diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000000000000000000000000000000000000..6e7fb6b4ac7048604883304adbeb6af9f7a98b79
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,18 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "gomod" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "daily"
+
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the
+    # default location of `.github/workflows`
+    directory: "/"
+    schedule:
+      interval: "daily"
\ No newline at end of file
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
new file mode 100644
index 0000000000000000000000000000000000000000..f2e185cc1eb21e0ac3458f06ef21c407c8e0d06f
--- /dev/null
+++ b/.github/workflows/codeql-analysis.yml
@@ -0,0 +1,54 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [master, ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [master]
+  schedule:
+    - cron: '0 4 * * 5'
+
+jobs:
+  analyse:
+    name: Analyse
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+      with:
+        # We must fetch at least the immediate parents so that if this is
+        # a pull request then we can checkout the head.
+        fetch-depth: 2
+
+    # If this run was triggered by a pull request event, then checkout
+    # the head of the pull request instead of the merge commit.
+    - run: git checkout HEAD^2
+      if: ${{ github.event_name == 'pull_request' }}
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      # Override language selection by uncommenting this and choosing your languages
+      # with:
+      #   languages: go, javascript, csharp, python, cpp, java
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1
diff --git a/.github/workflows/github-actions.yml b/.github/workflows/github-actions.yml
index 7875ca65968a430e03583f91a82784118963e4bc..a585029b03331736773282d043e7d743fd1bb2f9 100644
--- a/.github/workflows/github-actions.yml
+++ b/.github/workflows/github-actions.yml
@@ -50,18 +50,13 @@ jobs:
             go get -v -t -d ./...
         fi
 
-    - name: License Check
+    - name: Verify
       run: |
-        go fmt ./... && [[ -z `git status -s` ]]
-        sh before_validate_license.sh
-        chmod u+x /tmp/tools/license/license-header-checker
-        /tmp/tools/license/license-header-checker -v -a -r -i vendor  /tmp/tools/license/license.txt . go  && [[ -z `git status -s` ]]
+        make verify
 
-    - name: Test
+    - name: Integrate Test
       run: |
-        chmod u+x before_ut.sh && ./before_ut.sh
-        go mod vendor && go test ./... -coverprofile=coverage.txt -covermode=atomic
         chmod +x integrate_test.sh && ./integrate_test.sh
 
-    - name: Coverage
+    - name: Post Coverage
       run: bash <(curl -s https://codecov.io/bash)
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index 8158b497e3620a15fc5a52e91020e1fcebd5be41..898962e244d0ba1d030837f76fed47576f38ab5e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,3 +36,5 @@ config_center/apollo/mockDubbog.properties.json
 # vim stuff
 *~
 .*.sw?
+/license-header-checker-linux/
+/license-header-checker-linux.zip
diff --git a/.travis.yml b/.travis.yml
index 566c88ece05bd80175eea2d1de8fd061a279e273..7b338c277962b1aa4defbf0b285d58cc7c503dbe 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,15 +16,7 @@ install: true
 # define ci-stage
 script:
   # license-check
-  - echo 'start license check'
-  - go fmt ./... && [[ -z `git status -s` ]]
-  - sh before_validate_license.sh
-  - chmod u+x /tmp/tools/license/license-header-checker
-  - /tmp/tools/license/license-header-checker -v -a -r -i vendor  /tmp/tools/license/license.txt . go  && [[ -z `git status -s` ]]
-  # unit-test
-  - echo 'start unit-test'
-  - chmod u+x before_ut.sh && ./before_ut.sh
-  - go mod vendor && go test ./... -coverprofile=coverage.txt -covermode=atomic
+  - make verify
   # integrate-test
   - chmod +x integrate_test.sh && ./integrate_test.sh
 
diff --git a/CHANGE.md b/CHANGE.md
index 90cb5a1443e8062125cbb9f2b3cc0ac1cf759d06..a2849f40648b89d2c7fb9d7f180bfedb729e71d4 100644
--- a/CHANGE.md
+++ b/CHANGE.md
@@ -1,6 +1,51 @@
 # Release Notes
 ---
 
+## 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)
+
 ## 1.5.1
 
 ### New Features
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..2f6c9bd4e21a56fa4a6060db8795ba6e716160bb
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,76 @@
+#
+# 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.
+#
+
+VERSION ?= latest
+
+GO = go
+GO_PATH = $(shell $(GO) env GOPATH)
+GO_OS = $(shell $(GO) env GOOS)
+ifeq ($(GO_OS), darwin)
+    GO_OS = mac
+endif
+GO_BUILD = $(GO) build
+GO_GET = $(GO) get
+GO_TEST = $(GO) test
+GO_BUILD_FLAGS = -v
+GO_BUILD_LDFLAGS = -X main.version=$(VERSION)
+
+GO_LICENSE_CHECKER_DIR = license-header-checker-$(GO_OS)
+GO_LICENSE_CHECKER = $(GO_PATH)/bin/license-header-checker
+LICENSE_DIR = /tmp/tools/license
+
+ARCH = amd64
+# for add zookeeper fatjar
+ZK_TEST_LIST=config_center/zookeeper registry/zookeeper cluster/router/chain cluster/router/condition cluster/router/tag  metadata/report/zookeeper
+ZK_JAR_NAME=zookeeper-3.4.9-fatjar.jar
+ZK_FATJAR_BASE=/zookeeper-4unittest/contrib/fatjar
+ZK_JAR_PATH=remoting/zookeeper$(ZK_FATJAR_BASE)
+ZK_JAR=$(ZK_JAR_PATH)/$(ZK_JAR_NAME)
+
+SHELL = /bin/bash
+
+prepareLic:
+	$(GO_LICENSE_CHECKER) -version || (wget https://github.com/lsm-dev/license-header-checker/releases/download/v1.2.0/$(GO_LICENSE_CHECKER_DIR).zip -O $(GO_LICENSE_CHECKER_DIR).zip && unzip -o $(GO_LICENSE_CHECKER_DIR).zip && mkdir -p $(GO_PATH)/bin/ && cp $(GO_LICENSE_CHECKER_DIR)/64bit/license-header-checker $(GO_PATH)/bin/)
+	ls /tmp/tools/license/license.txt || wget -P $(LICENSE_DIR) https://github.com/dubbogo/resources/raw/master/tools/license/license.txt
+
+prepareZk:
+	ls $(ZK_JAR) || (mkdir -p $(ZK_JAR_PATH)&&  wget -P $(ZK_JAR_PATH) https://github.com/dubbogo/resources/raw/master/zookeeper-4unitest/contrib/fatjar/${ZK_JAR_NAME})
+	@for i in $(ZK_TEST_LIST); do \
+		mkdir -p $$i$(ZK_FATJAR_BASE);\
+		cp ${ZK_JAR} $$i$(ZK_FATJAR_BASE);\
+	done
+
+prepare: prepareZk prepareLic
+
+.PHONE: test
+test: clean prepareZk
+	$(GO_TEST) ./... -coverprofile=coverage.txt -covermode=atomic
+
+deps: prepare
+	$(GO_GET) -v -t -d ./...
+
+.PHONY: license
+license: clean prepareLic
+	$(GO_LICENSE_CHECKER) -v -a -r -i vendor $(LICENSE_DIR)/license.txt . go && [[ -z `git status -s` ]]
+
+.PHONY: verify
+verify: clean license test
+
+.PHONY: clean
+clean: prepare
+	rm -rf coverage.txt
+	rm -rf license-header-checker*
diff --git a/README.md b/README.md
index 9e1edd3af1cd8957b1daa9b9fe2cadf121bc2d6d..bf0a5e9a64cb240de7b9a410f0e879401d9aa266 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,12 @@ Apache License, Version 2.0
 
 ## Release note ##
 
+[v1.5.4 - Nov 1, 2020](https://github.com/apache/dubbo-go/releases/tag/v1.5.4)
+
+[v1.5.3 - Sep 23, 2020](https://github.com/apache/dubbo-go/releases/tag/v1.5.3)
+
+[v1.5.2 - discard]()
+
 [v1.5.1 - Aug 23, 2020](https://github.com/apache/dubbo-go/releases/tag/v1.5.1)
 
 [v1.5.0 - July 24, 2020](https://github.com/apache/dubbo-go/releases/tag/v1.5.0)
@@ -60,7 +66,7 @@ Finished List:
     * Jsonrpc2.0
     * [gRPC](https://github.com/apache/dubbo-go/pull/311)
     * [RESTful](https://github.com/apache/dubbo-go/pull/352)
-    
+
 - Router
     * [Condition router](https://github.com/apache/dubbo-go/pull/294)
     * [Health check router](https://github.com/apache/dubbo-go/pull/389)
@@ -105,7 +111,7 @@ Finished List:
 
 - Invoke
     * [generic invoke](https://github.com/apache/dubbo-go/pull/122)
-    
+
 - Monitor
     * Opentracing API
     * [Prometheus](https://github.com/apache/dubbo-go/pull/342)
@@ -144,28 +150,26 @@ https://dubbogo.github.io/dubbo-go-website (**Improving**)
 
 ## Quick Start
 
-[dubbo-samples/golang](https://github.com/dubbogo/dubbo-samples) shows how to use dubbo-go. Please read the [dubbo-samples/golang/README.md](https://github.com/dubbogo/dubbo-samples/blob/master/golang/README.md) carefully to learn how to dispose the configuration and compile the program.
+[dubbo-go-samples](https://github.com/apache/dubbo-go-samples) shows how to use dubbo-go. Please read the [dubbo-samples/golang/README.md](https://github.com/apache/dubbo-go-samples/blob/master/README.md) carefully to learn how to dispose the configuration and compile the program.
 
 ## Running unit tests
 
-### Prepare
+### Run
 
-Mac/Linux
 ```bash
-sh ./before_ut.sh
+make verify
 ```
 
-Windows
+### Verify license
+
 ```bash
-before_ut.bat
+make license
 ```
 
-### Run
-```bash
-go test ./...
+### Run unit test
 
-# coverage
-go test ./... -coverprofile=coverage.txt -covermode=atomic
+```bash
+make test
 ```
 
 ## Build
@@ -212,6 +216,19 @@ If you are using [apache/dubbo-go](github.com/apache/dubbo-go) and think that it
           <img width="222px"  src="https://raw.githubusercontent.com/mosn/community/master/icons/png/mosn-labeled-horizontal.png">
         </a>
       </td>
+      <td align="center"  valign="middle">
+        <a href="" target="_blank">
+          <img width="222px"  src="https://festatic.estudy.cn/assets/xhx-web/layout/logo.png">
+        </a>
+      </td>
+    </tr>
+    <tr></tr>
+    <tr>
+      <td align="center"  valign="middle">
+        <a href="http://www.j.cn" target="_blank">
+          <img width="222px"  src="http://image.guang.j.cn/bbs/imgs/home/pc/icon_8500.png">
+        </a>
+      </td>
     </tr>
     <tr></tr>
   </tbody>
diff --git a/README_CN.md b/README_CN.md
index b76d8983deae427f9317c4f930f0e06da479f484..5b83e8b79f9ed81442ba6ee9cf56758feac1c016 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -15,6 +15,14 @@ Apache License, Version 2.0
 
 ## 发布日志 ##
 
+[v1.5.4 - 2020年11月1日](https://github.com/apache/dubbo-go/releases/tag/v1.5.4)
+
+[v1.5.3 - 2020年9月23日](https://github.com/apache/dubbo-go/releases/tag/v1.5.3)
+
+[v1.5.2 - 舍弃]()
+
+[v1.5.1 - 2020年8月23日](https://github.com/apache/dubbo-go/releases/tag/v1.5.1)
+
 [v1.5.0 - 2020年7月24日](https://github.com/apache/dubbo-go/releases/tag/v1.5.0)
 
 [v1.4.0 - 2020年3月17日](https://github.com/apache/dubbo-go/releases/tag/v1.4.0)
@@ -95,6 +103,7 @@ Apache License, Version 2.0
     * [AccessLogFilter](https://github.com/apache/dubbo-go/pull/214)
     * [TpsLimitFilter](https://github.com/apache/dubbo-go/pull/237)
     * [ExecuteLimitFilter](https://github.com/apache/dubbo-go/pull/246)
+    * [GenericServiceFilter](https://github.com/apache/dubbo-go/pull/291)
     * [Auth/Sign](https://github.com/apache/dubbo-go/pull/323)
     * [Metrics filter](https://github.com/apache/dubbo-go/pull/342)
     * [Tracing filter](https://github.com/apache/dubbo-go/pull/335)
@@ -144,29 +153,27 @@ https://dubbogo.github.io/dubbo-go-website (**完善中**)
 
 ## 运行单测
 
-### 准备
+### 执行全部校验
 
-Mac/Linux
 ```bash
-sh ./before_ut.sh
+make verify
 ```
 
-Windows
+### 校验许可证
+
 ```bash
-before_ut.bat
+make license
 ```
 
-### 执行
-```bash
-go test ./...
+### 执行单元测试
 
-# coverage
-go test ./... -coverprofile=coverage.txt -covermode=atomic
+```bash
+make test
 ```
 
 ## 编译
 
-请移步 [dubbo-samples/golang](https://github.com/dubbogo/dubbo-samples)
+请移步 [dubbo-go-samples](https://github.com/apache/dubbo-go-samples)
 
