Commit for release 1.5.6
diff --git a/docs/_config.yml b/docs/_config.yml
index 0638073..f9c0799 100644
--- a/docs/_config.yml
+++ b/docs/_config.yml
@@ -27,12 +27,12 @@
 # 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: "1.5.4"
+version: "1.5.6"
 # 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: "1.5"
-version_javadocs: "1.5"
-version_scaladocs: "1.5"
+version_title: 1.5
+version_javadocs: 1.5
+version_scaladocs: 1.5
 
 # This suffix is appended to the Scala-dependent Maven artifact names
 scala_version_suffix: "_2.11"
diff --git a/flink-annotations/pom.xml b/flink-annotations/pom.xml
index 7433471..140341c 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-clients/pom.xml b/flink-clients/pom.xml
index c7f9e55..98bfccd 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-cassandra/pom.xml b/flink-connectors/flink-connector-cassandra/pom.xml
index 0fbd968..d344258 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 9694786..e655810 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-elasticsearch/pom.xml b/flink-connectors/flink-connector-elasticsearch/pom.xml
index 5187b14..7e86dd0 100644
--- a/flink-connectors/flink-connector-elasticsearch/pom.xml
+++ b/flink-connectors/flink-connector-elasticsearch/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-connectors</artifactId>
-		<version>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-elasticsearch2/pom.xml b/flink-connectors/flink-connector-elasticsearch2/pom.xml
index 5660219..481ed1d 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-elasticsearch5/pom.xml b/flink-connectors/flink-connector-elasticsearch5/pom.xml
index 16b7cff..5d0f531 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-filesystem/pom.xml b/flink-connectors/flink-connector-filesystem/pom.xml
index f1e7473..ba6c654 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 2d273ae..b84f635 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 089e5a2..59481ff 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 43a9dac..f260787 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 1999a8d..cf75e65 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 cea3896..710f997 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-kinesis/pom.xml b/flink-connectors/flink-connector-kinesis/pom.xml
index c103a95..e527102 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-nifi/pom.xml b/flink-connectors/flink-connector-nifi/pom.xml
index 3fe6f23..e1af9e0 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-rabbitmq/pom.xml b/flink-connectors/flink-connector-rabbitmq/pom.xml
index cc80c95..b153c32 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-connector-twitter/pom.xml b/flink-connectors/flink-connector-twitter/pom.xml
index 8aa8af20..0ed6289 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-hadoop-compatibility/pom.xml b/flink-connectors/flink-hadoop-compatibility/pom.xml
index 468dc0a..b585d82 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-hbase/pom.xml b/flink-connectors/flink-hbase/pom.xml
index 689ef4d..b6b16a6 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-hcatalog/pom.xml b/flink-connectors/flink-hcatalog/pom.xml
index e613dde..948b9bd 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-jdbc/pom.xml b/flink-connectors/flink-jdbc/pom.xml
index 168d173..36728df 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/flink-orc/pom.xml b/flink-connectors/flink-orc/pom.xml
index 2fe229c..5056e4f 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-connectors/pom.xml b/flink-connectors/pom.xml
index 1b77833..8da12ee 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-contrib/flink-connector-wikiedits/pom.xml b/flink-contrib/flink-connector-wikiedits/pom.xml
index 3908658..322dc28 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-contrib/flink-storm-examples/pom.xml b/flink-contrib/flink-storm-examples/pom.xml
index fcd4f4e..24c448f 100644
--- a/flink-contrib/flink-storm-examples/pom.xml
+++ b/flink-contrib/flink-storm-examples/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-contrib</artifactId>
-		<version>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-contrib/flink-storm/pom.xml b/flink-contrib/flink-storm/pom.xml
index 8f25de4..f2bb371 100644
--- a/flink-contrib/flink-storm/pom.xml
+++ b/flink-contrib/flink-storm/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-contrib</artifactId>
-		<version>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-contrib/pom.xml b/flink-contrib/pom.xml
