diff --git a/docs/_config.yml b/docs/_config.yml
index 5a83c9a95e4e4..635e38bddfba1 100644
--- a/docs/_config.yml
+++ b/docs/_config.yml
@@ -27,10 +27,10 @@
 # we change the version for the complete docs when forking of a release branch
 # etc.
 # The full version string as referenced in Maven (e.g. 1.2.1)
-version: "1.8-SNAPSHOT"
+version: "1.9-SNAPSHOT"
 # For stable releases, leave the bugfix version out (e.g. 1.2). For snapshot
 # release this should be the same as the regular version
-version_title: "1.8-SNAPSHOT"
+version_title: "1.9-SNAPSHOT"
 # Branch on Github for this version
 github_branch: "master"
 
diff --git a/flink-annotations/pom.xml b/flink-annotations/pom.xml
index 1bfb19b9516ac..6a31aac00f2bb 100644
--- a/flink-annotations/pom.xml
+++ b/flink-annotations/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-clients/pom.xml b/flink-clients/pom.xml
index 52f0a9e5b2001..294e0d5112c18 100644
--- a/flink-clients/pom.xml
+++ b/flink-clients/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-cassandra/pom.xml b/flink-connectors/flink-connector-cassandra/pom.xml
index 882e66229055e..f22e94537e22f 100644
--- a/flink-connectors/flink-connector-cassandra/pom.xml
+++ b/flink-connectors/flink-connector-cassandra/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-elasticsearch-base/pom.xml b/flink-connectors/flink-connector-elasticsearch-base/pom.xml
index ebd722ae853d0..73aae6394bd62 100644
--- a/flink-connectors/flink-connector-elasticsearch-base/pom.xml
+++ b/flink-connectors/flink-connector-elasticsearch-base/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-elasticsearch/pom.xml b/flink-connectors/flink-connector-elasticsearch/pom.xml
index b3fdfe2740093..1b71e6f766f30 100644
--- a/flink-connectors/flink-connector-elasticsearch/pom.xml
+++ b/flink-connectors/flink-connector-elasticsearch/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-elasticsearch2/pom.xml b/flink-connectors/flink-connector-elasticsearch2/pom.xml
index de4339653df0c..603af806b60e8 100644
--- a/flink-connectors/flink-connector-elasticsearch2/pom.xml
+++ b/flink-connectors/flink-connector-elasticsearch2/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-elasticsearch5/pom.xml b/flink-connectors/flink-connector-elasticsearch5/pom.xml
index 3598e683cc887..075012376b28d 100644
--- a/flink-connectors/flink-connector-elasticsearch5/pom.xml
+++ b/flink-connectors/flink-connector-elasticsearch5/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-elasticsearch6/pom.xml b/flink-connectors/flink-connector-elasticsearch6/pom.xml
index b2a9886510d66..de47b58ad434e 100644
--- a/flink-connectors/flink-connector-elasticsearch6/pom.xml
+++ b/flink-connectors/flink-connector-elasticsearch6/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-filesystem/pom.xml b/flink-connectors/flink-connector-filesystem/pom.xml
index 4fb5b4e489e0a..99903f201a24d 100644
--- a/flink-connectors/flink-connector-filesystem/pom.xml
+++ b/flink-connectors/flink-connector-filesystem/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-kafka-0.10/pom.xml b/flink-connectors/flink-connector-kafka-0.10/pom.xml
index 0336b3124e772..f43cf20c1c7ea 100644
--- a/flink-connectors/flink-connector-kafka-0.10/pom.xml
+++ b/flink-connectors/flink-connector-kafka-0.10/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-kafka-0.11/pom.xml b/flink-connectors/flink-connector-kafka-0.11/pom.xml
index 70ff20acdc2fb..8eefcb4124cc1 100644
--- a/flink-connectors/flink-connector-kafka-0.11/pom.xml
+++ b/flink-connectors/flink-connector-kafka-0.11/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-kafka-0.8/pom.xml b/flink-connectors/flink-connector-kafka-0.8/pom.xml
index 4bd98930df817..1770a9b0ba0b0 100644
--- a/flink-connectors/flink-connector-kafka-0.8/pom.xml
+++ b/flink-connectors/flink-connector-kafka-0.8/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-kafka-0.9/pom.xml b/flink-connectors/flink-connector-kafka-0.9/pom.xml
index 840aa9a6a9dff..13dbde9779256 100644
--- a/flink-connectors/flink-connector-kafka-0.9/pom.xml
+++ b/flink-connectors/flink-connector-kafka-0.9/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-kafka-base/pom.xml b/flink-connectors/flink-connector-kafka-base/pom.xml
index 461037620f73f..b9396f2786f57 100644
--- a/flink-connectors/flink-connector-kafka-base/pom.xml
+++ b/flink-connectors/flink-connector-kafka-base/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-kafka/pom.xml b/flink-connectors/flink-connector-kafka/pom.xml
index 09bb450668f7c..fb680f8350609 100644
--- a/flink-connectors/flink-connector-kafka/pom.xml
+++ b/flink-connectors/flink-connector-kafka/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<artifactId>flink-connectors</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-kinesis/pom.xml b/flink-connectors/flink-connector-kinesis/pom.xml
index b131e0deac841..621869251e769 100644
--- a/flink-connectors/flink-connector-kinesis/pom.xml
+++ b/flink-connectors/flink-connector-kinesis/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-nifi/pom.xml b/flink-connectors/flink-connector-nifi/pom.xml
index 81e61c0bafaff..38c08fc2a1d48 100644
--- a/flink-connectors/flink-connector-nifi/pom.xml
+++ b/flink-connectors/flink-connector-nifi/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-rabbitmq/pom.xml b/flink-connectors/flink-connector-rabbitmq/pom.xml
index bb30c35edf362..86523767865db 100644
--- a/flink-connectors/flink-connector-rabbitmq/pom.xml
+++ b/flink-connectors/flink-connector-rabbitmq/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-twitter/pom.xml b/flink-connectors/flink-connector-twitter/pom.xml
index eca315ff15d48..58365c5f4e2a3 100644
--- a/flink-connectors/flink-connector-twitter/pom.xml
+++ b/flink-connectors/flink-connector-twitter/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-hadoop-compatibility/pom.xml b/flink-connectors/flink-hadoop-compatibility/pom.xml
index fb61f6ae4b15d..da63b79675754 100644
--- a/flink-connectors/flink-hadoop-compatibility/pom.xml
+++ b/flink-connectors/flink-hadoop-compatibility/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-hbase/pom.xml b/flink-connectors/flink-hbase/pom.xml
index 450560722022b..7bdf6d9dd4d9f 100644
--- a/flink-connectors/flink-hbase/pom.xml
+++ b/flink-connectors/flink-hbase/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-hcatalog/pom.xml b/flink-connectors/flink-hcatalog/pom.xml
index 4bd377a2997a3..ea0ded49e411c 100644
--- a/flink-connectors/flink-hcatalog/pom.xml
+++ b/flink-connectors/flink-hcatalog/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-jdbc/pom.xml b/flink-connectors/flink-jdbc/pom.xml
index ae3db43cdcca7..66429155f7901 100644
--- a/flink-connectors/flink-jdbc/pom.xml
+++ b/flink-connectors/flink-jdbc/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-orc/pom.xml b/flink-connectors/flink-orc/pom.xml
index 97da72ced1cd4..ce22b94c76203 100644
--- a/flink-connectors/flink-orc/pom.xml