 ## 如何贡献
 
@@ -207,8 +214,21 @@ go test ./... -coverprofile=coverage.txt -covermode=atomic
           <img width="222px"  src="https://raw.githubusercontent.com/mosn/community/master/icons/png/mosn-labeled-horizontal.png">
         </a>
       </td>
+      <td align="center"  valign="middle">
+        <a href="" target="_blank">
+          <img width="222px"  src="https://festatic.estudy.cn/assets/xhx-web/layout/logo.png">
+        </a>
+      </td>
+    </tr>
+    <tr></tr>
+    <tr>
+      <td align="center"  valign="middle">
+        <a href="http://www.j.cn" target="_blank">
+          <img width="222px"  src="http://image.guang.j.cn/bbs/imgs/home/pc/icon_8500.png">
+        </a>
+      </td>
     </tr>
     <tr></tr>
   </tbody>
 </table>
-</div>
+</div>
\ No newline at end of file
diff --git a/before_ut.bat b/before_ut.bat
deleted file mode 100644
index b8d72e4a873ef4ff9653c6f16ebd4378ce1ee172..0000000000000000000000000000000000000000
--- a/before_ut.bat
+++ /dev/null
@@ -1,43 +0,0 @@
-::
-::  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.
-
-set zkJarName=zookeeper-3.4.9-fatjar.jar
-set remoteJarUrl="https://github.com/dubbogo/resources/raw/master/zookeeper-4unitest/contrib/fatjar/%zkJarName%"
-set zkJarPath=remoting/zookeeper/zookeeper-4unittest/contrib/fatjar
-set zkJar=%zkJarPath%/%zkJarName%
-
-if not exist "%zkJar%" (
-   md "%zkJarPath%"
-   curl -L %remoteJarUrl% -o %zkJar%
-)
-
-md config_center\zookeeper\zookeeper-4unittest\contrib\fatjar
-xcopy /f "%zkJar%" "config_center/zookeeper/zookeeper-4unittest/contrib/fatjar/"
-
-md registry\zookeeper\zookeeper-4unittest\contrib\fatjar
-xcopy /f "%zkJar%" "registry/zookeeper/zookeeper-4unittest/contrib/fatjar/"
-
-md cluster\router\chain\zookeeper-4unittest\contrib\fatjar
-xcopy /f "%zkJar%" "cluster/router/chain/zookeeper-4unittest/contrib/fatjar/"
-
-md cluster\router\condition\zookeeper-4unittest\contrib\fatjar
-xcopy /f "%zkJar%" "cluster/router/condition/zookeeper-4unittest/contrib/fatjar/"
-
-md cluster/router/tag/zookeeper-4unittest/contrib/fatjar
-xcopy /f "%zkJar%" "cluster/router/tag/zookeeper-4unittest/contrib/fatjar/"
-
-md metadata\report\zookeeper\zookeeper-4unittest\contrib\fatjar
-xcopy /f "%zkJar%" "metadata/report/zookeeper/zookeeper-4unittest/contrib/fatjar/"
\ No newline at end of file
diff --git a/before_ut.sh b/before_ut.sh
deleted file mode 100755
index b55e424ef72b33181b2ea40fdb37ac319110aec0..0000000000000000000000000000000000000000
--- a/before_ut.sh
+++ /dev/null
@@ -1,43 +0,0 @@
-#
-#  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.
-
-zkJarName="zookeeper-3.4.9-fatjar.jar"
-remoteJarUrl="https://github.com/dubbogo/resources/raw/master/zookeeper-4unitest/contrib/fatjar/${zkJarName}"
-zkJarPath="remoting/zookeeper/zookeeper-4unittest/contrib/fatjar"
-zkJar="${zkJarPath}/${zkJarName}"
-
-if [ ! -f "${zkJar}" ]; then
-    mkdir -p ${zkJarPath}
-    wget -P "${zkJarPath}" ${remoteJarUrl}
-fi
-
-mkdir -p config_center/zookeeper/zookeeper-4unittest/contrib/fatjar
-cp ${zkJar} config_center/zookeeper/zookeeper-4unittest/contrib/fatjar
-
-mkdir -p registry/zookeeper/zookeeper-4unittest/contrib/fatjar
-cp ${zkJar} registry/zookeeper/zookeeper-4unittest/contrib/fatjar
-
-mkdir -p cluster/router/chain/zookeeper-4unittest/contrib/fatjar
-cp ${zkJar} cluster/router/chain/zookeeper-4unittest/contrib/fatjar
-
-mkdir -p cluster/router/condition/zookeeper-4unittest/contrib/fatjar
-cp ${zkJar} cluster/router/condition/zookeeper-4unittest/contrib/fatjar
-
-mkdir -p cluster/router/tag/zookeeper-4unittest/contrib/fatjar
-cp ${zkJar} cluster/router/tag/zookeeper-4unittest/contrib/fatjar
-
-mkdir -p metadata/report/zookeeper/zookeeper-4unittest/contrib/fatjar
-cp ${zkJar} metadata/report/zookeeper/zookeeper-4unittest/contrib/fatjar
\ No newline at end of file
diff --git a/before_validate_license.sh b/before_validate_license.sh
deleted file mode 100644
index 8fa6e381c7a4cd44835d107ba9213f685f899a10..0000000000000000000000000000000000000000
--- a/before_validate_license.sh
+++ /dev/null
@@ -1,26 +0,0 @@
-#
-#  Licensed to the Apache Software Foundation (ASF) under one or more
-#  contributor license agreements.  See the NOTICE file distributed with
-#  this work for additional information regarding copyright ownership.
-#  The ASF licenses this file to You under the Apache License, Version 2.0
-#  (the "License"); you may not use this file except in compliance with
-#  the License.  You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-#  Unless required by applicable law or agreed to in writing, software
-#  distributed under the License is distributed on an "AS IS" BASIS,
-#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-#  See the License for the specific language governing permissions and
-#  limitations under the License.
-
-remoteLicenseCheckerPath="https://github.com/dubbogo/resources/raw/master/tools/license"
-remoteLicenseCheckerName="license-header-checker"
-remoteLicenseCheckerURL="${remoteLicenseCheckerPath}/${remoteLicenseCheckerName}"
-remoteLicenseName="license.txt"
-remoteLicenseURL="${remoteLicenseCheckerPath}/${remoteLicenseName}"
-
-licensePath="/tmp/tools/license"
-mkdir -p ${licensePath}
-wget -P "${licensePath}" ${remoteLicenseCheckerURL}
-wget -P "${licensePath}" ${remoteLicenseURL}
diff --git a/cluster/cluster_impl/base_cluster_invoker.go b/cluster/cluster_impl/base_cluster_invoker.go
index ced5b15cb9a1c2292ca866f6f7478ce2b23a30b9..0ac851f72752ab7f91ff3cd7bc9a9e462a927c57 100644
--- a/cluster/cluster_impl/base_cluster_invoker.go
+++ b/cluster/cluster_impl/base_cluster_invoker.go
@@ -22,7 +22,6 @@ import (
 )
 
 import (
-	gxnet "github.com/dubbogo/gost/net"
 	perrors "github.com/pkg/errors"
 	"go.uber.org/atomic"
 )
@@ -32,6 +31,7 @@ import (
 	"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/logger"
 	"github.com/apache/dubbo-go/protocol"
 )
 
@@ -72,7 +72,7 @@ func (invoker *baseClusterInvoker) IsAvailable() bool {
 //check invokers availables
 func (invoker *baseClusterInvoker) checkInvokers(invokers []protocol.Invoker, invocation protocol.Invocation) error {
 	if len(invokers) == 0 {
-		ip, _ := gxnet.GetLocalIP()
+		ip := common.GetLocalIp()
 		return perrors.Errorf("Failed to invoke the method %v. No provider available for the service %v from "+
 			"registry %v on the consumer %v using the dubbo version %v .Please check if the providers have been started and registered.",
 			invocation.MethodName(), invoker.directory.GetUrl().SubURL.Key(), invoker.directory.GetUrl().String(), ip, constant.Version)
@@ -84,7 +84,7 @@ func (invoker *baseClusterInvoker) checkInvokers(invokers []protocol.Invoker, in
 //check cluster invoker is destroyed or not
 func (invoker *baseClusterInvoker) checkWhetherDestroyed() error {
 	if invoker.destroyed.Load() {
-		ip, _ := gxnet.GetLocalIP()
+		ip := common.GetLocalIp()
 		return perrors.Errorf("Rpc cluster invoker for %v on consumer %v use dubbo version %v is now destroyed! can not invoke any more. ",
 			invoker.directory.GetUrl().Service(), ip, constant.Version)
 	}
@@ -120,6 +120,10 @@ 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
+	}
 	if len(invokers) == 1 {
 		return invokers[0]
 	}
@@ -134,6 +138,8 @@ func (invoker *baseClusterInvoker) doSelectInvoker(lb cluster.LoadBalance, invoc
 
 		for _, invoker := range invokers {
 			if !invoker.IsAvailable() {
+				logger.Infof("the invoker of %s is not available, maybe some network error happened or the server is shutdown.",
+					invoker.GetUrl().Ip)
 				continue
 			}
 
@@ -145,6 +151,7 @@ func (invoker *baseClusterInvoker) doSelectInvoker(lb cluster.LoadBalance, invoc
 		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
 		}
 	}
diff --git a/cluster/cluster_impl/failover_cluster_invoker.go b/cluster/cluster_impl/failover_cluster_invoker.go
index 4260a9324dd360ac24f80e425d8542a423c8815e..ca490e7f8e2ff44303abe7d695313153b7466a00 100644
--- a/cluster/cluster_impl/failover_cluster_invoker.go
+++ b/cluster/cluster_impl/failover_cluster_invoker.go
@@ -24,12 +24,12 @@ import (
 )
 
 import (
-	gxnet "github.com/dubbogo/gost/net"
 	perrors "github.com/pkg/errors"
 )
 
 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/logger"
 	"github.com/apache/dubbo-go/protocol"
@@ -51,6 +51,7 @@ func (invoker *failoverClusterInvoker) Invoke(ctx context.Context, invocation pr
 		result    protocol.Result
 		invoked   []protocol.Invoker
 		providers []string
+		ivk       protocol.Invoker
 	)
 
 	invokers := invoker.directory.List(invocation)
@@ -75,7 +76,7 @@ func (invoker *failoverClusterInvoker) Invoke(ctx context.Context, invocation pr
 				return &protocol.RPCResult{Err: err}
 			}
 		}
-		ivk := invoker.doSelect(loadBalance, invocation, invokers, invoked)
+		ivk = invoker.doSelect(loadBalance, invocation, invokers, invoked)
 		if ivk == nil {
 			continue
 		}
@@ -88,10 +89,17 @@ func (invoker *failoverClusterInvoker) Invoke(ctx context.Context, invocation pr
 		}
 		return result
 	}
-
-	ip, _ := gxnet.GetLocalIP()
+	ip := common.GetLocalIp()
 	invokerSvc := invoker.GetUrl().Service()
 	invokerUrl := invoker.directory.GetUrl()
+	if ivk == nil {
+		logger.Errorf("Failed to invoke the method %s of the service %s .No provider is available.", methodName, invokerSvc)
+		return &protocol.RPCResult{
+			Err: perrors.Errorf("Failed to invoke the method %s of the service %s .No provider is available because can't connect server.",
+				methodName, invokerSvc),
+		}
+	}
+
 	return &protocol.RPCResult{
 		Err: perrors.Wrap(result.Error(), fmt.Sprintf("Failed to invoke the method %v in the service %v. "+
 			"Tried %v times of the providers %v (%v/%v)from the registry %v on the consumer %v using the dubbo version %v. "+
diff --git a/cluster/cluster_impl/forking_cluster_invoker.go b/cluster/cluster_impl/forking_cluster_invoker.go
index 168444881653ca38ef61a9bc8e50f2d4bc3e624c..3ffda580ce9847bb60a0a837c5fac6b420450141 100644
--- a/cluster/cluster_impl/forking_cluster_invoker.go
+++ b/cluster/cluster_impl/forking_cluster_invoker.go
@@ -56,7 +56,7 @@ func (invoker *forkingClusterInvoker) Invoke(ctx context.Context, invocation pro
 	}
 
 	var selected []protocol.Invoker
-	forks := int(invoker.GetUrl().GetParamInt(constant.FORKS_KEY, constant.DEFAULT_FORKS))
+	forks := invoker.GetUrl().GetParamByIntValue(constant.FORKS_KEY, constant.DEFAULT_FORKS)
 	timeouts := invoker.GetUrl().GetParamInt(constant.TIMEOUT_KEY, constant.DEFAULT_TIMEOUT)
 	if forks < 0 || forks > len(invokers) {
 		selected = invokers
diff --git a/cluster/directory/base_directory_test.go b/cluster/directory/base_directory_test.go
index a2b62dfa008e6cd17b1200d93cd235da17d03905..e51e533f2e27ac8fbb6e4b19e8a32e6be2025855 100644
--- a/cluster/directory/base_directory_test.go
+++ b/cluster/directory/base_directory_test.go
@@ -24,7 +24,6 @@ import (
 )
 
 import (
-	gxnet "github.com/dubbogo/gost/net"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -55,7 +54,7 @@ func TestBuildRouterChain(t *testing.T) {
 
 	assert.NotNil(t, directory)
 
-	localIP, _ := gxnet.GetLocalIP()
+	localIP := common.GetLocalIp()
 	rule := base64.URLEncoding.EncodeToString([]byte("true => " + " host = " + localIP))
 	routeURL := getRouteURL(rule, anyURL)
 	routeURL.AddParam(constant.INTERFACE_KEY, "mock-app")
@@ -79,7 +78,7 @@ func TestIsProperRouter(t *testing.T) {
 	regURL := url
 	regURL.AddParam(constant.APPLICATION_KEY, "mock-app")
 	d := NewBaseDirectory(&regURL)
-	localIP, _ := gxnet.GetLocalIP()
+	localIP := common.GetLocalIp()
 	rule := base64.URLEncoding.EncodeToString([]byte("true => " + " host = " + localIP))
 	routeURL := getRouteURL(rule, anyURL)
 	routeURL.AddParam(constant.APPLICATION_KEY, "mock-app")
diff --git a/cluster/loadbalance/consistent_hash.go b/cluster/loadbalance/consistent_hash.go
index 27ce2369f9de6dfe76bd35581ea26f0e0c24e480..3d036b4f3c5c50874e09efb8fd1ef34e969585d8 100644
--- a/cluster/loadbalance/consistent_hash.go
+++ b/cluster/loadbalance/consistent_hash.go
@@ -105,7 +105,7 @@ func newConsistentHashSelector(invokers []protocol.Invoker, methodName string,
 	selector.virtualInvokers = make(map[uint32]protocol.Invoker)
 	selector.hashCode = hashCode
 	url := invokers[0].GetUrl()
-	selector.replicaNum = int(url.GetMethodParamInt(methodName, HashNodes, 160))
+	selector.replicaNum = url.GetMethodParamIntValue(methodName, HashNodes, 160)
 	indices := re.Split(url.GetMethodParam(methodName, HashArguments, "0"), -1)
 	for _, index := range indices {
 		i, err := strconv.Atoi(index)
diff --git a/cluster/router/chain/chain.go b/cluster/router/chain/chain.go
index 04129ebb435de5dac6a8548bbd9962d720a134ec..bb88efe02bd550c7f9e7a3cef745f91de5f6ede6 100644
--- a/cluster/router/chain/chain.go
+++ b/cluster/router/chain/chain.go
@@ -125,8 +125,8 @@ func (c *RouterChain) SetInvokers(invokers []protocol.Invoker) {
 // 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.
 func (c *RouterChain) loop() {
+	ticker := time.NewTicker(timeInterval)
 	for {
-		ticker := time.NewTicker(timeInterval)
 		select {
 		case <-ticker.C:
 			c.buildCache()
diff --git a/cluster/router/condition/factory_test.go b/cluster/router/condition/factory_test.go
index b31f6c7a82ea102c6e0b80d68e43f7b359785544..8fdfae7404e25179350bd2d2279bb0f1a21169fc 100644
--- a/cluster/router/condition/factory_test.go
+++ b/cluster/router/condition/factory_test.go
@@ -26,7 +26,6 @@ import (
 )
 
 import (
-	"github.com/dubbogo/gost/net"
 	perrors "github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 )
@@ -164,7 +163,7 @@ func TestRoute_matchWhen(t *testing.T) {
 }
 
