diff --git a/distributedlog-benchmark/pom.xml b/distributedlog-benchmark/pom.xml
index 3c16d59..9438dd9 100644
--- a/distributedlog-benchmark/pom.xml
+++ b/distributedlog-benchmark/pom.xml
@@ -15,8 +15,7 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 -->
-<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/maven-v4_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/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>org.apache.distributedlog</groupId>
diff --git a/distributedlog-build-tools/pom.xml b/distributedlog-build-tools/pom.xml
index 3c259a2..9517ef2 100644
--- a/distributedlog-build-tools/pom.xml
+++ b/distributedlog-build-tools/pom.xml
@@ -15,8 +15,7 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 -->
-<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/maven-v4_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/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>org.apache.distributedlog</groupId>
diff --git a/distributedlog-client/pom.xml b/distributedlog-client/pom.xml
index d8cc4e5..5141a12 100644
--- a/distributedlog-client/pom.xml
+++ b/distributedlog-client/pom.xml
@@ -15,8 +15,7 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 -->
-<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/maven-v4_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/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>org.apache.distributedlog</groupId>
diff --git a/distributedlog-core/pom.xml b/distributedlog-core/pom.xml
index b716720..64edaab 100644
--- a/distributedlog-core/pom.xml
+++ b/distributedlog-core/pom.xml
@@ -15,8 +15,7 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 -->
-<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/maven-v4_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/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>org.apache.distributedlog</groupId>
diff --git a/distributedlog-protocol/pom.xml b/distributedlog-protocol/pom.xml
index ef04acb..3083209 100644
--- a/distributedlog-protocol/pom.xml
+++ b/distributedlog-protocol/pom.xml
@@ -15,8 +15,7 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 -->
-<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/maven-v4_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/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>org.apache.distributedlog</groupId>
diff --git a/distributedlog-service/pom.xml b/distributedlog-service/pom.xml
index bc10cc2..1df3bd4 100644
--- a/distributedlog-service/pom.xml
+++ b/distributedlog-service/pom.xml
@@ -15,8 +15,7 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 -->
-<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/maven-v4_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/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>org.apache.distributedlog</groupId>
diff --git a/distributedlog-tutorials/distributedlog-basic/pom.xml b/distributedlog-tutorials/distributedlog-basic/pom.xml
index da1ae45..4ce5841 100644
--- a/distributedlog-tutorials/distributedlog-basic/pom.xml
+++ b/distributedlog-tutorials/distributedlog-basic/pom.xml
@@ -15,8 +15,7 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 -->
-<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<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">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <artifactId>distributedlog</artifactId>
diff --git a/distributedlog-tutorials/distributedlog-kafka/pom.xml b/distributedlog-tutorials/distributedlog-kafka/pom.xml
index 3c0f460..af39731 100644
--- a/distributedlog-tutorials/distributedlog-kafka/pom.xml
+++ b/distributedlog-tutorials/distributedlog-kafka/pom.xml
@@ -15,8 +15,7 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 -->
-<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<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">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <artifactId>distributedlog</artifactId>
diff --git a/distributedlog-tutorials/distributedlog-mapreduce/pom.xml b/distributedlog-tutorials/distributedlog-mapreduce/pom.xml
index 67e5444..09a813a 100644
--- a/distributedlog-tutorials/distributedlog-mapreduce/pom.xml
+++ b/distributedlog-tutorials/distributedlog-mapreduce/pom.xml
@@ -15,8 +15,7 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 -->
-<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<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">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <artifactId>distributedlog</artifactId>
diff --git a/distributedlog-tutorials/distributedlog-messaging/pom.xml b/distributedlog-tutorials/distributedlog-messaging/pom.xml
index 68e4629..c1072ad 100644
--- a/distributedlog-tutorials/distributedlog-messaging/pom.xml
+++ b/distributedlog-tutorials/distributedlog-messaging/pom.xml
@@ -15,8 +15,7 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 -->
-<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<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">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <artifactId>distributedlog</artifactId>
diff --git a/distributedlog-tutorials/pom.xml b/distributedlog-tutorials/pom.xml
index b610f76..036b462 100644
--- a/distributedlog-tutorials/pom.xml
+++ b/distributedlog-tutorials/pom.xml
@@ -15,10 +15,7 @@
    limitations under the License.
 -->
 
-<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>
     <groupId>org.apache.distributedlog</groupId>
     <artifactId>distributedlog</artifactId>
diff --git a/pom.xml b/pom.xml
index b3700ba..6effcd6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -15,8 +15,7 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 -->
-<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/maven-v4_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/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>org.apache</groupId>