+++ b/flink-connectors/flink-orc/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-sql-connector-elasticsearch6/pom.xml b/flink-connectors/flink-sql-connector-elasticsearch6/pom.xml
index 95432f448bed6..66ba7f0b3e8c6 100644
--- a/flink-connectors/flink-sql-connector-elasticsearch6/pom.xml
+++ b/flink-connectors/flink-sql-connector-elasticsearch6/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-sql-connector-kafka-0.10/pom.xml b/flink-connectors/flink-sql-connector-kafka-0.10/pom.xml
index 0411ab92cc538..b3129a6c15e58 100644
--- a/flink-connectors/flink-sql-connector-kafka-0.10/pom.xml
+++ b/flink-connectors/flink-sql-connector-kafka-0.10/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-sql-connector-kafka-0.11/pom.xml b/flink-connectors/flink-sql-connector-kafka-0.11/pom.xml
index 2401d310c353e..75a582028c442 100644
--- a/flink-connectors/flink-sql-connector-kafka-0.11/pom.xml
+++ b/flink-connectors/flink-sql-connector-kafka-0.11/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-sql-connector-kafka-0.9/pom.xml b/flink-connectors/flink-sql-connector-kafka-0.9/pom.xml
index 9185171a9fc9d..bc6726b7132d8 100644
--- a/flink-connectors/flink-sql-connector-kafka-0.9/pom.xml
+++ b/flink-connectors/flink-sql-connector-kafka-0.9/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-sql-connector-kafka/pom.xml b/flink-connectors/flink-sql-connector-kafka/pom.xml
index bc65b3db59047..b137a2cb8e93e 100644
--- a/flink-connectors/flink-sql-connector-kafka/pom.xml
+++ b/flink-connectors/flink-sql-connector-kafka/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<artifactId>flink-connectors</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/pom.xml b/flink-connectors/pom.xml
index 80b0c257c61be..0592108c92265 100644
--- a/flink-connectors/pom.xml
+++ b/flink-connectors/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-container/pom.xml b/flink-container/pom.xml
index 46bbdbb2fe9f8..4582ca934ecc8 100644
--- a/flink-container/pom.xml
+++ b/flink-container/pom.xml
@@ -24,7 +24,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-contrib/flink-connector-wikiedits/pom.xml b/flink-contrib/flink-connector-wikiedits/pom.xml
index 1723a9a5cb61b..d04a348bccfcc 100644
--- a/flink-contrib/flink-connector-wikiedits/pom.xml
+++ b/flink-contrib/flink-connector-wikiedits/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-contrib</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-contrib/pom.xml b/flink-contrib/pom.xml
index ad81ad6b0e780..8573c93650d88 100644
--- a/flink-contrib/pom.xml
+++ b/flink-contrib/pom.xml
@@ -27,7 +27,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-core/pom.xml b/flink-core/pom.xml
index c17aeb30d2a09..8eb1998aef556 100644
--- a/flink-core/pom.xml
+++ b/flink-core/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-dist/pom.xml b/flink-dist/pom.xml
index 48c6ae08cfaed..0f15f740a8ed0 100644
--- a/flink-dist/pom.xml
+++ b/flink-dist/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-docs/pom.xml b/flink-docs/pom.xml
index 848a6bde1bd68..2684fda00e909 100644
--- a/flink-docs/pom.xml
+++ b/flink-docs/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-bucketing-sink-test/pom.xml b/flink-end-to-end-tests/flink-bucketing-sink-test/pom.xml
index 2b2a0acd7f4b6..dc96250f341c0 100644
--- a/flink-end-to-end-tests/flink-bucketing-sink-test/pom.xml
+++ b/flink-end-to-end-tests/flink-bucketing-sink-test/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-cli-test/pom.xml b/flink-end-to-end-tests/flink-cli-test/pom.xml
index d3637bdf6186c..c738d08e98bff 100644
--- a/flink-end-to-end-tests/flink-cli-test/pom.xml
+++ b/flink-end-to-end-tests/flink-cli-test/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-confluent-schema-registry/pom.xml b/flink-end-to-end-tests/flink-confluent-schema-registry/pom.xml
index 0dc5869439ce4..71ffb98811c94 100644
--- a/flink-end-to-end-tests/flink-confluent-schema-registry/pom.xml
+++ b/flink-end-to-end-tests/flink-confluent-schema-registry/pom.xml
@@ -22,7 +22,7 @@ under the License.
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
diff --git a/flink-end-to-end-tests/flink-dataset-allround-test/pom.xml b/flink-end-to-end-tests/flink-dataset-allround-test/pom.xml
index 7bbe1db80d0f7..4baf81a35affb 100644
--- a/flink-end-to-end-tests/flink-dataset-allround-test/pom.xml
+++ b/flink-end-to-end-tests/flink-dataset-allround-test/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-datastream-allround-test/pom.xml b/flink-end-to-end-tests/flink-datastream-allround-test/pom.xml
index abe39d47670dd..3f74400b732b7 100644
--- a/flink-end-to-end-tests/flink-datastream-allround-test/pom.xml
+++ b/flink-end-to-end-tests/flink-datastream-allround-test/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-distributed-cache-via-blob-test/pom.xml b/flink-end-to-end-tests/flink-distributed-cache-via-blob-test/pom.xml
index a1bf76058a966..b6a3764867421 100644
--- a/flink-end-to-end-tests/flink-distributed-cache-via-blob-test/pom.xml
+++ b/flink-end-to-end-tests/flink-distributed-cache-via-blob-test/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-e2e-test-utils/pom.xml b/flink-end-to-end-tests/flink-e2e-test-utils/pom.xml
index f3de836d509d2..b68ca2505b644 100644
--- a/flink-end-to-end-tests/flink-e2e-test-utils/pom.xml
+++ b/flink-end-to-end-tests/flink-e2e-test-utils/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
diff --git a/flink-end-to-end-tests/flink-elasticsearch1-test/pom.xml b/flink-end-to-end-tests/flink-elasticsearch1-test/pom.xml
index 3c8fb646221df..aa10fce06a0e1 100644
--- a/flink-end-to-end-tests/flink-elasticsearch1-test/pom.xml
+++ b/flink-end-to-end-tests/flink-elasticsearch1-test/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-elasticsearch2-test/pom.xml b/flink-end-to-end-tests/flink-elasticsearch2-test/pom.xml
index d0e44dcb116df..aad082a2c98db 100644
--- a/flink-end-to-end-tests/flink-elasticsearch2-test/pom.xml
+++ b/flink-end-to-end-tests/flink-elasticsearch2-test/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-elasticsearch5-test/pom.xml b/flink-end-to-end-tests/flink-elasticsearch5-test/pom.xml
index e55aff10c89ae..259627b7cd258 100644
--- a/flink-end-to-end-tests/flink-elasticsearch5-test/pom.xml
+++ b/flink-end-to-end-tests/flink-elasticsearch5-test/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-elasticsearch6-test/pom.xml b/flink-end-to-end-tests/flink-elasticsearch6-test/pom.xml
index 831b5ef21dc77..464e5311028c9 100644
--- a/flink-end-to-end-tests/flink-elasticsearch6-test/pom.xml
+++ b/flink-end-to-end-tests/flink-elasticsearch6-test/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-end-to-end-tests-common/pom.xml b/flink-end-to-end-tests/flink-end-to-end-tests-common/pom.xml
index 1ef4a1bd95406..a04c43c941c29 100644
--- a/flink-end-to-end-tests/flink-end-to-end-tests-common/pom.xml
+++ b/flink-end-to-end-tests/flink-end-to-end-tests-common/pom.xml
@@ -22,13 +22,13 @@ under the License.
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 	</parent>
 
