[maven-release-plugin] prepare release druid-0.21.0-rc1
diff --git a/benchmarks/pom.xml b/benchmarks/pom.xml
index 960d0e6..44d6d89 100644
--- a/benchmarks/pom.xml
+++ b/benchmarks/pom.xml
@@ -27,7 +27,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
   </parent>
 
   <prerequisites>
diff --git a/cloud/aws-common/pom.xml b/cloud/aws-common/pom.xml
index a861ee3..affdf5c 100644
--- a/cloud/aws-common/pom.xml
+++ b/cloud/aws-common/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/cloud/gcp-common/pom.xml b/cloud/gcp-common/pom.xml
index 93abd3d..3d5e535 100644
--- a/cloud/gcp-common/pom.xml
+++ b/cloud/gcp-common/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/core/pom.xml b/core/pom.xml
index 72fea54..a7235e7 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <artifactId>druid</artifactId>
     <groupId>org.apache.druid</groupId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
   </parent>
 
   <properties>
diff --git a/distribution/pom.xml b/distribution/pom.xml
index 2753bad..b2a87fa 100644
--- a/distribution/pom.xml
+++ b/distribution/pom.xml
@@ -30,7 +30,7 @@
     <parent>
         <artifactId>druid</artifactId>
         <groupId>org.apache.druid</groupId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
     </parent>
 
     <dependencies>
diff --git a/extendedset/pom.xml b/extendedset/pom.xml
index 1edce77..a012eb9 100755
--- a/extendedset/pom.xml
+++ b/extendedset/pom.xml
@@ -31,7 +31,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
   </parent>
 
   <dependencies>
diff --git a/extensions-contrib/aliyun-oss-extensions/pom.xml b/extensions-contrib/aliyun-oss-extensions/pom.xml
index 190767e..1678b1c 100644
--- a/extensions-contrib/aliyun-oss-extensions/pom.xml
+++ b/extensions-contrib/aliyun-oss-extensions/pom.xml
@@ -28,7 +28,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
   
