KAFKA-6535: Set default retention ms for Streams repartition topics to Long.MAX_VALUE (#4730)

Implements KIP-284

Reviewers: Matthias J. Sax <matthias@confluent.io>, Bill Bejeck <bill@confluent.io>, Guozhang Wang <guozhang@confluent.io>

docs/streams/upgrade-guide.html

@@ -100,6 +100,7 @@
     </ul>
 
     <!-- TODO: verify release verion and update `id` and `href` attributes (also at other places that link to this headline) -->
+    
     <h3><a id="streams_api_changes_120" href="#streams_api_changes_120">Streams API changes in 1.2.0</a></h3>
     <p>
         We have removed the <code>skippedDueToDeserializationError-rate</code> and <code>skippedDueToDeserializationError-total</code> metrics.
@@ -156,7 +157,10 @@
       The new class <code>To</code> allows you to send records to all or specific downstream processors by name and to set the timestamp for the output record.
       Forwarding based on child index is not supported in the new API any longer.
     </p>
-
+    <p>
+        <a href="https://cwiki.apache.org/confluence/x/DVyHB">KIP-284</a> changed the retention time for repartition topics by setting its default value to <code>Long.MAX_VALUE</code>.
+        Instead of relying on data retention Kafka Streams uses the new purge data API to delete consumed data from those topics and to keep used storage small now.
+    </p>
     <p>
       Kafka Streams DSL for Scala is a new Kafka Streams client library available for developers authoring Kafka Streams applications in Scala.  It wraps core Kafka Streams DSL types to make it easier to call when
       interoperating with Scala code.  For example, it includes higher order functions as parameters for transformations avoiding the need anonymous classes in Java 7 or experimental SAM type conversions in Scala 2.11, automatic conversion between Java and Scala collection types, a way

docs/upgrade.html

@@ -75,6 +75,7 @@
         updated to aggregate across different versions.
     </li>
     <li> New Kafka Streams configuration parameter <code>upgrade.from</code> added that allows rolling bounce upgrade from older version. </li>
+    <li><a href="https://cwiki.apache.org/confluence/x/DVyHB">KIP-284</a> changed the retention time for repartition topics by setting its default value to <code>Long.MAX_VALUE</code>.</li>
 </ul>
 
 <h5><a id="upgrade_120_new_protocols" href="#upgrade_120_new_protocols">New Protocol Versions</a></h5>
@@ -87,7 +88,6 @@
     <li> See <a href="/{{version}}/documentation/streams/upgrade-guide#streams_api_changes_120">Streams API changes in 1.2.0</a> for more details. </li>
 </ul>
 
-
 <h4><a id="upgrade_1_1_0" href="#upgrade_1_1_0">Upgrading from 0.8.x, 0.9.x, 0.10.0.x, 0.10.1.x, 0.10.2.x, 0.11.0.x or 1.0.x to 1.1.x</a></h4>
 <p>Kafka 1.1.0 introduces wire protocol changes. By following the recommended rolling upgrade plan below,
     you guarantee no downtime during the upgrade. However, please review the <a href="#upgrade_110_notable">notable changes in 1.1.0</a> before upgrading.
@@ -132,6 +132,7 @@
         Hot-swaping the jar-file only might not work.</li>
 </ol>
 
+
 <!-- TODO add if 1.1.1 gets release
 <h5><a id="upgrade_111_notable" href="#upgrade_111_notable">Notable changes in 1.1.1</a></h5>
 <ul>

streams/src/main/java/org/apache/kafka/streams/processor/internals/RepartitionTopicConfig.java

