[maven-release-plugin] prepare release release-0.9.0-rc0
diff --git a/pom.xml b/pom.xml
index a3294f4..8c83791 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,8 +17,7 @@
   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">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>org.apache</groupId>
@@ -27,7 +26,7 @@
   </parent>
   <groupId>org.apache.tajo</groupId>
   <artifactId>tajo-main</artifactId>
-  <version>0.9.0-SNAPSHOT</version>
+  <version>0.9.0</version>
   <description>Tajo Main</description>
   <name>Tajo Main</name>
   <packaging>pom</packaging>
@@ -58,6 +57,7 @@
     <url>https://git-wip-us.apache.org/repos/asf/tajo.git</url>
     <connection>scm:git:https://git-wip-us.apache.org/repos/asf/tajo.git</connection>
     <developerConnection>scm:git:https://git-wip-us.apache.org/repos/asf/tajo.git</developerConnection>
+    <tag>release-0.9.0-rc0</tag>
   </scm>
 
   <repositories>
@@ -171,7 +171,7 @@
                     fi
                   </echo>
                   <exec executable="bash" dir="${project.build.directory}" failonerror="true">
-                    <arg line="./verify-protocbuf.sh"/>
+                    <arg line="./verify-protocbuf.sh" />
                   </exec>
                 </target>
               </configuration>
@@ -214,7 +214,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
                 <pluginExecution>
@@ -228,7 +228,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
                 <pluginExecution>
@@ -242,7 +242,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
                 <pluginExecution>
@@ -255,7 +255,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
                 <pluginExecution>
@@ -269,7 +269,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
                 <pluginExecution>
@@ -282,7 +282,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
                 <pluginExecution>
@@ -295,7 +295,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
               </pluginExecutions>
diff --git a/tajo-algebra/pom.xml b/tajo-algebra/pom.xml
index a49c212..09a17f0 100644
--- a/tajo-algebra/pom.xml
+++ b/tajo-algebra/pom.xml
@@ -15,13 +15,12 @@
   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">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <artifactId>tajo-project</artifactId>
     <groupId>org.apache.tajo</groupId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
     <relativePath>../tajo-project</relativePath>
   </parent>
   <artifactId>tajo-algebra</artifactId>
@@ -189,7 +188,7 @@
                       echo
                     </echo>
                     <exec executable="sh" dir="${project.build.directory}" failonerror="true">
-                      <arg line="./dist-layout-stitching.sh"/>
+                      <arg line="./dist-layout-stitching.sh" />
                     </exec>
                   </target>
                 </configuration>
diff --git a/tajo-catalog/pom.xml b/tajo-catalog/pom.xml
index 970959a..ee0ca72 100644
--- a/tajo-catalog/pom.xml
+++ b/tajo-catalog/pom.xml
@@ -17,13 +17,11 @@
   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>
     <artifactId>tajo-project</artifactId>
     <groupId>org.apache.tajo</groupId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
 	  <relativePath>../tajo-project</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
@@ -143,7 +141,7 @@
                       echo
                     </echo>
                     <exec executable="sh" dir="${project.build.directory}" failonerror="true">
-                      <arg line="./dist-layout-stitching.sh"/>
+                      <arg line="./dist-layout-stitching.sh" />
                     </exec>
                   </target>
                 </configuration>
diff --git a/tajo-catalog/tajo-catalog-client/pom.xml b/tajo-catalog/tajo-catalog-client/pom.xml
index 4db1c26..e4ca436 100644
--- a/tajo-catalog/tajo-catalog-client/pom.xml
+++ b/tajo-catalog/tajo-catalog-client/pom.xml
@@ -17,13 +17,11 @@
   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>
     <artifactId>tajo-project</artifactId>
     <groupId>org.apache.tajo</groupId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
 	  <relativePath>../../tajo-project</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
diff --git a/tajo-catalog/tajo-catalog-common/pom.xml b/tajo-catalog/tajo-catalog-common/pom.xml