index 644f299..298aeb2 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-core/pom.xml b/flink-core/pom.xml
index b74b03e..194d4b5 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-dist/pom.xml b/flink-dist/pom.xml
index ad00511..9b37a78 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-docs/pom.xml b/flink-docs/pom.xml
index f93466b..ef6c8ab 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 40be10c..ac15967 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 2592117..f07e1ae 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 a58bcc8..7ba2a16 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
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 6ac8e71..e6e87a4 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-end-to-end-tests</artifactId>
-		<version>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 d6a1abf..2a554f1 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 33241b0..8508bcf 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 cc89c1f..0a831c0 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 8ba7ef5..948f09e 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 
diff --git a/flink-end-to-end-tests/flink-parent-child-classloading-test/pom.xml b/flink-end-to-end-tests/flink-parent-child-classloading-test/pom.xml
index f131d29..fe28edf 100644
--- a/flink-end-to-end-tests/flink-parent-child-classloading-test/pom.xml
+++ b/flink-end-to-end-tests/flink-parent-child-classloading-test/pom.xml
@@ -24,7 +24,7 @@
 	<parent>
 		<artifactId>flink-end-to-end-tests</artifactId>
 		<groupId>org.apache.flink</groupId>
-		<version>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
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 2f345a5..27258b6 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 2af8213..af3bc98 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 	</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 04b8532..787ef3a 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/flink-examples-batch/pom.xml b/flink-examples/flink-examples-batch/pom.xml
index e8820eb..040c8b4 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/flink-examples-streaming/pom.xml b/flink-examples/flink-examples-streaming/pom.xml
index 4b496a1..44e2145 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/flink-examples-table/pom.xml b/flink-examples/flink-examples-table/pom.xml
index 91c6a96..e3e836c 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-examples/pom.xml b/flink-examples/pom.xml
index 81584b9..d869ae3 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/flink-hadoop-fs/pom.xml b/flink-filesystems/flink-hadoop-fs/pom.xml
index 425aa2c..d4a76ea 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/flink-mapr-fs/pom.xml b/flink-filesystems/flink-mapr-fs/pom.xml
index d59baaf..0ff019b 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 ca57909..3f5f6b7 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 8ff7561..6e870be 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 66ee6d7..8a5d34b 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-filesystems/pom.xml b/flink-filesystems/pom.xml
index 341348c..5f423ff 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-formats/flink-avro/pom.xml b/flink-formats/flink-avro/pom.xml
index 5676813..38d9a39 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-formats/flink-json/pom.xml b/flink-formats/flink-json/pom.xml
index f7332b9..9bd0cfd 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-formats/pom.xml b/flink-formats/pom.xml
index ad776cf..10fca9f 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-fs-tests/pom.xml b/flink-fs-tests/pom.xml
index 71a69a3..65cc2f7 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-java/pom.xml b/flink-java/pom.xml
index e8dd33b..3877c58 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-java8/pom.xml b/flink-java8/pom.xml
index 273146d..b3083b3 100644
--- a/flink-java8/pom.xml
+++ b/flink-java8/pom.xml
@@ -26,7 +26,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/flink-cep-scala/pom.xml b/flink-libraries/flink-cep-scala/pom.xml
index 0ea9dea..04d8398 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>1.5-SNAPSHOT</version>
+        <version>1.5.6</version>
         <relativePath>..</relativePath>
     </parent>
     
diff --git a/flink-libraries/flink-cep/pom.xml b/flink-libraries/flink-cep/pom.xml
index 4cbdc7f..e3bfe64 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>1.5-SNAPSHOT</version>
+        <version>1.5.6</version>
         <relativePath>..</relativePath>
     </parent>
 