 func TestRoute_matchFilter(t *testing.T) {
-	localIP, _ := gxnet.GetLocalIP()
+	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")
 	url2, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
@@ -223,7 +222,7 @@ func TestRoute_methodRoute(t *testing.T) {
 
 func TestRoute_ReturnFalse(t *testing.T) {
 	url, _ := common.NewURL("")
-	localIP, _ := gxnet.GetLocalIP()
+	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"))
@@ -234,7 +233,7 @@ func TestRoute_ReturnFalse(t *testing.T) {
 }
 
 func TestRoute_ReturnEmpty(t *testing.T) {
-	localIP, _ := gxnet.GetLocalIP()
+	localIP := common.GetLocalIp()
 	url, _ := common.NewURL("")
 	invokers := []protocol.Invoker{NewMockInvoker(url, 1), NewMockInvoker(url, 2), NewMockInvoker(url, 3)}
 	inv := &invocation.RPCInvocation{}
@@ -246,7 +245,7 @@ func TestRoute_ReturnEmpty(t *testing.T) {
 }
 
 func TestRoute_ReturnAll(t *testing.T) {
-	localIP, _ := gxnet.GetLocalIP()
+	localIP := common.GetLocalIp()
 	urlString := "dubbo://" + localIP + "/com.foo.BarService"
 	dubboURL, _ := common.NewURL(urlString)
 	mockInvoker1 := NewMockInvoker(dubboURL, 1)
@@ -262,7 +261,7 @@ func TestRoute_ReturnAll(t *testing.T) {
 }
 
 func TestRoute_HostFilter(t *testing.T) {
-	localIP, _ := gxnet.GetLocalIP()
+	localIP := common.GetLocalIp()
 	url1, _ := common.NewURL(factory333URL)
 	url2, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
 	url3, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
@@ -281,7 +280,7 @@ func TestRoute_HostFilter(t *testing.T) {
 }
 
 func TestRoute_Empty_HostFilter(t *testing.T) {
-	localIP, _ := gxnet.GetLocalIP()
+	localIP := common.GetLocalIp()
 	url1, _ := common.NewURL(factory333URL)
 	url2, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
 	url3, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
@@ -300,7 +299,7 @@ func TestRoute_Empty_HostFilter(t *testing.T) {
 }
 
 func TestRoute_False_HostFilter(t *testing.T) {
-	localIP, _ := gxnet.GetLocalIP()
+	localIP := common.GetLocalIp()
 	url1, _ := common.NewURL(factory333URL)
 	url2, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
 	url3, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
@@ -319,7 +318,7 @@ func TestRoute_False_HostFilter(t *testing.T) {
 }
 
 func TestRoute_Placeholder(t *testing.T) {
-	localIP, _ := gxnet.GetLocalIP()
+	localIP := common.GetLocalIp()
 	url1, _ := common.NewURL(factory333URL)
 	url2, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
 	url3, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
@@ -338,7 +337,7 @@ func TestRoute_Placeholder(t *testing.T) {
 }
 
 func TestRoute_NoForce(t *testing.T) {
-	localIP, _ := gxnet.GetLocalIP()
+	localIP := common.GetLocalIp()
 	url1, _ := common.NewURL(factory333URL)
 	url2, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
 	url3, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
@@ -355,7 +354,7 @@ func TestRoute_NoForce(t *testing.T) {
 }
 
 func TestRoute_Force(t *testing.T) {
-	localIP, _ := gxnet.GetLocalIP()
+	localIP := common.GetLocalIp()
 	url1, _ := common.NewURL(factory333URL)
 	url2, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
 	url3, _ := common.NewURL(fmt.Sprintf(factoryDubboFormat, localIP))
diff --git a/cluster/router/condition/router.go b/cluster/router/condition/router.go
index 4267f5b405367950d38c5d7af705e663f4416602..48f2aae133e5c784570dc4b470766b431938efc4 100644
--- a/cluster/router/condition/router.go
+++ b/cluster/router/condition/router.go
@@ -25,7 +25,6 @@ import (
 import (
 	"github.com/RoaringBitmap/roaring"
 	"github.com/dubbogo/gost/container/set"
-	"github.com/dubbogo/gost/net"
 	perrors "github.com/pkg/errors"
 )
 
@@ -184,7 +183,7 @@ func (c *ConditionRouter) Route(invokers *roaring.Bitmap, cache router.Cache, ur
 		return result
 	} else if c.Force {
 		rule, _ := url.GetParamAndDecoded(constant.RULE_KEY)
-		localIP, _ := gxnet.GetLocalIP()
+		localIP := common.GetLocalIp()
 		logger.Warnf("The route result is empty and force execute. consumer: %s, service: %s, router: %s", localIP, url.Service(), rule)
 		return result
 	}
diff --git a/cluster/router/healthcheck/default_health_check.go b/cluster/router/healthcheck/default_health_check.go
index c522bdf0f98244f5f8bdfba6085cb45dd89c1004..3effd779c989ed8e68c91eb6eab20d10d8b04e8c 100644
--- a/cluster/router/healthcheck/default_health_check.go
+++ b/cluster/router/healthcheck/default_health_check.go
@@ -48,6 +48,10 @@ type DefaultHealthChecker struct {
 // IsHealthy evaluates the healthy state on the given Invoker based on the number of successive bad request
 // and the current active request
 func (c *DefaultHealthChecker) IsHealthy(invoker protocol.Invoker) bool {
+	if !invoker.IsAvailable() {
+		return false
+	}
+
 	urlStatus := protocol.GetURLStatus(invoker.GetUrl())
 	if c.isCircuitBreakerTripped(urlStatus) || urlStatus.GetActive() > c.GetOutStandingRequestCountLimit() {
 		logger.Debugf("Invoker [%s] is currently in circuitbreaker tripped state", invoker.GetUrl().Key())
@@ -92,6 +96,7 @@ func (c *DefaultHealthChecker) getCircuitBreakerSleepWindowTime(status *protocol
 	return int64(sleepWindow)
 }
 
+
 // GetRequestSuccessiveFailureThreshold return the requestSuccessiveFailureThreshold bound to this DefaultHealthChecker
 func (c *DefaultHealthChecker) GetRequestSuccessiveFailureThreshold() int32 {
 	return c.requestSuccessiveFailureThreshold
@@ -110,8 +115,8 @@ func (c *DefaultHealthChecker) GetOutStandingRequestCountLimit() int32 {
 // NewDefaultHealthChecker constructs a new DefaultHealthChecker based on the url
 func NewDefaultHealthChecker(url *common.URL) router.HealthChecker {
 	return &DefaultHealthChecker{
-		outStandingRequestConutLimit:      int32(url.GetParamInt(constant.OUTSTANDING_REQUEST_COUNT_LIMIT_KEY, math.MaxInt32)),
-		requestSuccessiveFailureThreshold: int32(url.GetParamInt(constant.SUCCESSIVE_FAILED_REQUEST_THRESHOLD_KEY, constant.DEFAULT_SUCCESSIVE_FAILED_REQUEST_MAX_DIFF)),
-		circuitTrippedTimeoutFactor:       int32(url.GetParamInt(constant.CIRCUIT_TRIPPED_TIMEOUT_FACTOR_KEY, constant.DEFAULT_CIRCUIT_TRIPPED_TIMEOUT_FACTOR)),
+		outStandingRequestConutLimit:      url.GetParamInt32(constant.OUTSTANDING_REQUEST_COUNT_LIMIT_KEY, math.MaxInt32),
+		requestSuccessiveFailureThreshold: url.GetParamInt32(constant.SUCCESSIVE_FAILED_REQUEST_THRESHOLD_KEY, constant.DEFAULT_SUCCESSIVE_FAILED_REQUEST_MAX_DIFF),
+		circuitTrippedTimeoutFactor:       url.GetParamInt32(constant.CIRCUIT_TRIPPED_TIMEOUT_FACTOR_KEY, constant.DEFAULT_CIRCUIT_TRIPPED_TIMEOUT_FACTOR),
 	}
 }
diff --git a/common/constant/key.go b/common/constant/key.go
index 943338f8e6f13512d96cfed4cbc4f275d6aab2cb..9525511cdaac64083cc595e1c0a6327a4ded6f9c 100644
--- a/common/constant/key.go
+++ b/common/constant/key.go
@@ -25,6 +25,7 @@ const (
 	GROUP_KEY                = "group"
 	VERSION_KEY              = "version"
 	INTERFACE_KEY            = "interface"
+	MESSAGE_SIZE_KEY         = "message_size"
 	PATH_KEY                 = "path"
 	SERVICE_KEY              = "service"
 	METHODS_KEY              = "methods"
diff --git a/common/host_util.go b/common/host_util.go
new file mode 100644
index 0000000000000000000000000000000000000000..9861c92bee15624dd79e02a6e3aba6b443dbd7da
--- /dev/null
+++ b/common/host_util.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 common
+
+import gxnet "github.com/dubbogo/gost/net"
+
+var localIp string
+
+func GetLocalIp() string {
+	if len(localIp) != 0 {
+		return localIp
+	}
+	localIp, _ = gxnet.GetLocalIP()
+	return localIp
+}
diff --git a/common/host_util_test.go b/common/host_util_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..ad96dde4c77667a940c27455262a6aeca921a73d
--- /dev/null
+++ b/common/host_util_test.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 common
+
+import (
+	"testing"
+)
+
+import (
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetLocalIp(t *testing.T) {
+	assert.NotNil(t, GetLocalIp())
+}
diff --git a/common/proxy/proxy_test.go b/common/proxy/proxy_test.go
index c6066157fd8d2147fd3a319c8d48fdd910752711..9f5eaadf7cb5967fb585e2df808b0194e6abe249 100644
--- a/common/proxy/proxy_test.go
+++ b/common/proxy/proxy_test.go
@@ -24,7 +24,6 @@ import (
 )
 
 import (
-	"github.com/apache/dubbo-go/protocol/invocation"
 	perrors "github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 )
@@ -34,6 +33,7 @@ import (
 	"github.com/apache/dubbo-go/common/constant"
 	"github.com/apache/dubbo-go/protocol"
 	"github.com/apache/dubbo-go/protocol/dubbo/hessian2"
+	"github.com/apache/dubbo-go/protocol/invocation"
 )
 
 type TestService struct {
diff --git a/common/url.go b/common/url.go
index 8297afdaad235cbd9a70b057e0f43db6c48dbf82..3a88001c5fb345aa004e5a3975df89cbec2c415a 100644
--- a/common/url.go
+++ b/common/url.go
@@ -484,22 +484,49 @@ func (c URL) GetParamBool(key string, d bool) bool {
 	return r
 }
 
-// GetParamInt gets int value by @key
+// GetParamInt gets int64 value by @key
 func (c URL) GetParamInt(key string, d int64) int64 {
-	r, err := strconv.Atoi(c.GetParam(key, ""))
-	if r == 0 || err != nil {
+	r, err := strconv.ParseInt(c.GetParam(key, ""), 10, 64)
+	if  err != nil {
 		return d
 	}
-	return int64(r)
+	return r
+}
+
+// GetParamInt32 gets int32 value by @key
+func (c URL) GetParamInt32(key string, d int32) int32 {
+	r, err := strconv.ParseInt(c.GetParam(key, ""), 10, 32)
+	if  err != nil {
+		return d
+	}
+	return int32(r)
+}
+
+// GetParamByIntValue gets int value by @key
+func (c URL) GetParamByIntValue(key string, d int) int {
+	r, err := strconv.ParseInt(c.GetParam(key, ""), 10, 0)
+	if  err != nil {
+		return d
+	}
+	return int(r)
 }
 
 // GetMethodParamInt gets int method param
 func (c URL) GetMethodParamInt(method string, key string, d int64) int64 {
-	r, err := strconv.Atoi(c.GetParam("methods."+method+"."+key, ""))
-	if r == 0 || err != nil {
+	r, err := strconv.ParseInt(c.GetParam("methods."+method+"."+key, ""), 10, 64)
+	if err != nil {
+		return d
+	}
+	return r
+}
+
+// GetMethodParamIntValue gets int method param
+func (c URL) GetMethodParamIntValue(method string, key string, d int) int {
+	r, err := strconv.ParseInt(c.GetParam("methods."+method+"."+key, ""), 10, 0)
+	if err != nil {
 		return d
 	}
-	return int64(r)
+	return int(r)
 }
 
 // GetMethodParamInt64 gets int64 method param
diff --git a/common/url_test.go b/common/url_test.go
index 6845190a7362571ebbd4738bd146c94f6d644253..12020f4289904d22c0d64a6df1cea2903394a016 100644
--- a/common/url_test.go
+++ b/common/url_test.go
@@ -167,10 +167,22 @@ func TestURLGetParam(t *testing.T) {
 
 func TestURLGetParamInt(t *testing.T) {
 	params := url.Values{}
-	params.Set("key", "3")
+	params.Set("key", "")
 	u := URL{baseUrl: baseUrl{params: params}}
 	v := u.GetParamInt("key", 1)
-	assert.Equal(t, int64(3), v)
+	assert.Equal(t, int64(1), v)
+
+	u = URL{}
+	v = u.GetParamInt("key", 1)
+	assert.Equal(t, int64(1), v)
+}
+
+func TestURLGetParamIntValue(t *testing.T) {
+	params := url.Values{}
+	params.Set("key", "0")
+	u := URL{baseUrl: baseUrl{params: params}}
+	v := u.GetParamInt("key", 1)
+	assert.Equal(t, int64(0), v)
 
 	u = URL{}
 	v = u.GetParamInt("key", 1)
diff --git a/config/config_loader.go b/config/config_loader.go
index c66e526921e7e5ab017105e2f4ea2baa62563205..f2102249c6e835c62e69613388bdd0c3dc4c750a 100644
--- a/config/config_loader.go
+++ b/config/config_loader.go
@@ -28,7 +28,6 @@ import (
 )
 
 import (
-	gxnet "github.com/dubbogo/gost/net"
 	perrors "github.com/pkg/errors"
 )
 
@@ -250,7 +249,7 @@ func createInstance(url common.URL) (registry.ServiceInstance, error) {
 
 	host := url.Ip
 	if len(host) == 0 {
-		host, err = gxnet.GetLocalIP()
+		host = common.GetLocalIp()
 		if err != nil {
 			return nil, perrors.WithMessage(err, "could not get the local Ip")
 		}
diff --git a/config/service_config.go b/config/service_config.go
index 48632a1b1e295eb5ec3027bd495ef8d19e978ec4..9a274436dd510ce18d2dda6f11dd6d5ef298f0be 100644
--- a/config/service_config.go
+++ b/config/service_config.go
@@ -73,6 +73,7 @@ type ServiceConfig struct {
 	Auth                        string            `yaml:"auth" json:"auth,omitempty" property:"auth"`
 	ParamSign                   string            `yaml:"param.sign" json:"param.sign,omitempty" property:"param.sign"`
 	Tag                         string            `yaml:"tag" json:"tag,omitempty" property:"tag"`
+	GrpcMaxMessageSize          int               `default:"4" yaml:"max_message_size" json:"max_message_size,omitempty"`
 
