cluster.Directory) protocol.Invoker {
+	invoker := &failbackClusterInvoker{
+		baseClusterInvoker: newBaseClusterInvoker(directory),
+	}
+	retriesConfig := invoker.GetUrl().GetParamInt(constant.RETRIES_KEY, constant.DEFAULT_FAILBACK_TIMES)
+	if retriesConfig <= 0 {
+		retriesConfig = constant.DEFAULT_FAILBACK_TIMES
+	}
+	failbackTasksConfig := invoker.GetUrl().GetParamInt(constant.FAIL_BACK_TASKS_KEY, constant.DEFAULT_FAILBACK_TASKS)
+	if failbackTasksConfig <= 0 {
+		failbackTasksConfig = constant.DEFAULT_FAILBACK_TASKS
+	}
+	invoker.maxRetries = retriesConfig
+	invoker.failbackTasks = failbackTasksConfig
+	return invoker
+}
+
+func (invoker *failbackClusterInvoker) process() {
+	invoker.ticker = time.NewTicker(time.Second * 1)
+	for range invoker.ticker.C {
+		// check each timeout task and re-run
+		for {
+			value, err := invoker.taskList.Peek()
+			if err == queue.ErrDisposed {
+				return
+			}
+			if err == queue.ErrEmptyQueue {
+				break
+			}
+
+			retryTask := value.(*retryTimerTask)
+			if time.Since(retryTask.lastT).Seconds() < 5 {
+				break
+			}
+
+			// ignore return. the get must success.
+			_, err = invoker.taskList.Get(1)
+			if err != nil {
+				logger.Warnf("get task found err: %v\n", err)
+				break
+			}
+
+			go func(retryTask *retryTimerTask) {
+				invoked := make([]protocol.Invoker, 0)
+				invoked = append(invoked, retryTask.lastInvoker)
+
+				retryInvoker := invoker.doSelect(retryTask.loadbalance, retryTask.invocation, retryTask.invokers, invoked)
+				var result protocol.Result
+				result = retryInvoker.Invoke(retryTask.invocation)
+				if result.Error() != nil {
+					retryTask.lastInvoker = retryInvoker
+					invoker.checkRetry(retryTask, result.Error())
+				}
+			}(retryTask)
+
+		}
+	}
+}
+
+func (invoker *failbackClusterInvoker) checkRetry(retryTask *retryTimerTask, err error) {
+	logger.Errorf("Failed retry to invoke the method %v in the service %v, wait again. The exception: %v.\n",
+		retryTask.invocation.MethodName(), invoker.GetUrl().Service(), err.Error())
+	retryTask.retries++
+	retryTask.lastT = time.Now()
+	if retryTask.retries > invoker.maxRetries {
+		logger.Errorf("Failed retry times exceed threshold (%v), We have to abandon, invocation-> %v.\n",
+			retryTask.retries, retryTask.invocation)
+	} else {
+		invoker.taskList.Put(retryTask)
+	}
+}
+
+func (invoker *failbackClusterInvoker) Invoke(invocation protocol.Invocation) protocol.Result {
+	invokers := invoker.directory.List(invocation)
+	err := invoker.checkInvokers(invokers, invocation)
+	if err != nil {
+		logger.Errorf("Failed to invoke the method %v in the service %v, wait for retry in background. Ignored exception: %v.\n",
+			invocation.MethodName(), invoker.GetUrl().Service(), err)
+		return &protocol.RPCResult{}
+	}
+	url := invokers[0].GetUrl()
+	methodName := invocation.MethodName()
+	//Get the service loadbalance config
+	lb := url.GetParam(constant.LOADBALANCE_KEY, constant.DEFAULT_LOADBALANCE)
+
+	//Get the service method loadbalance config if have
+	if v := url.GetMethodParam(methodName, constant.LOADBALANCE_KEY, ""); v != "" {
+		lb = v
+	}
+	loadbalance := extension.GetLoadbalance(lb)
+
+	invoked := make([]protocol.Invoker, 0, len(invokers))
+	var result protocol.Result
+
+	ivk := invoker.doSelect(loadbalance, invocation, invokers, invoked)
+	//DO INVOKE
+	result = ivk.Invoke(invocation)
+	if result.Error() != nil {
+		invoker.once.Do(func() {
+			invoker.taskList = queue.New(invoker.failbackTasks)
+			go invoker.process()
+		})
+
+		taskLen := invoker.taskList.Len()
+		if taskLen >= invoker.failbackTasks {
+			logger.Warnf("tasklist is too full > %d.\n", taskLen)
+			return &protocol.RPCResult{}
+		}
+
+		timerTask := newRetryTimerTask(loadbalance, invocation, invokers, ivk)
+		invoker.taskList.Put(timerTask)
+
+		logger.Errorf("Failback to invoke the method %v in the service %v, wait for retry in background. Ignored exception: %v.\n",
+			methodName, url.Service(), result.Error().Error())
+		// ignore
+		return &protocol.RPCResult{}
+	}
+
+	return result
+}
+
+func (invoker *failbackClusterInvoker) Destroy() {
+	invoker.baseClusterInvoker.Destroy()
+
+	// stop ticker
+	if invoker.ticker != nil {
+		invoker.ticker.Stop()
+	}
+
+	_ = invoker.taskList.Dispose()
+}
+
+type retryTimerTask struct {
+	loadbalance cluster.LoadBalance
+	invocation  protocol.Invocation
+	invokers    []protocol.Invoker
+	lastInvoker protocol.Invoker
+	retries     int64
+	lastT       time.Time
+}
+
+func newRetryTimerTask(loadbalance cluster.LoadBalance, invocation protocol.Invocation, invokers []protocol.Invoker,
+	lastInvoker protocol.Invoker) *retryTimerTask {
+	return &retryTimerTask{
+		loadbalance: loadbalance,
+		invocation:  invocation,
+		invokers:    invokers,
+		lastInvoker: lastInvoker,
+		lastT:       time.Now(),
+	}
+}
diff --git a/cluster/cluster_impl/failback_cluster_test.go b/cluster/cluster_impl/failback_cluster_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..c94347a1251a69a10c0a4d50007ef569bd6dd996
--- /dev/null
+++ b/cluster/cluster_impl/failback_cluster_test.go
@@ -0,0 +1,242 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cluster_impl
+
+import (
+	"context"
+	"sync"
+	"testing"
+	"time"
+)
+
+import (
+	"github.com/golang/mock/gomock"
+	perrors "github.com/pkg/errors"
+	"github.com/stretchr/testify/assert"
+)
+
+import (
+	"github.com/apache/dubbo-go/cluster/directory"
+	"github.com/apache/dubbo-go/cluster/loadbalance"
+	"github.com/apache/dubbo-go/common"
+	"github.com/apache/dubbo-go/common/extension"
+	"github.com/apache/dubbo-go/protocol"
+	"github.com/apache/dubbo-go/protocol/invocation"
+	"github.com/apache/dubbo-go/protocol/mock"
+)
+
+var (
+	failbackUrl, _ = common.NewURL(context.TODO(), "dubbo://192.168.1.1:20000/com.ikurento.user.UserProvider")
+)
+
+// registerFailback register failbackCluster to cluster extension.
