diff --git a/docs/_config.yml b/docs/_config.yml
index 04a43dd..4ada6cf 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: "1.9.0"
+version: "1.9.1"
 # 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: "1.9"
+version_title: 1.9
 # Branch on Github for this version
 github_branch: "release-1.9"
 
diff --git a/flink-annotations/pom.xml b/flink-annotations/pom.xml
index 6a31aac..fa0f93c 100644
--- a/flink-annotations/pom.xml
+++ b/flink-annotations/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-clients/pom.xml b/flink-clients/pom.xml
index 6476798..93baffe 100644
--- a/flink-clients/pom.xml
+++ b/flink-clients/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-cassandra/pom.xml b/flink-connectors/flink-connector-cassandra/pom.xml
index 6338b18..eb3ff44 100644
--- a/flink-connectors/flink-connector-cassandra/pom.xml
+++ b/flink-connectors/flink-connector-cassandra/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 94761d9..357209d 100644
--- a/flink-connectors/flink-connector-elasticsearch-base/pom.xml
+++ b/flink-connectors/flink-connector-elasticsearch-base/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-elasticsearch2/pom.xml b/flink-connectors/flink-connector-elasticsearch2/pom.xml
index 603af80..035baf8 100644
--- a/flink-connectors/flink-connector-elasticsearch2/pom.xml
+++ b/flink-connectors/flink-connector-elasticsearch2/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-elasticsearch5/pom.xml b/flink-connectors/flink-connector-elasticsearch5/pom.xml
index 0750123..7b70b07 100644
--- a/flink-connectors/flink-connector-elasticsearch5/pom.xml
+++ b/flink-connectors/flink-connector-elasticsearch5/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-elasticsearch6/pom.xml b/flink-connectors/flink-connector-elasticsearch6/pom.xml
index de47b58..030ac73 100644
--- a/flink-connectors/flink-connector-elasticsearch6/pom.xml
+++ b/flink-connectors/flink-connector-elasticsearch6/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-filesystem/pom.xml b/flink-connectors/flink-connector-filesystem/pom.xml
index d6af8f3..2f1ce30 100644
--- a/flink-connectors/flink-connector-filesystem/pom.xml
+++ b/flink-connectors/flink-connector-filesystem/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-gcp-pubsub/pom.xml b/flink-connectors/flink-connector-gcp-pubsub/pom.xml
index 11d12a7..8cc3c16 100644
--- a/flink-connectors/flink-connector-gcp-pubsub/pom.xml
+++ b/flink-connectors/flink-connector-gcp-pubsub/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-hive/pom.xml b/flink-connectors/flink-connector-hive/pom.xml
index a71b80d..9ddb763 100644
--- a/flink-connectors/flink-connector-hive/pom.xml
+++ b/flink-connectors/flink-connector-hive/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 4b18c8f..27e17fb 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 8c69539..3e3fa9c 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 3b63498..35f8474 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 fceb1c3..0b80654 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 f8ea29f..8a4e3d5 100644
--- a/flink-connectors/flink-connector-kafka-base/pom.xml
+++ b/flink-connectors/flink-connector-kafka-base/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-kafka/pom.xml b/flink-connectors/flink-connector-kafka/pom.xml
index 4ca4aa0..d6bf155 100644
--- a/flink-connectors/flink-connector-kafka/pom.xml
+++ b/flink-connectors/flink-connector-kafka/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<artifactId>flink-connectors</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-kinesis/pom.xml b/flink-connectors/flink-connector-kinesis/pom.xml
index fcb9818..70f278d 100644
--- a/flink-connectors/flink-connector-kinesis/pom.xml
+++ b/flink-connectors/flink-connector-kinesis/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-nifi/pom.xml b/flink-connectors/flink-connector-nifi/pom.xml
index 2b1f439..036fdb7 100644
--- a/flink-connectors/flink-connector-nifi/pom.xml
+++ b/flink-connectors/flink-connector-nifi/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-rabbitmq/pom.xml b/flink-connectors/flink-connector-rabbitmq/pom.xml
index 8652376..8d4c685 100644
--- a/flink-connectors/flink-connector-rabbitmq/pom.xml