 	<modelVersion>4.0.0</modelVersion>
 
 	<artifactId>flink-end-to-end-tests-common</artifactId>
-	<version>1.8-SNAPSHOT</version>
+	<version>1.9-SNAPSHOT</version>
 
 	<dependencies>
 		<dependency>
diff --git a/flink-end-to-end-tests/flink-heavy-deployment-stress-test/pom.xml b/flink-end-to-end-tests/flink-heavy-deployment-stress-test/pom.xml
index 7d1b9b385c8d1..677c7e69bf747 100644
--- a/flink-end-to-end-tests/flink-heavy-deployment-stress-test/pom.xml
+++ b/flink-end-to-end-tests/flink-heavy-deployment-stress-test/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-high-parallelism-iterations-test/pom.xml b/flink-end-to-end-tests/flink-high-parallelism-iterations-test/pom.xml
index cf1297dc484c3..8f8285bbf3488 100644
--- a/flink-end-to-end-tests/flink-high-parallelism-iterations-test/pom.xml
+++ b/flink-end-to-end-tests/flink-high-parallelism-iterations-test/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-local-recovery-and-allocation-test/pom.xml b/flink-end-to-end-tests/flink-local-recovery-and-allocation-test/pom.xml
index 8dc7431bb0580..4b545bf414c8f 100644
--- a/flink-end-to-end-tests/flink-local-recovery-and-allocation-test/pom.xml
+++ b/flink-end-to-end-tests/flink-local-recovery-and-allocation-test/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
diff --git a/flink-end-to-end-tests/flink-metrics-availability-test/pom.xml b/flink-end-to-end-tests/flink-metrics-availability-test/pom.xml
index a6e5f00e38cde..e3ea5720b3e9a 100644
--- a/flink-end-to-end-tests/flink-metrics-availability-test/pom.xml
+++ b/flink-end-to-end-tests/flink-metrics-availability-test/pom.xml
@@ -22,7 +22,7 @@ under the License.
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-metrics-reporter-prometheus-test/pom.xml b/flink-end-to-end-tests/flink-metrics-reporter-prometheus-test/pom.xml
index c6fe838c08443..bdd1a32ce6e28 100644
--- a/flink-end-to-end-tests/flink-metrics-reporter-prometheus-test/pom.xml
+++ b/flink-end-to-end-tests/flink-metrics-reporter-prometheus-test/pom.xml
@@ -22,7 +22,7 @@ under the License.
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-parent-child-classloading-test-lib-package/pom.xml b/flink-end-to-end-tests/flink-parent-child-classloading-test-lib-package/pom.xml
index 760c310dde5cf..10f6f540002e7 100644
--- a/flink-end-to-end-tests/flink-parent-child-classloading-test-lib-package/pom.xml
+++ b/flink-end-to-end-tests/flink-parent-child-classloading-test-lib-package/pom.xml
@@ -29,7 +29,7 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-parent-child-classloading-test-program/pom.xml b/flink-end-to-end-tests/flink-parent-child-classloading-test-program/pom.xml
index cf7bcfe920266..8cdc708faaf39 100644
--- a/flink-end-to-end-tests/flink-parent-child-classloading-test-program/pom.xml
+++ b/flink-end-to-end-tests/flink-parent-child-classloading-test-program/pom.xml
@@ -29,7 +29,7 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-queryable-state-test/pom.xml b/flink-end-to-end-tests/flink-queryable-state-test/pom.xml
index e50a7cddce08b..4ff66763fe8f6 100644
--- a/flink-end-to-end-tests/flink-queryable-state-test/pom.xml
+++ b/flink-end-to-end-tests/flink-queryable-state-test/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
diff --git a/flink-end-to-end-tests/flink-quickstart-test/pom.xml b/flink-end-to-end-tests/flink-quickstart-test/pom.xml
index 47e8dbe97ec57..55eb5b2a4e59d 100644
--- a/flink-end-to-end-tests/flink-quickstart-test/pom.xml
+++ b/flink-end-to-end-tests/flink-quickstart-test/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
diff --git a/flink-end-to-end-tests/flink-sql-client-test/pom.xml b/flink-end-to-end-tests/flink-sql-client-test/pom.xml
index 0e72c097ccdc3..7f556147e07ce 100644
--- a/flink-end-to-end-tests/flink-sql-client-test/pom.xml
+++ b/flink-end-to-end-tests/flink-sql-client-test/pom.xml
@@ -22,7 +22,7 @@ under the License.
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
diff --git a/flink-end-to-end-tests/flink-state-evolution-test/pom.xml b/flink-end-to-end-tests/flink-state-evolution-test/pom.xml
index 300e60a3e8e09..42f04eb694575 100644
--- a/flink-end-to-end-tests/flink-state-evolution-test/pom.xml
+++ b/flink-end-to-end-tests/flink-state-evolution-test/pom.xml
@@ -22,7 +22,7 @@ under the License.
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
diff --git a/flink-end-to-end-tests/flink-stream-sql-test/pom.xml b/flink-end-to-end-tests/flink-stream-sql-test/pom.xml
index e1538418526dd..be50ddf083617 100644
--- a/flink-end-to-end-tests/flink-stream-sql-test/pom.xml
+++ b/flink-end-to-end-tests/flink-stream-sql-test/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-stream-state-ttl-test/pom.xml b/flink-end-to-end-tests/flink-stream-state-ttl-test/pom.xml
index ee09fddfd3472..0ee52f98245fb 100644
--- a/flink-end-to-end-tests/flink-stream-state-ttl-test/pom.xml
+++ b/flink-end-to-end-tests/flink-stream-state-ttl-test/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-stream-stateful-job-upgrade-test/pom.xml b/flink-end-to-end-tests/flink-stream-stateful-job-upgrade-test/pom.xml
index 86cb5b1c23c58..c28002f7f8a87 100644
--- a/flink-end-to-end-tests/flink-stream-stateful-job-upgrade-test/pom.xml
+++ b/flink-end-to-end-tests/flink-stream-stateful-job-upgrade-test/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
diff --git a/flink-end-to-end-tests/flink-streaming-file-sink-test/pom.xml b/flink-end-to-end-tests/flink-streaming-file-sink-test/pom.xml
index 59ba6a466e660..68802fde96633 100644
--- a/flink-end-to-end-tests/flink-streaming-file-sink-test/pom.xml
+++ b/flink-end-to-end-tests/flink-streaming-file-sink-test/pom.xml
@@ -22,7 +22,7 @@ under the License.
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 	</parent>
 