index b82495f..310fd9d 100644
--- a/tajo-catalog/tajo-catalog-common/pom.xml
+++ b/tajo-catalog/tajo-catalog-common/pom.xml
@@ -17,13 +17,11 @@
   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>
     <artifactId>tajo-project</artifactId>
     <groupId>org.apache.tajo</groupId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
 	  <relativePath>../../tajo-project</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
diff --git a/tajo-catalog/tajo-catalog-drivers/pom.xml b/tajo-catalog/tajo-catalog-drivers/pom.xml
index 001329d..2010e93 100644
--- a/tajo-catalog/tajo-catalog-drivers/pom.xml
+++ b/tajo-catalog/tajo-catalog-drivers/pom.xml
@@ -17,13 +17,11 @@
   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>
     <artifactId>tajo-project</artifactId>
     <groupId>org.apache.tajo</groupId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
 	  <relativePath>../../tajo-project</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
diff --git a/tajo-catalog/tajo-catalog-server/pom.xml b/tajo-catalog/tajo-catalog-server/pom.xml
index 1e9e2c2..676046f 100644
--- a/tajo-catalog/tajo-catalog-server/pom.xml
+++ b/tajo-catalog/tajo-catalog-server/pom.xml
@@ -17,13 +17,11 @@
   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>
     <artifactId>tajo-project</artifactId>
     <groupId>org.apache.tajo</groupId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
     <relativePath>../../tajo-project</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
@@ -73,7 +71,7 @@
             <phase>initialize</phase>
             <configuration>
               <target>
-                <mkdir dir="target/generated-sources/proto"/>
+                <mkdir dir="target/generated-sources/proto" />
               </target>
             </configuration>
             <goals>
diff --git a/tajo-client/pom.xml b/tajo-client/pom.xml
index 1c109f5..f6b8586 100644
--- a/tajo-client/pom.xml
+++ b/tajo-client/pom.xml
@@ -17,13 +17,12 @@
   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">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <artifactId>tajo-project</artifactId>
     <groupId>org.apache.tajo</groupId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
     <relativePath>../tajo-project</relativePath>
   </parent>
   <artifactId>tajo-client</artifactId>
@@ -318,7 +317,7 @@
                       echo
                     </echo>
                     <exec executable="sh" dir="${project.build.directory}" failonerror="true">
-                      <arg line="./dist-layout-stitching.sh"/>
+                      <arg line="./dist-layout-stitching.sh" />
                     </exec>
                   </target>
                 </configuration>
diff --git a/tajo-common/pom.xml b/tajo-common/pom.xml
index f1a8c40..939a21f 100644
--- a/tajo-common/pom.xml
+++ b/tajo-common/pom.xml
@@ -12,14 +12,12 @@
   See the License for the specific language governing permissions and
   limitations under the License. See accompanying LICENSE file.
 -->
-<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">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <artifactId>tajo-project</artifactId>
     <groupId>org.apache.tajo</groupId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
     <relativePath>../tajo-project</relativePath>
   </parent>
 
@@ -314,7 +312,7 @@
                       echo
                     </echo>
                     <exec executable="sh" dir="${project.build.directory}" failonerror="true">
-                      <arg line="./dist-layout-stitching.sh"/>
+                      <arg line="./dist-layout-stitching.sh" />
                     </exec>
                   </target>
                 </configuration>
diff --git a/tajo-core/pom.xml b/tajo-core/pom.xml
index d33b598..c71fe78 100644
--- a/tajo-core/pom.xml
+++ b/tajo-core/pom.xml
@@ -17,13 +17,12 @@
   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">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <artifactId>tajo-project</artifactId>
     <groupId>org.apache.tajo</groupId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
     <relativePath>../tajo-project</relativePath>
   </parent>
   <artifactId>tajo-core</artifactId>
diff --git a/tajo-dist/pom.xml b/tajo-dist/pom.xml
index a0cbe9f..8a17822 100644
--- a/tajo-dist/pom.xml
+++ b/tajo-dist/pom.xml
@@ -17,13 +17,11 @@
   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>