@@ -36,6 +36,7 @@ public class RepartitionTopicConfig extends InternalTopicConfig {
         tempTopicDefaultOverrides.put(TopicConfig.SEGMENT_INDEX_BYTES_CONFIG, "52428800");               // 50 MB
         tempTopicDefaultOverrides.put(TopicConfig.SEGMENT_BYTES_CONFIG, "52428800");                     // 50 MB
         tempTopicDefaultOverrides.put(TopicConfig.SEGMENT_MS_CONFIG, "600000");                          // 10 min
+        tempTopicDefaultOverrides.put(TopicConfig.RETENTION_MS_CONFIG, String.valueOf(Long.MAX_VALUE));  // Infinity
         REPARTITION_TOPIC_DEFAULT_OVERRIDES = Collections.unmodifiableMap(tempTopicDefaultOverrides);
     }
 

streams/src/test/java/org/apache/kafka/streams/integration/InternalTopicIntegrationTest.java

@@ -164,7 +164,7 @@ public class InternalTopicIntegrationTest {
 
         final Properties repartitionProps = getTopicProperties(appID + "-Counts-repartition");
         assertEquals(LogConfig.Delete(), repartitionProps.getProperty(LogConfig.CleanupPolicyProp()));
-        assertEquals(4, repartitionProps.size());
+        assertEquals(5, repartitionProps.size());
     }
 
     @Test
@@ -213,6 +213,6 @@ public class InternalTopicIntegrationTest {
 
         final Properties repartitionProps = getTopicProperties(appID + "-CountWindows-repartition");
         assertEquals(LogConfig.Delete(), repartitionProps.getProperty(LogConfig.CleanupPolicyProp()));
-        assertEquals(4, repartitionProps.size());
+        assertEquals(5, repartitionProps.size());
     }
 }

streams/src/test/java/org/apache/kafka/streams/processor/TopologyBuilderTest.java

@@ -588,7 +588,8 @@ public class TopologyBuilderTest {
         final TopicsInfo topicsInfo = builder.topicGroups().values().iterator().next();
         final InternalTopicConfig topicConfig = topicsInfo.repartitionSourceTopics.get("appId-foo");
         final Map<String, String> properties = topicConfig.getProperties(Collections.<String, String>emptyMap(), 10000);
-        assertEquals(4, properties.size());
+        assertEquals(5, properties.size());
+        assertEquals(String.valueOf(Long.MAX_VALUE), properties.get(TopicConfig.RETENTION_MS_CONFIG));
         assertEquals("appId-foo", topicConfig.name());
     }
 

streams/src/test/java/org/apache/kafka/streams/processor/internals/InternalTopicConfigTest.java

@@ -57,4 +57,12 @@ public class InternalTopicConfigTest {
         assertEquals("1000", properties.get("retention.ms"));
         assertEquals("10000", properties.get("retention.bytes"));
     }
+
+    @Test
+    public void shouldUseSuppliedConfigsForRepartitionConfig() {
+        final Map<String, String> configs = new HashMap<>();
+        configs.put("retention.ms", "1000");
+        final RepartitionTopicConfig topicConfig = new RepartitionTopicConfig("name", configs);
+        assertEquals("1000", topicConfig.getProperties(Collections.<String, String>emptyMap(), 0).get(TopicConfig.RETENTION_MS_CONFIG));
+    }
 }

streams/src/test/java/org/apache/kafka/streams/processor/internals/InternalTopologyBuilderTest.java

@@ -554,7 +554,8 @@ public class InternalTopologyBuilderTest {
         final InternalTopologyBuilder.TopicsInfo topicsInfo = builder.topicGroups().values().iterator().next();
         final InternalTopicConfig topicConfig = topicsInfo.repartitionSourceTopics.get("appId-foo");
         final Map<String, String> properties = topicConfig.getProperties(Collections.<String, String>emptyMap(), 10000);
-        assertEquals(4, properties.size());
+        assertEquals(5, properties.size());
+        assertEquals(String.valueOf(Long.MAX_VALUE), properties.get(TopicConfig.RETENTION_MS_CONFIG));
         assertEquals(TopicConfig.CLEANUP_POLICY_DELETE, properties.get(TopicConfig.CLEANUP_POLICY_CONFIG));
         assertEquals("appId-foo", topicConfig.name());
         assertTrue(topicConfig instanceof RepartitionTopicConfig);