diff --git a/build.gradle b/build.gradle
index a4571bb32..ab2b2849a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -37,15 +37,15 @@ ext {
 // check.dependsOn integrationTest
 // integrationTest.mustRunAfter test
 allprojects {
-    group = 'org.fisco-bcos'
+    group = 'org.fisco-bcos.java-sdk'
     version = '1.0.0-SNAPSHOT'
     apply plugin: 'maven'
     apply plugin: 'maven-publish'
-    apply plugin: 'signing'
     apply plugin: 'idea'
     apply plugin: 'eclipse'
     apply plugin: 'java'
     apply plugin: 'jacoco'
+    apply plugin: 'signing'
 
     configurations.all {
         resolutionStrategy.cacheChangingModulesFor 30, 'seconds'
diff --git a/sdk-abi/build.gradle b/sdk-abi/build.gradle
index f976a9657..f6c20be3b 100644
--- a/sdk-abi/build.gradle
+++ b/sdk-abi/build.gradle
@@ -6,3 +6,46 @@ dependencies {
     compile project(':sdk-crypto')
     compile ("org.apache.commons:commons-lang3:${commonsLang3Version}")
 }
+
+uploadArchives {
+    repositories {
+        mavenDeployer {
+            beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }
+
+            repository(url: "https://oss.sonatype.org/service/local/staging/deploy/maven2/") {
+                authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
+
+            snapshotRepository(url: "https://oss.sonatype.org/content/repositories/snapshots/") {
+                authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
+
+            pom.project {
+                name project.name
+                packaging 'jar'
+                description = 'fisco-bcos java-sdk'
+                url = 'http://www.fisco-bcos.org'
+
+                scm {
+                    connection = 'https://github.com/FISCO-BCOS/java-sdk.git'
+                    url = 'https://github.com/FISCO-BCOS/java-sdk.git'
+                }
+
+                licenses {
+                    license {
+                        name = 'The Apache License, Version 2.0'
+                        url = 'http://www.apache.org/licenses/LICENSE-2.0.txt'
+                    }
+                }
+
+                developers {
+                    developer {
+                        id = 'zhangsan'
+                        name = 'zhangsan'
+                        email = 'zhangsan@example.com'
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/sdk-amop/build.gradle b/sdk-amop/build.gradle
index 7408e3c3e..fabecace9 100644
--- a/sdk-amop/build.gradle
+++ b/sdk-amop/build.gradle
@@ -7,3 +7,45 @@ dependencies {
     compile project(':sdk-crypto')
     compile ("com.fasterxml.jackson.core:jackson-databind:${jacksonVersion}")
 }
+uploadArchives {
+    repositories {
+        mavenDeployer {
+            beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }
+
+            repository(url: "https://oss.sonatype.org/service/local/staging/deploy/maven2/") {
+                authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
+
+            snapshotRepository(url: "https://oss.sonatype.org/content/repositories/snapshots/") {
+			    authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
+
+            pom.project {
+                name project.name
+                packaging 'jar'
+                description = 'fisco-bcos java-sdk'
+                url = 'http://www.fisco-bcos.org'
+
+                scm {
+                    connection = 'https://github.com/FISCO-BCOS/java-sdk.git'
+                    url = 'https://github.com/FISCO-BCOS/java-sdk.git'
+                }
+
+                licenses {
+                    license {
+                        name = 'The Apache License, Version 2.0'
+                        url = 'http://www.apache.org/licenses/LICENSE-2.0.txt'
+                    }
+                }
+
+                developers {
+                    developer {
+                        id = 'zhangsan'
+                        name = 'zhangsan'
+                        email = 'zhangsan@example.com'
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/sdk-codegen/build.gradle b/sdk-codegen/build.gradle
index d0f851983..73962b2b6 100644
--- a/sdk-codegen/build.gradle
+++ b/sdk-codegen/build.gradle
@@ -1,16 +1,53 @@
 // Apply the java-library plugin to add support for Java Library
 plugins {
-    id 'maven'
-    id 'maven-publish'
-    id 'signing'
-    id 'idea'
-    id 'eclipse'
     id 'java'
-    id 'jacoco'
 }
 dependencies {
     compile project(':sdk-transaction')
     compile ("com.fasterxml.jackson.core:jackson-databind:${jacksonVersion}")
     compile ("com.squareup:javapoet:${javapoetVersion}")
     compile ("info.picocli:picocli:${picocliVersion}")
-}
\ No newline at end of file
+}
+
+uploadArchives {
+    repositories {
+        mavenDeployer {