+func registerFailback(t *testing.T, invoker *mock.MockInvoker) protocol.Invoker {
+	extension.SetLoadbalance("random", loadbalance.NewRandomLoadBalance)
+	failbackCluster := NewFailbackCluster()
+
+	invokers := []protocol.Invoker{}
+	invokers = append(invokers, invoker)
+
+	invoker.EXPECT().GetUrl().Return(failbackUrl)
+
+	staticDir := directory.NewStaticDirectory(invokers)
+	clusterInvoker := failbackCluster.Join(staticDir)
+	return clusterInvoker
+}
+
+// success firstly, failback should return origin invoke result.
+func Test_FailbackSuceess(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	invoker := mock.NewMockInvoker(ctrl)
+	clusterInvoker := registerFailback(t, invoker).(*failbackClusterInvoker)
+
+	invoker.EXPECT().GetUrl().Return(failbackUrl).Times(1)
+
+	mockResult := &protocol.RPCResult{Rest: rest{tried: 0, success: true}}
+	invoker.EXPECT().Invoke(gomock.Any()).Return(mockResult)
+
+	result := clusterInvoker.Invoke(&invocation.RPCInvocation{})
+	assert.Equal(t, mockResult, result)
+}
+
+// failed firstly, success later after one retry.
+func Test_FailbackRetryOneSuccess(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	invoker := mock.NewMockInvoker(ctrl)
+	clusterInvoker := registerFailback(t, invoker).(*failbackClusterInvoker)
+
+	invoker.EXPECT().GetUrl().Return(failbackUrl).AnyTimes()
+
+	// failed at first
+	mockFailedResult := &protocol.RPCResult{Err: perrors.New("error")}
+	invoker.EXPECT().Invoke(gomock.Any()).Return(mockFailedResult)
+
+	// success second
+	var wg sync.WaitGroup
+	wg.Add(1)
+	now := time.Now()
+	mockSuccResult := &protocol.RPCResult{Rest: rest{tried: 0, success: true}}
+	invoker.EXPECT().Invoke(gomock.Any()).DoAndReturn(func(invocation protocol.Invocation) protocol.Result {
+		delta := time.Since(now).Nanoseconds() / int64(time.Second)
+		assert.True(t, delta >= 5)
+		wg.Done()
+		return mockSuccResult
+	})
+
+	result := clusterInvoker.Invoke(&invocation.RPCInvocation{})
+	assert.Nil(t, result.Error())
+	assert.Nil(t, result.Result())
+	assert.Equal(t, 0, len(result.Attachments()))
+
+	// ensure the retry task has been executed
+	assert.Equal(t, int64(1), clusterInvoker.taskList.Len())
+	// wait until the retry task is executed, the taskList will be empty.
+	wg.Wait()
+	assert.Equal(t, int64(0), clusterInvoker.taskList.Len())
+
+	invoker.EXPECT().Destroy().Return()
+	clusterInvoker.Destroy()
+
+	assert.Equal(t, int64(0), clusterInvoker.taskList.Len())
+}
+
+// failed firstly, and failed again after ech retry time.
+func Test_FailbackRetryFailed(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	invoker := mock.NewMockInvoker(ctrl)
+	clusterInvoker := registerFailback(t, invoker).(*failbackClusterInvoker)
+
+	invoker.EXPECT().GetUrl().Return(failbackUrl).AnyTimes()
+
+	mockFailedResult := &protocol.RPCResult{Err: perrors.New("error")}
+	invoker.EXPECT().Invoke(gomock.Any()).Return(mockFailedResult)
+
+	//
+	var wg sync.WaitGroup
+	retries := 2
+	wg.Add(retries)
+	now := time.Now()
+
+	// add retry call that eventually failed.
+	for i := 0; i < retries; i++ {
+		j := i + 1
+		invoker.EXPECT().Invoke(gomock.Any()).DoAndReturn(func(invocation protocol.Invocation) protocol.Result {
+			delta := time.Since(now).Nanoseconds() / int64(time.Second)
+			assert.True(t, delta >= int64(5*j))
+			wg.Done()
+			return mockFailedResult
+		})
+	}
+
+	// first call should failed.
+	result := clusterInvoker.Invoke(&invocation.RPCInvocation{})
+	assert.Nil(t, result.Error())
+	assert.Nil(t, result.Result())
+	assert.Equal(t, 0, len(result.Attachments()))
+
+	wg.Wait()
+	time.Sleep(time.Second)
+	assert.Equal(t, int64(1), clusterInvoker.taskList.Len())
+
+	invoker.EXPECT().Destroy().Return()
+	clusterInvoker.Destroy()
+	// after destroy, the taskList will be empty
+	assert.Equal(t, int64(0), clusterInvoker.taskList.Len())
+}
+
+// add 10 tasks but all failed firstly, and failed again with one retry.
+func Test_FailbackRetryFailed10Times(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	invoker := mock.NewMockInvoker(ctrl)
+	clusterInvoker := registerFailback(t, invoker).(*failbackClusterInvoker)
+	clusterInvoker.maxRetries = 10
+
+	invoker.EXPECT().GetUrl().Return(failbackUrl).AnyTimes()
+
+	// 10 task should failed firstly.
+	mockFailedResult := &protocol.RPCResult{Err: perrors.New("error")}
+	invoker.EXPECT().Invoke(gomock.Any()).Return(mockFailedResult).Times(10)
+
+	// 10 task should retry and failed.
+	var wg sync.WaitGroup
+	wg.Add(10)
+	now := time.Now()
+	invoker.EXPECT().Invoke(gomock.Any()).DoAndReturn(func(invocation protocol.Invocation) protocol.Result {
+		delta := time.Since(now).Nanoseconds() / int64(time.Second)
+		assert.True(t, delta >= 5)
+		wg.Done()
+		return mockFailedResult
+	}).Times(10)
+
+	for i := 0; i < 10; i++ {
+		result := clusterInvoker.Invoke(&invocation.RPCInvocation{})
+		assert.Nil(t, result.Error())
+		assert.Nil(t, result.Result())
+		assert.Equal(t, 0, len(result.Attachments()))
+	}
+
+	wg.Wait()
+	time.Sleep(time.Second) // in order to ensure checkRetry have done
+	assert.Equal(t, int64(10), clusterInvoker.taskList.Len())
+
+	invoker.EXPECT().Destroy().Return()
+	clusterInvoker.Destroy()
+
+	assert.Equal(t, int64(0), clusterInvoker.taskList.Len())
+}
+
+func Test_FailbackOutOfLimit(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	invoker := mock.NewMockInvoker(ctrl)
+	clusterInvoker := registerFailback(t, invoker).(*failbackClusterInvoker)
+	clusterInvoker.failbackTasks = 1
+
+	invoker.EXPECT().GetUrl().Return(failbackUrl).AnyTimes()
+
+	mockFailedResult := &protocol.RPCResult{Err: perrors.New("error")}
+	invoker.EXPECT().Invoke(gomock.Any()).Return(mockFailedResult).Times(11)
+
+	// reached limit
+	result := clusterInvoker.Invoke(&invocation.RPCInvocation{})
+	assert.Nil(t, result.Error())
+	assert.Nil(t, result.Result())
+	assert.Equal(t, 0, len(result.Attachments()))