 	<modelVersion>4.0.0</modelVersion>
diff --git a/flink-end-to-end-tests/flink-streaming-kafka-test-base/pom.xml b/flink-end-to-end-tests/flink-streaming-kafka-test-base/pom.xml
index aa69a93c5e3d3..c6277db32e9a4 100644
--- a/flink-end-to-end-tests/flink-streaming-kafka-test-base/pom.xml
+++ b/flink-end-to-end-tests/flink-streaming-kafka-test-base/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
diff --git a/flink-end-to-end-tests/flink-streaming-kafka-test/pom.xml b/flink-end-to-end-tests/flink-streaming-kafka-test/pom.xml
index ac18b6fe1967f..108eb482623b2 100644
--- a/flink-end-to-end-tests/flink-streaming-kafka-test/pom.xml
+++ b/flink-end-to-end-tests/flink-streaming-kafka-test/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
diff --git a/flink-end-to-end-tests/flink-streaming-kafka010-test/pom.xml b/flink-end-to-end-tests/flink-streaming-kafka010-test/pom.xml
index 3f0cf19e57ddd..1ffb1f49ae7bc 100644
--- a/flink-end-to-end-tests/flink-streaming-kafka010-test/pom.xml
+++ b/flink-end-to-end-tests/flink-streaming-kafka010-test/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
diff --git a/flink-end-to-end-tests/flink-streaming-kafka011-test/pom.xml b/flink-end-to-end-tests/flink-streaming-kafka011-test/pom.xml
index 166d5b2dc70a0..742234c617890 100644
--- a/flink-end-to-end-tests/flink-streaming-kafka011-test/pom.xml
+++ b/flink-end-to-end-tests/flink-streaming-kafka011-test/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
diff --git a/flink-end-to-end-tests/pom.xml b/flink-end-to-end-tests/pom.xml
index f6c36dc760a32..94cb5aff87c01 100644
--- a/flink-end-to-end-tests/pom.xml
+++ b/flink-end-to-end-tests/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/flink-examples-batch/pom.xml b/flink-examples/flink-examples-batch/pom.xml
index ae46a6bb63a23..5e8795ec31338 100644
--- a/flink-examples/flink-examples-batch/pom.xml
+++ b/flink-examples/flink-examples-batch/pom.xml
@@ -24,7 +24,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-examples</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/flink-examples-build-helper/flink-examples-streaming-state-machine/pom.xml b/flink-examples/flink-examples-build-helper/flink-examples-streaming-state-machine/pom.xml
index 4400fb834c57a..6c6f779a6006e 100644
--- a/flink-examples/flink-examples-build-helper/flink-examples-streaming-state-machine/pom.xml
+++ b/flink-examples/flink-examples-build-helper/flink-examples-streaming-state-machine/pom.xml
@@ -24,7 +24,7 @@ under the License.
 	<parent>
 		<artifactId>flink-examples-build-helper</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/flink-examples-build-helper/flink-examples-streaming-twitter/pom.xml b/flink-examples/flink-examples-build-helper/flink-examples-streaming-twitter/pom.xml
index a602959100943..3c68d22f31cce 100644
--- a/flink-examples/flink-examples-build-helper/flink-examples-streaming-twitter/pom.xml
+++ b/flink-examples/flink-examples-build-helper/flink-examples-streaming-twitter/pom.xml
@@ -24,7 +24,7 @@ under the License.
 	<parent>
 		<artifactId>flink-examples-build-helper</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/flink-examples-build-helper/pom.xml b/flink-examples/flink-examples-build-helper/pom.xml
index 344057c01a094..6f89161485873 100644
--- a/flink-examples/flink-examples-build-helper/pom.xml
+++ b/flink-examples/flink-examples-build-helper/pom.xml
@@ -24,7 +24,7 @@ under the License.
 	<parent>
 		<artifactId>flink-examples</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/flink-examples-streaming/pom.xml b/flink-examples/flink-examples-streaming/pom.xml
index 0be7fad3e1d35..b51a90eef6b41 100644
--- a/flink-examples/flink-examples-streaming/pom.xml
+++ b/flink-examples/flink-examples-streaming/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-examples</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/flink-examples-table/pom.xml b/flink-examples/flink-examples-table/pom.xml
index 8812eb194ade2..d3373bfeebf9b 100644
--- a/flink-examples/flink-examples-table/pom.xml
+++ b/flink-examples/flink-examples-table/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-examples</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/pom.xml b/flink-examples/pom.xml
index f76652bbffef7..45ebb5a82d254 100644
--- a/flink-examples/pom.xml
+++ b/flink-examples/pom.xml
@@ -24,7 +24,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/flink-fs-hadoop-shaded/pom.xml b/flink-filesystems/flink-fs-hadoop-shaded/pom.xml
index 77e58f98ed202..d503c57918a92 100644
--- a/flink-filesystems/flink-fs-hadoop-shaded/pom.xml
+++ b/flink-filesystems/flink-fs-hadoop-shaded/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/flink-hadoop-fs/pom.xml b/flink-filesystems/flink-hadoop-fs/pom.xml
index 8c2d2ff87cc31..6b34455dd7cb4 100644
--- a/flink-filesystems/flink-hadoop-fs/pom.xml