+++ b/flink-connectors/flink-connector-rabbitmq/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-twitter/pom.xml b/flink-connectors/flink-connector-twitter/pom.xml
index 58365c5..85ee425 100644
--- a/flink-connectors/flink-connector-twitter/pom.xml
+++ b/flink-connectors/flink-connector-twitter/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-hadoop-compatibility/pom.xml b/flink-connectors/flink-hadoop-compatibility/pom.xml
index d6b5d54..9b0da0d 100644
--- a/flink-connectors/flink-hadoop-compatibility/pom.xml
+++ b/flink-connectors/flink-hadoop-compatibility/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-hbase/pom.xml b/flink-connectors/flink-hbase/pom.xml
index 9d9f579..a0a5268 100644
--- a/flink-connectors/flink-hbase/pom.xml
+++ b/flink-connectors/flink-hbase/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-hcatalog/pom.xml b/flink-connectors/flink-hcatalog/pom.xml
index 6a3d159..6d87df5 100644
--- a/flink-connectors/flink-hcatalog/pom.xml
+++ b/flink-connectors/flink-hcatalog/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-jdbc/pom.xml b/flink-connectors/flink-jdbc/pom.xml
index a0d08e7..b9e1d44 100644
--- a/flink-connectors/flink-jdbc/pom.xml
+++ b/flink-connectors/flink-jdbc/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-orc/pom.xml b/flink-connectors/flink-orc/pom.xml
index 5e0f6d1..c1dd038 100644
--- a/flink-connectors/flink-orc/pom.xml
+++ b/flink-connectors/flink-orc/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 66ba7f0..ce73271 100644
--- a/flink-connectors/flink-sql-connector-elasticsearch6/pom.xml
+++ b/flink-connectors/flink-sql-connector-elasticsearch6/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 b3129a6..c700942 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 75a5820..0c8695a 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 bc6726b..dbc142a 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 483dff8..96f6637 100644
--- a/flink-connectors/flink-sql-connector-kafka/pom.xml
+++ b/flink-connectors/flink-sql-connector-kafka/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<artifactId>flink-connectors</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/pom.xml b/flink-connectors/pom.xml
index 2586002..d943e4c 100644
--- a/flink-connectors/pom.xml
+++ b/flink-connectors/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-container/pom.xml b/flink-container/pom.xml
index d225bff..27dc31e 100644
--- a/flink-container/pom.xml
+++ b/flink-container/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-contrib/flink-connector-wikiedits/pom.xml b/flink-contrib/flink-connector-wikiedits/pom.xml
index d04a348..49e7be2 100644
--- a/flink-contrib/flink-connector-wikiedits/pom.xml
+++ b/flink-contrib/flink-connector-wikiedits/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-contrib</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-contrib/pom.xml b/flink-contrib/pom.xml
index 8573c93..12ab4d3 100644
--- a/flink-contrib/pom.xml
+++ b/flink-contrib/pom.xml
@@ -27,7 +27,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-core/pom.xml b/flink-core/pom.xml
index 0768e81..305a3a8 100644
--- a/flink-core/pom.xml
+++ b/flink-core/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-dist/pom.xml b/flink-dist/pom.xml
index 09f200e..a07e426 100644
--- a/flink-dist/pom.xml
+++ b/flink-dist/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-docs/pom.xml b/flink-docs/pom.xml
index 12b09b6..e38d7d3 100644
--- a/flink-docs/pom.xml
+++ b/flink-docs/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-batch-sql-test/pom.xml b/flink-end-to-end-tests/flink-batch-sql-test/pom.xml
index 3ffd080..f84bf79 100644
--- a/flink-end-to-end-tests/flink-batch-sql-test/pom.xml
+++ b/flink-end-to-end-tests/flink-batch-sql-test/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 6f66159..41ff06b 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>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 c738d08..c2447dd 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>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 12d4950..e4243b9 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 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
diff --git a/flink-end-to-end-tests/flink-connector-gcp-pubsub-emulator-tests/pom.xml b/flink-end-to-end-tests/flink-connector-gcp-pubsub-emulator-tests/pom.xml