diff --git a/extensions-contrib/ambari-metrics-emitter/pom.xml b/extensions-contrib/ambari-metrics-emitter/pom.xml
index b5c4a76..bf3c95d 100644
--- a/extensions-contrib/ambari-metrics-emitter/pom.xml
+++ b/extensions-contrib/ambari-metrics-emitter/pom.xml
@@ -24,7 +24,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-contrib/cassandra-storage/pom.xml b/extensions-contrib/cassandra-storage/pom.xml
index e91603a..1c46f6f 100644
--- a/extensions-contrib/cassandra-storage/pom.xml
+++ b/extensions-contrib/cassandra-storage/pom.xml
@@ -29,7 +29,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-contrib/cloudfiles-extensions/pom.xml b/extensions-contrib/cloudfiles-extensions/pom.xml
index 04d7de8..6adceaf 100644
--- a/extensions-contrib/cloudfiles-extensions/pom.xml
+++ b/extensions-contrib/cloudfiles-extensions/pom.xml
@@ -29,7 +29,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-contrib/distinctcount/pom.xml b/extensions-contrib/distinctcount/pom.xml
index 92c6c07..fab569d 100644
--- a/extensions-contrib/distinctcount/pom.xml
+++ b/extensions-contrib/distinctcount/pom.xml
@@ -29,7 +29,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-contrib/dropwizard-emitter/pom.xml b/extensions-contrib/dropwizard-emitter/pom.xml
index 04b5a4b..82a5503 100644
--- a/extensions-contrib/dropwizard-emitter/pom.xml
+++ b/extensions-contrib/dropwizard-emitter/pom.xml
@@ -24,7 +24,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-contrib/gce-extensions/pom.xml b/extensions-contrib/gce-extensions/pom.xml
index 11ffeb7..d28d4c0 100644
--- a/extensions-contrib/gce-extensions/pom.xml
+++ b/extensions-contrib/gce-extensions/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
diff --git a/extensions-contrib/graphite-emitter/pom.xml b/extensions-contrib/graphite-emitter/pom.xml
index f641b37..6826eec 100644
--- a/extensions-contrib/graphite-emitter/pom.xml
+++ b/extensions-contrib/graphite-emitter/pom.xml
@@ -24,7 +24,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-contrib/influx-extensions/pom.xml b/extensions-contrib/influx-extensions/pom.xml
index 4842426..5f85fca 100644
--- a/extensions-contrib/influx-extensions/pom.xml
+++ b/extensions-contrib/influx-extensions/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-contrib/influxdb-emitter/pom.xml b/extensions-contrib/influxdb-emitter/pom.xml
index 3d57918..ed11199 100644
--- a/extensions-contrib/influxdb-emitter/pom.xml
+++ b/extensions-contrib/influxdb-emitter/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-contrib/kafka-emitter/pom.xml b/extensions-contrib/kafka-emitter/pom.xml
index 2430739..28e44bf 100644
--- a/extensions-contrib/kafka-emitter/pom.xml
+++ b/extensions-contrib/kafka-emitter/pom.xml
@@ -24,7 +24,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-contrib/materialized-view-maintenance/pom.xml b/extensions-contrib/materialized-view-maintenance/pom.xml
index adaabea..f7de5c7 100644
--- a/extensions-contrib/materialized-view-maintenance/pom.xml
+++ b/extensions-contrib/materialized-view-maintenance/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>druid</artifactId>
         <groupId>org.apache.druid</groupId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/extensions-contrib/materialized-view-selection/pom.xml b/extensions-contrib/materialized-view-selection/pom.xml
index f51fc6b..6b74104 100644
--- a/extensions-contrib/materialized-view-selection/pom.xml
+++ b/extensions-contrib/materialized-view-selection/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>druid</artifactId>
         <groupId>org.apache.druid</groupId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/extensions-contrib/momentsketch/pom.xml b/extensions-contrib/momentsketch/pom.xml
index a32f760..64eb12d 100644
--- a/extensions-contrib/momentsketch/pom.xml
+++ b/extensions-contrib/momentsketch/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>druid</artifactId>
         <groupId>org.apache.druid</groupId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/extensions-contrib/moving-average-query/pom.xml b/extensions-contrib/moving-average-query/pom.xml
index 6036cea..03588c2 100644
--- a/extensions-contrib/moving-average-query/pom.xml
+++ b/extensions-contrib/moving-average-query/pom.xml
@@ -24,7 +24,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-contrib/opentsdb-emitter/pom.xml b/extensions-contrib/opentsdb-emitter/pom.xml
index 74529b0..6cd310d 100644
--- a/extensions-contrib/opentsdb-emitter/pom.xml
+++ b/extensions-contrib/opentsdb-emitter/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-contrib/redis-cache/pom.xml b/extensions-contrib/redis-cache/pom.xml
index 154375e..df1bd66 100644
--- a/extensions-contrib/redis-cache/pom.xml
+++ b/extensions-contrib/redis-cache/pom.xml
@@ -29,7 +29,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-contrib/sqlserver-metadata-storage/pom.xml b/extensions-contrib/sqlserver-metadata-storage/pom.xml
index df4014f..338bf91 100644
--- a/extensions-contrib/sqlserver-metadata-storage/pom.xml