diff --git a/flink-libraries/flink-gelly-examples/pom.xml b/flink-libraries/flink-gelly-examples/pom.xml
index 70e3820..1953183 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/flink-gelly-scala/pom.xml b/flink-libraries/flink-gelly-scala/pom.xml
index 3d14db9..901d50a 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>1.5-SNAPSHOT</version>
+        <version>1.5.6</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 7dd3083..023ddfc 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/flink-ml/pom.xml b/flink-libraries/flink-ml/pom.xml
index bb5e483..7c12981 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/flink-python/pom.xml b/flink-libraries/flink-python/pom.xml
index a8a1d0b..b6d915e 100644
--- a/flink-libraries/flink-python/pom.xml
+++ b/flink-libraries/flink-python/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.flink</groupId>
         <artifactId>flink-libraries</artifactId>
-        <version>1.5-SNAPSHOT</version>
+        <version>1.5.6</version>
         <relativePath>..</relativePath>
     </parent>
 
diff --git a/flink-libraries/flink-sql-client/pom.xml b/flink-libraries/flink-sql-client/pom.xml
index 1a076d8..6d95be3 100644
--- a/flink-libraries/flink-sql-client/pom.xml
+++ b/flink-libraries/flink-sql-client/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-libraries</artifactId>
-		<version>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/flink-streaming-python/pom.xml b/flink-libraries/flink-streaming-python/pom.xml
index a3ae8b7..d1bd6b6 100644
--- a/flink-libraries/flink-streaming-python/pom.xml
+++ b/flink-libraries/flink-streaming-python/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-libraries</artifactId>
-		<version>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/flink-table/pom.xml b/flink-libraries/flink-table/pom.xml
index a3c345a..4a8eb1d 100644
--- a/flink-libraries/flink-table/pom.xml
+++ b/flink-libraries/flink-table/pom.xml
@@ -23,7 +23,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-libraries</artifactId>
-		<version>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-libraries/pom.xml b/flink-libraries/pom.xml
index 6a2e6d7..3352637 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-mesos/pom.xml b/flink-mesos/pom.xml
index 4e1ec76..f276ef8 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 	
diff --git a/flink-metrics/flink-metrics-core/pom.xml b/flink-metrics/flink-metrics-core/pom.xml
index cad9c36..26c4681 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-datadog/pom.xml b/flink-metrics/flink-metrics-datadog/pom.xml
index 3f05fcc..a03de06 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-dropwizard/pom.xml b/flink-metrics/flink-metrics-dropwizard/pom.xml
index 2c44229..ca5f25d 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-ganglia/pom.xml b/flink-metrics/flink-metrics-ganglia/pom.xml
index 427d069..7b3b7c4 100644
--- a/flink-metrics/flink-metrics-ganglia/pom.xml
+++ b/flink-metrics/flink-metrics-ganglia/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-metrics</artifactId>
-		<version>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-graphite/pom.xml b/flink-metrics/flink-metrics-graphite/pom.xml
index c407eae..41b20ed 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-jmx/pom.xml b/flink-metrics/flink-metrics-jmx/pom.xml
index d90595c..dca5f1c 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-prometheus/pom.xml b/flink-metrics/flink-metrics-prometheus/pom.xml
index 26723d8..6d46925 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-slf4j/pom.xml b/flink-metrics/flink-metrics-slf4j/pom.xml
index d610af2..fc3e4f0 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/flink-metrics-statsd/pom.xml b/flink-metrics/flink-metrics-statsd/pom.xml
index 9341987..8fc2210 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-metrics/pom.xml b/flink-metrics/pom.xml
index 8c5020c..edbcb03 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-optimizer/pom.xml b/flink-optimizer/pom.xml
index 53c6996..dc45f17 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 3616d0e..76dae44 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 7c003be..4c2a1fe 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-queryable-state/pom.xml b/flink-queryable-state/pom.xml