index d7f3fc6..7c06cef 100644
--- a/flink-end-to-end-tests/flink-connector-gcp-pubsub-emulator-tests/pom.xml
+++ b/flink-end-to-end-tests/flink-connector-gcp-pubsub-emulator-tests/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
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 4baf81a..9b25ad3 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-dataset-fine-grained-recovery-test/pom.xml b/flink-end-to-end-tests/flink-dataset-fine-grained-recovery-test/pom.xml
index 653ab3c..baf3e0f 100644
--- a/flink-end-to-end-tests/flink-dataset-fine-grained-recovery-test/pom.xml
+++ b/flink-end-to-end-tests/flink-dataset-fine-grained-recovery-test/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 3f74400..f5302c9 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 b6a3764..8fa4f73 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>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 b68ca25..69e0522 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 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
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 aad082a..b051ae6 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 259627b..736aaba 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 5e19895..52a44fd 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 791f806..3164435 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
@@ -22,7 +22,7 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 	</parent>
 
 	<modelVersion>4.0.0</modelVersion>
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 677c7e6..e4e8c1e 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 8f8285b..6cd12ca 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 4b545bf4..0d2108b 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 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 e3ea572..f59c4c1 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 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 bdd1a32..446801a 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 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 10f6f54..729f297 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>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 8cdc708..c4e648c 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>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-end-to-end-tests/flink-plugins-test/pom.xml b/flink-end-to-end-tests/flink-plugins-test/pom.xml
index 1c68fbb..d3965ef 100644
--- a/flink-end-to-end-tests/flink-plugins-test/pom.xml
+++ b/flink-end-to-end-tests/flink-plugins-test/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
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 bc72df7..baf2be0 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>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 55eb5b2..251cdfd 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 ea4a74e..0430165 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 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 42f04eb..95c5c7f 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 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 776b7fe..d36710e 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>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 0ee52f9..ff6557d 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 c28002f..e8a891c 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 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 68802fd..e985dac 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 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 c6277db..5969201 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 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 108eb48..c626c0f 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 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 1ffb1f4..85790b4 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 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 742234c..1f978a7 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 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
diff --git a/flink-end-to-end-tests/flink-streaming-kinesis-test/pom.xml b/flink-end-to-end-tests/flink-streaming-kinesis-test/pom.xml
index d16f25f..6199628 100644
--- a/flink-end-to-end-tests/flink-streaming-kinesis-test/pom.xml