+++ b/extensions-contrib/sqlserver-metadata-storage/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-contrib/statsd-emitter/pom.xml b/extensions-contrib/statsd-emitter/pom.xml
index 7fcab6d..5c4677b 100644
--- a/extensions-contrib/statsd-emitter/pom.xml
+++ b/extensions-contrib/statsd-emitter/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <artifactId>druid</artifactId>
     <groupId>org.apache.druid</groupId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
diff --git a/extensions-contrib/tdigestsketch/pom.xml b/extensions-contrib/tdigestsketch/pom.xml
index cc62400..7d428df 100644
--- a/extensions-contrib/tdigestsketch/pom.xml
+++ b/extensions-contrib/tdigestsketch/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <artifactId>druid</artifactId>
     <groupId>org.apache.druid</groupId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
diff --git a/extensions-contrib/thrift-extensions/pom.xml b/extensions-contrib/thrift-extensions/pom.xml
index 4c0dee3..0ef4f47 100644
--- a/extensions-contrib/thrift-extensions/pom.xml
+++ b/extensions-contrib/thrift-extensions/pom.xml
@@ -28,7 +28,7 @@
   <parent>
     <artifactId>druid</artifactId>
     <groupId>org.apache.druid</groupId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
diff --git a/extensions-contrib/time-min-max/pom.xml b/extensions-contrib/time-min-max/pom.xml
index 1ad59ed..1323f69 100644
--- a/extensions-contrib/time-min-max/pom.xml
+++ b/extensions-contrib/time-min-max/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <artifactId>druid</artifactId>
     <groupId>org.apache.druid</groupId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
diff --git a/extensions-contrib/virtual-columns/pom.xml b/extensions-contrib/virtual-columns/pom.xml
index 2c60315..d05238d 100644
--- a/extensions-contrib/virtual-columns/pom.xml
+++ b/extensions-contrib/virtual-columns/pom.xml
@@ -29,7 +29,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-core/avro-extensions/pom.xml b/extensions-core/avro-extensions/pom.xml
index d97544a..5b70fce 100644
--- a/extensions-core/avro-extensions/pom.xml
+++ b/extensions-core/avro-extensions/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/azure-extensions/pom.xml b/extensions-core/azure-extensions/pom.xml
index aa9b1ca..10bd9e8 100644
--- a/extensions-core/azure-extensions/pom.xml
+++ b/extensions-core/azure-extensions/pom.xml
@@ -29,7 +29,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-core/datasketches/pom.xml b/extensions-core/datasketches/pom.xml
index 45e5bf9..8240aca 100644
--- a/extensions-core/datasketches/pom.xml
+++ b/extensions-core/datasketches/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/druid-aws-rds-extensions/pom.xml b/extensions-core/druid-aws-rds-extensions/pom.xml
index 397039e..0c7ddb8 100644
--- a/extensions-core/druid-aws-rds-extensions/pom.xml
+++ b/extensions-core/druid-aws-rds-extensions/pom.xml
@@ -18,8 +18,7 @@
   ~ under the License.
   -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
   <groupId>org.apache.druid.extensions</groupId>
@@ -30,7 +29,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/druid-basic-security/pom.xml b/extensions-core/druid-basic-security/pom.xml
index 514bc43..aba6b53 100644
--- a/extensions-core/druid-basic-security/pom.xml
+++ b/extensions-core/druid-basic-security/pom.xml
@@ -30,7 +30,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/druid-bloom-filter/pom.xml b/extensions-core/druid-bloom-filter/pom.xml
index f406c95..49895e1 100644
--- a/extensions-core/druid-bloom-filter/pom.xml
+++ b/extensions-core/druid-bloom-filter/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/druid-kerberos/pom.xml b/extensions-core/druid-kerberos/pom.xml
index 083e3db..9f17f70 100644
--- a/extensions-core/druid-kerberos/pom.xml
+++ b/extensions-core/druid-kerberos/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/druid-pac4j/pom.xml b/extensions-core/druid-pac4j/pom.xml
index ab21e43..677dfe4 100644
--- a/extensions-core/druid-pac4j/pom.xml
+++ b/extensions-core/druid-pac4j/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/druid-ranger-security/pom.xml b/extensions-core/druid-ranger-security/pom.xml
index 8e9baf9..a95824b 100644
--- a/extensions-core/druid-ranger-security/pom.xml
+++ b/extensions-core/druid-ranger-security/pom.xml
@@ -30,7 +30,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-core/ec2-extensions/pom.xml b/extensions-core/ec2-extensions/pom.xml
index c47a69d..e762726 100644
--- a/extensions-core/ec2-extensions/pom.xml
+++ b/extensions-core/ec2-extensions/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/google-extensions/pom.xml b/extensions-core/google-extensions/pom.xml
index 9311151..923a9e0 100644
--- a/extensions-core/google-extensions/pom.xml
+++ b/extensions-core/google-extensions/pom.xml
@@ -29,7 +29,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-core/hdfs-storage/pom.xml b/extensions-core/hdfs-storage/pom.xml
index e7fb77e..00ec04f 100644
