[maven-release-plugin] prepare release kylin-2.5.1
diff --git a/assembly/pom.xml b/assembly/pom.xml
index 02a535e..2816c6b 100644
--- a/assembly/pom.xml
+++ b/assembly/pom.xml
@@ -26,7 +26,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <properties>
diff --git a/atopcalcite/pom.xml b/atopcalcite/pom.xml
index 1b975cb..0c9b218 100644
--- a/atopcalcite/pom.xml
+++ b/atopcalcite/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/core-common/pom.xml b/core-common/pom.xml
index fd02274..57e8b2e 100644
--- a/core-common/pom.xml
+++ b/core-common/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/core-cube/pom.xml b/core-cube/pom.xml
index df13d1e..54efcdd 100644
--- a/core-cube/pom.xml
+++ b/core-cube/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/core-dictionary/pom.xml b/core-dictionary/pom.xml
index 25a10e7..ee748b6 100644
--- a/core-dictionary/pom.xml
+++ b/core-dictionary/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/core-job/pom.xml b/core-job/pom.xml
index 491be34..1e42410 100644
--- a/core-job/pom.xml
+++ b/core-job/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/core-metadata/pom.xml b/core-metadata/pom.xml
index 88dd284..5430b4f 100644
--- a/core-metadata/pom.xml
+++ b/core-metadata/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/core-metrics/pom.xml b/core-metrics/pom.xml
index 635c38b..3fac13d 100644
--- a/core-metrics/pom.xml
+++ b/core-metrics/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/core-storage/pom.xml b/core-storage/pom.xml
index 374eae4..dda19b1 100644
--- a/core-storage/pom.xml
+++ b/core-storage/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/engine-mr/pom.xml b/engine-mr/pom.xml
index a7efef4..453821b 100644
--- a/engine-mr/pom.xml
+++ b/engine-mr/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/engine-spark/pom.xml b/engine-spark/pom.xml
index b609244..e44c8ae 100644
--- a/engine-spark/pom.xml
+++ b/engine-spark/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/jdbc/pom.xml b/jdbc/pom.xml
index 316fcd4..5083ae4 100644
--- a/jdbc/pom.xml
+++ b/jdbc/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <properties>
diff --git a/kylin-it/pom.xml b/kylin-it/pom.xml
index 8a4ab88..2555fa2 100644
--- a/kylin-it/pom.xml
+++ b/kylin-it/pom.xml
@@ -29,7 +29,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <properties>
diff --git a/metrics-reporter-hive/pom.xml b/metrics-reporter-hive/pom.xml
index 6c64b2a..4cdee56 100644
--- a/metrics-reporter-hive/pom.xml
+++ b/metrics-reporter-hive/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/metrics-reporter-kafka/pom.xml b/metrics-reporter-kafka/pom.xml
index 9877848..f714513 100644
--- a/metrics-reporter-kafka/pom.xml
+++ b/metrics-reporter-kafka/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/pom.xml b/pom.xml
index 315a403..abae3c7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -30,7 +30,7 @@
     <groupId>org.apache.kylin</groupId>
     <artifactId>kylin</artifactId>
     <packaging>pom</packaging>
-    <version>2.5.1-SNAPSHOT</version>
+    <version>2.5.1</version>
 
     <name>Apache Kylin</name>
     <url>http://kylin.apache.org</url>
@@ -200,7 +200,7 @@
         <developerConnection>scm:git:ssh://git@github.com/apache/kylin.git
         </developerConnection>
         <url>https://github.com/apache/kylin</url>
-        <tag>HEAD</tag>
+        <tag>kylin-2.5.1</tag>
     </scm>
 
     <dependencyManagement>
diff --git a/query/pom.xml b/query/pom.xml
index 8b331d1..10f7186 100644
--- a/query/pom.xml
+++ b/query/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/server-base/pom.xml b/server-base/pom.xml
index 5f803fc..1a27d85 100644
--- a/server-base/pom.xml
+++ b/server-base/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/server/pom.xml b/server/pom.xml
index 3e08f70..785266d 100644
--- a/server/pom.xml
+++ b/server/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/source-hive/pom.xml b/source-hive/pom.xml
index 9829532..d9ffa0f 100644
--- a/source-hive/pom.xml
+++ b/source-hive/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/source-kafka/pom.xml b/source-kafka/pom.xml
index 36e980d..26ed24f 100644
--- a/source-kafka/pom.xml
+++ b/source-kafka/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/storage-hbase/pom.xml b/storage-hbase/pom.xml
index 314ab5e..fdd502b 100644
--- a/storage-hbase/pom.xml
+++ b/storage-hbase/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <properties>
diff --git a/tomcat-ext/pom.xml b/tomcat-ext/pom.xml
index fc1cda8..f7d75e8 100644
--- a/tomcat-ext/pom.xml
+++ b/tomcat-ext/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <dependencies>
diff --git a/tool-assembly/pom.xml b/tool-assembly/pom.xml
index aebabb2..1457dda 100644
--- a/tool-assembly/pom.xml
+++ b/tool-assembly/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <properties>
diff --git a/tool/pom.xml b/tool/pom.xml
index d14dde4..8d01bac 100644
--- a/tool/pom.xml
+++ b/tool/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.5.1-SNAPSHOT</version>
+        <version>2.5.1</version>
     </parent>
 
     <properties>