+
+	// all will be out of limit
+	for i := 0; i < 10; i++ {
+		result := clusterInvoker.Invoke(&invocation.RPCInvocation{})
+		assert.Nil(t, result.Error())
+		assert.Nil(t, result.Result())
+		assert.Equal(t, 0, len(result.Attachments()))
+
+		assert.Equal(t, int64(1), clusterInvoker.taskList.Len())
+	}
+
+	invoker.EXPECT().Destroy().Return()
+	clusterInvoker.Destroy()
+}
diff --git a/cluster/cluster_impl/failfast_cluster.go b/cluster/cluster_impl/failfast_cluster.go
new file mode 100644
index 0000000000000000000000000000000000000000..6301d945626103226132b433dd21e8647f53a38b
--- /dev/null
+++ b/cluster/cluster_impl/failfast_cluster.go
@@ -0,0 +1,40 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cluster_impl
+
+import (
+	"github.com/apache/dubbo-go/cluster"
+	"github.com/apache/dubbo-go/common/extension"
+	"github.com/apache/dubbo-go/protocol"
+)
+
+type failfastCluster struct{}
+
+const failfast = "failfast"
+
+func init() {
+	extension.SetCluster(failfast, NewFailFastCluster)
+}
+
+func NewFailFastCluster() cluster.Cluster {
+	return &failfastCluster{}
+}
+
+func (cluster *failfastCluster) Join(directory cluster.Directory) protocol.Invoker {
+	return newFailFastClusterInvoker(directory)
+}
diff --git a/cluster/cluster_impl/failfast_cluster_invoker.go b/cluster/cluster_impl/failfast_cluster_invoker.go
new file mode 100644
index 0000000000000000000000000000000000000000..734ea2c6cb19bf54a338a76a10c9cfcc59d3954b
--- /dev/null
+++ b/cluster/cluster_impl/failfast_cluster_invoker.go
@@ -0,0 +1,51 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cluster_impl
+
+import (
+	"github.com/apache/dubbo-go/cluster"
+	"github.com/apache/dubbo-go/protocol"
+)
+
+type failfastClusterInvoker struct {
+	baseClusterInvoker
+}
+
+func newFailFastClusterInvoker(directory cluster.Directory) protocol.Invoker {
+	return &failfastClusterInvoker{
+		baseClusterInvoker: newBaseClusterInvoker(directory),
+	}
+}
+
+func (invoker *failfastClusterInvoker) Invoke(invocation protocol.Invocation) protocol.Result {
+	invokers := invoker.directory.List(invocation)
+	err := invoker.checkInvokers(invokers, invocation)
+	if err != nil {
+		return &protocol.RPCResult{Err: err}
+	}
+
+	loadbalance := getLoadBalance(invokers[0], invocation)
+
+	err = invoker.checkWhetherDestroyed()
+	if err != nil {
+		return &protocol.RPCResult{Err: err}
+	}
+
+	ivk := invoker.doSelect(loadbalance, invocation, invokers, nil)
+	return ivk.Invoke(invocation)
+}
diff --git a/cluster/cluster_impl/failfast_cluster_test.go b/cluster/cluster_impl/failfast_cluster_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..7a19e80ccda15aa13a1c4fcf250e05a6effa7f0b
--- /dev/null
+++ b/cluster/cluster_impl/failfast_cluster_test.go
@@ -0,0 +1,97 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cluster_impl
+
+import (
+	"context"
+	"testing"
+)
+
+import (
+	"github.com/golang/mock/gomock"
+	perrors "github.com/pkg/errors"
+	"github.com/stretchr/testify/assert"
+)
+
+import (
+	"github.com/apache/dubbo-go/cluster/directory"
+	"github.com/apache/dubbo-go/cluster/loadbalance"
+	"github.com/apache/dubbo-go/common"
+	"github.com/apache/dubbo-go/common/extension"
+	"github.com/apache/dubbo-go/protocol"
+	"github.com/apache/dubbo-go/protocol/invocation"
+	"github.com/apache/dubbo-go/protocol/mock"
+)
+
+var (
+	failfastUrl, _ = common.NewURL(context.TODO(), "dubbo://192.168.1.1:20000/com.ikurento.user.UserProvider")
+)
+
+// registerFailfast register failfastCluster to cluster extension.
+func registerFailfast(t *testing.T, invoker *mock.MockInvoker) protocol.Invoker {
+	extension.SetLoadbalance("random", loadbalance.NewRandomLoadBalance)
+	failfastCluster := NewFailFastCluster()
+
+	invokers := []protocol.Invoker{}
+	invokers = append(invokers, invoker)
+
+	invoker.EXPECT().GetUrl().Return(failfastUrl)
+
+	staticDir := directory.NewStaticDirectory(invokers)
+	clusterInvoker := failfastCluster.Join(staticDir)
+	return clusterInvoker
+}
+
+func Test_FailfastInvokeSuccess(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	invoker := mock.NewMockInvoker(ctrl)
+	clusterInvoker := registerFailfast(t, invoker)
+
+	invoker.EXPECT().GetUrl().Return(failfastUrl)
+
+	mockResult := &protocol.RPCResult{Rest: rest{tried: 0, success: true}}
+
+	invoker.EXPECT().Invoke(gomock.Any()).Return(mockResult)
+	result := clusterInvoker.Invoke(&invocation.RPCInvocation{})
+
+	assert.NoError(t, result.Error())
+	res := result.Result().(rest)
+	assert.True(t, res.success)
+	assert.Equal(t, 0, res.tried)
+}
+
+func Test_FailfastInvokeFail(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	invoker := mock.NewMockInvoker(ctrl)
+	clusterInvoker := registerFailfast(t, invoker)
+
+	invoker.EXPECT().GetUrl().Return(failfastUrl)
+
+	mockResult := &protocol.RPCResult{Err: perrors.New("error")}
+
+	invoker.EXPECT().Invoke(gomock.Any()).Return(mockResult)
+	result := clusterInvoker.Invoke(&invocation.RPCInvocation{})
+
+	assert.NotNil(t, result.Error())
+	assert.Equal(t, "error", result.Error().Error())
+	assert.Nil(t, result.Result())
+}
diff --git a/cluster/cluster_impl/failover_cluster_invoker.go b/cluster/cluster_impl/failover_cluster_invoker.go
index cd17a85e00a1d4307b3b861467051e9719345d1a..69664269e2ccf362e6b7a12488fe006802d460e2 100644
--- a/cluster/cluster_impl/failover_cluster_invoker.go
+++ b/cluster/cluster_impl/failover_cluster_invoker.go
@@ -24,7 +24,6 @@ import (
 import (
 	"github.com/apache/dubbo-go/cluster"
 	"github.com/apache/dubbo-go/common/constant"
-	"github.com/apache/dubbo-go/common/extension"
 	"github.com/apache/dubbo-go/common/utils"
 	"github.com/apache/dubbo-go/protocol"
 	"github.com/apache/dubbo-go/version"
@@ -48,17 +47,11 @@ func (invoker *failoverClusterInvoker) Invoke(invocation protocol.Invocation) pr
 	if err != nil {
 		return &protocol.RPCResult{Err: err}
 	}
-	url := invokers[0].GetUrl()
 