index 651b1dc..b828fdf 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-quickstart/flink-quickstart-java/pom.xml b/flink-quickstart/flink-quickstart-java/pom.xml
index ab41e47..267b299 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-quickstart/flink-quickstart-scala/pom.xml b/flink-quickstart/flink-quickstart-scala/pom.xml
index 734a5f9..5ab025e 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-quickstart/pom.xml b/flink-quickstart/pom.xml
index 7878969..1abcc93 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-runtime-web/pom.xml b/flink-runtime-web/pom.xml
index 5890c64..6138719 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-runtime/pom.xml b/flink-runtime/pom.xml
index cb9e995..e42f26b 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-scala-shell/pom.xml b/flink-scala-shell/pom.xml
index 8e0e751..6b48038 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-scala/pom.xml b/flink-scala/pom.xml
index 05d0f67..996330a 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-shaded-curator/pom.xml b/flink-shaded-curator/pom.xml
index 587e475..21b4953 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 2af2dba..c44b4fc 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-shaded-hadoop</artifactId>
-		<version>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-shaded-hadoop/flink-shaded-hadoop2/pom.xml b/flink-shaded-hadoop/flink-shaded-hadoop2/pom.xml
index f842c1c..03cf4d6 100644
--- a/flink-shaded-hadoop/flink-shaded-hadoop2/pom.xml
+++ b/flink-shaded-hadoop/flink-shaded-hadoop2/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-shaded-hadoop</artifactId>
-		<version>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-shaded-hadoop/flink-shaded-yarn-tests/pom.xml b/flink-shaded-hadoop/flink-shaded-yarn-tests/pom.xml
index 65ac699..7e5860e 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 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-shaded-hadoop</artifactId>
-		<version>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-shaded-hadoop/pom.xml b/flink-shaded-hadoop/pom.xml
index 5e147d7..81addfc 100644
--- a/flink-shaded-hadoop/pom.xml
+++ b/flink-shaded-hadoop/pom.xml
@@ -25,7 +25,7 @@
 	<parent>
 		<groupId>org.apache.flink</groupId>
 		<artifactId>flink-parent</artifactId>
-		<version>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 c6a9f92..b1e5921 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-state-backends/pom.xml b/flink-state-backends/pom.xml
index c02ad84f..40dfaf8 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-streaming-java/pom.xml b/flink-streaming-java/pom.xml
index 4338fcd..1326a66 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-streaming-scala/pom.xml b/flink-streaming-scala/pom.xml
index 16a5a21..b6e5b17 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 970fbde..0188512 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</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 d13febc..b538ff3 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-test-utils-parent/pom.xml b/flink-test-utils-parent/pom.xml
index fd5a730..50b2e39 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-tests/pom.xml b/flink-tests/pom.xml
index 9d767a2..9a14e1d 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-yarn-tests/pom.xml b/flink-yarn-tests/pom.xml
index f1d8a4a..e276800 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/flink-yarn/pom.xml b/flink-yarn/pom.xml
index aa5a00a..5d4be68 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>1.5-SNAPSHOT</version>
+		<version>1.5.6</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/pom.xml b/pom.xml
index 01f4d82..7f7ee01 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,7 +28,7 @@
 
 	<groupId>org.apache.flink</groupId>
 	<artifactId>flink-parent</artifactId>
-	<version>1.5-SNAPSHOT</version>
+	<version>1.5.6</version>
 
 	<name>flink</name>
 	<packaging>pom</packaging>
@@ -143,7 +143,7 @@
 		<dependency>
 			<groupId>org.apache.flink</groupId>
 			<artifactId>force-shading</artifactId>
-			<version>1.5-SNAPSHOT</version>
+			<version>1.5.6</version>
 		</dependency>
 
 		<!-- Root dependencies for all projects -->
diff --git a/tools/force-shading/pom.xml b/tools/force-shading/pom.xml
index 9089c07..c0cf2e2 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>1.5-SNAPSHOT</version>
+	<version>1.5.6</version>
 
 	<packaging>jar</packaging>