Prepare for releasing 0.12.1
diff --git a/pom.xml b/pom.xml
index 79fc494..f53d09d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -29,7 +29,7 @@
 
     <groupId>org.apache.twill</groupId>
     <artifactId>twill-parent</artifactId>
-    <version>0.12.0</version>
+    <version>0.12.1</version>
     <packaging>pom</packaging>
     <name>Apache Twill</name>
     <url>http://twill.apache.org</url>
diff --git a/twill-api/pom.xml b/twill-api/pom.xml
index 8306f66..36d49da 100644
--- a/twill-api/pom.xml
+++ b/twill-api/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.twill</groupId>
         <artifactId>twill-parent</artifactId>
-        <version>0.12.0</version>
+        <version>0.12.1</version>
     </parent>
 
     <artifactId>twill-api</artifactId>
diff --git a/twill-common/pom.xml b/twill-common/pom.xml
index 5902a1e..86a37a3 100644
--- a/twill-common/pom.xml
+++ b/twill-common/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>twill-parent</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.12.0</version>
+        <version>0.12.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/twill-core/pom.xml b/twill-core/pom.xml
index 742e077..ffb36dd 100644
--- a/twill-core/pom.xml
+++ b/twill-core/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>twill-parent</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.12.0</version>
+        <version>0.12.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/twill-discovery-api/pom.xml b/twill-discovery-api/pom.xml
index 20ed5de..f216a35 100644
--- a/twill-discovery-api/pom.xml
+++ b/twill-discovery-api/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>twill-parent</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.12.0</version>
+        <version>0.12.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/twill-discovery-core/pom.xml b/twill-discovery-core/pom.xml
index e7c949b..c9dee83 100644
--- a/twill-discovery-core/pom.xml
+++ b/twill-discovery-core/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>twill-parent</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.12.0</version>
+        <version>0.12.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/twill-examples/echo/pom.xml b/twill-examples/echo/pom.xml
index 9710652..b80db93 100644
--- a/twill-examples/echo/pom.xml
+++ b/twill-examples/echo/pom.xml
@@ -25,7 +25,7 @@
     <parent>
         <artifactId>twill-examples</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.12.0</version>
+        <version>0.12.1</version>
     </parent>
 
     <name>Apache Twill examples: Echo</name>
diff --git a/twill-examples/pom.xml b/twill-examples/pom.xml
index df28f16..fa0a0b1 100644
--- a/twill-examples/pom.xml
+++ b/twill-examples/pom.xml
@@ -25,7 +25,7 @@
     <parent>
         <groupId>org.apache.twill</groupId>
         <artifactId>twill-parent</artifactId>
-        <version>0.12.0</version>
+        <version>0.12.1</version>
     </parent>
 
     <artifactId>twill-examples</artifactId>
diff --git a/twill-examples/yarn/pom.xml b/twill-examples/yarn/pom.xml
index 7b93384..954e3ff 100644
--- a/twill-examples/yarn/pom.xml
+++ b/twill-examples/yarn/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <artifactId>twill-examples</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.12.0</version>
+        <version>0.12.1</version>
     </parent>
 
     <name>Apache Twill examples: YARN</name>
diff --git a/twill-ext/pom.xml b/twill-ext/pom.xml
index cacb03e..c3423d6 100644
--- a/twill-ext/pom.xml
+++ b/twill-ext/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>twill-parent</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.12.0</version>
+        <version>0.12.1</version>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
diff --git a/twill-java8-test/pom.xml b/twill-java8-test/pom.xml
index 36b21fd..0d29db9 100644
--- a/twill-java8-test/pom.xml
+++ b/twill-java8-test/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.twill</groupId>
         <artifactId>twill-parent</artifactId>
-        <version>0.12.0</version>
+        <version>0.12.1</version>
     </parent>
 
     <artifactId>twill-java8-test</artifactId>
diff --git a/twill-yarn/pom.xml b/twill-yarn/pom.xml
index 266477b..f8c88d3 100644
--- a/twill-yarn/pom.xml
+++ b/twill-yarn/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>twill-parent</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.12.0</version>
+        <version>0.12.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/twill-zookeeper/pom.xml b/twill-zookeeper/pom.xml
index 3af004e..ca6cbc1 100644
--- a/twill-zookeeper/pom.xml
+++ b/twill-zookeeper/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>twill-parent</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.12.0</version>
+        <version>0.12.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>