-	methodName := invocation.MethodName()
-	//Get the service loadbalance config
-	lb := url.GetParam(constant.LOADBALANCE_KEY, constant.DEFAULT_LOADBALANCE)
+	loadbalance := getLoadBalance(invokers[0], invocation)
 
-	//Get the service method loadbalance config if have
-	if v := url.GetMethodParam(methodName, constant.LOADBALANCE_KEY, ""); v != "" {
-		lb = v
-	}
-	loadbalance := extension.GetLoadbalance(lb)
+	methodName := invocation.MethodName()
+	url := invokers[0].GetUrl()
 
 	//get reties
 	retries := url.GetParamInt(constant.RETRIES_KEY, constant.DEFAULT_RETRIES)
diff --git a/cluster/cluster_impl/failsafe_cluster.go b/cluster/cluster_impl/failsafe_cluster.go
new file mode 100644
index 0000000000000000000000000000000000000000..3ff97d25eae80980a90a03e71865bb8f9a63defe
--- /dev/null
+++ b/cluster/cluster_impl/failsafe_cluster.go
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cluster_impl
+
+import (
+	"github.com/apache/dubbo-go/cluster"
+	"github.com/apache/dubbo-go/common/extension"
+	"github.com/apache/dubbo-go/protocol"
+)
+
+type failsafeCluster struct{}
+
+const failsafe = "failsafe"
+
+func init() {
+	extension.SetCluster(failsafe, NewFailsafeCluster)
+}
+
+func NewFailsafeCluster() cluster.Cluster {
+	return &failsafeCluster{}
+}
+
+func (cluster *failsafeCluster) Join(directory cluster.Directory) protocol.Invoker {
+	return newFailsafeClusterInvoker(directory)
+}
diff --git a/cluster/cluster_impl/failsafe_cluster_invoker.go b/cluster/cluster_impl/failsafe_cluster_invoker.go
new file mode 100644
index 0000000000000000000000000000000000000000..b95f997fef87cf466f07c4e506e41758e7998e52
--- /dev/null
+++ b/cluster/cluster_impl/failsafe_cluster_invoker.go
@@ -0,0 +1,75 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cluster_impl
+
+import (
+	"github.com/apache/dubbo-go/cluster"
+	"github.com/apache/dubbo-go/common/constant"
+	"github.com/apache/dubbo-go/common/extension"
+	"github.com/apache/dubbo-go/common/logger"
+	"github.com/apache/dubbo-go/protocol"
+)
+
+/**
+ * When invoke fails, log the error message and ignore this error by returning an empty Result.
+ * Usually used to write audit logs and other operations
+ *
+ * <a href="http://en.wikipedia.org/wiki/Fail-safe">Fail-safe</a>
+ *
+ */
+type failsafeClusterInvoker struct {
+	baseClusterInvoker
+}
+
+func newFailsafeClusterInvoker(directory cluster.Directory) protocol.Invoker {
+	return &failsafeClusterInvoker{
+		baseClusterInvoker: newBaseClusterInvoker(directory),
+	}
+}
+
+func (invoker *failsafeClusterInvoker) Invoke(invocation protocol.Invocation) protocol.Result {
+	invokers := invoker.directory.List(invocation)
+
+	err := invoker.checkInvokers(invokers, invocation)
+	if err != nil {
+		return &protocol.RPCResult{}
+	}
+
+	url := invokers[0].GetUrl()
+	methodName := invocation.MethodName()
+	//Get the service loadbalance config
+	lb := url.GetParam(constant.LOADBALANCE_KEY, constant.DEFAULT_LOADBALANCE)
+	//Get the service method loadbalance config if have
+	if v := url.GetMethodParam(methodName, constant.LOADBALANCE_KEY, ""); v != "" {
+		lb = v
+	}
+	loadbalance := extension.GetLoadbalance(lb)
+
+	invoked := make([]protocol.Invoker, 0)
+	var result protocol.Result
+
+	ivk := invoker.doSelect(loadbalance, invocation, invokers, invoked)
+	//DO INVOKE
+	result = ivk.Invoke(invocation)
+	if result.Error() != nil {
+		// ignore
+		logger.Errorf("Failsafe ignore exception: %v.\n", result.Error().Error())
+		return &protocol.RPCResult{}
+	}
+	return result
+}
diff --git a/cluster/cluster_impl/failsafe_cluster_test.go b/cluster/cluster_impl/failsafe_cluster_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..9ee9d9fee31b0cb24d877ab3dc0e24fb552f5f11
--- /dev/null
+++ b/cluster/cluster_impl/failsafe_cluster_test.go
@@ -0,0 +1,95 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cluster_impl
+
+import (
+	"context"
+	"testing"
+)
+
+import (
+	"github.com/golang/mock/gomock"
+	perrors "github.com/pkg/errors"
+	"github.com/stretchr/testify/assert"
+)
+
+import (
+	"github.com/apache/dubbo-go/cluster/directory"
+	"github.com/apache/dubbo-go/cluster/loadbalance"
+	"github.com/apache/dubbo-go/common"
+	"github.com/apache/dubbo-go/common/extension"
+	"github.com/apache/dubbo-go/protocol"
+	"github.com/apache/dubbo-go/protocol/invocation"
+	"github.com/apache/dubbo-go/protocol/mock"
+)
+
+var (
+	failsafeUrl, _ = common.NewURL(context.TODO(), "dubbo://192.168.1.1:20000/com.ikurento.user.UserProvider")
+)
+
+// register_failsafe register failsafeCluster to cluster extension.
+func register_failsafe(t *testing.T, invoker *mock.MockInvoker) protocol.Invoker {
+	extension.SetLoadbalance("random", loadbalance.NewRandomLoadBalance)
+	failsafeCluster := NewFailsafeCluster()
+
+	invokers := []protocol.Invoker{}
+	invokers = append(invokers, invoker)
+
+	invoker.EXPECT().GetUrl().Return(failbackUrl)
+
+	staticDir := directory.NewStaticDirectory(invokers)
+	clusterInvoker := failsafeCluster.Join(staticDir)
+	return clusterInvoker
+}
+
+func Test_FailSafeInvokeSuccess(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	invoker := mock.NewMockInvoker(ctrl)
+	clusterInvoker := register_failsafe(t, invoker)
+
+	invoker.EXPECT().GetUrl().Return(failsafeUrl)
+
+	mockResult := &protocol.RPCResult{Rest: rest{tried: 0, success: true}}
+
+	invoker.EXPECT().Invoke(gomock.Any()).Return(mockResult)
+	result := clusterInvoker.Invoke(&invocation.RPCInvocation{})
+
+	assert.NoError(t, result.Error())
+	res := result.Result().(rest)
+	assert.True(t, res.success)
+}
+
+func Test_FailSafeInvokeFail(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	invoker := mock.NewMockInvoker(ctrl)
+	clusterInvoker := register_failsafe(t, invoker)
+
+	invoker.EXPECT().GetUrl().Return(failsafeUrl)
+
+	mockResult := &protocol.RPCResult{Err: perrors.New("error")}
+
+	invoker.EXPECT().Invoke(gomock.Any()).Return(mockResult)
+	result := clusterInvoker.Invoke(&invocation.RPCInvocation{})
+
+	assert.NoError(t, result.Error())
+	assert.Nil(t, result.Result())
+}
diff --git a/cluster/loadbalance/least_active.go b/cluster/loadbalance/least_active.go
index 695ca21b0ed53dcf94907223e4c222af17311db9..39c5620f02d607bb68430e17a206a1649ee31c54 100644
--- a/cluster/loadbalance/least_active.go
+++ b/cluster/loadbalance/least_active.go
@@ -1,14 +1,19 @@
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 // @author yiji@apache.org
 package loadbalance
diff --git a/cluster/loadbalance/round_robin.go b/cluster/loadbalance/round_robin.go
index e173e211c3630f4d4786edc2c1a09709fd7bf0a1..075acac7cdc60086ececb7b655dee86ec5198369 100644
--- a/cluster/loadbalance/round_robin.go
+++ b/cluster/loadbalance/round_robin.go
@@ -1,15 +1,19 @@
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 package loadbalance
 