--- a/extensions-core/hdfs-storage/pom.xml
+++ b/extensions-core/hdfs-storage/pom.xml
@@ -29,7 +29,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-core/histogram/pom.xml b/extensions-core/histogram/pom.xml
index d5d769c..8ebf54b 100644
--- a/extensions-core/histogram/pom.xml
+++ b/extensions-core/histogram/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-core/kafka-extraction-namespace/pom.xml b/extensions-core/kafka-extraction-namespace/pom.xml
index cfcde9a..04de70f 100644
--- a/extensions-core/kafka-extraction-namespace/pom.xml
+++ b/extensions-core/kafka-extraction-namespace/pom.xml
@@ -28,7 +28,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/kafka-indexing-service/pom.xml b/extensions-core/kafka-indexing-service/pom.xml
index d159875..12a01ce 100644
--- a/extensions-core/kafka-indexing-service/pom.xml
+++ b/extensions-core/kafka-indexing-service/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/kinesis-indexing-service/pom.xml b/extensions-core/kinesis-indexing-service/pom.xml
index 0659bed..a50dcde 100644
--- a/extensions-core/kinesis-indexing-service/pom.xml
+++ b/extensions-core/kinesis-indexing-service/pom.xml
@@ -29,7 +29,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-core/kubernetes-extensions/pom.xml b/extensions-core/kubernetes-extensions/pom.xml
index b68e46d..e58b485 100644
--- a/extensions-core/kubernetes-extensions/pom.xml
+++ b/extensions-core/kubernetes-extensions/pom.xml
@@ -18,8 +18,7 @@
   ~ under the License.
   -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
   <groupId>org.apache.druid.extensions</groupId>
@@ -30,7 +29,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/lookups-cached-global/pom.xml b/extensions-core/lookups-cached-global/pom.xml
index 013910fc..1b59be5 100644
--- a/extensions-core/lookups-cached-global/pom.xml
+++ b/extensions-core/lookups-cached-global/pom.xml
@@ -28,7 +28,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/lookups-cached-single/pom.xml b/extensions-core/lookups-cached-single/pom.xml
index 047e85b..084a0be 100644
--- a/extensions-core/lookups-cached-single/pom.xml
+++ b/extensions-core/lookups-cached-single/pom.xml
@@ -28,7 +28,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/mysql-metadata-storage/pom.xml b/extensions-core/mysql-metadata-storage/pom.xml
index 84f59c0..e7f104e 100644
--- a/extensions-core/mysql-metadata-storage/pom.xml
+++ b/extensions-core/mysql-metadata-storage/pom.xml
@@ -30,7 +30,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-core/orc-extensions/pom.xml b/extensions-core/orc-extensions/pom.xml
index 182679d..61a2a52 100644
--- a/extensions-core/orc-extensions/pom.xml
+++ b/extensions-core/orc-extensions/pom.xml
@@ -26,7 +26,7 @@
     <parent>
         <artifactId>druid</artifactId>
         <groupId>org.apache.druid</groupId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/extensions-core/parquet-extensions/pom.xml b/extensions-core/parquet-extensions/pom.xml
index 934602e..705de73 100644
--- a/extensions-core/parquet-extensions/pom.xml
+++ b/extensions-core/parquet-extensions/pom.xml
@@ -27,7 +27,7 @@
   <parent>
     <artifactId>druid</artifactId>
     <groupId>org.apache.druid</groupId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
diff --git a/extensions-core/postgresql-metadata-storage/pom.xml b/extensions-core/postgresql-metadata-storage/pom.xml
index f986159..a0a7baa 100644
--- a/extensions-core/postgresql-metadata-storage/pom.xml
+++ b/extensions-core/postgresql-metadata-storage/pom.xml
@@ -30,7 +30,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/extensions-core/protobuf-extensions/pom.xml b/extensions-core/protobuf-extensions/pom.xml
index 33ce89a..94109f0 100644
--- a/extensions-core/protobuf-extensions/pom.xml
+++ b/extensions-core/protobuf-extensions/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <artifactId>druid</artifactId>
     <groupId>org.apache.druid</groupId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/s3-extensions/pom.xml b/extensions-core/s3-extensions/pom.xml
index 0d9667c..22766f3 100644
--- a/extensions-core/s3-extensions/pom.xml
+++ b/extensions-core/s3-extensions/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extensions-core/simple-client-sslcontext/pom.xml b/extensions-core/simple-client-sslcontext/pom.xml
index 890bb8c..5cd709d 100644
--- a/extensions-core/simple-client-sslcontext/pom.xml
+++ b/extensions-core/simple-client-sslcontext/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <artifactId>druid</artifactId>
     <groupId>org.apache.druid</groupId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
diff --git a/extensions-core/stats/pom.xml b/extensions-core/stats/pom.xml
index ae32725..1b7453a 100644
--- a/extensions-core/stats/pom.xml
+++ b/extensions-core/stats/pom.xml
@@ -29,7 +29,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/hll/pom.xml b/hll/pom.xml
index 9a1bbc3..4fbdbfb 100644
--- a/hll/pom.xml
+++ b/hll/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
     </parent>
 
