diff --git a/apm-checkstyle/pom.xml b/apm-checkstyle/pom.xml
index 90154638c..7b19433f0 100644
--- a/apm-checkstyle/pom.xml
+++ b/apm-checkstyle/pom.xml
@@ -22,6 +22,7 @@
         <groupId>org.apache</groupId>
         <artifactId>apache</artifactId>
         <version>19</version>
+        <relativePath/>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/apm-commons/apm-util/pom.xml b/apm-commons/apm-util/pom.xml
index 3aec7b616..7c0a17545 100644
--- a/apm-commons/apm-util/pom.xml
+++ b/apm-commons/apm-util/pom.xml
@@ -16,7 +16,8 @@
   ~
   -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <parent>
         <artifactId>apm-commons</artifactId>
         <groupId>org.apache.skywalking</groupId>
diff --git a/apm-sniffer/apm-agent-core/pom.xml b/apm-sniffer/apm-agent-core/pom.xml
index 5ee6327fd..5c68d0cc0 100644
--- a/apm-sniffer/apm-agent-core/pom.xml
+++ b/apm-sniffer/apm-agent-core/pom.xml
@@ -246,13 +246,13 @@
                         <configuration>
                             <target>
                                 <echo message="unjar" />
-                                <unzip src="${project.build.directory}/${artifactId}-${version}.jar" dest="${project.build.directory}/unpacked/" />
+                                <unzip src="${project.build.directory}/${project.artifactId}-${project.version}.jar" dest="${project.build.directory}/unpacked/" />
                                 <echo message="rename service providers in META-INF/services" />
                                 <move file="${project.build.directory}/unpacked/META-INF/native/libnetty_tcnative_osx_x86_64.jnilib" tofile="${project.build.directory}/unpacked/META-INF/native/liborg_apache_skywalking_apm_dependencies_netty_tcnative_osx_x86_64.jnilib" />
                                 <move file="${project.build.directory}/unpacked/META-INF/native/libnetty_tcnative_linux_x86_64.so" tofile="${project.build.directory}/unpacked/META-INF/native/liborg_apache_skywalking_apm_dependencies_netty_tcnative_linux_x86_64.so" />
                                 <move file="${project.build.directory}/unpacked/META-INF/native/netty_tcnative_windows_x86_64.dll" tofile="${project.build.directory}/unpacked/META-INF/native/org_apache_skywalking_apm_dependencies_netty_tcnative_windows_x86_64.dll" />
                                 <echo message="jar back" />
-                                <jar destfile="${project.build.directory}/${artifactId}-${version}.jar" basedir="${project.build.directory}/unpacked" />
+                                <jar destfile="${project.build.directory}/${project.artifactId}-${project.version}.jar" basedir="${project.build.directory}/unpacked" />
                             </target>
                         </configuration>
                         <goals>
diff --git a/apm-sniffer/apm-sdk-plugin/mysql-5.x-plugin/pom.xml b/apm-sniffer/apm-sdk-plugin/mysql-5.x-plugin/pom.xml
index ce5059092..859dd3689 100755
--- a/apm-sniffer/apm-sdk-plugin/mysql-5.x-plugin/pom.xml
+++ b/apm-sniffer/apm-sdk-plugin/mysql-5.x-plugin/pom.xml
@@ -16,7 +16,8 @@
   ~
   -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <parent>
         <artifactId>apm-sdk-plugin</artifactId>
         <groupId>org.apache.skywalking</groupId>
@@ -36,12 +37,6 @@
     </properties>
 
     <dependencies>
-        <dependency>
-            <groupId>mysql</groupId>
-            <artifactId>mysql-connector-java</artifactId>
-            <version>${mysql-connector-java.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
diff --git a/apm-sniffer/apm-sdk-plugin/mysql-6.x-plugin/pom.xml b/apm-sniffer/apm-sdk-plugin/mysql-6.x-plugin/pom.xml
index 639ce24f0..fe2220d16 100755
--- a/apm-sniffer/apm-sdk-plugin/mysql-6.x-plugin/pom.xml
+++ b/apm-sniffer/apm-sdk-plugin/mysql-6.x-plugin/pom.xml
@@ -16,7 +16,8 @@
   ~
   -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <parent>
         <artifactId>apm-sdk-plugin</artifactId>
         <groupId>org.apache.skywalking</groupId>
@@ -36,12 +37,6 @@
     </properties>
 
     <dependencies>
-        <dependency>
-            <groupId>mysql</groupId>
-            <artifactId>mysql-connector-java</artifactId>
-            <version>${mysql-connector-java.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
diff --git a/apm-sniffer/apm-sdk-plugin/mysql-8.x-plugin/pom.xml b/apm-sniffer/apm-sdk-plugin/mysql-8.x-plugin/pom.xml
index ac8f4efc4..611c63f78 100755
--- a/apm-sniffer/apm-sdk-plugin/mysql-8.x-plugin/pom.xml
+++ b/apm-sniffer/apm-sdk-plugin/mysql-8.x-plugin/pom.xml
@@ -16,7 +16,8 @@
   ~
   -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <parent>
         <artifactId>apm-sdk-plugin</artifactId>
         <groupId>org.apache.skywalking</groupId>
@@ -36,12 +37,6 @@
     </properties>
 
     <dependencies>
-        <dependency>
-            <groupId>mysql</groupId>
-            <artifactId>mysql-connector-java</artifactId>
-            <version>${mysql-connector-java.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
diff --git a/oap-server/server-receiver-plugin/zipkin-receiver-plugin/pom.xml b/oap-server/server-receiver-plugin/zipkin-receiver-plugin/pom.xml
index e6d571f9d..d2adbc1fa 100644
--- a/oap-server/server-receiver-plugin/zipkin-receiver-plugin/pom.xml
+++ b/oap-server/server-receiver-plugin/zipkin-receiver-plugin/pom.xml
@@ -17,7 +17,8 @@
   ~
   -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <parent>
         <artifactId>server-receiver-plugin</artifactId>
         <groupId>org.apache.skywalking</groupId>
@@ -47,9 +48,5 @@
             <groupId>io.zipkin.zipkin2</groupId>
             <artifactId>zipkin</artifactId>
         </dependency>
-        <dependency>
-            <groupId>com.github.ben-manes.caffeine</groupId>
-            <artifactId>caffeine</artifactId>
-        </dependency>
     </dependencies>
 </project>
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 0c3ebb95b..181f86fe5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -29,6 +29,7 @@
         <groupId>org.apache</groupId>
         <artifactId>apache</artifactId>
         <version>21</version>
+        <relativePath/>
     </parent>
 
     <modules>
@@ -217,6 +218,7 @@
                 <plugin>
                     <groupId>org.codehaus.mojo</groupId>
                     <artifactId>exec-maven-plugin</artifactId>
+                    <version>${exec-maven-plugin.version}</version>
                     <executions>
                         <execution>
                             <id>git submodule update</id>
@@ -244,11 +246,6 @@
                     <artifactId>maven</artifactId>
                     <version>${takari-maven-plugin.version}</version>
                 </plugin>
-                <plugin>
-                    <groupId>org.codehaus.mojo</groupId>
-                    <artifactId>exec-maven-plugin</artifactId>
-                    <version>${exec-maven-plugin.version}</version>
-                </plugin>
                 <plugin>
                     <artifactId>maven-antrun-plugin</artifactId>
                     <version>${maven-antrun-plugin.version}</version>