diff --git a/common/constant/default.go b/common/constant/default.go
index 05461ca6e7360e08d716d6b78d20ad4411df99e8..d103c6aadc0f76d4c4d82fedb89ea2f21f5eb7aa 100644
--- a/common/constant/default.go
+++ b/common/constant/default.go
@@ -26,11 +26,13 @@ const (
 )
 
 const (
-	DEFAULT_LOADBALANCE = "random"
-	DEFAULT_RETRIES     = 2
-	DEFAULT_PROTOCOL    = "dubbo"
-	DEFAULT_REG_TIMEOUT = "10s"
-	DEFAULT_CLUSTER     = "failover"
+	DEFAULT_LOADBALANCE    = "random"
+	DEFAULT_RETRIES        = 2
+	DEFAULT_PROTOCOL       = "dubbo"
+	DEFAULT_REG_TIMEOUT    = "10s"
+	DEFAULT_CLUSTER        = "failover"
+	DEFAULT_FAILBACK_TIMES = 3
+	DEFAULT_FAILBACK_TASKS = 100
 )
 
 const (
@@ -38,6 +40,8 @@ const (
 	PREFIX_DEFAULT_KEY        = "default."
 	DEFAULT_SERVICE_FILTERS   = "echo"
 	DEFAULT_REFERENCE_FILTERS = ""
+	GENERIC_REFERENCE_FILTERS = "generic"
+	GENERIC                   = "$invoke"
 	ECHO                      = "$echo"
 )
 
diff --git a/common/constant/key.go b/common/constant/key.go
index bca658b2623e3ca9241103b5f9c82c7e15fb4062..4d2664baf9b311f6ed8aa8e295599d7e8e5846c4 100644
--- a/common/constant/key.go
+++ b/common/constant/key.go
@@ -30,6 +30,7 @@ const (
 	METHODS_KEY   = "methods"
 	TIMEOUT_KEY   = "timeout"
 	BEAN_NAME_KEY = "bean.name"
+	GENERIC_KEY   = "generic"
 )
 
 const (
@@ -45,6 +46,8 @@ const (
 	WEIGHT_KEY           = "weight"
 	WARMUP_KEY           = "warmup"
 	RETRIES_KEY          = "retries"
+	BEAN_NAME            = "bean.name"
+	FAIL_BACK_TASKS_KEY  = "failbacktasks"
 )
 
 const (
diff --git a/config/config_loader.go b/config/config_loader.go
index 0dd0fb7f963e09a4402f4fd01c8a6b91959a7ca3..720f65f5de6b24b445b7ce07dd2daaba0a856681 100644
--- a/config/config_loader.go
+++ b/config/config_loader.go
@@ -66,6 +66,10 @@ func Load() {
 			logger.Errorf("[consumer config center refresh] %#v", err)
 		}
 		for key, ref := range consumerConfig.References {
+			if ref.Generic {
+				genericService := NewGenericService(key)
+				SetConsumerService(genericService)
+			}
 			rpcService := GetConsumerService(key)
 
 			if rpcService == nil {
diff --git a/config/generic_service.go b/config/generic_service.go
new file mode 100644
index 0000000000000000000000000000000000000000..8a4e88df9788554bc4a5ee33884166e4ccede37f
--- /dev/null
+++ b/config/generic_service.go
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package config
+
+type GenericService struct {
+	Invoke       func(req []interface{}) (interface{}, error) `dubbo:"$invoke"`
+	referenceStr string
+}
+
+func NewGenericService(referenceStr string) *GenericService {
+	return &GenericService{referenceStr: referenceStr}
+}
+
+func (u *GenericService) Reference() string {
+	return u.referenceStr
+}
diff --git a/config/reference_config.go b/config/reference_config.go
index a5b7d50db51df02cd1871b3fb6d0bd2d6a545dd2..67a4a3d816060475fa49182f7141aba9807849e1 100644
--- a/config/reference_config.go
+++ b/config/reference_config.go
@@ -55,6 +55,7 @@ type ReferenceConfig struct {
 	Params        map[string]string `yaml:"params"  json:"params,omitempty" property:"params"`
 	invoker       protocol.Invoker
 	urls          []*common.URL
+	Generic       bool `yaml:"generic"  json:"generic,omitempty" property:"generic"`
 }
 
 func (c *ReferenceConfig) Prefix() string {
@@ -93,7 +94,7 @@ func (refconfig *ReferenceConfig) Refer() {
 				refconfig.urls = append(refconfig.urls, &serviceUrl)
 			} else {
 				if serviceUrl.Path == "" {
-					serviceUrl.Path = "/" + refconfig.InterfaceName
+					serviceUrl.Path = "/" + refconfig.id
 				}
 				// merge url need to do
 				newUrl := common.MergeUrl(serviceUrl, url)
@@ -110,7 +111,6 @@ func (refconfig *ReferenceConfig) Refer() {
 			regUrl.SubURL = url
 		}
 	}
-
 	if len(refconfig.urls) == 1 {
 		refconfig.invoker = extension.GetProtocol(refconfig.urls[0].Protocol).Refer(*refconfig.urls[0])
 	} else {
@@ -157,6 +157,7 @@ func (refconfig *ReferenceConfig) getUrlMap() url.Values {
 	urlMap.Set(constant.RETRIES_KEY, strconv.FormatInt(refconfig.Retries, 10))
 	urlMap.Set(constant.GROUP_KEY, refconfig.Group)
 	urlMap.Set(constant.VERSION_KEY, refconfig.Version)
+	urlMap.Set(constant.GENERIC_KEY, strconv.FormatBool(refconfig.Generic))
 	//getty invoke async or sync
 	urlMap.Set(constant.ASYNC_KEY, strconv.FormatBool(refconfig.async))
 
@@ -170,7 +171,11 @@ func (refconfig *ReferenceConfig) getUrlMap() url.Values {
 	urlMap.Set(constant.ENVIRONMENT_KEY, consumerConfig.ApplicationConfig.Environment)
 
