[maven-release-plugin] prepare release 0.7.1-RC2
diff --git a/c++/pom.xml b/c++/pom.xml
index 358db37..e4f23c8 100644
--- a/c++/pom.xml
+++ b/c++/pom.xml
@@ -20,13 +20,13 @@
     <parent>
       <groupId>org.apache.hama</groupId>
       <artifactId>hama-parent</artifactId>
-      <version>0.7.1-SNAPSHOT</version>
+      <version>0.7.1</version>
     </parent>
     
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.apache.hama</groupId>
     <artifactId>hama-pipes</artifactId>
-    <version>0.7.1-SNAPSHOT</version>
+    <version>0.7.1</version>
     <name>pipes</name>
     <description>Apache Hama Pipes</description>
     <packaging>pom</packaging>
diff --git a/commons/pom.xml b/commons/pom.xml
index 8625c2f..a7bb98c 100644
--- a/commons/pom.xml
+++ b/commons/pom.xml
@@ -20,14 +20,14 @@
   <parent>
     <groupId>org.apache.hama</groupId>
     <artifactId>hama-parent</artifactId>
-    <version>0.7.1-SNAPSHOT</version>
+    <version>0.7.1</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.apache.hama</groupId>
   <artifactId>hama-commons</artifactId>
   <name>commons</name>
-  <version>0.7.1-SNAPSHOT</version>
+  <version>0.7.1</version>
   <packaging>jar</packaging>
 
   <dependencies>
diff --git a/core/pom.xml b/core/pom.xml
index 2adb920..05e81b2 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -20,14 +20,14 @@
   <parent>
     <groupId>org.apache.hama</groupId>
     <artifactId>hama-parent</artifactId>
-    <version>0.7.1-SNAPSHOT</version>
+    <version>0.7.1</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.apache.hama</groupId>
   <artifactId>hama-core</artifactId>
   <name>core</name>
-  <version>0.7.1-SNAPSHOT</version>
+  <version>0.7.1</version>
   <packaging>jar</packaging>
 
   <dependencies>
diff --git a/dist/pom.xml b/dist/pom.xml
index f8cae37..7cb7e17 100644
--- a/dist/pom.xml
+++ b/dist/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>org.apache.hama</groupId>
     <artifactId>hama-parent</artifactId>
-    <version>0.7.1-SNAPSHOT</version>
+    <version>0.7.1</version>
   </parent>
   
   <artifactId>hama-dist</artifactId>
diff --git a/examples/pom.xml b/examples/pom.xml
index 49b7227..ec77362 100644
--- a/examples/pom.xml
+++ b/examples/pom.xml
@@ -20,14 +20,14 @@
   <parent>
     <groupId>org.apache.hama</groupId>
     <artifactId>hama-parent</artifactId>
-    <version>0.7.1-SNAPSHOT</version>
+    <version>0.7.1</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.apache.hama</groupId>
   <artifactId>hama-examples</artifactId>
   <name>examples</name>
-  <version>0.7.1-SNAPSHOT</version>
+  <version>0.7.1</version>
   <packaging>jar</packaging>
 
   <dependencies>
diff --git a/graph/pom.xml b/graph/pom.xml
index 14fd3ef..982ea07 100644
--- a/graph/pom.xml
+++ b/graph/pom.xml
@@ -20,14 +20,14 @@
   <parent>
     <groupId>org.apache.hama</groupId>
     <artifactId>hama-parent</artifactId>
-    <version>0.7.1-SNAPSHOT</version>
+    <version>0.7.1</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.apache.hama</groupId>
   <artifactId>hama-graph</artifactId>
   <name>graph</name>
-  <version>0.7.1-SNAPSHOT</version>
+  <version>0.7.1</version>
   <packaging>jar</packaging>
 
   <dependencies>
diff --git a/mesos/pom.xml b/mesos/pom.xml
index c0af443..fbff0ec 100644
--- a/mesos/pom.xml
+++ b/mesos/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>org.apache.hama</groupId>
     <artifactId>hama-parent</artifactId>
-    <version>0.7.1-SNAPSHOT</version>
+    <version>0.7.1</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
diff --git a/ml/pom.xml b/ml/pom.xml
index 6701df0..5d81f1d 100644
--- a/ml/pom.xml
+++ b/ml/pom.xml
@@ -20,14 +20,14 @@
   <parent>
     <groupId>org.apache.hama</groupId>
     <artifactId>hama-parent</artifactId>
-    <version>0.7.1-SNAPSHOT</version>
+    <version>0.7.1</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.apache.hama</groupId>
   <artifactId>hama-ml</artifactId>
   <name>machine learning</name>
-  <version>0.7.1-SNAPSHOT</version>
+  <version>0.7.1</version>
   <packaging>jar</packaging>
 
   <dependencies>
diff --git a/pom.xml b/pom.xml
index b7c575c..9088df5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -27,7 +27,7 @@
   <groupId>org.apache.hama</groupId>
   <artifactId>hama-parent</artifactId>
   <name>Apache Hama parent POM</name>
-  <version>0.7.1-SNAPSHOT</version>
+  <version>0.7.1</version>
   <url>http://hama.apache.org</url>
   <packaging>pom</packaging>
   <prerequisites>
@@ -79,7 +79,7 @@
     <url>https://git-wip-us.apache.org/repos/asf/hama.git</url>
     <connection>scm:git:https://git-wip-us.apache.org/repos/asf/hama.git</connection>
     <developerConnection>scm:git:https://git-wip-us.apache.org/repos/asf/hama.git</developerConnection>
-    <tag>HEAD</tag>
+    <tag>0.7.1-RC2</tag>
   </scm>
 
   <properties>
diff --git a/yarn/pom.xml b/yarn/pom.xml
index dede15f..f73b75f 100644
--- a/yarn/pom.xml
+++ b/yarn/pom.xml
@@ -19,14 +19,14 @@
   <parent>
     <groupId>org.apache.hama</groupId>
     <artifactId>hama-parent</artifactId>
-    <version>0.7.1-SNAPSHOT</version>
+    <version>0.7.1</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.apache.hama</groupId>
   <artifactId>hama-yarn</artifactId>
   <name>yarn</name>
-  <version>0.7.1-SNAPSHOT</version>
+  <version>0.7.1</version>
   <packaging>jar</packaging>
 
   <dependencies>