     <artifactId>tajo-project</artifactId>
     <groupId>org.apache.tajo</groupId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
     <relativePath>../tajo-project</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
@@ -155,9 +153,9 @@
                       echo
                     </echo>
                     <exec executable="sh" dir="${project.build.directory}" failonerror="true">
-                      <arg line="./dist-layout-stitching.sh"/>
+                      <arg line="./dist-layout-stitching.sh" />
                     </exec>
-                    <chmod dir="${project.build.directory}/tajo-${project.version}/bin" perm="ugo+rx" includes="**/*.sh,tajo,tajo-dump,tsql"/>
+                    <chmod dir="${project.build.directory}/tajo-${project.version}/bin" perm="ugo+rx" includes="**/*.sh,tajo,tajo-dump,tsql" />
                   </target>
                 </configuration>
               </execution>
@@ -188,7 +186,7 @@
                       echo
                     </echo>
                     <exec executable="sh" dir="${project.build.directory}" failonerror="true">
-                      <arg line="./dist-tar-stitching.sh"/>
+                      <arg line="./dist-tar-stitching.sh" />
                     </exec>
                   </target>
                 </configuration>
diff --git a/tajo-jdbc/pom.xml b/tajo-jdbc/pom.xml
index 1708f5a..6b2badb 100644
--- a/tajo-jdbc/pom.xml
+++ b/tajo-jdbc/pom.xml
@@ -17,13 +17,12 @@
   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">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <artifactId>tajo-project</artifactId>
     <groupId>org.apache.tajo</groupId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
     <relativePath>../tajo-project</relativePath>
   </parent>
   <artifactId>tajo-jdbc</artifactId>
diff --git a/tajo-maven-plugins/pom.xml b/tajo-maven-plugins/pom.xml
index 43ff9e0..84a7b2a 100644
--- a/tajo-maven-plugins/pom.xml
+++ b/tajo-maven-plugins/pom.xml
@@ -12,14 +12,12 @@
   See the License for the specific language governing permissions and
   limitations under the License. See accompanying LICENSE file.
 -->
-<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.tajo</groupId>
     <artifactId>tajo-project</artifactId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
     <relativePath>../tajo-project</relativePath>
   </parent>
   <groupId>org.apache.tajo</groupId>
diff --git a/tajo-project/pom.xml b/tajo-project/pom.xml
index b90cc38..177f5cf 100644
--- a/tajo-project/pom.xml
+++ b/tajo-project/pom.xml
@@ -17,13 +17,12 @@
   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">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>org.apache.tajo</groupId>
     <artifactId>tajo-main</artifactId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
   </parent>
   <groupId>org.apache.tajo</groupId>
   <artifactId>tajo-project</artifactId>
@@ -36,7 +35,7 @@
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <hadoop.version>2.5.1</hadoop.version>
     <protobuf.version>2.5.0</protobuf.version>
-    <tajo.version>0.9.0-SNAPSHOT</tajo.version>
+    <tajo.version>0.9.0</tajo.version>
     <tajo.root>${project.parent.relativePath}/..</tajo.root>
     <extra.source.path>src/main/hadoop-${hadoop.version}</extra.source.path>
   </properties>
@@ -58,21 +57,21 @@
       <id>akarasulu</id>
       <name>Alex Karasulu</name>
       <email>akarasulu@apache.org</email>
-      <organization></organization>
+      <organization />
       <roles>
         <role>PMC</role>
       </roles>
-      <timezone></timezone>
+      <timezone />
     </developer>
     <developer>
       <id>ahenrick</id>
       <name>Alvin Derek Henrick</name>
       <email>ahenrick@apache.org</email>
-      <organization></organization>
+      <organization />
       <roles>
         <role>Committer</role>
       </roles>
-      <timezone></timezone>
+      <timezone />
     </developer>
     <developer>
       <id>mattmann</id>
@@ -267,7 +266,7 @@
     </contributor>
     <contributor>
       <name>Jihun Kang</name>
-      <organization></organization>
+      <organization />
       <roles><role>Contributor</role></roles>
     </contributor>
     <contributor>
@@ -282,7 +281,7 @@
     </contributor>        
     <contributor>
       <name>Prafulla T.</name>
-      <organization></organization>
+      <organization />