 	Protocols     map[string]*ProtocolConfig
 	unexported    *atomic.Bool
@@ -271,6 +272,7 @@ func (c *ServiceConfig) getUrlMap() url.Values {
 	urlMap.Set(constant.ROLE_KEY, strconv.Itoa(common.PROVIDER))
 	urlMap.Set(constant.RELEASE_KEY, "dubbo-golang-"+constant.Version)
 	urlMap.Set(constant.SIDE_KEY, (common.RoleType(common.PROVIDER)).Role())
+	urlMap.Set(constant.MESSAGE_SIZE_KEY, strconv.Itoa(c.GrpcMaxMessageSize))
 	// todo: move
 	urlMap.Set(constant.SERIALIZATION_KEY, c.Serialization)
 	// application info
diff --git a/config/service_config_test.go b/config/service_config_test.go
index 4d4122ee7057043af47aa0400ca8c5b5e9a20cd0..61c8864b6ab7eb146a92e76187cd6363bbdb8dc8 100644
--- a/config/service_config_test.go
+++ b/config/service_config_test.go
@@ -18,11 +18,11 @@
 package config
 
 import (
+	"github.com/apache/dubbo-go/common"
 	"testing"
 )
 
 import (
-	gxnet "github.com/dubbogo/gost/net"
 	"github.com/stretchr/testify/assert"
 	"go.uber.org/atomic"
 )
@@ -184,7 +184,7 @@ func TestExport(t *testing.T) {
 func TestGetRandomPort(t *testing.T) {
 	protocolConfigs := make([]*ProtocolConfig, 0, 3)
 
-	ip, err := gxnet.GetLocalIP()
+	ip := common.GetLocalIp()
 	protocolConfigs = append(protocolConfigs, &ProtocolConfig{
 		Ip: ip,
 	})
@@ -194,7 +194,7 @@ func TestGetRandomPort(t *testing.T) {
 	protocolConfigs = append(protocolConfigs, &ProtocolConfig{
 		Ip: ip,
 	})
-	assert.NoError(t, err)
+	//assert.NoError(t, err)
 	ports := getRandomPort(protocolConfigs)
 
 	assert.Equal(t, ports.Len(), len(protocolConfigs))
diff --git a/config_center/configurator/override.go b/config_center/configurator/override.go
index ec4e606e0dff300729e2a2bc56f510db94ea9f26..7f5abb6175056b44a5d9c6a9fa527ad6e9ac6791 100644
--- a/config_center/configurator/override.go
+++ b/config_center/configurator/override.go
@@ -23,7 +23,6 @@ import (
 
 import (
 	gxset "github.com/dubbogo/gost/container/set"
-	gxnet "github.com/dubbogo/gost/net"
 )
 