+++ b/flink-end-to-end-tests/flink-streaming-kinesis-test/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
diff --git a/flink-end-to-end-tests/flink-tpch-test/pom.xml b/flink-end-to-end-tests/flink-tpch-test/pom.xml
index 9e16ff1..c279034 100644
--- a/flink-end-to-end-tests/flink-tpch-test/pom.xml
+++ b/flink-end-to-end-tests/flink-tpch-test/pom.xml
@@ -21,7 +21,7 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 b7c2dc2..254aa31 100644
--- a/flink-end-to-end-tests/pom.xml
+++ b/flink-end-to-end-tests/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/flink-examples-batch/pom.xml b/flink-examples/flink-examples-batch/pom.xml
index c4d4927..2f47eb6 100644
--- a/flink-examples/flink-examples-batch/pom.xml
+++ b/flink-examples/flink-examples-batch/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-examples</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/flink-examples-build-helper/flink-examples-streaming-gcp-pubsub/pom.xml b/flink-examples/flink-examples-build-helper/flink-examples-streaming-gcp-pubsub/pom.xml
index ab1c91f..b491d79 100644
--- a/flink-examples/flink-examples-build-helper/flink-examples-streaming-gcp-pubsub/pom.xml
+++ b/flink-examples/flink-examples-build-helper/flink-examples-streaming-gcp-pubsub/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<artifactId>flink-examples-build-helper</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 6c6f779..3615f73 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 @@
 	<parent>
 		<artifactId>flink-examples-build-helper</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 3c68d22..d5a0828 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 @@
 	<parent>
 		<artifactId>flink-examples-build-helper</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 456de28..1e82d0b 100644
--- a/flink-examples/flink-examples-build-helper/pom.xml
+++ b/flink-examples/flink-examples-build-helper/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<artifactId>flink-examples</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/flink-examples-streaming/pom.xml b/flink-examples/flink-examples-streaming/pom.xml
index 814db15..5af6dc6 100644
--- a/flink-examples/flink-examples-streaming/pom.xml
+++ b/flink-examples/flink-examples-streaming/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-examples</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/flink-examples-table/pom.xml b/flink-examples/flink-examples-table/pom.xml
index 83db8e3..1437c36 100644
--- a/flink-examples/flink-examples-table/pom.xml
+++ b/flink-examples/flink-examples-table/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-examples</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/pom.xml b/flink-examples/pom.xml
index c76e9f9..742b958 100644
--- a/flink-examples/pom.xml
+++ b/flink-examples/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/flink-azure-fs-hadoop/pom.xml b/flink-filesystems/flink-azure-fs-hadoop/pom.xml
index 781e851..caf4083 100644
--- a/flink-filesystems/flink-azure-fs-hadoop/pom.xml
+++ b/flink-filesystems/flink-azure-fs-hadoop/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 d503c57..1262a63 100644
--- a/flink-filesystems/flink-fs-hadoop-shaded/pom.xml
+++ b/flink-filesystems/flink-fs-hadoop-shaded/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/flink-hadoop-fs/pom.xml b/flink-filesystems/flink-hadoop-fs/pom.xml
index 89ee4d4..e7f9fb5 100644
--- a/flink-filesystems/flink-hadoop-fs/pom.xml
+++ b/flink-filesystems/flink-hadoop-fs/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/flink-mapr-fs/pom.xml b/flink-filesystems/flink-mapr-fs/pom.xml
index dfa9d89..1831972 100644
--- a/flink-filesystems/flink-mapr-fs/pom.xml
+++ b/flink-filesystems/flink-mapr-fs/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 f7f94e4..5107239 100644
--- a/flink-filesystems/flink-oss-fs-hadoop/pom.xml
+++ b/flink-filesystems/flink-oss-fs-hadoop/pom.xml
@@ -21,7 +21,7 @@
 	<parent>
 		<artifactId>flink-filesystems</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 00d4086..6095229 100644
--- a/flink-filesystems/flink-s3-fs-base/pom.xml
+++ b/flink-filesystems/flink-s3-fs-base/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 e7cf95e..737c2fd 100644
--- a/flink-filesystems/flink-s3-fs-hadoop/pom.xml