+++ b/flink-filesystems/flink-hadoop-fs/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/flink-mapr-fs/pom.xml b/flink-filesystems/flink-mapr-fs/pom.xml
index 48d02a4b03f5c..3e4dce8da9d6c 100644
--- a/flink-filesystems/flink-mapr-fs/pom.xml
+++ b/flink-filesystems/flink-mapr-fs/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/flink-oss-fs-hadoop/pom.xml b/flink-filesystems/flink-oss-fs-hadoop/pom.xml
index 8bb3ffdc66b71..f7f94e468a5c2 100644
--- a/flink-filesystems/flink-oss-fs-hadoop/pom.xml
+++ b/flink-filesystems/flink-oss-fs-hadoop/pom.xml
@@ -21,7 +21,7 @@ under the License.
 	<parent>
 		<artifactId>flink-filesystems</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
diff --git a/flink-filesystems/flink-s3-fs-base/pom.xml b/flink-filesystems/flink-s3-fs-base/pom.xml
index f2bdadbc7a8f6..0b640a4197e3a 100644
--- a/flink-filesystems/flink-s3-fs-base/pom.xml
+++ b/flink-filesystems/flink-s3-fs-base/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/flink-s3-fs-hadoop/pom.xml b/flink-filesystems/flink-s3-fs-hadoop/pom.xml
index 530803d6ba87f..9a5a80c053d95 100644
--- a/flink-filesystems/flink-s3-fs-hadoop/pom.xml
+++ b/flink-filesystems/flink-s3-fs-hadoop/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/flink-s3-fs-presto/pom.xml b/flink-filesystems/flink-s3-fs-presto/pom.xml
index 9de885bd24f5d..8f88bbfdac03d 100644
--- a/flink-filesystems/flink-s3-fs-presto/pom.xml
+++ b/flink-filesystems/flink-s3-fs-presto/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/flink-swift-fs-hadoop/pom.xml b/flink-filesystems/flink-swift-fs-hadoop/pom.xml
index 5d3e2eb8873d5..db53d0c680147 100644
--- a/flink-filesystems/flink-swift-fs-hadoop/pom.xml
+++ b/flink-filesystems/flink-swift-fs-hadoop/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/pom.xml b/flink-filesystems/pom.xml
index cde662cd987b6..8da2ceac34bf3 100644
--- a/flink-filesystems/pom.xml
+++ b/flink-filesystems/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-formats/flink-avro-confluent-registry/pom.xml b/flink-formats/flink-avro-confluent-registry/pom.xml
index 4c99f71e54438..9c89167f40f3f 100644
--- a/flink-formats/flink-avro-confluent-registry/pom.xml
+++ b/flink-formats/flink-avro-confluent-registry/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<artifactId>flink-formats</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
diff --git a/flink-formats/flink-avro/pom.xml b/flink-formats/flink-avro/pom.xml
index 6217b4a85c01a..1fd62e062bd17 100644
--- a/flink-formats/flink-avro/pom.xml
+++ b/flink-formats/flink-avro/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-formats</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-formats/flink-csv/pom.xml b/flink-formats/flink-csv/pom.xml
index 361278eb93860..19bf12294a6e8 100644
--- a/flink-formats/flink-csv/pom.xml
+++ b/flink-formats/flink-csv/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-formats</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-formats/flink-json/pom.xml b/flink-formats/flink-json/pom.xml
index f8191b1660485..8fe48c8f99373 100644
--- a/flink-formats/flink-json/pom.xml
+++ b/flink-formats/flink-json/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-formats</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-formats/flink-parquet/pom.xml b/flink-formats/flink-parquet/pom.xml
index 46f1014011a34..4f1c1df0ff1af 100644
--- a/flink-formats/flink-parquet/pom.xml
+++ b/flink-formats/flink-parquet/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-formats</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-formats/flink-sequence-file/pom.xml b/flink-formats/flink-sequence-file/pom.xml
index c1b014596f1ab..701e501f1cb58 100644
--- a/flink-formats/flink-sequence-file/pom.xml
+++ b/flink-formats/flink-sequence-file/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-formats</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-formats/pom.xml b/flink-formats/pom.xml
index 3b8e9d277c997..f44cdce43f922 100644
--- a/flink-formats/pom.xml
+++ b/flink-formats/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-fs-tests/pom.xml b/flink-fs-tests/pom.xml
index a67422a20b492..706c52ac5e753 100644
--- a/flink-fs-tests/pom.xml
+++ b/flink-fs-tests/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-java/pom.xml b/flink-java/pom.xml
index 9afb8f01b4f3d..f91a5a9db3f41 100644
--- a/flink-java/pom.xml
+++ b/flink-java/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/flink-cep-scala/pom.xml b/flink-libraries/flink-cep-scala/pom.xml
index f5edb85b651c5..ae937d68c2ba9 100644
--- a/flink-libraries/flink-cep-scala/pom.xml
+++ b/flink-libraries/flink-cep-scala/pom.xml
@@ -26,7 +26,7 @@ under the License.
     <parent>
         <groupId>org.apache.flink</groupId>
         <artifactId>flink-libraries</artifactId>
-        <version>1.8-SNAPSHOT</version>
+        <version>1.9-SNAPSHOT</version>
         <relativePath>..</relativePath>
     </parent>
     