 import (
@@ -61,7 +60,7 @@ func (c *overrideConfigurator) Configure(url *common.URL) {
 		currentSide := url.GetParam(constant.SIDE_KEY, "")
 		configuratorSide := c.configuratorUrl.GetParam(constant.SIDE_KEY, "")
 		if currentSide == configuratorSide && common.DubboRole[common.CONSUMER] == currentSide && c.configuratorUrl.Port == "0" {
-			localIP, _ := gxnet.GetLocalIP()
+			localIP := common.GetLocalIp()
 			c.configureIfMatch(localIP, url)
 		} else if currentSide == configuratorSide && common.DubboRole[common.PROVIDER] == currentSide && c.configuratorUrl.Port == url.Port {
 			c.configureIfMatch(url.Ip, url)
@@ -127,7 +126,7 @@ func (c *overrideConfigurator) configureDeprecated(url *common.URL) {
 		// 1.If it is a consumer ip address, the intention is to control a specific consumer instance, it must takes effect at the consumer side, any provider received this override url should ignore;
 		// 2.If the ip is 0.0.0.0, this override url can be used on consumer, and also can be used on provider
 		if url.GetParam(constant.SIDE_KEY, "") == common.DubboRole[common.CONSUMER] {
-			localIP, _ := gxnet.GetLocalIP()
+			localIP := common.GetLocalIp()
 			c.configureIfMatch(localIP, url)
 		} else {
 			c.configureIfMatch(constant.ANYHOST_VALUE, url)
diff --git a/doc/apache/apache-release-procedure-20200306.md b/doc/apache/apache-release-procedure-20200306.md
new file mode 100644
index 0000000000000000000000000000000000000000..3f677ff56b8a97f881ae3d1b9bf842754ddb05ab
--- /dev/null
+++ b/doc/apache/apache-release-procedure-20200306.md
@@ -0,0 +1,448 @@
+
+# Apache 软件发版流程
+
+> author: wongoo@apache.org
+> last updated: 2020-03-06
+
+Apache开源软件是有社区驱动的,为了提高发布软件质量而指定了软件发布流程,本文主要介绍此流程,以给第一次发布打包的apacher参考。
+
+如果你要准备打包一个apache软件了,想必你已经是一个项目的committer了,而且知道社区、PMC这些概念,而你现在还担任本次发布的 release manager 一职。
+
+发版流程其实也很简单,无非如下:
+1. 整理变更内容,打包并对打包文件签名;
+2. 将签名文件上传apache svn仓库;
+3. 发邮件请社区PMC大佬投票;
+4. 投票通过后发一个投票结果通告邮件;
+5. 发版
+6. 发版邮件通告社区新版本发布;
+
+下面详细整理发版的一些流程步骤,使用 dubbo 的子项目 dubbog-go-hessian2 发版为例!
+
+
+## 1. 发版准备
+
+发版文件需要签名,需要安装pgp工具. 
+
+```bash
+$ brew install gpg
+$ gpg --version
+$ gpg --full-gen-key
+	(1) RSA and RSA (default)  <-- RSA 类型
+	What keysize do you want? (2048) 4096  <-- key大小为4096
+	0 = key does not expire    <-- 永不过期
+	Real name: Liu Yang
+	Email address: wongoo@apache.org
+	Comment: CODE SIGNING KEY
+
+	gpg: /Users/gelnyang/.gnupg/trustdb.gpg: trustdb created
+	gpg: key 7DB68550D366E4C0 marked as ultimately trusted
+	gpg: revocation certificate stored as '/Users/gelnyang/.gnupg/openpgp-revocs.d/1376A2FF67E4C477573909BD7DB68550D366E4C0.rev'
+	public and secret key created and signed.
+
+	pub   rsa4096 2019-10-17 [SC]
+	      1376A2FF67E4C477573909BD7DB68550D366E4C0
+	uid                      Liu Yang (CODE SIGNING KEY) <wongoo@apache.org>
+	sub   rsa4096 2019-10-17 [E]
+
+$ gpg --list-keys	
+	gpg: checking the trustdb
+	gpg: marginals needed: 3  completes needed: 1  trust model: pgp
+	gpg: depth: 0  valid:   1  signed:   0  trust: 0-, 0q, 0n, 0m, 0f, 1u
+	/Users/gelnyang/.gnupg/pubring.kbx
+	----------------------------------
+	pub   rsa4096 2019-10-17 [SC]
+	      1376A2FF67E4C477573909BD7DB68550D366E4C0
+	uid           [ultimate] Liu Yang (CODE SIGNING KEY) <wongoo@apache.org>
+	sub   rsa4096 2019-10-17 [E]
+
+
+# 公钥服务器是网络上专门储存用户公钥的服务器
+# 通过key id发送public key到keyserver
+$ gpg --keyserver pgpkeys.mit.edu --send-key 1376A2FF67E4C477573909BD7DB68550D366E4C0
+	gpg: sending key 7DB68550D366E4C0 to hkp://pgpkeys.mit.edu
+# 其中,pgpkeys.mit.edu为随意挑选的keyserver,keyserver列表为:https://sks-keyservers.net/status/,为相互之间是自动同步的,选任意一个都可以。
+
+# 如果有多个public key,设置默认key。修改 ~/.gnupg/gpg.conf
+$ vi ~/.gnupg/gpg.conf
+default-key 7DB68550D366E4C0
+
+# 如果有多个public key, 也可以删除无用的key:
+### 先删除私钥,再删除公钥
+$ gpg --yes --delete-secret-keys shenglicao2@gmail.com   ###老的私钥,指明邮箱即可
+$ gpg --delete-keys 1808C6444C781C0AEA0AAD4C4D6A8007D20DB8A4
+
+## 由于公钥服务器没有检查机制,任何人都可以用你的名义上传公钥,所以没有办法保证服务器上的公钥的可靠性。
+## 通常,你可以在网站上公布一个公钥指纹,让其他人核对下载到的公钥是否为真。
+# fingerprint参数生成公钥指纹:
+$ gpg --fingerprint wongoo
+
+	pub   rsa4096 2019-10-17 [SC]
+	      1376 A2FF 67E4 C477 5739  09BD 7DB6 8550 D366 E4C0
+	uid           [ultimate] Liu Yang (CODE SIGNING KEY) <wongoo@apache.org>
+	sub   rsa4096 2019-10-17 [E]
+	# 将上面的 fingerprint (即 1376 A2FF 67E4 C477 5739  09BD 7DB6 8550 D366 E4C0)粘贴到自己的用户信息中:
+	# https://id.apache.org  OpenPGP Public Key Primary Fingerprint:
+```
+
+> 详细参考:
+> - 发布签名: http://www.apache.org/dev/release-signing.html
+> - 发布策略: http://www.apache.org/dev/release-distribution
+> - 将密钥上传到公共密钥服务器: https://www.apache.org/dev/openpgp.html#generate-key
+
+## 2. 打包签名
+
+准备打包前(尤其提第一次打包)需要注意以下内容:
+- 每个文件的LICENSE头部是否正确, 包括 `*.java`, `*.go`, `*.xml`, `Makefile` 等
+- LICENSE 文件是否存在
+- NOTICE 文件是否存在
+- CHANGE.md 是否存在 (变更内容格式符合规范)
+
+以上可以参考其他已发布项目的配置。
+
+
+```
+
+# NOTICE: 这里切分支,分支名称不要和版本号(tag用)类似,不然会有冲突
+$ git checkout -b 1.4
+
+$ git tag -a v1.4.0-rc1 -m "v1.4.0 release candidate 1"
+
+$ git push --tags
+
+# 打包
+$ git archive --format=tar 1.4 --prefix=dubbo-go-hessian2-v1.4.0/ | gzip > dubbo-go-hessian2-v1.4.0-src.tar.gz
+
+# 签名
+$ gpg -u wongoo@apache.org --armor --output dubbo-go-hessian2-v1.4.0-src.tar.gz.asc --detach-sign dubbo-go-hessian2-v1.4.0-src.tar.gz
+
+# 验证签名
+$ gpg --verify dubbo-go-hessian2-v1.4.0-src.tar.gz.asc dubbo-go-hessian2-v1.4.0-src.tar.gz
+
+# hash
+$ shasum -a 512 dubbo-go-hessian2-v1.4.0-src.tar.gz > dubbo-go-hessian2-v1.4.0-src.tar.gz.sha512
+
+# 验证 hash
+$ shasum --check dubbo-go-hessian2-v1.4.0-src.tar.gz.sha512
+
+```
+
+> 发布版本: http://www.apache.org/dev/release-publishing.html
+
+## 3. 上传打包文件到svn仓库
+
+```
+$ svn checkout https://dist.apache.org/repos/dist/dev/dubbo
+
+$ cd dubbo
+
+# 更新
+$ svn update
+
+# 添加 签名 和 public key 到KEYS文件并提交到SVN仓库
+# 这里是将公钥KEYS放到根目录, 有的项目放到本次打包文件目录
+$ (gpg --list-sigs wongoo && gpg --armor --export wongoo) >> KEYS
+
+$ mkdir -p dubbo-go-hessian2/v1.4.0-rc1
+
+# 拷贝相关文件到新建目录下
+
+$ tree dubbo-go-hessian2
+dubbo-go-hessian2
+└── v1.4.0-rc1
+    ├── dubbo-go-hessian2-v1.4.0-src.tar.gz
+    ├── dubbo-go-hessian2-v1.4.0-src.tar.gz.asc
+    └── dubbo-go-hessian2-v1.4.0-src.tar.gz.sha512
+
+$ svn add dubbo-go-hessian2
+$ svn add dubbo-go-hessian2/*
+$ svn status
+$ svn commit  --username wongoo -m "Release dubbo-go-hessian2 v1.4.0-rc1"
+```
+
+> 详细参考: svn版本管理 https://www.apache.org/dev/version-control.html
+
+
+## 4. 发投票 [VOTE] 邮件
+
+发任何邮件都是有一定格式的,你加入社区邮件列表后,就会收到很多这样的邮件,多看看就知道了,具体邮件范本参考文章后面的邮件范本。
+
+发完【VOTE】邮件,私下沟通群里面请大佬PMC投票。
+PMC投票会对你上传打包文件进行相关检查, 
+详细可以了解孵化中的项目发布完整的检查项参考: https://cwiki.apache.org/confluence/display/INCUBATOR2/IncubatorReleaseChecklist
+
+收到3个binding邮件且超过72小时后,就可以发 投票结果 [RESULT] [VOTE] 邮件了。
+
+> 原则上只有PMC的投票才算binding邮件, 当然也可以由社区决定。
+
+这一步骤最常见有以下问题:
+- 文件签名有问题
+- 引用项目LICENSE问题
+- 单元测试不通过
+
+> 另外需要注意: 一个apache项目可能包含很多子项目,项目的PMC可能只对主项目比较了解,	他们并不清楚如何将子项目跑起来,也不知道如何跑单元测试,最好在邮件中附带一个如何进行单元测试的连接。例如 PMC 最了解 java,但子项目是golang,python,js等,你需要告诉他们如何测试你的项目。
+
+可以参考投票规则: https://www.apache.org/foundation/voting.html
+
+## 5. 发布版本
+
+当正式发布投票成功后,先发[Result]邮件,然后就准备 release package。 
+将之前在dev下发布的对应rc文件夹下的源码包、签名文件和hash文件拷贝到另一个目录 v1.4.0,
+注意文件名字中不要rcxx (可以rename,但不要重新计算签名,hash可以重新计算,结果不会变)。
+
+将release包移动到正式版目录。如果你的软件是需要客户从apache下载的,则这一步是必须的。如果不是,比如golang引用github打包地址的则可以忽略。
+```
+svn up
+cd dubbo-go-hessian2
+svn move v1.4.0-rc1 v1.4.0
+svn status
+svn commit  --username wongoo -m "Release dubbo-go-hessian2 v1.4.0"
+```
+
+移到发版目录后,还需要进行相应的正式版本发布, 这里将具体发布方式整理到单独的章节 `7. 不同语言版本发布`,因为发布流程马上就要结束了 ^v^
+
+
+## 6. 新版本通告 ANNOUNCE 邮件
+
+恭喜你你已经到发版最后一步了,邮件格式参考以下邮件范本!
+
+
+## 7. 不同语言版本发布
+
+### 7.1 golang
+
+在 github 基于投票分支发布了 release 版本。
+
+### 7.2 java
+
+java项目发版需发布到java maven仓库。
+
+TODO
+
+### 7.3 js
+
+js项目发版需发布到npm仓库。
+
+TODO
+
+### 7.4 python
+
+TODO
+
+## 8. 邮件范本
+
+### 8.1. 提出发版投票
+
+- TO: dev@dubbo.apache.org
+- Title: [VOTE] Release Apache dubbo-go-hessian2 v1.4.0 RC1
+
+```
+Hello Dubbo/Dubbogo Community,
+
+ This is a call for vote to release Apache dubbo-go-hessian2 version v1.4.0 RC1.
+
+ The release candidates: https://dist.apache.org/repos/dist/dev/dubbo/dubbo-go-hessian2/v1.4.0-rc1/
+ Git tag for the release: https://github.com/apache/dubbo-go-hessian2/tree/1.4
+ Hash for the release tag: 4c31e88c35afe84c0321d9f12f036e6d3c8962d0
+ Release Notes: https://github.com/apache/dubbo-go-hessian2/blob/1.4/CHANGE.md
+ The artifacts have been signed with Key :7DB68550D366E4C0, which can be found in the keys file:
+ https://dist.apache.org/repos/dist/dev/dubbo/KEYS
+
+ The vote will be open for at least 72 hours or until necessary number of votes are reached.
+
+ Please vote accordingly:
+ [ ] +1 approve
+ [ ] +0 no opinion
+ [ ] -1 disapprove with the reason
+ 
+ Thanks,
+ The Apache Dubbo-go Team
+ ```
+
+
+### 8.2. PMC 投票邮件回复
+
+
+范例1:
+```
++1 approve   <-- 首先表明同不同意
+
+I have checked:    <-- 其次要说明自己检查了哪些项
+
+1.source code can build          <-- 能否构建
+2.tests can pass in my local     <-- 单元测试能否通过
+3. NOTICE LICENSE file exist     <-- 协议文件是否存在
+4.git tag is correct             <-- git tag 是否正确
+
+there is one minor thing that in change logs file, there is no space
+between text And link. I suggest add one to make it looks better.  <--- 一些其他改进建议
+```
+
+范例2:
+```
++1
+
+I checked the following items:
+
+[v] Are release files in correct location?                    <-- 发布文件目录是否正确
+[v] Do release files have the word incubating in their name?  
+[v] Are the digital signature and hashes correct?             <-- 签名、hash是否正确
+[v] Do LICENSE and NOTICE files exists?
+[v] Is the LICENSE and NOTICE text correct?                   <-- 协议文本是否正确
+[v] Is the NOTICE year correct?                               <-- 注意年份是否正确
+[v] Un-included software dependencies are not mentioned in LICENSE or NOTICE?   <-- 没有包含协议或注意没有提到的软件依赖
+[v] License information is not mentioned in NOTICE?           <-- 协议信息没有在注意中提及
+[x] Is there any 3rd party code contained inside the release? If so:   <-- 是否包含第三方代码
+     [ ] Does the software have a compatible license?
+     [ ] Are all software licenses mentioned in LICENSE?
+     [ ] Is the full text of the licenses (or pointers to it) in LICENSE?
+     Is any of this code Apache licensed? Do they have NOTICE files? If so:
+     [ ] Have relevant parts of those NOTICE files been added to this NOTICE file?
+[v] Do all source files have ASF headers?                             <-- 是否所有源码都有ASF头部
+[v] Do the contents of the release match with what's tagged in version control?   <-- 发布的文件是否和github中tag标记的版本一致
+[x] Are there any unexpected binary files in the release?             <-- 是否包含不应该存在的二进制文件
+[v] Can you compile from source? Are the instruction clear?           <-- 能否编译?指令是否明确?
+
+On my mac laptop, I could compile successfully but there's one failed unit
+test against net.go. I believe this issue [1] can be fixed with [2] in the
+next release.       <-- 编译问题及建议
+
+Is the issue minor?  <-- 编译存在的问题是否都是较小的?
+[v] Yes [ ] No [ ] Unsure
+
+Could it possibly be fixed in the next release?  <-- 能否在下一版本修复?
+[v] Yes [ ] No [ ] Unsure
+
+I vote with:   <-- 我的投票
+[v] +1 release the software
+[ ] +0 not sure if it should be released
+[ ] -1 don’t release the software because...
+
+Regards,
+-Ian.
+
+1. https://github.com/apache/dubbo-go/issues/207
+2. https://github.com/apache/dubbo-go/pull/209
+```
+
+范例3:
+```
++1
+
+I checked the following items:
+
+[√] Do LICENSE and NOTICE files exists?
+[√] Is the LICENSE and NOTICE text correct?
+[√] Is the NOTICE year correct?
+[√] Do all source files have ASF headers?
+[√] Do the contents of the release match with what's tagged in version control?
+[√] Can you compile from source?
+I could compile successfully but there's failed units test.  I run the unit
+test refer to :https://github.com/apache/dubbo-go#running-unit-tests .
+But I think it is not matter, the test can be fixed in next release.
+
+
+I vote with:
+[√] +1 release the software
+```
+
+范例4:
+```
+Great improvement over the previous release but there are still issues from the last vote that have not been resolved. e.g. [6][7][8]
+
+Can someone tell me if these files [1][2][3][4][5] are just missing ASF headers or have a different license?
+
+If they are just missing headers and [6][7][8] explained then it +1 form me, otherwise it’s probably a -1.
+
+Can people please carefully check the contents, and write down what you checked, rather than just saying +1.
+
+I checked:
+- signatures and hashes good
+- LICENSE is missing the appendix (not a major issue)
+- LICENSE may be is missing some information[1][2][3][4][5]
+- NOTICE is fine
+- No binaries in source release
+- Some files are missing ASF headers or other license headers [1][2][3][4][5] - please fix
+
+Thanks,
+Justin
+
+1. dubbo-go-1.1.0/cluster/loadbalance/round_robin_test.go
+2. dubbo-go-1.1.0/common/extension/router_factory.go
+3. dubbo-go-1.1.0/config_center/configuration_parser.go
+4. dubbo-go-1.1.0/config_center/configuration_parser_test.go
+5. dubbo-go-1.1.0/registry/zookeeper/listener_test.go
+6. dubbo-go-1.1.0/cluster/loadbalance/least_active.go
+7. dubbo-go-1.1.0/protocol/RpcStatus.go
+8. dubbo-go-1.1.0/filter/impl/active_filter.go
+```
+
+
+### 8.3. 发 [RESULT] [VOTE] 投票结果通知邮件
+
+- TO: dev@dubbo.apache.org
+- Title: [RESULT] [VOTE]: Release Apache dubbo-go-hessian2 v1.4.0 RC1
+
+
+```
+Hello Dubbo/Dubbogo Community,
+
+The release dubbo-go-hessian2 v1.4.0 RC1 vote finished, We’ve received 3 +1 (binding) votes.
+
++1 binding, Stocks Alex
++1 binding, Ian Luo
++1 binding, Jun Liu
+
+The vote and result thread:
+https://lists.apache.org/thread.html/r8070f3b00984888069dd4ddad1bbc424cde51ea68b6ff0520e609e18%40%3Cdev.dubbo.apache.org%3E
+
+
+The vote passed. Thanks all.
+I will proceed with the formal release later.
+
+
+Best regards,
+
+The Apache Dubbogo Team
+```
+
+
+### 8.4. 发 Announce 发版邮件
+
+- TO: dev@dubbo.apache.org
+- [ANNOUNCE] Apache Dubbo version 2.7.4 Released
+
+```
+Hello Community,
+
+The Apache Dubbo team is pleased to announce that the 2.7.4 has been
+released.
+
+Apache Dubbo™  is a high-performance, java based, open source