+++ b/flink-filesystems/flink-s3-fs-hadoop/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 3fc8e03..9bbb1a2 100644
--- a/flink-filesystems/flink-s3-fs-presto/pom.xml
+++ b/flink-filesystems/flink-s3-fs-presto/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 42c3839..37a7cc5 100644
--- a/flink-filesystems/flink-swift-fs-hadoop/pom.xml
+++ b/flink-filesystems/flink-swift-fs-hadoop/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-filesystems</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/pom.xml b/flink-filesystems/pom.xml
index c84e853..f067c17 100644
--- a/flink-filesystems/pom.xml
+++ b/flink-filesystems/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 aa6382f..9345087 100644
--- a/flink-formats/flink-avro-confluent-registry/pom.xml
+++ b/flink-formats/flink-avro-confluent-registry/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<artifactId>flink-formats</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
diff --git a/flink-formats/flink-avro/pom.xml b/flink-formats/flink-avro/pom.xml
index 1fd62e0..cedf446 100644
--- a/flink-formats/flink-avro/pom.xml
+++ b/flink-formats/flink-avro/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-formats</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-formats/flink-csv/pom.xml b/flink-formats/flink-csv/pom.xml
index 5ca4d62..b595f03 100644
--- a/flink-formats/flink-csv/pom.xml
+++ b/flink-formats/flink-csv/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-formats</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-formats/flink-json/pom.xml b/flink-formats/flink-json/pom.xml
index 8fe48c8..968d198 100644
--- a/flink-formats/flink-json/pom.xml
+++ b/flink-formats/flink-json/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-formats</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-formats/flink-parquet/pom.xml b/flink-formats/flink-parquet/pom.xml
index b43715d..44fc42d 100644
--- a/flink-formats/flink-parquet/pom.xml
+++ b/flink-formats/flink-parquet/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-formats</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-formats/flink-sequence-file/pom.xml b/flink-formats/flink-sequence-file/pom.xml
index 545f9d3..a1b2701 100644
--- a/flink-formats/flink-sequence-file/pom.xml
+++ b/flink-formats/flink-sequence-file/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-formats</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-formats/pom.xml b/flink-formats/pom.xml
index f44cdce..4443fdd 100644
--- a/flink-formats/pom.xml
+++ b/flink-formats/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-fs-tests/pom.xml b/flink-fs-tests/pom.xml
index f7a845e..e201f04 100644
--- a/flink-fs-tests/pom.xml
+++ b/flink-fs-tests/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-java/pom.xml b/flink-java/pom.xml
index 3d633f4..2bcd073 100644
--- a/flink-java/pom.xml
+++ b/flink-java/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/flink-cep-scala/pom.xml b/flink-libraries/flink-cep-scala/pom.xml
index e19735f..4b367f2 100644
--- a/flink-libraries/flink-cep-scala/pom.xml
+++ b/flink-libraries/flink-cep-scala/pom.xml
@@ -26,7 +26,7 @@
     <parent>
         <groupId>org.apache.flink</groupId>
         <artifactId>flink-libraries</artifactId>
-        <version>1.9-SNAPSHOT</version>
+        <version>1.9.1</version>
         <relativePath>..</relativePath>
     </parent>
     
diff --git a/flink-libraries/flink-cep/pom.xml b/flink-libraries/flink-cep/pom.xml
index 86f44a3..5b9b35b 100644
--- a/flink-libraries/flink-cep/pom.xml
+++ b/flink-libraries/flink-cep/pom.xml
@@ -26,7 +26,7 @@
     <parent>
         <groupId>org.apache.flink</groupId>
         <artifactId>flink-libraries</artifactId>
-        <version>1.9-SNAPSHOT</version>
+        <version>1.9.1</version>
         <relativePath>..</relativePath>
     </parent>
 
diff --git a/flink-libraries/flink-gelly-examples/pom.xml b/flink-libraries/flink-gelly-examples/pom.xml
index 5eca560..8b68dad 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>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/flink-gelly-scala/pom.xml b/flink-libraries/flink-gelly-scala/pom.xml
index d679ad0..7a31fe1 100644
--- a/flink-libraries/flink-gelly-scala/pom.xml
+++ b/flink-libraries/flink-gelly-scala/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.flink</groupId>