+            beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }
+
+            repository(url: "https://oss.sonatype.org/service/local/staging/deploy/maven2/") {
+                authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
+
+            snapshotRepository(url: "https://oss.sonatype.org/content/repositories/snapshots/") {
+                authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
+
+            pom.project {
+                name project.name
+                packaging 'jar'
+                description = 'fisco-bcos java-sdk'
+                url = 'http://www.fisco-bcos.org'
+
+                scm {
+                    connection = 'https://github.com/FISCO-BCOS/java-sdk.git'
+                    url = 'https://github.com/FISCO-BCOS/java-sdk.git'
+                }
+
+                licenses {
+                    license {
+                        name = 'The Apache License, Version 2.0'
+                        url = 'http://www.apache.org/licenses/LICENSE-2.0.txt'
+                    }
+                }
+
+                developers {
+                    developer {
+                        id = 'zhangsan'
+                        name = 'zhangsan'
+                        email = 'zhangsan@example.com'
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/sdk-core/build.gradle b/sdk-core/build.gradle
index 42583d5f5..2d77a2885 100644
--- a/sdk-core/build.gradle
+++ b/sdk-core/build.gradle
@@ -9,3 +9,45 @@ dependencies {
     compile ("com.fasterxml.jackson.core:jackson-databind:${jacksonVersion}")
     compile ("com.moandjiezana.toml:toml4j:${toml4jVersion}")
 }
+uploadArchives {
+    repositories {
+        mavenDeployer {
+            beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }
+
+            repository(url: "https://oss.sonatype.org/service/local/staging/deploy/maven2/") {
+                authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
+
+            snapshotRepository(url: "https://oss.sonatype.org/content/repositories/snapshots/") {
+                authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
+
+            pom.project {
+                name project.name
+                packaging 'jar'
+                description = 'fisco-bcos java-sdk'
+                url = 'http://www.fisco-bcos.org'
+
+                scm {
+                    connection = 'https://github.com/FISCO-BCOS/java-sdk.git'
+                    url = 'https://github.com/FISCO-BCOS/java-sdk.git'
+                }
+
+                licenses {
+                    license {
+                        name = 'The Apache License, Version 2.0'
+                        url = 'http://www.apache.org/licenses/LICENSE-2.0.txt'
+                    }
+                }
+
+                developers {
+                    developer {
+                        id = 'zhangsan'
+                        name = 'zhangsan'
+                        email = 'zhangsan@example.com'
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/sdk-core/src/main/java/org/fisco/bcos/sdk/channel/ChannelImp.java b/sdk-core/src/main/java/org/fisco/bcos/sdk/channel/ChannelImp.java
index e78756282..57a709447 100644
--- a/sdk-core/src/main/java/org/fisco/bcos/sdk/channel/ChannelImp.java
+++ b/sdk-core/src/main/java/org/fisco/bcos/sdk/channel/ChannelImp.java
@@ -356,13 +356,17 @@ public List<String> getAvailablePeer() {
     }
 
     private void broadcastHeartbeat() {
-        msgHandler
-                .getAvailablePeer()
-                .forEach(
-                        (peer, ctx) -> {
-                            sendHeartbeatMessage(ctx);
-                            logger.trace("broadcastHeartbeat to {} success ", peer);
-                        });
+        try {
+            msgHandler
+                    .getAvailablePeer()
+                    .forEach(
+                            (peer, ctx) -> {
+                                sendHeartbeatMessage(ctx);
+                                logger.trace("broadcastHeartbeat to {} success ", peer);
+                            });
+        } catch (Exception e) {
+            logger.error("broadcastHeartbeat failed, error info: {}", e.getMessage());
+        }
     }
 
     public void sendHeartbeatMessage(ChannelHandlerContext ctx) {
diff --git a/sdk-crypto/build.gradle b/sdk-crypto/build.gradle
index f2907ebdb..8d0c26c59 100644
--- a/sdk-crypto/build.gradle
+++ b/sdk-crypto/build.gradle
@@ -7,3 +7,46 @@ dependencies {
     compile ("org.bouncycastle:bcprov-jdk15on:${bcprovJDK15onVersion}")
     compile ("com.webank:key-mini-toolkit:${keyMiniToolkit}")
 }
+
+uploadArchives {
+    repositories {
+        mavenDeployer {
+            //beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }
+
+            repository(url: "https://oss.sonatype.org/service/local/staging/deploy/maven2/") {
+                authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
+
+            snapshotRepository(url: "https://oss.sonatype.org/content/repositories/snapshots/") {
+			    authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
+
+            pom.project {
+                name project.name
+                packaging 'jar'
+                description = 'fisco-bcos java-sdk'
+                url = 'http://www.fisco-bcos.org'
+
+                scm {
+                    connection = 'https://github.com/FISCO-BCOS/java-sdk.git'
+                    url = 'https://github.com/FISCO-BCOS/java-sdk.git'
+                }
+
+                licenses {
+                    license {
+                        name = 'The Apache License, Version 2.0'
+                        url = 'http://www.apache.org/licenses/LICENSE-2.0.txt'
+                    }
+                }
+
+                developers {
+                    developer {
+                        id = 'zhangsan'
+                        name = 'zhangsan'
+                        email = 'zhangsan@example.com'
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/sdk-service/build.gradle b/sdk-service/build.gradle
index 40a3416be..34bcf561e 100644
--- a/sdk-service/build.gradle
+++ b/sdk-service/build.gradle
@@ -7,3 +7,47 @@ dependencies {
     compile project(':sdk-abi')
     compile ("com.fasterxml.jackson.core:jackson-databind:${jacksonVersion}")
 }
+
+uploadArchives {
+    repositories {
+        mavenDeployer {
+            //beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }
+
+            repository(url: "https://oss.sonatype.org/service/local/staging/deploy/maven2/") {
+                authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
+
+            snapshotRepository(url: "https://oss.sonatype.org/content/repositories/snapshots/") {
+			    authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
+
+            pom.project {
+                name project.name
+                packaging 'jar'
+                description = 'fisco-bcos java-sdk'
+                url = 'http://www.fisco-bcos.org'
+
+                scm {
+                    connection = 'https://github.com/FISCO-BCOS/java-sdk.git'
+                    url = 'https://github.com/FISCO-BCOS/java-sdk.git'
+                }
+
+                licenses {
+                    license {
+                        name = 'The Apache License, Version 2.0'
+                        url = 'http://www.apache.org/licenses/LICENSE-2.0.txt'
+                    }
+                }
+
+                developers {
+                    developer {
+                        id = 'zhangsan'
+                        name = 'zhangsan'
+                        email = 'zhangsan@example.com'
+                    }
+                }
+            }
+        }
+    }
+}
+
diff --git a/sdk-transaction/build.gradle b/sdk-transaction/build.gradle
index 71754d435..6a7a0b186 100644
--- a/sdk-transaction/build.gradle
+++ b/sdk-transaction/build.gradle
@@ -8,3 +8,45 @@ dependencies {
 	compile ("commons-io:commons-io:${commonsIOVersion}")
     compile ("com.fasterxml.jackson.core:jackson-databind:${jacksonVersion}")
 }
+uploadArchives {
+    repositories {
+        mavenDeployer {
+            beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }
+
+            repository(url: "https://oss.sonatype.org/service/local/staging/deploy/maven2/") {
+                authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
+
+            snapshotRepository(url: "https://oss.sonatype.org/content/repositories/snapshots/") {
+                authentication(userName: ossrhUsername, password: ossrhPassword)
+            }
+
+            pom.project {
+                name project.name
+                packaging 'jar'
+                description = 'fisco-bcos java-sdk'
+                url = 'http://www.fisco-bcos.org'
+
+                scm {
+                    connection = 'https://github.com/FISCO-BCOS/java-sdk.git'
+                    url = 'https://github.com/FISCO-BCOS/java-sdk.git'
+                }
+
+                licenses {
+                    license {
+                        name = 'The Apache License, Version 2.0'
+                        url = 'http://www.apache.org/licenses/LICENSE-2.0.txt'
+                    }
+                }
+
+                developers {
+                    developer {
+                        id = 'zhangsan'
+                        name = 'zhangsan'
+                        email = 'zhangsan@example.com'
+                    }
+                }
+            }
+        }
+    }
+}