[maven-release-plugin] prepare release kylin-2.5.2
diff --git a/assembly/pom.xml b/assembly/pom.xml
index 0b5090b..c6540b2 100644
--- a/assembly/pom.xml
+++ b/assembly/pom.xml
@@ -26,7 +26,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <properties>
diff --git a/core-common/pom.xml b/core-common/pom.xml
index 2545fc7..c8de7d6 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/core-cube/pom.xml b/core-cube/pom.xml
index b41e8bf..b189de37 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/core-dictionary/pom.xml b/core-dictionary/pom.xml
index 1f9c96e..6c7ef82 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/core-job/pom.xml b/core-job/pom.xml
index 89af797..f0f78a0 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/core-metadata/pom.xml b/core-metadata/pom.xml
index af3330d..446651c 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/core-metrics/pom.xml b/core-metrics/pom.xml
index 10959e1..429eeb1 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/core-storage/pom.xml b/core-storage/pom.xml
index f0390dd..d82600c 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/engine-mr/pom.xml b/engine-mr/pom.xml
index 10b7720..8376100 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/engine-spark/pom.xml b/engine-spark/pom.xml
index 27bd121..2a434c7 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/jdbc/pom.xml b/jdbc/pom.xml
index 6d356be..883ff46 100644
--- a/jdbc/pom.xml
+++ b/jdbc/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <properties>
diff --git a/kylin-it/pom.xml b/kylin-it/pom.xml
index c3fecc0..0665b80 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <properties>
diff --git a/metrics-reporter-hive/pom.xml b/metrics-reporter-hive/pom.xml
index d1fe86e..f8ef049 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/metrics-reporter-kafka/pom.xml b/metrics-reporter-kafka/pom.xml
index 1d3ea58..267fd38 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/pom.xml b/pom.xml
index 6049697..d919dbc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -30,7 +30,7 @@
     <groupId>org.apache.kylin</groupId>
     <artifactId>kylin</artifactId>
     <packaging>pom</packaging>
-    <version>2.5.2-SNAPSHOT</version>
+    <version>2.5.2</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-2.5.2</tag>
     </scm>
 
     <dependencyManagement>
diff --git a/query/pom.xml b/query/pom.xml
index f3c51ac..9f134a0 100644
--- a/query/pom.xml
+++ b/query/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/server-base/pom.xml b/server-base/pom.xml
index efb348e..4b69afe 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/server/pom.xml b/server/pom.xml
index a464f85..9393d50 100644
--- a/server/pom.xml
+++ b/server/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.kylin</groupId>
         <artifactId>kylin</artifactId>
-        <version>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/source-hive/pom.xml b/source-hive/pom.xml
index 286e1d0..4ff2c11 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/source-kafka/pom.xml b/source-kafka/pom.xml
index 176e21a..3dfad2c 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/storage-hbase/pom.xml b/storage-hbase/pom.xml
index 3be121b..ec6bc58 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <properties>
diff --git a/tomcat-ext/pom.xml b/tomcat-ext/pom.xml
index f2e752a..03906cf 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <dependencies>
diff --git a/tool-assembly/pom.xml b/tool-assembly/pom.xml
index 514dde2..19e3e02 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>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <properties>
diff --git a/tool/pom.xml b/tool/pom.xml
index 8589cc9..3ced7f1 100644
--- a/tool/pom.xml
+++ b/tool/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <artifactId>kylin</artifactId>
         <groupId>org.apache.kylin</groupId>
-        <version>2.5.2-SNAPSHOT</version>
+        <version>2.5.2</version>
     </parent>
 
     <properties>