         <artifactId>flink-libraries</artifactId>
-        <version>1.9-SNAPSHOT</version>
+        <version>1.9.1</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 7ed9deb..62b8ae9 100644
--- a/flink-libraries/flink-gelly/pom.xml
+++ b/flink-libraries/flink-gelly/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-libraries</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/flink-state-processing-api/pom.xml b/flink-libraries/flink-state-processing-api/pom.xml
index f136017..8e881b9 100644
--- a/flink-libraries/flink-state-processing-api/pom.xml
+++ b/flink-libraries/flink-state-processing-api/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-libraries</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/pom.xml b/flink-libraries/pom.xml
index 9c4e63f..390f9d7 100644
--- a/flink-libraries/pom.xml
+++ b/flink-libraries/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-mesos/pom.xml b/flink-mesos/pom.xml
index 9c496a0..ee10356 100644
--- a/flink-mesos/pom.xml
+++ b/flink-mesos/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 	
diff --git a/flink-metrics/flink-metrics-core/pom.xml b/flink-metrics/flink-metrics-core/pom.xml
index 8339712..1b831e9 100644
--- a/flink-metrics/flink-metrics-core/pom.xml
+++ b/flink-metrics/flink-metrics-core/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-datadog/pom.xml b/flink-metrics/flink-metrics-datadog/pom.xml
index 53c24f0..a6e8f24 100644
--- a/flink-metrics/flink-metrics-datadog/pom.xml
+++ b/flink-metrics/flink-metrics-datadog/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-dropwizard/pom.xml b/flink-metrics/flink-metrics-dropwizard/pom.xml
index 7006594..fc9240d 100644
--- a/flink-metrics/flink-metrics-dropwizard/pom.xml
+++ b/flink-metrics/flink-metrics-dropwizard/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-graphite/pom.xml b/flink-metrics/flink-metrics-graphite/pom.xml
index fe7bd21..8fa47cf 100644
--- a/flink-metrics/flink-metrics-graphite/pom.xml
+++ b/flink-metrics/flink-metrics-graphite/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-influxdb/pom.xml b/flink-metrics/flink-metrics-influxdb/pom.xml
index 475e94b..11d166c 100644
--- a/flink-metrics/flink-metrics-influxdb/pom.xml
+++ b/flink-metrics/flink-metrics-influxdb/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-jmx/pom.xml b/flink-metrics/flink-metrics-jmx/pom.xml
index f5f7285..160d7c2 100644
--- a/flink-metrics/flink-metrics-jmx/pom.xml
+++ b/flink-metrics/flink-metrics-jmx/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-prometheus/pom.xml b/flink-metrics/flink-metrics-prometheus/pom.xml
index 7c5b37b..58dccc9 100644
--- a/flink-metrics/flink-metrics-prometheus/pom.xml
+++ b/flink-metrics/flink-metrics-prometheus/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-slf4j/pom.xml b/flink-metrics/flink-metrics-slf4j/pom.xml
index 90f1875..9d50559 100644
--- a/flink-metrics/flink-metrics-slf4j/pom.xml
+++ b/flink-metrics/flink-metrics-slf4j/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-statsd/pom.xml b/flink-metrics/flink-metrics-statsd/pom.xml
index 5edeaa5..9ab29f4 100644
--- a/flink-metrics/flink-metrics-statsd/pom.xml
+++ b/flink-metrics/flink-metrics-statsd/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/pom.xml b/flink-metrics/pom.xml
index 267dfa7..4882a28 100644
--- a/flink-metrics/pom.xml
+++ b/flink-metrics/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-ml-parent/flink-ml-api/pom.xml b/flink-ml-parent/flink-ml-api/pom.xml
index f77f068..ce011d9 100644
--- a/flink-ml-parent/flink-ml-api/pom.xml
+++ b/flink-ml-parent/flink-ml-api/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-ml-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 	</parent>
 
 	<artifactId>flink-ml-api</artifactId>
diff --git a/flink-ml-parent/flink-ml-lib/pom.xml b/flink-ml-parent/flink-ml-lib/pom.xml
index 00b0db2..24c7e7b 100644
--- a/flink-ml-parent/flink-ml-lib/pom.xml
+++ b/flink-ml-parent/flink-ml-lib/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-ml-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 	</parent>
 
 	<artifactId>flink-ml-lib</artifactId>
diff --git a/flink-ml-parent/pom.xml b/flink-ml-parent/pom.xml
index ccf4471..2ccdb14 100644
--- a/flink-ml-parent/pom.xml