diff --git a/flink-libraries/flink-cep/pom.xml b/flink-libraries/flink-cep/pom.xml
index 15d1dd8dffd42..86f44a3dea60c 100644
--- a/flink-libraries/flink-cep/pom.xml
+++ b/flink-libraries/flink-cep/pom.xml
@@ -26,7 +26,7 @@ under the License.
     <parent>
         <groupId>org.apache.flink</groupId>
         <artifactId>flink-libraries</artifactId>
-        <version>1.8-SNAPSHOT</version>
+        <version>1.9-SNAPSHOT</version>
         <relativePath>..</relativePath>
     </parent>
 
diff --git a/flink-libraries/flink-gelly-examples/pom.xml b/flink-libraries/flink-gelly-examples/pom.xml
index d7253ac7bd661..d58f0bcc27679 100644
--- a/flink-libraries/flink-gelly-examples/pom.xml
+++ b/flink-libraries/flink-gelly-examples/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-libraries</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/flink-gelly-scala/pom.xml b/flink-libraries/flink-gelly-scala/pom.xml
index ff40aa654db4c..7256086b19953 100644
--- a/flink-libraries/flink-gelly-scala/pom.xml
+++ b/flink-libraries/flink-gelly-scala/pom.xml
@@ -23,7 +23,7 @@ under the License.
     <parent>
         <groupId>org.apache.flink</groupId>
         <artifactId>flink-libraries</artifactId>
-        <version>1.8-SNAPSHOT</version>
+        <version>1.9-SNAPSHOT</version>
         <relativePath>..</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/flink-libraries/flink-gelly/pom.xml b/flink-libraries/flink-gelly/pom.xml
index 3d6daa38369b6..7ed9deba1249b 100644
--- a/flink-libraries/flink-gelly/pom.xml
+++ b/flink-libraries/flink-gelly/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-libraries</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/flink-ml-uber/pom.xml b/flink-libraries/flink-ml-uber/pom.xml
index 61a56071136d7..6931e2573a394 100644
--- a/flink-libraries/flink-ml-uber/pom.xml
+++ b/flink-libraries/flink-ml-uber/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-libraries</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/flink-ml/pom.xml b/flink-libraries/flink-ml/pom.xml
index e53bcd90ffce4..8e6f55c13de2e 100644
--- a/flink-libraries/flink-ml/pom.xml
+++ b/flink-libraries/flink-ml/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-libraries</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/flink-python/pom.xml b/flink-libraries/flink-python/pom.xml
index cf04cf8f3c8bf..110ecb10a38fc 100644
--- a/flink-libraries/flink-python/pom.xml
+++ b/flink-libraries/flink-python/pom.xml
@@ -23,7 +23,7 @@ under the License.
     <parent>
         <groupId>org.apache.flink</groupId>
         <artifactId>flink-libraries</artifactId>
-        <version>1.8-SNAPSHOT</version>
+        <version>1.9-SNAPSHOT</version>
         <relativePath>..</relativePath>
     </parent>
 