+RPC framework. Dubbo offers three key functionalities, which include
+interface based remote call, fault tolerance & load balancing, and
+automatic service registration & discovery.
+
+Both the source release[1] and the maven binary release[2] are available
+now, you can also find the detailed release notes in here[3].
+
+
+If you have any usage questions, or have problems when upgrading or find
+any problems about enhancements included in this release, please don’t
+hesitate to let us know by sending feedback to this mailing list or filing
+an issue on GitHub[4].
+
+
+
+[1] http://dubbo.apache.org/en-us/blog/download.html
+[2] http://central.maven.org/maven2/org/apache/dubbo
+[3] https://github.com/apache/dubbo/releases
+[4] https://github.com/apache/dubbo/issues
+```
+
+## 9. 参考
+
+- dubbo发布流程: http://dubbo.apache.org/zh-cn/docs/developers/committer-guide/release-guide_dev.html
+- doris发布流程: https://github.com/apache/incubator-doris/blob/master/docs/documentation/cn/community/release-process.md
+- spark发布流程: http://spark0apache0org.icopy.site/release-process.html
+
+
diff --git a/doc/apache/release_note.md b/doc/apache/release_note.md
new file mode 100644
index 0000000000000000000000000000000000000000..747a3348a1324cc059906fae16cb432b3bc6188d
--- /dev/null
+++ b/doc/apache/release_note.md
@@ -0,0 +1,11 @@
+### How to release a new version?
+---
+
+* 1 Check the time range of NOTICE;
+* 2 Add the features to the feature list of README.md/README_CN.md/CHANGE.md;
+* 3 Check whether every code file has the Apache License 2.0 or not;
+* 4 There should not be author info(name & email etc) exist in code file;
+* 5 Run all unit tests;
+* 6 Run all samples in apache/dubbo-samples/golang;
+* 7 Write "What's New" by releaser who should be an apache/dubbo-go committer;
+* 8 And then, u can release a new version refer to [Apache 软件发版流程](./apache-release-procedure-20200306.md);
\ No newline at end of file
diff --git a/doc/pic/arch/dubbo-go-arch.png b/doc/pic/arch/dubbo-go-arch.png
new file mode 100644
index 0000000000000000000000000000000000000000..0a28cb6a3af6953d2ad10390ddff5b7d82166ecc
Binary files /dev/null and b/doc/pic/arch/dubbo-go-arch.png differ
diff --git a/doc/pic/arch/dubbo-go-ext.png b/doc/pic/arch/dubbo-go-ext.png
new file mode 100644
index 0000000000000000000000000000000000000000..b60ecdf47ef190f097fccaf2d74070f6712ea80d
Binary files /dev/null and b/doc/pic/arch/dubbo-go-ext.png differ
diff --git a/filter/filter_impl/generic_filter.go b/filter/filter_impl/generic_filter.go
index d385054ed98518177aea5e574e034cb35c72e398..36b4b13186361d85beea0625eeda1ad58c3f2dca 100644
--- a/filter/filter_impl/generic_filter.go
+++ b/filter/filter_impl/generic_filter.go
@@ -21,6 +21,7 @@ import (
 	"context"
 	"reflect"
 	"strings"
+	"time"
 )
 
 import (
@@ -93,13 +94,21 @@ func struct2MapAll(obj interface{}) interface{} {
 	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 || v.Field(i).Kind() == reflect.Slice || v.Field(i).Kind() == reflect.Map {
-				if v.Field(i).CanInterface() {
-					setInMap(result, t.Field(i), struct2MapAll(v.Field(i).Interface()))
+			field := t.Field(i)
+			value := v.Field(i)
+			kind := value.Kind()
+			if kind == reflect.Struct || kind == reflect.Slice || kind == reflect.Map {
+				if value.CanInterface() {
+					tmp := value.Interface()
+					if _, ok := tmp.(time.Time); ok {
+						setInMap(result, field, tmp)
+						continue
+					}
+					setInMap(result, field, struct2MapAll(tmp))
 				}
 			} else {
-				if v.Field(i).CanInterface() {
-					setInMap(result, t.Field(i), v.Field(i).Interface())
+				if value.CanInterface() {
+					setInMap(result, field, value.Interface())
 				}
 			}
 		}
diff --git a/filter/filter_impl/generic_filter_test.go b/filter/filter_impl/generic_filter_test.go
index e40733209b2e1db972ab576dea54f206a1e888c0..40cf743106821f12425d1abe6dbc82bad0559917 100644
--- a/filter/filter_impl/generic_filter_test.go
+++ b/filter/filter_impl/generic_filter_test.go
@@ -20,6 +20,7 @@ package filter_impl
 import (
 	"reflect"
 	"testing"
+	"time"
 )
 
 import (
@@ -38,6 +39,8 @@ func TestStruct2MapAll(t *testing.T) {
 				Xx   string `m:"xx"`
 			} `m:"xxYy"`
 		} `m:"caCa"`
+		DaDa time.Time
+		EeEe int
 	}
 	testData.AaAa = "1"
 	testData.BaBa = "1"
@@ -45,6 +48,8 @@ func TestStruct2MapAll(t *testing.T) {
 	testData.CaCa.AaAa = "2"
 	testData.CaCa.XxYy.xxXx = "3"
 	testData.CaCa.XxYy.Xx = "3"
+	testData.DaDa = time.Date(2020, 10, 29, 2, 34, 0, 0, time.Local)
+	testData.EeEe = 100
 	m := struct2MapAll(testData).(map[string]interface{})
 	assert.Equal(t, "1", m["aaAa"].(string))
 	assert.Equal(t, "1", m["baBa"].(string))
@@ -53,6 +58,8 @@ func TestStruct2MapAll(t *testing.T) {
 
 	assert.Equal(t, reflect.Map, reflect.TypeOf(m["caCa"]).Kind())
 	assert.Equal(t, reflect.Map, reflect.TypeOf(m["caCa"].(map[string]interface{})["xxYy"]).Kind())
+	assert.Equal(t, "2020-10-29 02:34:00", m["daDa"].(time.Time).Format("2006-01-02 15:04:05"))
+	assert.Equal(t, 100, m["eeEe"].(int))
 }
 
 type testStruct struct {
diff --git a/go.mod b/go.mod
index 6e06e034404a20c2e8f00b302b856340a3fe72dd..a9ed0b574aa7f1c795ea3d7e912fa97646d9cf87 100644
--- a/go.mod
+++ b/go.mod
@@ -2,24 +2,24 @@ module github.com/apache/dubbo-go
 
 require (
 	github.com/NYTimes/gziphandler v1.1.1 // indirect
-	github.com/RoaringBitmap/roaring v0.4.23
-	github.com/Workiva/go-datastructures v1.0.50
+	github.com/RoaringBitmap/roaring v0.5.5
+	github.com/Workiva/go-datastructures v1.0.52
 	github.com/afex/hystrix-go v0.0.0-20180502004556-fa1af6a1f4f5
-	github.com/alibaba/sentinel-golang v0.6.1
+	github.com/alibaba/sentinel-golang v0.6.2
 	github.com/apache/dubbo-getty v1.3.10
 	github.com/apache/dubbo-go-hessian2 v1.7.0
 	github.com/coreos/etcd v3.3.25+incompatible
-	github.com/creasty/defaults v1.3.0
-	github.com/dubbogo/go-zookeeper v1.0.1
-	github.com/dubbogo/gost v1.9.1
+	github.com/creasty/defaults v1.5.1
+	github.com/dubbogo/go-zookeeper v1.0.2
+	github.com/dubbogo/gost v1.9.2
 	github.com/elazarl/go-bindata-assetfs v1.0.0 // indirect
 	github.com/emicklei/go-restful/v3 v3.0.0
 	github.com/frankban/quicktest v1.4.1 // indirect
 	github.com/fsnotify/fsnotify v1.4.7
 	github.com/go-co-op/gocron v0.1.1
-	github.com/go-resty/resty/v2 v2.1.0
-	github.com/golang/mock v1.3.1
-	github.com/golang/protobuf v1.4.0
+	github.com/go-resty/resty/v2 v2.3.0
+	github.com/golang/mock v1.4.4
+	github.com/golang/protobuf v1.4.3
 	github.com/grpc-ecosystem/grpc-opentracing v0.0.0-20180507213350-8e809c8a8645
 	github.com/hashicorp/consul v1.8.0
 	github.com/hashicorp/consul/api v1.5.0
@@ -28,19 +28,19 @@ require (
 	github.com/hashicorp/vault/sdk v0.1.14-0.20191112033314-390e96e22eb2
 	github.com/jinzhu/copier v0.0.0-20190625015134-976e0346caa8
 	github.com/magiconair/properties v1.8.1
-	github.com/mitchellh/mapstructure v1.2.3
+	github.com/mitchellh/mapstructure v1.3.3
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd
-	github.com/nacos-group/nacos-sdk-go v1.0.0
-	github.com/opentracing/opentracing-go v1.1.0
+	github.com/nacos-group/nacos-sdk-go v1.0.1
+	github.com/opentracing/opentracing-go v1.2.0
 	github.com/pierrec/lz4 v2.2.6+incompatible // indirect
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.1.0
 	github.com/satori/go.uuid v1.2.1-0.20181028125025-b2ce2384e17b
 	github.com/stretchr/objx v0.2.0 // indirect
-	github.com/stretchr/testify v1.5.1
-	github.com/zouyx/agollo/v3 v3.4.4
+	github.com/stretchr/testify v1.6.1
+	github.com/zouyx/agollo/v3 v3.4.5
 	go.uber.org/atomic v1.6.0
-	go.uber.org/zap v1.15.0
+	go.uber.org/zap v1.16.0
 	google.golang.org/grpc v1.26.0
 	gopkg.in/yaml.v2 v2.2.8
 	k8s.io/api v0.16.9
diff --git a/go.sum b/go.sum
index f35b6c58451a11fb721471d9b124bdaa21c1b857..87d8029a1cf88bdd55f9c126bd9e4dd502ad5cae 100644
--- a/go.sum
+++ b/go.sum
@@ -74,16 +74,16 @@ github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAE
 github.com/OpenDNS/vegadns2client v0.0.0-20180418235048-a3fa4a771d87/go.mod h1:iGLljf5n9GjT6kc0HBvyI1nOKnGQbNB66VzSNbK5iks=
 github.com/PuerkitoBio/purell v1.0.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/urlesc v0.0.0-20160726150825-5bd2802263f2/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
-github.com/RoaringBitmap/roaring v0.4.23 h1:gpyfd12QohbqhFO4NVDUdoPOCXsyahYRQhINmlHxKeo=
-github.com/RoaringBitmap/roaring v0.4.23/go.mod h1:D0gp8kJQgE1A4LQ5wFLggQEyvDi06Mq5mKs52e1TwOo=
+github.com/RoaringBitmap/roaring v0.5.5 h1:naNqvO1mNnghk2UvcsqnzHDBn9DRbCIRy94GmDTRVTQ=
+github.com/RoaringBitmap/roaring v0.5.5/go.mod h1:puNo5VdzwbaIQxSiDIwfXl4Hnc+fbovcX4IW/dSTtUk=
 github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
 github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6 h1:fLjPD/aNc3UIOA6tDi6QXUemppXK3P9BI7mr2hd6gx8=
 github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
 github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d h1:G0m3OIz70MZUWq3EgK3CesDbo8upS2Vm9/P3FtgI+Jk=
 github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
-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/Workiva/go-datastructures v1.0.52 h1:PLSK6pwn8mYdaoaCZEMsXBpBotr4HHn9abU0yMQt0NI=
+github.com/Workiva/go-datastructures v1.0.52/go.mod h1:Z+F2Rca0qCsVYDS8z7bAGm8f3UkzuWYS/oBZz5a7VVA=
 github.com/abdullin/seq v0.0.0-20160510034733-d5467c17e7af h1:DBNMBMuMiWYu0b+8KMJuWmfCkcxl09JwdlqwDZZ6U14=
 github.com/abdullin/seq v0.0.0-20160510034733-d5467c17e7af/go.mod h1:5Jv4cbFiHJMsVxt52+i0Ha45fjshj6wxYr1r19tB9bw=
 github.com/afex/hystrix-go v0.0.0-20180502004556-fa1af6a1f4f5 h1:rFw4nCn9iMW+Vajsk51NtYIcwSTkXr+JGrMd36kTDJw=
@@ -93,8 +93,8 @@ github.com/alangpierce/go-forceexport v0.0.0-20160317203124-8f1d6941cd75/go.mod
 github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7/go.mod h1:6zEj6s6u/ghQa61ZWa/C2Aw3RkjiTBOix7dkqa1VLIs=
 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=
-github.com/alibaba/sentinel-golang v0.6.1 h1:Pxyw2X7ryklvToF40KG9l4uuO90jRZA2MWb8Z3d1wPo=
-github.com/alibaba/sentinel-golang v0.6.1/go.mod h1:5jemKdyCQCKVf+quEia53fo9a17OSe+wnl9HX2NbNpc=
+github.com/alibaba/sentinel-golang v0.6.2 h1:1OjjpljJbNKWp9p5RJKxOqS1gHGZPUWPlCcokv5xYJs=
+github.com/alibaba/sentinel-golang v0.6.2/go.mod h1:5jemKdyCQCKVf+quEia53fo9a17OSe+wnl9HX2NbNpc=
 github.com/aliyun/alibaba-cloud-sdk-go v0.0.0-20190808125512-07798873deee/go.mod h1:myCDvQSzCW+wB1WAlocEru4wMGJxy+vlxHdhegi1CDQ=
 github.com/aliyun/alibaba-cloud-sdk-go v1.61.18 h1:zOVTBdCKFd9JbCKz9/nt+FovbjPFmb7mUnp8nH9fQBA=
 github.com/aliyun/alibaba-cloud-sdk-go v1.61.18/go.mod h1:v8ESoHo4SyHmuB4b1tJqDHxfTGEciD+yhvOU/5s1Rfk=
@@ -183,8 +183,8 @@ github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwc
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@@ -210,11 +210,11 @@ github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKoh
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@@ -294,8 +294,8 @@ github.com/go-openapi/swag v0.0.0-20160704191624-1d0bd113de87/go.mod h1:DXUve3Dp
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@@ -326,6 +326,8 @@ github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfb
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@@ -339,6 +341,8 @@ github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrU
 github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
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@@ -545,6 +549,8 @@ github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1
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@@ -594,6 +600,8 @@ github.com/mattn/go-colorable v0.1.2/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVc
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@@ -638,6 +646,8 @@ github.com/mitchellh/mapstructure v0.0.0-20160808181253-ca63d7c062ee/go.mod h1:F
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@@ -658,6 +668,8 @@ github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRW
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@@ -699,6 +711,8 @@ github.com/opencontainers/runtime-spec v0.1.2-0.20190507144316-5b71a03e2700/go.m
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@@ -819,8 +833,8 @@ github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
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@@ -831,6 +845,8 @@ github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UV
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@@ -878,8 +894,9 @@ github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2 h1:eY9dn8+vbi4tKz5
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 go.etcd.io/bbolt v1.3.4 h1:hi1bXHMVrlQh6WwxAy+qZCV/SYIlqo+Ushwdpa4tAKg=
 go.etcd.io/bbolt v1.3.4/go.mod h1:G5EMThwa9y8QZGBClrRx5EY+Yw9kAhnjy3bSjsnlVTQ=
@@ -904,6 +921,8 @@ go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
 go.uber.org/zap v1.13.0/go.mod h1:zwrFLgMcdUuIBviXEYEH1YKNaOBnKXsx2IPda5bBwHM=
 go.uber.org/zap v1.15.0 h1:ZZCA22JRF2gQE5FoNmhmrf7jeJJ2uhqDUNRYKm8dvmM=
 go.uber.org/zap v1.15.0/go.mod h1:Mb2vm2krFEG5DV0W9qcHBYFtp/Wku1cvYaqPsS/WYfc=
+go.uber.org/zap v1.16.0 h1:uFRZXykJGK9lLY4HtgSw44DnIcAM+kRBP7x5m+NpAOM=
+go.uber.org/zap v1.16.0/go.mod h1:MA8QOfq0BHJwdXa996Y4dYkAqRKB8/1K1QMMZVaNZjQ=
 golang.org/x/crypto v0.0.0-20180621125126-a49355c7e3f8/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
@@ -929,6 +948,8 @@ golang.org/x/crypto v0.0.0-20200302210943-78000ba7a073/go.mod h1:LzIPMQfyMNhhGPh
 golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37 h1:cg5LA/zNPRzIXIWSCxQW10Rvpy94aQh3LT/ShoCpkHw=
 golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 h1:psW17arqaxU48Z5kZ0CQnkZWQJsqcURM6tKiBApRjXI=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -947,6 +968,8 @@ golang.org/x/lint v0.0.0-20190930215403-16217165b5de h1:5hukYrvBGR8/eNkX5mdUezrA
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f h1:J5lckAjkw6qYlOZNj90mLYNTEKDvWeuc1yieZ8qUzUE=
 golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRuDixDT3tpyyb+LUpUlRWLxfhWrs=
+golang.org/x/lint v0.0.0-20200302205851-738671d3881b h1:Wh+f8QHJXR411sJR8/vRBTZ7YapZaRvUcLFFJhusH0k=
+golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
 golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
 golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
@@ -954,6 +977,8 @@ golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0 h1:KU7oHjnv3XNWfa5COkzUifxZmxp1TyI7ImMXqFxLwvQ=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.3.0 h1:RM4zey1++hCTbCVQfnWeKs9/IEsaBLA8vTkd0WVtmH4=
+golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20170114055629-f2499483f923/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180611182652-db08ff08e862/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -975,7 +1000,6 @@ golang.org/x/net v0.0.0-20190522155817-f3200d17e092/go.mod h1:HSz+uSET+XFnRR8LxR
 golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190923162816-aa69164e4478/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190930134127-c5a3c61f89f3/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -984,8 +1008,11 @@ golang.org/x/net v0.0.0-20191027093000-83d349e8ac1a/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b h1:0mm1VjtFUOIlE1SbDlwjYaDxZVDP2S5ou6y0gSgXHu8=
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20200513185701-a91f0712d120/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2 h1:eDrdRpKgkcCqKZQwyZRyeFZgfqt37SL7Kv3tok06cKE=
 golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
+golang.org/x/net v0.0.0-20200822124328-c89045814202 h1:VvcQYSHwXgi7W+TpUR6A9g6Up98WAHf3f/ulnJ62IyA=
+golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 h1:SVwTIAaPC2U/AvvLNZ2a7OVsmBpC8L5BlwK1whH3hm0=
@@ -997,6 +1024,8 @@ golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e h1:vcxGaoTs7kV8m5Np9uUNQin4BrLOthgV7252N8V+FwY=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208 h1:qwRHBd0NqMbJxfbotnDhm2ByMI1Shq4Y6oRJo21SGJA=
+golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20170830134202-bb24a47a89ea/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180622082034-63fc586f45fe/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -1084,12 +1113,17 @@ golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtn
 golang.org/x/tools v0.0.0-20191125144606-a911d9008d1f/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191216052735-49a3e744a425/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20191216173652-a0e659d51361/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
+golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200426102838-f3a5411a4c3b h1:zSzQJAznWxAh9fZxiPy2FZo+ZZEYoYFYYDYdOrU7AaM=
 golang.org/x/tools v0.0.0-20200426102838-f3a5411a4c3b/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20200928182047-19e03678916f h1:VwGa2Wf+rHGIxvsssCkUNIyFv8jQY0VCBCNWtikoWq0=
+golang.org/x/tools v0.0.0-20200928182047-19e03678916f/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/api v0.3.1/go.mod h1:6wY9I6uQWHQ8EM57III9mq/AjF+i8G65rmVagqKMtkk=
 google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
 google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
@@ -1139,6 +1173,8 @@ google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miE
 google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
 google.golang.org/protobuf v1.22.0 h1:cJv5/xdbk1NnMPR1VP9+HU6gupuG9MLBoH1r6RHZ2MY=
 google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.0 h1:4MY060fB1DLGMB/7MBTLnwQUY6+F09GEiz6SsrNqyzM=
+google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 gopkg.in/airbrake/gobrake.v2 v2.0.9/go.mod h1:/h5ZAUhDkGaJfjzjKLSjv6zCL6O0LLBxU4K+aSYdM/U=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/asn1-ber.v1 v1.0.0-20181015200546-f715ec2f112d/go.mod h1:cuepJuh7vyXfUyUwEgHQXw849cJrilpS5NeIjOWESAw=
@@ -1178,6 +1214,8 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
diff --git a/metadata/service/exporter/configurable/exporter.go b/metadata/service/exporter/configurable/exporter.go
index 5a930c5e953aead15e4673f1b9537197128a7b35..75e52d8d1b833f95d7f6f09a778bd916bd4afee9 100644
--- a/metadata/service/exporter/configurable/exporter.go
+++ b/metadata/service/exporter/configurable/exporter.go
@@ -19,6 +19,7 @@ package configurable
 
 import (
 	"context"
+	"errors"
 	"sync"
 )
 
@@ -46,12 +47,18 @@ func NewMetadataServiceExporter(metadataService service.MetadataService) exporte
 }
 
 // Export will export the metadataService
-func (exporter *MetadataServiceExporter) Export() error {
+func (exporter *MetadataServiceExporter) Export(url *common.URL) error {
 	if !exporter.IsExported() {
 		serviceConfig := config.NewServiceConfig(constant.SIMPLE_METADATA_SERVICE_NAME, context.Background())
 		serviceConfig.Protocol = constant.DEFAULT_PROTOCOL
+		if url == nil || url.SubURL == nil {
+			return errors.New("metadata server url is nil, pls check your configuration")
+		}
 		serviceConfig.Protocols = map[string]*config.ProtocolConfig{
-			constant.DEFAULT_PROTOCOL: generateMetadataProtocol(),
+			constant.DEFAULT_PROTOCOL: {
+				Name: url.SubURL.Protocol,
+				Port: url.SubURL.Port,
+			},
 		}
 		serviceConfig.InterfaceName = constant.METADATA_SERVICE_NAME
 		// identify this is a golang server
@@ -95,11 +102,3 @@ func (exporter *MetadataServiceExporter) IsExported() bool {
 	defer exporter.lock.RUnlock()
 	return exporter.ServiceConfig != nil && exporter.ServiceConfig.IsExport()
 }
-
-// generateMetadataProtocol will return a default ProtocolConfig
-func generateMetadataProtocol() *config.ProtocolConfig {
-	return &config.ProtocolConfig{
-		Name: constant.DEFAULT_PROTOCOL,
-		Port: "20000",
-	}
-}
diff --git a/metadata/service/exporter/configurable/exporter_test.go b/metadata/service/exporter/configurable/exporter_test.go
index b304b9153f92f1a7ab8176236fd9648e09f4366b..ceda2550e2e60ed2e587dabe92cca20831e708a6 100644
--- a/metadata/service/exporter/configurable/exporter_test.go
+++ b/metadata/service/exporter/configurable/exporter_test.go
@@ -26,6 +26,7 @@ import (
 )
 
 import (
+	"github.com/apache/dubbo-go/common"
 	_ "github.com/apache/dubbo-go/common/proxy/proxy_factory"
 	"github.com/apache/dubbo-go/config"
 	_ "github.com/apache/dubbo-go/filter/filter_impl"
@@ -55,12 +56,23 @@ func TestConfigurableExporter(t *testing.T) {
 	mockInitProviderWithSingleRegistry()
 	metadataService, _ := inmemory.NewMetadataService()
 	exported := NewMetadataServiceExporter(metadataService)
-	assert.Equal(t, false, exported.IsExported())
-	assert.NoError(t, exported.Export())
-	assert.Equal(t, true, exported.IsExported())
-	assert.Regexp(t, "dubbo://:20000/MetadataService*", exported.GetExportedURLs()[0].String())
-	exported.Unexport()
-	assert.Equal(t, false, exported.IsExported())
+
+	t.Run("configurableExporterUrlNil", func(t *testing.T) {
+		assert.Equal(t, false, exported.IsExported())
+		assert.Error(t, exported.Export(nil), "metadata server url is nil, pls check your configuration")
+	})
+
+	t.Run("configurableExporter", func(t *testing.T) {
+		registryURL, _ := common.NewURL("service-discovery://localhost:12345")
+		subURL, _ := common.NewURL("dubbo://localhost:20003")
+		registryURL.SubURL = &subURL
+		assert.Equal(t, false, exported.IsExported())
+		assert.NoError(t, exported.Export(&registryURL))
+		assert.Equal(t, true, exported.IsExported())
+		assert.Regexp(t, "dubbo://:20003/MetadataService*", exported.GetExportedURLs()[0].String())
+		exported.Unexport()
+		assert.Equal(t, false, exported.IsExported())
+	})
 }
 
 // mockInitProviderWithSingleRegistry will init a mocked providerConfig
diff --git a/metadata/service/exporter/exporter.go b/metadata/service/exporter/exporter.go
index cfdef3a0e79d29ce31717c0fc3c575e9e4ba1759..33ceaca467220d1c0e39225abb006485e026f961 100644
--- a/metadata/service/exporter/exporter.go
+++ b/metadata/service/exporter/exporter.go
@@ -23,7 +23,7 @@ import (
 
 // MetadataServiceExporter will export & unexport the metadata service,  get exported url, and return is exported or not
 type MetadataServiceExporter interface {
-	Export() error
+	Export(url *common.URL) error
 	Unexport()
 	GetExportedURLs() []*common.URL
 	IsExported() bool
diff --git a/protocol/dubbo/dubbo_invoker.go b/protocol/dubbo/dubbo_invoker.go
index bce33508bec92b706a1722c3bbc0ed0607e66643..e72ca28299727d9865664036016671670f5935a0 100644
--- a/protocol/dubbo/dubbo_invoker.go
+++ b/protocol/dubbo/dubbo_invoker.go
@@ -161,6 +161,10 @@ func (di *DubboInvoker) getTimeout(invocation *invocation_impl.RPCInvocation) ti
 	return di.timeout
 }
 
+func (di *DubboInvoker) IsAvailable() bool {
+	return di.client.IsAvailable()
+}
+
 // Destroy destroy dubbo client invoker.
 func (di *DubboInvoker) Destroy() {
 	di.quitOnce.Do(func() {
diff --git a/protocol/grpc/client.go b/protocol/grpc/client.go
index a0ab0be80cc905115e675c1c4dea2b1c748f6c09..9b31a8c626ab0cdec8404da6712d88376be28f2f 100644
--- a/protocol/grpc/client.go
+++ b/protocol/grpc/client.go
@@ -19,6 +19,7 @@ package grpc
 
 import (
 	"reflect"
+	"strconv"
 )
 
 import (
@@ -93,9 +94,13 @@ func NewClient(url common.URL) *Client {
 	// if global trace instance was set , it means trace function enabled. If not , will return Nooptracer
 	tracer := opentracing.GlobalTracer()
 	dailOpts := make([]grpc.DialOption, 0, 4)
+	maxMessageSize, _ := strconv.Atoi(url.GetParam(constant.MESSAGE_SIZE_KEY, "4"))
 	dailOpts = append(dailOpts, grpc.WithInsecure(), grpc.WithBlock(), grpc.WithUnaryInterceptor(
 		otgrpc.OpenTracingClientInterceptor(tracer, otgrpc.LogPayloads())),
-		grpc.WithDefaultCallOptions(grpc.CallContentSubtype(clientConf.ContentSubType)))
+		grpc.WithDefaultCallOptions(
+			grpc.CallContentSubtype(clientConf.ContentSubType),
+			grpc.MaxCallRecvMsgSize(1024*1024*maxMessageSize),
+			grpc.MaxCallSendMsgSize(1024*1024*maxMessageSize)))
 	conn, err := grpc.Dial(url.Location, dailOpts...)
 	if err != nil {
 		panic(err)
diff --git a/protocol/grpc/grpc_protocol.go b/protocol/grpc/grpc_protocol.go
index 68594a4b35921b6e3b1d59d404ed163025d57a81..396ff473f24f525c41bf117af9c12df3fbad1ebe 100644
--- a/protocol/grpc/grpc_protocol.go
+++ b/protocol/grpc/grpc_protocol.go
@@ -18,11 +18,13 @@
 package grpc
 
 import (
+	"strconv"
 	"sync"
 )
 
 import (
 	"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/logger"
 	"github.com/apache/dubbo-go/protocol"
@@ -76,7 +78,9 @@ func (gp *GrpcProtocol) openServer(url common.URL) {
 		gp.serverLock.Lock()
 		_, ok = gp.serverMap[url.Location]
 		if !ok {
+			grpcMessageSize, _ := strconv.Atoi(url.GetParam(constant.MESSAGE_SIZE_KEY, "4"))
 			srv := NewServer()
+			srv.SetBufferSize(grpcMessageSize)
 			gp.serverMap[url.Location] = srv
 			srv.Start(url)
 		}
diff --git a/protocol/grpc/protoc-gen-dubbo/plugin/dubbo/dubbo.go b/protocol/grpc/protoc-gen-dubbo/plugin/dubbo/dubbo.go
index 1af4fafdc606783e937ede63f99e5a08f0b2419e..a9f50e82879e1d6448300ec7b2a92e2a68070dc8 100644
--- a/protocol/grpc/protoc-gen-dubbo/plugin/dubbo/dubbo.go
+++ b/protocol/grpc/protoc-gen-dubbo/plugin/dubbo/dubbo.go
@@ -220,7 +220,23 @@ func (g *dubboGrpc) generateService(file *generator.FileDescriptor, service *pb.
 		g.P("},")
 	}
 	g.P("},")
-	g.P("Streams: []", grpcPkg, ".StreamDesc{},")
+	g.P("Streams: []", grpcPkg, ".StreamDesc{")
+	for i, method := range service.Method {
+		if !method.GetClientStreaming() && !method.GetServerStreaming() {
+			continue
+		}
+		g.P("{")
+		g.P("StreamName: ", strconv.Quote(method.GetName()), ",")
+		g.P("Handler: ", handlerNames[i], ",")
+		if method.GetServerStreaming() {
+			g.P("ServerStreams: true,")
+		}
+		if method.GetClientStreaming() {
+			g.P("ClientStreams: true,")
+		}
+		g.P("},")
+	}
+	g.P("},")
 	g.P("Metadata: \"", file.GetName(), "\",")
 	g.P("}")
 	g.P("}")
@@ -241,6 +257,7 @@ func (g *dubboGrpc) generateClientSignature(servName string, method *pb.MethodDe
 	respName := "out *" + g.typeName(method.GetOutputType())
 	if method.GetServerStreaming() || method.GetClientStreaming() {
 		respName = servName + "_" + generator.CamelCase(origMethName) + "Client"
+		return fmt.Sprintf("%s func(ctx %s.Context%s) (%s, error)", methName, contextPkg, reqArg, respName)
 	}
 	return fmt.Sprintf("%s func(ctx %s.Context%s, %s) error", methName, contextPkg, reqArg, respName)
 }
@@ -252,7 +269,6 @@ func (g *dubboGrpc) generateServerMethod(servName, fullServName string, method *
 	methName := generator.CamelCase(method.GetName())
 	hname := fmt.Sprintf("_DUBBO_%s_%s_Handler", servName, methName)
 	inType := g.typeName(method.GetInputType())
-	outType := g.typeName(method.GetOutputType())
 
 	if !method.GetServerStreaming() && !method.GetClientStreaming() {
 		g.P("func ", hname, "(srv interface{}, ctx ", contextPkg, ".Context, dec func(interface{}) error, interceptor ", grpcPkg, ".UnaryServerInterceptor) (interface{}, error) {")
@@ -286,6 +302,11 @@ func (g *dubboGrpc) generateServerMethod(servName, fullServName string, method *
 	}
 	streamType := unexport(servName) + methName + "Server"
 	g.P("func ", hname, "(srv interface{}, stream ", grpcPkg, ".ServerStream) error {")
+	g.P("_, ok := srv.(dgrpc.DubboGrpcService)")
+	g.P(`invo := invocation.NewRPCInvocation("`, methName, `", nil, nil)`)
+	g.P("if !ok {")
+	g.P("fmt.Println(invo)")
+	g.P("}")
 	if !method.GetClientStreaming() {
 		g.P("m := new(", inType, ")")
 		g.P("if err := stream.RecvMsg(m); err != nil { return err }")
@@ -296,50 +317,5 @@ func (g *dubboGrpc) generateServerMethod(servName, fullServName string, method *
 	g.P("}")
 	g.P()
 
-	genSend := method.GetServerStreaming()
-	genSendAndClose := !method.GetServerStreaming()
-	genRecv := method.GetClientStreaming()
-
-	// Stream auxiliary types and methods.
-	g.P("type ", servName, "_", methName, "Server interface {")
-	if genSend {
-		g.P("Send(*", outType, ") error")
-	}
-	if genSendAndClose {
-		g.P("SendAndClose(*", outType, ") error")
-	}
-	if genRecv {
-		g.P("Recv() (*", inType, ", error)")
-	}
-	g.P(grpcPkg, ".ServerStream")
-	g.P("}")
-	g.P()
-
-	g.P("type ", streamType, " struct {")
-	g.P(grpcPkg, ".ServerStream")
-	g.P("}")
-	g.P()
-
-	if genSend {
-		g.P("func (x *", streamType, ") Send(m *", outType, ") error {")
-		g.P("return x.ServerStream.SendMsg(m)")
-		g.P("}")