+++ b/flink-ml-parent/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-optimizer/pom.xml b/flink-optimizer/pom.xml
index d979c99..ca06a60 100644
--- a/flink-optimizer/pom.xml
+++ b/flink-optimizer/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-python/pom.xml b/flink-python/pom.xml
index 9bb50f1..7fe9685 100644
--- a/flink-python/pom.xml
+++ b/flink-python/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<artifactId>flink-parent</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 3b28707..c85e530 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-queryable-state</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 fdadf9f..136c87a 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-queryable-state</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-queryable-state/pom.xml b/flink-queryable-state/pom.xml
index 4ab736b..1bc1cac 100644
--- a/flink-queryable-state/pom.xml
+++ b/flink-queryable-state/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-quickstart/flink-quickstart-java/pom.xml b/flink-quickstart/flink-quickstart-java/pom.xml
index ebcffbd..939dbc8 100644
--- a/flink-quickstart/flink-quickstart-java/pom.xml
+++ b/flink-quickstart/flink-quickstart-java/pom.xml
@@ -27,7 +27,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-quickstart</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-quickstart/flink-quickstart-scala/pom.xml b/flink-quickstart/flink-quickstart-scala/pom.xml
index 688ae32..9df1999 100644
--- a/flink-quickstart/flink-quickstart-scala/pom.xml
+++ b/flink-quickstart/flink-quickstart-scala/pom.xml
@@ -27,7 +27,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-quickstart</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-quickstart/pom.xml b/flink-quickstart/pom.xml
index 7684ca2..75423dc 100644
--- a/flink-quickstart/pom.xml
+++ b/flink-quickstart/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-runtime-web/pom.xml b/flink-runtime-web/pom.xml
index 5207ab8..63e706e 100644
--- a/flink-runtime-web/pom.xml
+++ b/flink-runtime-web/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-runtime/pom.xml b/flink-runtime/pom.xml
index b97e1db..07486bb 100644
--- a/flink-runtime/pom.xml
+++ b/flink-runtime/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-scala-shell/pom.xml b/flink-scala-shell/pom.xml
index 10a2c82..85fdbe5 100644
--- a/flink-scala-shell/pom.xml
+++ b/flink-scala-shell/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-scala/pom.xml b/flink-scala/pom.xml
index 29027a9..570ded1 100644
--- a/flink-scala/pom.xml
+++ b/flink-scala/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-shaded-curator/pom.xml b/flink-shaded-curator/pom.xml
index 786109a..630a437 100644
--- a/flink-shaded-curator/pom.xml
+++ b/flink-shaded-curator/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 fe2b943..d453219 100644
--- a/flink-state-backends/flink-statebackend-rocksdb/pom.xml
+++ b/flink-state-backends/flink-statebackend-rocksdb/pom.xml
@@ -27,7 +27,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-state-backends</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-state-backends/pom.xml b/flink-state-backends/pom.xml
index 8ae95d8..63ee84a 100644
--- a/flink-state-backends/pom.xml
+++ b/flink-state-backends/pom.xml
@@ -27,7 +27,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-streaming-java/pom.xml b/flink-streaming-java/pom.xml
index 78e6805..526c0ff 100644
--- a/flink-streaming-java/pom.xml
+++ b/flink-streaming-java/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-streaming-scala/pom.xml b/flink-streaming-scala/pom.xml
index 489592f..9ae1ea7 100644
--- a/flink-streaming-scala/pom.xml
+++ b/flink-streaming-scala/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-sql-client/pom.xml b/flink-table/flink-sql-client/pom.xml
index 83330ab..ae2a066 100644
--- a/flink-table/flink-sql-client/pom.xml
+++ b/flink-table/flink-sql-client/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-sql-parser/pom.xml b/flink-table/flink-sql-parser/pom.xml
index 2c5a7ce..8027b74 100644
--- a/flink-table/flink-sql-parser/pom.xml
+++ b/flink-table/flink-sql-parser/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<artifactId>flink-table</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 	</parent>
 
 	<artifactId>flink-sql-parser</artifactId>