diff --git a/flink-libraries/flink-streaming-python/pom.xml b/flink-libraries/flink-streaming-python/pom.xml
index f32056dba6f4e..32af912b0de02 100644
--- a/flink-libraries/flink-streaming-python/pom.xml
+++ b/flink-libraries/flink-streaming-python/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-libraries</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/pom.xml b/flink-libraries/pom.xml
index 66848d858af10..0f86f18722088 100644
--- a/flink-libraries/pom.xml
+++ b/flink-libraries/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-mesos/pom.xml b/flink-mesos/pom.xml
index b51d042e44b53..f41e87bf5c4dd 100644
--- a/flink-mesos/pom.xml
+++ b/flink-mesos/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 	
diff --git a/flink-metrics/flink-metrics-core/pom.xml b/flink-metrics/flink-metrics-core/pom.xml
index 3d97eeaa1842b..8339712b4e88b 100644
--- a/flink-metrics/flink-metrics-core/pom.xml
+++ b/flink-metrics/flink-metrics-core/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-datadog/pom.xml b/flink-metrics/flink-metrics-datadog/pom.xml
index ece71c624fed8..53c24f0356f21 100644
--- a/flink-metrics/flink-metrics-datadog/pom.xml
+++ b/flink-metrics/flink-metrics-datadog/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-dropwizard/pom.xml b/flink-metrics/flink-metrics-dropwizard/pom.xml
index bdbb95d75d50c..7006594b99f76 100644
--- a/flink-metrics/flink-metrics-dropwizard/pom.xml
+++ b/flink-metrics/flink-metrics-dropwizard/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-graphite/pom.xml b/flink-metrics/flink-metrics-graphite/pom.xml
index c8d1f8c8df57e..fe7bd213d026d 100644
--- a/flink-metrics/flink-metrics-graphite/pom.xml
+++ b/flink-metrics/flink-metrics-graphite/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-influxdb/pom.xml b/flink-metrics/flink-metrics-influxdb/pom.xml
index 51ed4a0abfdb2..475e94b7f15e5 100644
--- a/flink-metrics/flink-metrics-influxdb/pom.xml
+++ b/flink-metrics/flink-metrics-influxdb/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-jmx/pom.xml b/flink-metrics/flink-metrics-jmx/pom.xml
index 568675e076734..f5f7285b1ead3 100644
--- a/flink-metrics/flink-metrics-jmx/pom.xml
+++ b/flink-metrics/flink-metrics-jmx/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-prometheus/pom.xml b/flink-metrics/flink-metrics-prometheus/pom.xml
index e705f0e0f8ee9..7c5b37b7e25dd 100644
--- a/flink-metrics/flink-metrics-prometheus/pom.xml
+++ b/flink-metrics/flink-metrics-prometheus/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-slf4j/pom.xml b/flink-metrics/flink-metrics-slf4j/pom.xml
index 781b785191b03..90f18753de08a 100644
--- a/flink-metrics/flink-metrics-slf4j/pom.xml
+++ b/flink-metrics/flink-metrics-slf4j/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-statsd/pom.xml b/flink-metrics/flink-metrics-statsd/pom.xml
index f09d29fccc351..5edeaa5e56bbc 100644
--- a/flink-metrics/flink-metrics-statsd/pom.xml
+++ b/flink-metrics/flink-metrics-statsd/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/pom.xml b/flink-metrics/pom.xml
index 77ea7d1ba3f9e..267dfa7451439 100644
--- a/flink-metrics/pom.xml
+++ b/flink-metrics/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-optimizer/pom.xml b/flink-optimizer/pom.xml
index 0a82ddb521ad4..d979c99b3d291 100644
--- a/flink-optimizer/pom.xml
+++ b/flink-optimizer/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-queryable-state/flink-queryable-state-client-java/pom.xml b/flink-queryable-state/flink-queryable-state-client-java/pom.xml
index 5cd765246e662..1c9d753075f5d 100644
--- a/flink-queryable-state/flink-queryable-state-client-java/pom.xml
+++ b/flink-queryable-state/flink-queryable-state-client-java/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-queryable-state</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-queryable-state/flink-queryable-state-runtime/pom.xml b/flink-queryable-state/flink-queryable-state-runtime/pom.xml
index c834e6681e13a..e32b936a25d6d 100644
--- a/flink-queryable-state/flink-queryable-state-runtime/pom.xml
+++ b/flink-queryable-state/flink-queryable-state-runtime/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-queryable-state</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-queryable-state/pom.xml b/flink-queryable-state/pom.xml
index ee104b31a0a6a..4ab736be0df53 100644
--- a/flink-queryable-state/pom.xml
+++ b/flink-queryable-state/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-quickstart/flink-quickstart-java/pom.xml b/flink-quickstart/flink-quickstart-java/pom.xml
index 8977fcdee29b7..ebcffbdd91eca 100644
--- a/flink-quickstart/flink-quickstart-java/pom.xml
+++ b/flink-quickstart/flink-quickstart-java/pom.xml
@@ -27,7 +27,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-quickstart</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-quickstart/flink-quickstart-scala/pom.xml b/flink-quickstart/flink-quickstart-scala/pom.xml
index 40e5cac4bce86..688ae32af9862 100644
--- a/flink-quickstart/flink-quickstart-scala/pom.xml
+++ b/flink-quickstart/flink-quickstart-scala/pom.xml
@@ -27,7 +27,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-quickstart</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-quickstart/pom.xml b/flink-quickstart/pom.xml
index 8da1048ddaf94..7684ca2c7f1d9 100644
--- a/flink-quickstart/pom.xml
+++ b/flink-quickstart/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-runtime-web/pom.xml b/flink-runtime-web/pom.xml
index 764b69c080fac..b44dfe8995eab 100644
--- a/flink-runtime-web/pom.xml
+++ b/flink-runtime-web/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-runtime/pom.xml b/flink-runtime/pom.xml
index 03b99530a3a4a..bdb34a98569a0 100644
--- a/flink-runtime/pom.xml
+++ b/flink-runtime/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-scala-shell/pom.xml b/flink-scala-shell/pom.xml
index e3530f6b30346..7f7f265a9289e 100644
--- a/flink-scala-shell/pom.xml
+++ b/flink-scala-shell/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-scala/pom.xml b/flink-scala/pom.xml
index 4a8089c3d8f24..02b359cd9a50a 100644
--- a/flink-scala/pom.xml
+++ b/flink-scala/pom.xml
@@ -24,7 +24,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-shaded-curator/pom.xml b/flink-shaded-curator/pom.xml
index a25a418c925eb..786109a0c3de8 100644
--- a/flink-shaded-curator/pom.xml
+++ b/flink-shaded-curator/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-shaded-hadoop/flink-shaded-hadoop2-uber/pom.xml b/flink-shaded-hadoop/flink-shaded-hadoop2-uber/pom.xml
index b9658670667f4..de2890a182182 100644
--- a/flink-shaded-hadoop/flink-shaded-hadoop2-uber/pom.xml
+++ b/flink-shaded-hadoop/flink-shaded-hadoop2-uber/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-shaded-hadoop</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
@@ -34,7 +34,7 @@ under the License.
 	<name>flink-shaded-hadoop2-uber</name>
 
 	<packaging>jar</packaging>
-	<version>1.8-SNAPSHOT-${hadoop.version}</version>
+	<version>1.9-SNAPSHOT-${hadoop.version}</version>
 
 	<!--
 		the only dependency of the 'flink-shaded-hadoop2' artifact, out
diff --git a/flink-shaded-hadoop/flink-shaded-hadoop2/pom.xml b/flink-shaded-hadoop/flink-shaded-hadoop2/pom.xml
index 4f6634cf810f4..722151dba4efd 100644
--- a/flink-shaded-hadoop/flink-shaded-hadoop2/pom.xml
+++ b/flink-shaded-hadoop/flink-shaded-hadoop2/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-shaded-hadoop</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
@@ -33,7 +33,7 @@ under the License.
 	<name>flink-shaded-hadoop2</name>
 
 	<packaging>jar</packaging>
-	<version>1.8-SNAPSHOT-${hadoop.version}</version>
+	<version>1.9-SNAPSHOT-${hadoop.version}</version>
 