-		g.P()
-	}
-	if genSendAndClose {
-		g.P("func (x *", streamType, ") SendAndClose(m *", outType, ") error {")
-		g.P("return x.ServerStream.SendMsg(m)")
-		g.P("}")
-		g.P()
-	}
-	if genRecv {
-		g.P("func (x *", streamType, ") Recv() (*", inType, ", error) {")
-		g.P("m := new(", inType, ")")
-		g.P("if err := x.ServerStream.RecvMsg(m); err != nil { return nil, err }")
-		g.P("return m, nil")
-		g.P("}")
-		g.P()
-	}
-
 	return hname
 }
diff --git a/protocol/grpc/server.go b/protocol/grpc/server.go
index 2b7b1adddf573e3b84db32a11cfc286ff22a0276..30bdf77e77e478763a5cc6b1e81f021dd3573bc4 100644
--- a/protocol/grpc/server.go
+++ b/protocol/grpc/server.go
@@ -40,6 +40,7 @@ import (
 // Server is a gRPC server
 type Server struct {
 	grpcServer *grpc.Server
+	bufferSize int
 }
 
 // NewServer creates a new server
@@ -57,6 +58,10 @@ type DubboGrpcService interface {
 	ServiceDesc() *grpc.ServiceDesc
 }
 
+func (s *Server) SetBufferSize(n int) {
+	s.bufferSize = n
+}
+
 // Start gRPC server with @url
 func (s *Server) Start(url common.URL) {
 	var (
@@ -72,7 +77,9 @@ func (s *Server) Start(url common.URL) {
 	// if global trace instance was set, then server tracer instance can be get. If not , will return Nooptracer
 	tracer := opentracing.GlobalTracer()
 	server := grpc.NewServer(
-		grpc.UnaryInterceptor(otgrpc.OpenTracingServerInterceptor(tracer)))
+		grpc.UnaryInterceptor(otgrpc.OpenTracingServerInterceptor(tracer)),
+		grpc.MaxRecvMsgSize(1024*1024*s.bufferSize),
+		grpc.MaxSendMsgSize(1024*1024*s.bufferSize))
 
 	key := url.GetParam(constant.BEAN_NAME_KEY, "")
 	service := config.GetProviderService(key)
diff --git a/registry/base_registry.go b/registry/base_registry.go
index ad1a3b61741e003625612ad58409eb8615271a84..d6f5ceb91b1b46135d2da36418ac69fa71f53d48 100644
--- a/registry/base_registry.go
+++ b/registry/base_registry.go
@@ -29,7 +29,6 @@ import (
 )
 
 import (
-	gxnet "github.com/dubbogo/gost/net"
 	perrors "github.com/pkg/errors"
 )
 
@@ -53,7 +52,7 @@ var (
 
 func init() {
 	processID = fmt.Sprintf("%d", os.Getpid())
-	localIP, _ = gxnet.GetLocalIP()
+	localIP = common.GetLocalIp()
 }
 
 type createPathFunc func(dubboPath string) error
@@ -314,7 +313,7 @@ func (r *BaseRegistry) providerRegistry(c common.URL, params url.Values, f creat
 	// Dubbo java consumer to start looking for the provider url,because the category does not match,
 	// the provider will not find, causing the consumer can not start, so we use consumers.
 
-	if len(c.Methods) == 0 {
+	if len(c.Methods) != 0 {
 		params.Add(constant.METHODS_KEY, strings.Join(c.Methods, ","))
 	}
 	logger.Debugf("provider url params:%#v", params)
@@ -326,7 +325,16 @@ func (r *BaseRegistry) providerRegistry(c common.URL, params url.Values, f creat
 	}
 	host += ":" + c.Port
 
-	rawURL = fmt.Sprintf("%s://%s%s?%s", c.Protocol, host, c.Path, params.Encode())
+	//delete empty param key
+	for key, val := range params {
+		if len(val) > 0 && val[0] == "" {
+			params.Del(key)
+		}
+	}
+
+	s, _ := url.QueryUnescape(params.Encode())
+	rawURL = fmt.Sprintf("%s://%s%s?%s", c.Protocol, host, c.Path, s)
+
 	// Print your own registration service providers.
 	dubboPath = fmt.Sprintf("/dubbo/%s/%s", r.service(c), (common.RoleType(common.PROVIDER)).String())
 	logger.Debugf("provider path:%s, url:%s", dubboPath, rawURL)
@@ -361,7 +369,8 @@ func (r *BaseRegistry) consumerRegistry(c common.URL, params url.Values, f creat
 	}
 
 	params.Add("protocol", c.Protocol)
-	rawURL = fmt.Sprintf("consumer://%s%s?%s", localIP, c.Path, params.Encode())
+	s, _ := url.QueryUnescape(params.Encode())
+	rawURL = fmt.Sprintf("consumer://%s%s?%s", localIP, c.Path, s)
 	dubboPath = fmt.Sprintf("/dubbo/%s/%s", r.service(c), (common.RoleType(common.CONSUMER)).String())
 
 	logger.Debugf("consumer path:%s, url:%s", dubboPath, rawURL)
diff --git a/registry/consul/utils.go b/registry/consul/utils.go
index 05ac5e76e292a2b574bd5e661bbbcca4f419fc22..f5babf69d5970a495f8f0c23a254fe4b2a9ffbee 100644
--- a/registry/consul/utils.go
+++ b/registry/consul/utils.go
@@ -25,7 +25,6 @@ import (
 )
 
 import (
-	gxnet "github.com/dubbogo/gost/net"
 	consul "github.com/hashicorp/consul/api"
 	perrors "github.com/pkg/errors"
 )
@@ -47,7 +46,7 @@ func buildService(url common.URL) (*consul.AgentServiceRegistration, error) {
 
 	// address
 	if url.Ip == "" {
-		url.Ip, _ = gxnet.GetLocalIP()
+		url.Ip = common.GetLocalIp()
 	}
 
 	// port
diff --git a/registry/directory/directory.go b/registry/directory/directory.go
index ccd87c80b2d76b9d35c7a81d1c975d9bac3b30ee..009b279faab6db1296d0ed0863ea8e2c0877c191 100644
--- a/registry/directory/directory.go
+++ b/registry/directory/directory.go
@@ -25,7 +25,6 @@ import (
 )
 
 import (
-	gxnet "github.com/dubbogo/gost/net"
 	perrors "github.com/pkg/errors"
 	"go.uber.org/atomic"
 )
@@ -404,7 +403,7 @@ func (dir *RegistryDirectory) overrideUrl(targetUrl *common.URL) {
 
 func (dir *RegistryDirectory) getConsumerUrl(c *common.URL) *common.URL {
 	processID := fmt.Sprintf("%d", os.Getpid())
-	localIP, _ := gxnet.GetLocalIP()
+	localIP := common.GetLocalIp()
 
 	params := url.Values{}
 	c.RangeParams(func(key, value string) bool {
diff --git a/registry/etcdv3/registry.go b/registry/etcdv3/registry.go
index 9cbc4945605c2ac42242d7c0727e8cd487703c9c..f3cc379bd8e94b15b678f0ac1d5ed5b6c917da6a 100644
--- a/registry/etcdv3/registry.go
+++ b/registry/etcdv3/registry.go
@@ -91,7 +91,7 @@ func newETCDV3Registry(url *common.URL) (registry.Registry, error) {
 		r,
 		etcdv3.WithName(etcdv3.RegistryETCDV3Client),
 		etcdv3.WithTimeout(timeout),
-		etcdv3.WithEndpoints(url.Location),
+		etcdv3.WithEndpoints(strings.Split(url.Location, ",")...),
 	); err != nil {
 		return nil, err
 	}
diff --git a/registry/etcdv3/service_discovery.go b/registry/etcdv3/service_discovery.go
index dceaa99df8061c6f46baa52eb6f5cebe4477f120..e8d4aea9a42634896c3c30e5c6b527a935179873 100644
--- a/registry/etcdv3/service_discovery.go
+++ b/registry/etcdv3/service_discovery.go
@@ -19,6 +19,7 @@ package etcdv3
 
 import (
 	"fmt"
+	"strings"
 	"sync"
 	"time"
 )
@@ -313,7 +314,7 @@ func newEtcdV3ServiceDiscovery(name string) (registry.ServiceDiscovery, error) {
 	client := etcdv3.NewServiceDiscoveryClient(
 		etcdv3.WithName(etcdv3.RegistryETCDV3Client),
 		etcdv3.WithTimeout(timeout),
-		etcdv3.WithEndpoints(remoteConfig.Address),
+		etcdv3.WithEndpoints(strings.Split(remoteConfig.Address, ",")...),
 	)
 
 	descriptor := fmt.Sprintf("etcd-service-discovery[%s]", remoteConfig.Address)
diff --git a/registry/kubernetes/registry.go b/registry/kubernetes/registry.go
index 88895855689df42f2cd66ec158e6b8f2806ef6f0..c1e559e48dcc64972c9405e15405d7e6febcc845 100644
--- a/registry/kubernetes/registry.go
+++ b/registry/kubernetes/registry.go
@@ -27,7 +27,6 @@ import (
 
 import (
 	"github.com/apache/dubbo-getty"
-	"github.com/dubbogo/gost/net"
 	perrors "github.com/pkg/errors"
 	v1 "k8s.io/api/core/v1"
 )
@@ -54,7 +53,7 @@ const (
 
 func init() {
 	processID = fmt.Sprintf("%d", os.Getpid())
-	localIP, _ = gxnet.GetLocalIP()
+	localIP = common.GetLocalIp()
 	extension.SetRegistry(Name, newKubernetesRegistry)
 }
 
diff --git a/registry/nacos/registry.go b/registry/nacos/registry.go
index 757474455b7e5df6e5fb454228cdcb551b6a3a0e..51428864fbe45aac6257d7fc1f68abcf53f638f1 100644
--- a/registry/nacos/registry.go
+++ b/registry/nacos/registry.go
@@ -26,7 +26,6 @@ import (
 )
 
 import (
-	gxnet "github.com/dubbogo/gost/net"
 	"github.com/nacos-group/nacos-sdk-go/clients"
 	"github.com/nacos-group/nacos-sdk-go/clients/naming_client"
 	nacosConstant "github.com/nacos-group/nacos-sdk-go/common/constant"
@@ -52,7 +51,7 @@ const (
 )
 
 func init() {
-	localIP, _ = gxnet.GetLocalIP()
+	localIP = common.GetLocalIp()
 	extension.SetRegistry(constant.NACOS_KEY, newNacosRegistry)
 }
 
diff --git a/registry/servicediscovery/service_discovery_registry.go b/registry/servicediscovery/service_discovery_registry.go
index 7576804eb563e16a043f63f17db2532f48c878f1..4db2c5aad438784b1289b4473aa8d23c4f8d923f 100644
--- a/registry/servicediscovery/service_discovery_registry.go
+++ b/registry/servicediscovery/service_discovery_registry.go
@@ -75,7 +75,7 @@ type serviceDiscoveryRegistry struct {
 
 func newServiceDiscoveryRegistry(url *common.URL) (registry.Registry, error) {
 
-	tryInitMetadataService()
+	tryInitMetadataService(url)
 
 	serviceDiscovery, err := creatServiceDiscovery(url)
 	if err != nil {
@@ -642,7 +642,7 @@ var (
 
 // tryInitMetadataService will try to initialize metadata service
 // TODO (move to somewhere)
-func tryInitMetadataService() {
+func tryInitMetadataService(url *common.URL) {
 
 	ms, err := extension.GetMetadataService(config.GetApplicationConfig().MetadataType)
 	if err != nil {
@@ -662,7 +662,7 @@ func tryInitMetadataService() {
 
 	expt := configurable.NewMetadataServiceExporter(ms)
 
-	err = expt.Export()
+	err = expt.Export(url)
 	if err != nil {
 		logger.Errorf("could not export the metadata service", err)
 	}
diff --git a/remoting/etcdv3/facade.go b/remoting/etcdv3/facade.go
index 52b1cce3e4618e9c2669e7a3b37256ebe6d61c41..614ba9ae3a1407daea2d9d534a0474a28ad8cac9 100644
--- a/remoting/etcdv3/facade.go
+++ b/remoting/etcdv3/facade.go
@@ -63,7 +63,7 @@ LOOP:
 			r.ClientLock().Lock()
 			clientName := RegistryETCDV3Client
 			timeout, _ := time.ParseDuration(r.GetUrl().GetParam(constant.REGISTRY_TIMEOUT_KEY, constant.DEFAULT_REG_TIMEOUT))
-			endpoint := r.GetUrl().Location
+			endpoints := r.Client().endpoints
 			r.Client().Close()
 			r.SetClient(nil)
 			r.ClientLock().Unlock()
@@ -80,11 +80,11 @@ LOOP:
 				err = ValidateClient(
 					r,
 					WithName(clientName),
-					WithEndpoints(endpoint),
+					WithEndpoints(endpoints...),
 					WithTimeout(timeout),
 				)
 				logger.Infof("ETCDV3ProviderRegistry.validateETCDV3Client(etcd Addr{%s}) = error{%#v}",
-					endpoint, perrors.WithStack(err))
+					endpoints, perrors.WithStack(err))
 				if err == nil && r.RestartCallBack() {
 					break
 				}
diff --git a/remoting/exchange_client.go b/remoting/exchange_client.go
index efcfca55868e7042b685adb5fb2452dd2d3a65c0..26fa5d5740e72c69d1a712146b6e1b0424885c21 100644
--- a/remoting/exchange_client.go
+++ b/remoting/exchange_client.go
@@ -47,6 +47,8 @@ type Client interface {
 	Close()
 	// send request to server.
 	Request(request *Request, timeout time.Duration, response *PendingResponse) error
+	// check if the client is still available
+	IsAvailable() bool
 }
 
 // This is abstraction level. it is like facade.
@@ -180,6 +182,13 @@ func (client *ExchangeClient) Send(invocation *protocol.Invocation, url common.U
 // close client
 func (client *ExchangeClient) Close() {
 	client.client.Close()
+	// for reinit client
+	client.init = false
+}
+
+// IsAvailable to check if the underlying network client is available yet.
+func (client *ExchangeClient) IsAvailable() bool {
+	return client.client.IsAvailable()
 }
 
 // handle the response from server
diff --git a/remoting/getty/getty_client.go b/remoting/getty/getty_client.go
index 6af3971f5c1f9ff5b0fafbc00ae2ba3f44eb34b5..7edc1cf8c59f86a3f89c623b4ed02b6b0a0495ec 100644
--- a/remoting/getty/getty_client.go
+++ b/remoting/getty/getty_client.go
@@ -204,6 +204,14 @@ func (c *Client) Request(request *remoting.Request, timeout time.Duration, respo
 	return perrors.WithStack(err)
 }
 
+// isAvailable returns true if the connection is available, or it can be re-established.
+func (c *Client) IsAvailable() bool {
+	client, _, err := c.selectSession(c.addr)
+	return err == nil &&
+		// defensive check
+		client != nil
+}
+
 func (c *Client) selectSession(addr string) (*gettyRPCClient, getty.Session, error) {
 	rpcClient, err := c.pool.getGettyRpcClient(addr)
 	if err != nil {
diff --git a/remoting/getty/pool.go b/remoting/getty/pool.go
index 8ceb673aa9ef714d9189355a16de03628269b04c..9689175bcf9838de595f292779b099ae9615d8e8 100644
--- a/remoting/getty/pool.go
+++ b/remoting/getty/pool.go
@@ -392,6 +392,7 @@ func (p *gettyRPCClientPool) get() (*gettyRPCClient, error) {
 		if d := now - conn.getActive(); d > p.ttl {
 			p.remove(conn)
 			go conn.close()
+			num = len(p.conns)
 			continue
 		}
 		conn.updateActive(now) //update active time
diff --git a/remoting/getty/pool_test.go b/remoting/getty/pool_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..1115a490428da14a72f5c40e1b98b2a7fb3f80ad
--- /dev/null
+++ b/remoting/getty/pool_test.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 getty
+
+import (
+	"testing"
+	"time"
+)
+
+import (
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetConnFromPool(t *testing.T) {
+	var rpcClient Client
+
+	clientPoll := newGettyRPCClientConnPool(&rpcClient, 1, time.Duration(5*time.Second))
+
+	var conn1 gettyRPCClient
+	conn1.active = time.Now().Unix()
+	clientPoll.put(&conn1)
+	assert.Equal(t, 1, len(clientPoll.conns))
+
+	var conn2 gettyRPCClient
+	conn2.active = time.Now().Unix()
+	clientPoll.put(&conn2)
+	assert.Equal(t, 1, len(clientPoll.conns))
+	conn, err := clientPoll.get()
+	assert.Nil(t, err)
+	assert.Equal(t, &conn1, conn)
+	time.Sleep(6 * time.Second)
+	conn, err = clientPoll.get()
+	assert.Nil(t, conn)
+	assert.Nil(t, err)
+	assert.Equal(t, 0, len(clientPoll.conns))
+}
diff --git a/remoting/zookeeper/listener.go b/remoting/zookeeper/listener.go
index b6c6d78106a5a97ec94e621d2e664185a8216656..e5ddcadeaca9c3ce972cbe781413ebec7393afce 100644
--- a/remoting/zookeeper/listener.go
+++ b/remoting/zookeeper/listener.go
@@ -301,6 +301,9 @@ func (l *ZkEventListener) listenDirEvent(conf *common.URL, zkPath string, listen
 			go func(zkPath string, listener remoting.DataListener) {
 				if l.listenServiceNodeEvent(zkPath) {
 					listener.DataChange(remoting.Event{Path: zkPath, Action: remoting.EventTypeDel})
+					l.pathMapLock.Lock()
+					defer l.pathMapLock.Unlock()
+					delete(l.pathMap, zkPath)
 				}
 				logger.Warnf("listenSelf(zk path{%s}) goroutine exit now", zkPath)
 			}(dubboPath, listener)