diff --git a/flink-table/flink-table-api-java-bridge/pom.xml b/flink-table/flink-table-api-java-bridge/pom.xml
index 57dc342..034790e 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 91a369c..1923b71 100644
--- a/flink-table/flink-table-api-java/pom.xml
+++ b/flink-table/flink-table-api-java/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 f49f71c..d9f4f32 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 b16a5d1..acc541e 100644
--- a/flink-table/flink-table-api-scala/pom.xml
+++ b/flink-table/flink-table-api-scala/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-table-common/pom.xml b/flink-table/flink-table-common/pom.xml
index d1f1ee1..ad5b5aa 100644
--- a/flink-table/flink-table-common/pom.xml
+++ b/flink-table/flink-table-common/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-table-planner-blink/pom.xml b/flink-table/flink-table-planner-blink/pom.xml
index 5325c64..0a337c0 100644
--- a/flink-table/flink-table-planner-blink/pom.xml
+++ b/flink-table/flink-table-planner-blink/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-table-planner/pom.xml b/flink-table/flink-table-planner/pom.xml
index ea4e4fc..c214dae 100644
--- a/flink-table/flink-table-planner/pom.xml
+++ b/flink-table/flink-table-planner/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-table-runtime-blink/pom.xml b/flink-table/flink-table-runtime-blink/pom.xml
index abe2402..6b1114e 100644
--- a/flink-table/flink-table-runtime-blink/pom.xml
+++ b/flink-table/flink-table-runtime-blink/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-table-uber-blink/pom.xml b/flink-table/flink-table-uber-blink/pom.xml
index 1b91b9a..1c879c4 100644
--- a/flink-table/flink-table-uber-blink/pom.xml
+++ b/flink-table/flink-table-uber-blink/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/flink-table-uber/pom.xml b/flink-table/flink-table-uber/pom.xml
index de4efa0..de1e9d9 100644
--- a/flink-table/flink-table-uber/pom.xml
+++ b/flink-table/flink-table-uber/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-table</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-table/pom.xml b/flink-table/pom.xml
index ed97302..c560aeb 100644
--- a/flink-table/pom.xml
+++ b/flink-table/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 9a7ddd9..1b9c160 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-test-utils-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</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 09bfab8..947aa0d 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-test-utils-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-test-utils-parent/pom.xml b/flink-test-utils-parent/pom.xml
index 3046552..be6c7a6 100644
--- a/flink-test-utils-parent/pom.xml
+++ b/flink-test-utils-parent/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-tests/pom.xml b/flink-tests/pom.xml
index d3e6a49..6492ec0 100644
--- a/flink-tests/pom.xml
+++ b/flink-tests/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-yarn-tests/pom.xml b/flink-yarn-tests/pom.xml
index 6c0b2cb..207c3bb 100644
--- a/flink-yarn-tests/pom.xml
+++ b/flink-yarn-tests/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-yarn/pom.xml b/flink-yarn/pom.xml
index bbccefb..d104ddb 100644
--- a/flink-yarn/pom.xml
+++ b/flink-yarn/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.9-SNAPSHOT</version>
+		<version>1.9.1</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/pom.xml b/pom.xml
index b1fc076..ae20913 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,7 +28,7 @@
 
 	<groupId>org.apache.flink</groupId>
 	<artifactId>flink-parent</artifactId>
-	<version>1.9-SNAPSHOT</version>
+	<version>1.9.1</version>
 
 	<name>flink</name>
 	<packaging>pom</packaging>
@@ -154,7 +154,7 @@
 		<dependency>
 			<groupId>org.apache.flink</groupId>
 			<artifactId>force-shading</artifactId>
-			<version>1.9-SNAPSHOT</version>
+			<version>1.9.1</version>
 		</dependency>
 
 		<!-- Root dependencies for all projects -->
diff --git a/tools/force-shading/pom.xml b/tools/force-shading/pom.xml
index e62e2a1..0588b73 100644
--- a/tools/force-shading/pom.xml
+++ b/tools/force-shading/pom.xml
@@ -38,7 +38,7 @@
 
 	<groupId>org.apache.flink</groupId>
 	<artifactId>force-shading</artifactId>
-	<version>1.9-SNAPSHOT</version>
+	<version>1.9.1</version>
 
 	<packaging>jar</packaging>