 	//filter
-	urlMap.Set(constant.REFERENCE_FILTER_KEY, mergeValue(consumerConfig.Filter, refconfig.Filter, constant.DEFAULT_REFERENCE_FILTERS))
+	var defaultReferenceFilter = constant.DEFAULT_REFERENCE_FILTERS
+	if refconfig.Generic {
+		defaultReferenceFilter = constant.GENERIC_REFERENCE_FILTERS + defaultReferenceFilter
+	}
+	urlMap.Set(constant.REFERENCE_FILTER_KEY, mergeValue(consumerConfig.Filter, refconfig.Filter, defaultReferenceFilter))
 
 	for _, v := range refconfig.Methods {
 		urlMap.Set("methods."+v.Name+"."+constant.LOADBALANCE_KEY, v.Loadbalance)
@@ -180,3 +185,11 @@ func (refconfig *ReferenceConfig) getUrlMap() url.Values {
 	return urlMap
 
 }
+func (refconfig *ReferenceConfig) GenericLoad(id string) {
+	genericService := NewGenericService(refconfig.id)
+	SetConsumerService(genericService)
+	refconfig.id = id
+	refconfig.Refer()
+	refconfig.Implement(genericService)
+	return
+}
diff --git a/examples/general/dubbo/go-client/app/client.go b/examples/general/dubbo/go-client/app/client.go
index e6f1ae96fb387a1756c8a1c0b026746378377fff..b7ee0e662a26251a79af13d36215cc2cb44fd794 100644
--- a/examples/general/dubbo/go-client/app/client.go
+++ b/examples/general/dubbo/go-client/app/client.go
@@ -25,16 +25,15 @@ import (
 	"syscall"
 	"time"
 )
-
 import (
-	"github.com/apache/dubbo-go-hessian2"
+	hessian "github.com/apache/dubbo-go-hessian2"
 )
 
 import (
 	"github.com/apache/dubbo-go/common/logger"
 	_ "github.com/apache/dubbo-go/common/proxy/proxy_factory"
 	"github.com/apache/dubbo-go/config"
-	_ "github.com/apache/dubbo-go/protocol/dubbo"
+	"github.com/apache/dubbo-go/protocol/dubbo"
 	_ "github.com/apache/dubbo-go/registry/protocol"
 
 	_ "github.com/apache/dubbo-go/filter/impl"
@@ -65,7 +64,8 @@ func main() {
 	test1()
 	println("\n\ntest2")
 	test2()
-
+	println("\n\ntest3")
+	test3()
 	initSignal()
 }
 
@@ -288,3 +288,24 @@ func test2() {
 	}
 	println("error: %v", err)
 }
+func test3() {
+	var appName = "UserProviderGer"
+	var referenceConfig = config.ReferenceConfig{
+		InterfaceName: "com.ikurento.user.UserProvider",
+		Cluster:       "failover",
+		Registry:      "hangzhouzk",
+		Protocol:      dubbo.DUBBO,
+		Generic:       true,
+	}
+	referenceConfig.GenericLoad(appName) //appName is the unique identification of RPCService
+
+	time.Sleep(3 * time.Second)
+	println("\n\n\nstart to generic invoke")
+	resp, err := referenceConfig.GetRPCService().(*config.GenericService).Invoke([]interface{}{"GetUser", []string{"java.lang.String"}, []interface{}{"A003"}})
+	if err != nil {
+		panic(err)
+	}
+	println("res: %v\n", resp)
+	println("succ!")
+
+}
diff --git a/filter/impl/active_filter.go b/filter/impl/active_filter.go
index 435bfe7488c520b14d770aea01b3c3baf4950056..d7dad74cf3f5ccadf39372335bc1efb22f497523 100644
--- a/filter/impl/active_filter.go
+++ b/filter/impl/active_filter.go
@@ -1,14 +1,19 @@
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 // @author yiji@apache.org
 package impl
diff --git a/filter/impl/generic_filter.go b/filter/impl/generic_filter.go
new file mode 100644
index 0000000000000000000000000000000000000000..12cb4c7fa59ac4f1f7c1466f385ea9e9b59567b5
--- /dev/null
+++ b/filter/impl/generic_filter.go
@@ -0,0 +1,125 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package impl
+
+import (
+	"reflect"
+	"strings"
+)
+import (
+	hessian "github.com/apache/dubbo-go-hessian2"
+)
+import (
+	"github.com/apache/dubbo-go/common/constant"
+	"github.com/apache/dubbo-go/common/extension"
+	"github.com/apache/dubbo-go/filter"
+	"github.com/apache/dubbo-go/protocol"
+	invocation2 "github.com/apache/dubbo-go/protocol/invocation"
+)
+
+const (
+	GENERIC = "generic"
+)
+
+func init() {
+	extension.SetFilter(GENERIC, GetGenericFilter)
+}
+
+//  when do a generic invoke, struct need to be map
+
+type GenericFilter struct{}
+
+func (ef *GenericFilter) Invoke(invoker protocol.Invoker, invocation protocol.Invocation) protocol.Result {
+	if invocation.MethodName() == constant.GENERIC && len(invocation.Arguments()) == 3 {
+		oldArguments := invocation.Arguments()
+		var newParams []hessian.Object
+		if oldParams, ok := oldArguments[2].([]interface{}); ok {
+			for i := range oldParams {
+				newParams = append(newParams, hessian.Object(struct2MapAll(oldParams[i])))
+			}
+		} else {
+			return invoker.Invoke(invocation)
+		}
+		newArguments := []interface{}{
+			oldArguments[0],
+			oldArguments[1],
+			newParams,
+		}
+		newInvocation := invocation2.NewRPCInvocation(invocation.MethodName(), newArguments, invocation.Attachments())
+		newInvocation.SetReply(invocation.Reply())
+		return invoker.Invoke(newInvocation)
+	}
+	return invoker.Invoke(invocation)
+}
+
+func (ef *GenericFilter) OnResponse(result protocol.Result, invoker protocol.Invoker, invocation protocol.Invocation) protocol.Result {
+	return result
+}
+
+func GetGenericFilter() filter.Filter {
+	return &GenericFilter{}
+}
+func struct2MapAll(obj interface{}) interface{} {
+	if obj == nil {
+		return obj
+	}
+	t := reflect.TypeOf(obj)
+	v := reflect.ValueOf(obj)
+	if t.Kind() == reflect.Struct {
+		result := make(map[string]interface{}, t.NumField())
+		for i := 0; i < t.NumField(); i++ {
+			if v.Field(i).Kind() == reflect.Struct {
+				if v.Field(i).CanInterface() {
+					setInMap(result, t.Field(i), struct2MapAll(v.Field(i).Interface()))
+				}
+			} else if v.Field(i).Kind() == reflect.Slice {
+				if v.Field(i).CanInterface() {
+					setInMap(result, t.Field(i), struct2MapAll(v.Field(i).Interface()))
+				}
+			} else {
+				if v.Field(i).CanInterface() {
+					setInMap(result, t.Field(i), v.Field(i).Interface())
+				}
+			}
+		}
+		return result
+	} else if t.Kind() == reflect.Slice {
+		value := reflect.ValueOf(obj)
+		var newTemps = make([]interface{}, 0, value.Len())
+		for i := 0; i < value.Len(); i++ {
+			newTemp := struct2MapAll(value.Index(i).Interface())
+			newTemps = append(newTemps, newTemp)
+		}
+		return newTemps
+	} else {
+		return obj
+	}
+}
+func setInMap(m map[string]interface{}, structField reflect.StructField, value interface{}) (result map[string]interface{}) {
+	result = m
+	if tagName := structField.Tag.Get("m"); tagName == "" {
+		result[headerAtoa(structField.Name)] = value
+	} else {
+		result[tagName] = value
+	}
+	return
+}
+func headerAtoa(a string) (b string) {
+	b = strings.ToLower(a[:1]) + a[1:]
+	return
+}
diff --git a/filter/impl/generic_filter_test.go b/filter/impl/generic_filter_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..a71a9db95759a143186fe9a1a4fb0c861c8949e8
--- /dev/null
+++ b/filter/impl/generic_filter_test.go
@@ -0,0 +1,89 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package impl
+
+import (
+	"reflect"
+	"testing"
+)
+import (
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_struct2MapAll(t *testing.T) {
+	var testData struct {
+		AaAa string `m:"aaAa"`
+		BaBa string
+		CaCa struct {
+			AaAa string
+			BaBa string `m:"baBa"`
+			XxYy struct {
+				xxXx string `m:"xxXx"`
+				Xx   string `m:"xx"`
+			} `m:"xxYy"`
+		} `m:"caCa"`
+	}
+	testData.AaAa = "1"
+	testData.BaBa = "1"
+	testData.CaCa.BaBa = "2"
+	testData.CaCa.AaAa = "2"
+	testData.CaCa.XxYy.xxXx = "3"
+	testData.CaCa.XxYy.Xx = "3"
+	m := struct2MapAll(testData).(map[string]interface{})
+	assert.Equal(t, "1", m["aaAa"].(string))
+	assert.Equal(t, "1", m["baBa"].(string))
+	assert.Equal(t, "2", m["caCa"].(map[string]interface{})["aaAa"].(string))
+	assert.Equal(t, "3", m["caCa"].(map[string]interface{})["xxYy"].(map[string]interface{})["xx"].(string))
+
+	assert.Equal(t, reflect.Map, reflect.TypeOf(m["caCa"]).Kind())
+	assert.Equal(t, reflect.Map, reflect.TypeOf(m["caCa"].(map[string]interface{})["xxYy"]).Kind())
+}
+
+type testStruct struct {
+	AaAa string
+	BaBa string `m:"baBa"`
+	XxYy struct {
+		xxXx string `m:"xxXx"`
+		Xx   string `m:"xx"`
+	} `m:"xxYy"`
+}
+
+func Test_struct2MapAll_Slice(t *testing.T) {
+	var testData struct {
+		AaAa string `m:"aaAa"`
+		BaBa string
+		CaCa []testStruct `m:"caCa"`
+	}
+	testData.AaAa = "1"
+	testData.BaBa = "1"
+	var tmp testStruct
+	tmp.BaBa = "2"
+	tmp.AaAa = "2"
+	tmp.XxYy.xxXx = "3"
+	tmp.XxYy.Xx = "3"
+	testData.CaCa = append(testData.CaCa, tmp)
+	m := struct2MapAll(testData).(map[string]interface{})
+
+	assert.Equal(t, "1", m["aaAa"].(string))
+	assert.Equal(t, "1", m["baBa"].(string))
+	assert.Equal(t, "2", m["caCa"].([]interface{})[0].(map[string]interface{})["aaAa"].(string))
+	assert.Equal(t, "3", m["caCa"].([]interface{})[0].(map[string]interface{})["xxYy"].(map[string]interface{})["xx"].(string))
+
+	assert.Equal(t, reflect.Slice, reflect.TypeOf(m["caCa"]).Kind())
+	assert.Equal(t, reflect.Map, reflect.TypeOf(m["caCa"].([]interface{})[0].(map[string]interface{})["xxYy"]).Kind())
+}
diff --git a/go.mod b/go.mod
index aa7ade2f9d5778f088c5ffbb172d4e695f36ad55..7a970d44f0c876021e0d3544760197ac7f26f240 100644
--- a/go.mod
+++ b/go.mod
@@ -1,7 +1,7 @@
 module github.com/apache/dubbo-go
 