 	<dependencies>
 
diff --git a/flink-shaded-hadoop/flink-shaded-yarn-tests/pom.xml b/flink-shaded-hadoop/flink-shaded-yarn-tests/pom.xml
index e1f5b0dcdaa7f..80c1bdcbd1bd0 100644
--- a/flink-shaded-hadoop/flink-shaded-yarn-tests/pom.xml
+++ b/flink-shaded-hadoop/flink-shaded-yarn-tests/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-shaded-hadoop</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-shaded-hadoop/pom.xml b/flink-shaded-hadoop/pom.xml
index c919acf7b3c27..aa4ebcf3dc9c2 100644
--- a/flink-shaded-hadoop/pom.xml
+++ b/flink-shaded-hadoop/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-state-backends/flink-statebackend-rocksdb/pom.xml b/flink-state-backends/flink-statebackend-rocksdb/pom.xml
index b14e152f11841..fe2b943ade3c0 100644
--- a/flink-state-backends/flink-statebackend-rocksdb/pom.xml
+++ b/flink-state-backends/flink-statebackend-rocksdb/pom.xml
@@ -27,7 +27,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-state-backends</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-state-backends/pom.xml b/flink-state-backends/pom.xml
index 2eb161a3ff960..8ae95d8367b4e 100644
--- a/flink-state-backends/pom.xml
+++ b/flink-state-backends/pom.xml
@@ -27,7 +27,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-streaming-java/pom.xml b/flink-streaming-java/pom.xml
index d740928490c12..8be1f67f4aa51 100644
--- a/flink-streaming-java/pom.xml
+++ b/flink-streaming-java/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-streaming-scala/pom.xml b/flink-streaming-scala/pom.xml
index 4adc01b3866bf..9f4aa6c169fb6 100644
--- a/flink-streaming-scala/pom.xml
+++ b/flink-streaming-scala/pom.xml
@@ -24,7 +24,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-sql-client/pom.xml b/flink-table/flink-sql-client/pom.xml
index 39a5439222799..80ee42bcb5350 100644
--- a/flink-table/flink-sql-client/pom.xml
+++ b/flink-table/flink-sql-client/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-table-api-java-bridge/pom.xml b/flink-table/flink-table-api-java-bridge/pom.xml
index 0353a8eee6934..57dc342089317 100644
--- a/flink-table/flink-table-api-java-bridge/pom.xml
+++ b/flink-table/flink-table-api-java-bridge/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-table-api-java/pom.xml b/flink-table/flink-table-api-java/pom.xml
index 4ae3b6f27675d..a6bf656e03fcf 100644
--- a/flink-table/flink-table-api-java/pom.xml
+++ b/flink-table/flink-table-api-java/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-table-api-scala-bridge/pom.xml b/flink-table/flink-table-api-scala-bridge/pom.xml
index 9a4a08e1be8c3..afbad48c56fc8 100644
--- a/flink-table/flink-table-api-scala-bridge/pom.xml
+++ b/flink-table/flink-table-api-scala-bridge/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-table-api-scala/pom.xml b/flink-table/flink-table-api-scala/pom.xml
index edac78967ca61..7fd6f0a28dd3e 100644
--- a/flink-table/flink-table-api-scala/pom.xml
+++ b/flink-table/flink-table-api-scala/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-table-common/pom.xml b/flink-table/flink-table-common/pom.xml
index 09672f642485c..d1f1ee1b5a5b5 100644
--- a/flink-table/flink-table-common/pom.xml
+++ b/flink-table/flink-table-common/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-table-planner/pom.xml b/flink-table/flink-table-planner/pom.xml
index f9063bba7aea0..dc1914eeb4354 100644
--- a/flink-table/flink-table-planner/pom.xml
+++ b/flink-table/flink-table-planner/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-table-uber/pom.xml b/flink-table/flink-table-uber/pom.xml
index c9a73d35f7b7c..7c9b44f5cb27c 100644
--- a/flink-table/flink-table-uber/pom.xml
+++ b/flink-table/flink-table-uber/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/pom.xml b/flink-table/pom.xml
index b1010518a9dfb..5aadad3036ed4 100644
--- a/flink-table/pom.xml
+++ b/flink-table/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-test-utils-parent/flink-test-utils-junit/pom.xml b/flink-test-utils-parent/flink-test-utils-junit/pom.xml
index 9a7066335c6a4..9a7ddd9aef051 100644
--- a/flink-test-utils-parent/flink-test-utils-junit/pom.xml
+++ b/flink-test-utils-parent/flink-test-utils-junit/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-test-utils-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-test-utils-parent/flink-test-utils/pom.xml b/flink-test-utils-parent/flink-test-utils/pom.xml
index 99465f2a1daa4..09bfab89256b8 100644
--- a/flink-test-utils-parent/flink-test-utils/pom.xml
+++ b/flink-test-utils-parent/flink-test-utils/pom.xml
@@ -25,7 +25,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-test-utils-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-test-utils-parent/pom.xml b/flink-test-utils-parent/pom.xml
index 4cc76ccc88f1d..3046552fae20f 100644
--- a/flink-test-utils-parent/pom.xml
+++ b/flink-test-utils-parent/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-tests/pom.xml b/flink-tests/pom.xml
index b1bc0e761e346..2ed6e7edb8aa3 100644
--- a/flink-tests/pom.xml
+++ b/flink-tests/pom.xml
@@ -26,7 +26,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-yarn-tests/pom.xml b/flink-yarn-tests/pom.xml
index c9dd0fa3fdbe6..8019efde81967 100644
--- a/flink-yarn-tests/pom.xml
+++ b/flink-yarn-tests/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-yarn/pom.xml b/flink-yarn/pom.xml
index 683692133c9d7..761c2a2ab48d9 100644
--- a/flink-yarn/pom.xml
+++ b/flink-yarn/pom.xml
@@ -23,7 +23,7 @@ under the License.
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.9-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/pom.xml b/pom.xml
index 8b051e1167caf..f30ea67c25ee5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,7 +28,7 @@ under the License.
 
 	<groupId>org.apache.flink</groupId>
 	<artifactId>flink-parent</artifactId>
-	<version>1.8-SNAPSHOT</version>
+	<version>1.9-SNAPSHOT</version>
 
 	<name>flink</name>
 	<packaging>pom</packaging>
@@ -143,7 +143,7 @@ under the License.
 		<dependency>
 			<groupId>org.apache.flink</groupId>
 			<artifactId>force-shading</artifactId>
-			<version>1.8-SNAPSHOT</version>
+			<version>1.9-SNAPSHOT</version>
 		</dependency>
 
 		<!-- Root dependencies for all projects -->
diff --git a/tools/force-shading/pom.xml b/tools/force-shading/pom.xml
index 1a6c8a147c259..e62e2a1ad67d5 100644
--- a/tools/force-shading/pom.xml
+++ b/tools/force-shading/pom.xml
@@ -38,7 +38,7 @@ under the License.
 
 	<groupId>org.apache.flink</groupId>
 	<artifactId>force-shading</artifactId>
-	<version>1.8-SNAPSHOT</version>
+	<version>1.9-SNAPSHOT</version>
 
 	<packaging>jar</packaging>