     <artifactId>druid-hll</artifactId>
diff --git a/indexing-hadoop/pom.xml b/indexing-hadoop/pom.xml
index 5b481c8..4491dc3 100644
--- a/indexing-hadoop/pom.xml
+++ b/indexing-hadoop/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
     </parent>
 
     <dependencies>
diff --git a/indexing-service/pom.xml b/indexing-service/pom.xml
index 33f4df5..bb0cd05 100644
--- a/indexing-service/pom.xml
+++ b/indexing-service/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
     </parent>
 
     <dependencies>
diff --git a/integration-tests/pom.xml b/integration-tests/pom.xml
index a43b3ed..d98a9e3 100644
--- a/integration-tests/pom.xml
+++ b/integration-tests/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
     </parent>
 
     <dependencies>
diff --git a/pom.xml b/pom.xml
index 3fd1d76..7881521 100644
--- a/pom.xml
+++ b/pom.xml
@@ -29,7 +29,7 @@
 
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
     <packaging>pom</packaging>
 
     <name>Druid</name>
@@ -66,7 +66,7 @@
         <connection>scm:git:ssh://git@github.com/apache/druid.git</connection>
         <developerConnection>scm:git:ssh://git@github.com/apache/druid.git</developerConnection>
         <url>https://github.com/apache/druid.git</url>
-        <tag>0.19.0-SNAPSHOT</tag>
+        <tag>druid-0.21.0-rc1</tag>
     </scm>
 
     <properties>
diff --git a/processing/pom.xml b/processing/pom.xml
index e4b737d..e2cfeb0 100644
--- a/processing/pom.xml
+++ b/processing/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
     </parent>
 
     <dependencies>
diff --git a/server/pom.xml b/server/pom.xml
index 414b5f2..0af2ec9 100644
--- a/server/pom.xml
+++ b/server/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
     </parent>
 
     <dependencies>
diff --git a/services/pom.xml b/services/pom.xml
index 49e84e3..fa29e12 100644
--- a/services/pom.xml
+++ b/services/pom.xml
@@ -27,7 +27,7 @@
     <parent>
         <groupId>org.apache.druid</groupId>
         <artifactId>druid</artifactId>
-        <version>0.21.0-SNAPSHOT</version>
+        <version>0.21.0</version>
     </parent>
 
     <dependencies>
diff --git a/sql/pom.xml b/sql/pom.xml
index ae66c14..07b02ba 100644
--- a/sql/pom.xml
+++ b/sql/pom.xml
@@ -28,7 +28,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
   </parent>
 
   <dependencies>
diff --git a/web-console/pom.xml b/web-console/pom.xml
index 7c2d43d..b2e94f4 100644
--- a/web-console/pom.xml
+++ b/web-console/pom.xml
@@ -28,7 +28,7 @@
   <parent>
     <groupId>org.apache.druid</groupId>
     <artifactId>druid</artifactId>
-    <version>0.21.0-SNAPSHOT</version>
+    <version>0.21.0</version>
   </parent>
 
   <properties>