 require (
-	github.com/Workiva/go-datastructures v1.0.50 // indirect
+	github.com/Workiva/go-datastructures v1.0.50
 	github.com/apache/dubbo-go-hessian2 v1.2.5-0.20190731020727-1697039810c8
 	github.com/coreos/bbolt v1.3.3 // indirect
 	github.com/coreos/etcd v3.3.13+incompatible
@@ -12,7 +12,8 @@ require (
 	github.com/dubbogo/getty v1.2.2
 	github.com/dubbogo/gost v1.1.1
 	github.com/gogo/protobuf v1.2.1 // indirect
-	github.com/golang/mock v1.3.1 // indirect
+	github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 // indirect
+	github.com/golang/mock v1.3.1
 	github.com/google/btree v1.0.0 // indirect
 	github.com/grpc-ecosystem/go-grpc-middleware v1.0.0 // indirect
 	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 // indirect
@@ -28,6 +29,7 @@ require (
 	github.com/stretchr/testify v1.3.0
 	github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5 // indirect
 	github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2 // indirect
+	go.etcd.io/bbolt v1.3.3 // indirect
 	go.etcd.io/etcd v3.3.13+incompatible
 	go.uber.org/atomic v1.4.0
 	go.uber.org/zap v1.10.0
diff --git a/go.sum b/go.sum
index 57651bf482aad9a10bf314e1b6fac77a53eb5b66..2689e414029eff278e2cc8aa7e141de153a2742a 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,6 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/Workiva/go-datastructures v1.0.50 h1:slDmfW6KCHcC7U+LP3DDBbm4fqTwZGn1beOFPfGaLvo=
 github.com/Workiva/go-datastructures v1.0.50/go.mod h1:Z+F2Rca0qCsVYDS8z7bAGm8f3UkzuWYS/oBZz5a7VVA=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
@@ -38,8 +39,12 @@ github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/me
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.1 h1:/s5zKNz0uPFCZ5hddgPdo2TK2TVrUNMn0OOX8/aZMTE=
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
+github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
+github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 h1:ZgQEtGgCBiWRM39fZuwSd1LwSqqSW0hOdXCYYDX0R3I=
+github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/mock v1.3.1 h1:qGJ6qTW+x6xX/my+8YUVl4WNpX9B7+/l2tRsHGZ7f2s=
 github.com/golang/mock v1.3.1/go.mod h1:sBzyDLLjw3U8JLTeZvSv8jJB+tU5PVekmnlKIyFUx0Y=
 github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
@@ -72,8 +77,10 @@ github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+o
 github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGiHgQ4OO8tzTaLawm8vnODuwDk=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
+github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/magiconair/properties v1.8.1 h1:ZC2Vc7/ZFkGmsVC9KvOjumD+G5lXy2RtTKyzRKO2BQ4=
 github.com/magiconair/properties v1.8.1/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
@@ -121,6 +128,8 @@ github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5 h1:LnC5Kc
 github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
 github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2 h1:eY9dn8+vbi4tKz5Qo6v2eYzo7kUS51QINcR5jNpbZS8=
 github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
+go.etcd.io/bbolt v1.3.3 h1:MUGmc65QhB3pIlaQ5bB4LwqSj6GIonVJXpZiaKNyaKk=
+go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/etcd v3.3.13+incompatible h1:jCejD5EMnlGxFvcGRyEV4VGlENZc7oPQX6o0t7n3xbw=
 go.etcd.io/etcd v3.3.13+incompatible/go.mod h1:yaeTdrJi5lOmYerz05bd8+V7KubZs8YSFZfzsF9A6aI=
 go.uber.org/atomic v1.4.0 h1:cxzIVoETapQEqDhQu3QfnvXAV4AlzcvUCxkVUFw3+EU=
@@ -146,6 +155,7 @@ golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAG
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58 h1:8gQV6CLnAEikrhgkHFbMAEhagSSnXWGV915qUMm9mrU=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -171,7 +181,9 @@ google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZi
 google.golang.org/grpc v1.22.1 h1:/7cs52RnTJmD43s3uxzlq2U7nqVTd/37viQwMrMNlOM=
 google.golang.org/grpc v1.22.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
diff --git a/protocol/RpcStatus.go b/protocol/RpcStatus.go
index b9f3e6ecb18583034e310471164773bebe689cd9..78796b6beaf24dac33d7e0210703a9027f9fe568 100644
--- a/protocol/RpcStatus.go
+++ b/protocol/RpcStatus.go
@@ -1,14 +1,19 @@
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 // @author yiji@apache.org
 package protocol
diff --git a/protocol/dubbo/readwriter.go b/protocol/dubbo/readwriter.go
index b8822311ef83776c62a13a0ea468a185fb94cabf..8c6c8a5a53af4df9a89eae5db5752eb07f3aa446 100644
--- a/protocol/dubbo/readwriter.go
+++ b/protocol/dubbo/readwriter.go
@@ -23,10 +23,11 @@ import (
 )
 