       <roles><role>Contributor</role></roles>
     </contributor>
     <contributor>
@@ -325,6 +324,7 @@
     <url>https://git-wip-us.apache.org/repos/asf/tajo.git</url>
     <connection>scm:git:https://git-wip-us.apache.org/repos/asf/tajo.git</connection>
     <developerConnection>scm:git:https://git-wip-us.apache.org/repos/asf/tajo.git</developerConnection>
+    <tag>release-0.9.0-rc0</tag>
   </scm>
 
   <mailingLists>
@@ -489,7 +489,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
                 <pluginExecution>
@@ -503,7 +503,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
                 <pluginExecution>
@@ -517,7 +517,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
                 <pluginExecution>
@@ -530,7 +530,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
                 <pluginExecution>
@@ -544,7 +544,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
                 <pluginExecution>
@@ -557,7 +557,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
                 <pluginExecution>
@@ -570,7 +570,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
               </pluginExecutions>
diff --git a/tajo-rpc/pom.xml b/tajo-rpc/pom.xml
index 06e24b9..72c8649 100644
--- a/tajo-rpc/pom.xml
+++ b/tajo-rpc/pom.xml
@@ -16,12 +16,11 @@
   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">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <artifactId>tajo-project</artifactId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
     <groupId>org.apache.tajo</groupId>
     <relativePath>../tajo-project</relativePath>
   </parent>
@@ -253,7 +252,7 @@
                       echo
                     </echo>
                     <exec executable="sh" dir="${project.build.directory}" failonerror="true">
-                      <arg line="./dist-layout-stitching.sh"/>
+                      <arg line="./dist-layout-stitching.sh" />
                     </exec>
                   </target>
                 </configuration>
diff --git a/tajo-storage/pom.xml b/tajo-storage/pom.xml
index 6f80ea5..f11c985 100644
--- a/tajo-storage/pom.xml
+++ b/tajo-storage/pom.xml
@@ -15,14 +15,12 @@
   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">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <artifactId>tajo-project</artifactId>
     <groupId>org.apache.tajo</groupId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
     <relativePath>../tajo-project</relativePath>
   </parent>
 
@@ -394,7 +392,7 @@
                       echo
                     </echo>
                     <exec executable="sh" dir="${project.build.directory}" failonerror="true">
-                      <arg line="./dist-layout-stitching.sh"/>
+                      <arg line="./dist-layout-stitching.sh" />
                     </exec>
                   </target>
                 </configuration>
diff --git a/tajo-thirdparty/asm/pom.xml b/tajo-thirdparty/asm/pom.xml
index 5464d49..a9be622 100644
--- a/tajo-thirdparty/asm/pom.xml
+++ b/tajo-thirdparty/asm/pom.xml
@@ -12,14 +12,12 @@
   See the License for the specific language governing permissions and
   limitations under the License. See accompanying LICENSE file.
 -->
-<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">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <artifactId>tajo-project</artifactId>
     <groupId>org.apache.tajo</groupId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
     <relativePath>../../tajo-project</relativePath>
   </parent>
 
@@ -157,7 +155,7 @@
                       echo
                     </echo>
                     <exec executable="sh" dir="${project.build.directory}" failonerror="true">
-                      <arg line="./dist-layout-stitching.sh"/>
+                      <arg line="./dist-layout-stitching.sh" />
                     </exec>
                   </target>
                 </configuration>
diff --git a/tajo-yarn-pullserver/pom.xml b/tajo-yarn-pullserver/pom.xml
index 64b3a74..902af61 100644
--- a/tajo-yarn-pullserver/pom.xml
+++ b/tajo-yarn-pullserver/pom.xml
@@ -17,13 +17,11 @@
   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>
     <artifactId>tajo-project</artifactId>
     <groupId>org.apache.tajo</groupId>
-    <version>0.9.0-SNAPSHOT</version>
+    <version>0.9.0</version>
     <relativePath>../tajo-project</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>