 import (
-	"github.com/apache/dubbo-go-hessian2"
+	hessian "github.com/apache/dubbo-go-hessian2"
 	"github.com/dubbogo/getty"
 	perrors "github.com/pkg/errors"
 )
+
 import (
 	"github.com/apache/dubbo-go/common"
 	"github.com/apache/dubbo-go/common/constant"
diff --git a/protocol/invoker.go b/protocol/invoker.go
index fe6aab848caceed50fc3db3e657ce87c45eac2ed..f5d41a09ad2778c12c7e5e68167a4d0acc9e3f4c 100644
--- a/protocol/invoker.go
+++ b/protocol/invoker.go
@@ -22,6 +22,7 @@ import (
 	"github.com/apache/dubbo-go/common/logger"
 )
 
+//go:generate mockgen -source invoker.go -destination mock/mock_invoker.go  -self_package github.com/apache/dubbo-go/protocol/mock --package mock  Invoker
 // Extension - Invoker
 type Invoker interface {
 	common.Node
diff --git a/protocol/mock/mock_invoker.go b/protocol/mock/mock_invoker.go
new file mode 100644
index 0000000000000000000000000000000000000000..557dafa277e95c39d0b960436ac10ba8842c9186
--- /dev/null
+++ b/protocol/mock/mock_invoker.go
@@ -0,0 +1,87 @@
+// Code generated by MockGen. DO NOT EDIT.
+// Source: invoker.go
+
+// Package mock is a generated GoMock package.
+package mock
+
+import (
+	"reflect"
+)
+
+import (
+	"github.com/golang/mock/gomock"
+)
+
+import (
+	"github.com/apache/dubbo-go/common"
+	"github.com/apache/dubbo-go/protocol"
+)
+
+// MockInvoker is a mock of Invoker interface
+type MockInvoker struct {
+	ctrl     *gomock.Controller
+	recorder *MockInvokerMockRecorder
+}
+
+// MockInvokerMockRecorder is the mock recorder for MockInvoker
+type MockInvokerMockRecorder struct {
+	mock *MockInvoker
+}
+
+// NewMockInvoker creates a new mock instance
+func NewMockInvoker(ctrl *gomock.Controller) *MockInvoker {
+	mock := &MockInvoker{ctrl: ctrl}
+	mock.recorder = &MockInvokerMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use
+func (m *MockInvoker) EXPECT() *MockInvokerMockRecorder {
+	return m.recorder
+}
+
+// GetUrl mocks base method
+func (m *MockInvoker) GetUrl() common.URL {
+	ret := m.ctrl.Call(m, "GetUrl")
+	ret0, _ := ret[0].(common.URL)
+	return ret0
+}
+
+// GetUrl indicates an expected call of GetUrl
+func (mr *MockInvokerMockRecorder) GetUrl() *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetUrl", reflect.TypeOf((*MockInvoker)(nil).GetUrl))
+}
+
+// IsAvailable mocks base method
+func (m *MockInvoker) IsAvailable() bool {
+	ret := m.ctrl.Call(m, "IsAvailable")
+	ret0, _ := ret[0].(bool)
+	return ret0
+}
+
+// IsAvailable indicates an expected call of IsAvailable
+func (mr *MockInvokerMockRecorder) IsAvailable() *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "IsAvailable", reflect.TypeOf((*MockInvoker)(nil).IsAvailable))
+}
+
+// Destroy mocks base method
+func (m *MockInvoker) Destroy() {
+	m.ctrl.Call(m, "Destroy")
+}
+
+// Destroy indicates an expected call of Destroy
+func (mr *MockInvokerMockRecorder) Destroy() *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Destroy", reflect.TypeOf((*MockInvoker)(nil).Destroy))
+}
+
+// Invoke mocks base method
+func (m *MockInvoker) Invoke(arg0 protocol.Invocation) protocol.Result {
+	ret := m.ctrl.Call(m, "Invoke", arg0)
+	ret0, _ := ret[0].(protocol.Result)
+	return ret0
+}
+
+// Invoke indicates an expected call of Invoke
+func (mr *MockInvokerMockRecorder) Invoke(arg0 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Invoke", reflect.TypeOf((*MockInvoker)(nil).Invoke), arg0)
+}
diff --git a/remoting/etcdv3/client.go b/remoting/etcdv3/client.go
index db50b3d46dce2dca8b29582f97fee37fef6db093..fff2271b0f09bc2f83335fc3323de64e49219920 100644
--- a/remoting/etcdv3/client.go
+++ b/remoting/etcdv3/client.go
@@ -224,8 +224,8 @@ func (c *Client) maintenanceStatusLoop(s *concurrency.Session) {
 			c.lock.Lock()
 			// when etcd server stopped, cancel ctx, stop all watchers
 			c.clean()
-		    // when connection lose, stop client, trigger reconnect to etcd
-		    c.stop()
+			// when connection lose, stop client, trigger reconnect to etcd
+			c.stop()
 			c.lock.Unlock()
 			return
 		}
diff --git a/remoting/etcdv3/facede_test.go b/remoting/etcdv3/facede_test.go
index 8718fc3b7456ff74a3e071713fbcd56356bbc8a6..702aaece817283eafd7b7db96b8bb076f1b30cd7 100644
--- a/remoting/etcdv3/facede_test.go
+++ b/remoting/etcdv3/facede_test.go
@@ -6,7 +6,7 @@ import (
 	"time"
 )
 
-import(
+import (
 	"github.com/apache/dubbo-go/common"
 )