[improve][broker] Fix ServiceUnitStateCompactionStrategy to cover fas…

…t-forward cursor behavior after compaction (#20110)

Master Issue: #16691

### Motivation

Raising a PR to implement: #16691

After the compaction, the cursor can fast-forward to the compacted horizon when a large number of messages are compacted before the next read. Hence, ServiceUnitStateCompactionStrategy also needs to cover this case. Currently, the existing and slow(their states are far behind) tableviews with ServiceUnitStateCompactionStrategy could not accept those compacted messages. In the load balance extension context, this means the ownership data could be inconsistent among brokers.

### Modifications
This PR
  - fixes ServiceUnitStateCompactionStrategy to accept the state data if its version is bigger than the current version +1.
  - (minor fix) does not repeatedly update the replication_clusters in the policies when creating the system namespace. This update redundantly triggers ZK watchers when restarting brokers.
  -  sets closeWithoutWaitingClientDisconnect=true, upon unload(following the same setting as the modular LM's)

(cherry picked from commit 6cfa468)

pulsar-broker/src/main/java/org/apache/pulsar/PulsarClusterMetadataSetup.java

@@ -385,10 +385,19 @@ static void createNamespaceIfAbsent(PulsarResources resources, NamespaceName nam
             namespaceResources.createPolicies(namespaceName, policies);
         } else {
             log.info("Namespace {} already exists.", namespaceName);
-            namespaceResources.setPolicies(namespaceName, policies -> {
-                policies.replication_clusters.add(cluster);
-                return policies;
-            });
+            var replicaClusterFound = false;
+            var policiesOptional = namespaceResources.getPolicies(namespaceName);
+            if (policiesOptional.isPresent() && policiesOptional.get().replication_clusters.contains(cluster)) {
+                replicaClusterFound = true;
+            }
+            if (!replicaClusterFound) {
+                namespaceResources.setPolicies(namespaceName, policies -> {
+                    policies.replication_clusters.add(cluster);
+                    return policies;
+                });
+                log.info("Updated namespace:{} policies. Added the replication cluster:{}",
+                        namespaceName, cluster);
+            }
         }
     }
 

pulsar-broker/src/main/java/org/apache/pulsar/broker/loadbalance/extensions/channel/ServiceUnitStateChannelImpl.java

@@ -819,7 +819,7 @@ private CompletableFuture<Integer> closeServiceUnit(String serviceUnit) {
         NamespaceBundle bundle = getNamespaceBundle(serviceUnit);
         return pulsar.getBrokerService().unloadServiceUnit(
                         bundle,
-                        false,
+                        true,
                         pulsar.getConfig().getNamespaceBundleUnloadingTimeoutMs(),
                         TimeUnit.MILLISECONDS)
                 .thenApply(numUnloadedTopics -> {

pulsar-broker/src/main/java/org/apache/pulsar/broker/loadbalance/extensions/channel/ServiceUnitStateCompactionStrategy.java

@@ -52,9 +52,13 @@ public boolean shouldKeepLeft(ServiceUnitStateData from, ServiceUnitStateData to
             return false;
         }
 
-        // Skip the compaction case where from = null and to.versionId > 1
-        if (from != null && from.versionId() + 1 != to.versionId()) {
-            return true;
+        if (from != null) {
+            if (from.versionId() == Long.MAX_VALUE && to.versionId() == Long.MIN_VALUE) { // overflow
+            } else if (from.versionId() >= to.versionId()) {
+                return true;
+            } else if (from.versionId() < to.versionId() - 1) { // Compacted
+                return false;
+            } // else from.versionId() == to.versionId() - 1 // continue to check further
         }
 
         if (to.force()) {

pulsar-broker/src/main/java/org/apache/pulsar/compaction/StrategicTwoPhaseCompactor.java

@@ -379,7 +379,7 @@ private <T> CompletableFuture<Long> runPhaseTwo(
                             });
                 })
                 .thenCompose(v -> {
-                    log.info("Acking ledger id {}", phaseOneResult.firstId);
+                    log.info("Acking ledger id {}", phaseOneResult.lastId);
                     return ((CompactionReaderImpl<T>) reader)
                             .acknowledgeCumulativeAsync(
                                     phaseOneResult.lastId, Map.of(COMPACTED_TOPIC_LEDGER_PROPERTY,

pulsar-broker/src/test/java/org/apache/pulsar/broker/loadbalance/extensions/ExtensibleLoadManagerImplTest.java

@@ -592,6 +592,8 @@ public void testTopBundlesLoadDataStoreTableViewFromChannelOwner() throws Except
         restartBroker();
         pulsar1 = pulsar;
         setPrimaryLoadManager();
+        admin.namespaces().setNamespaceReplicationClusters("public/default",
+                Sets.newHashSet(this.conf.getClusterName()));
 
         var serviceUnitStateChannelPrimaryNew =
                 (ServiceUnitStateChannelImpl) FieldUtils.readDeclaredField(primaryLoadManager,

pulsar-broker/src/test/java/org/apache/pulsar/broker/loadbalance/extensions/channel/ServiceUnitStateCompactionStrategyTest.java

@@ -85,6 +85,10 @@ public void testVersionId(){
                 new ServiceUnitStateData(Owned, dst, src, 10),
                 new ServiceUnitStateData(Releasing, "broker2", dst, 5)));
 
+        assertFalse(strategy.shouldKeepLeft(
+                new ServiceUnitStateData(Owned, dst, src, 10),
+                new ServiceUnitStateData(Owned, "broker2", dst, 12)));
+
     }
 
     @Test

pulsar-broker/src/test/java/org/apache/pulsar/compaction/ServiceUnitStateCompactionTest.java

@@ -27,6 +27,9 @@
 import static org.apache.pulsar.broker.loadbalance.extensions.channel.ServiceUnitState.isValidTransition;
 import static org.apache.pulsar.broker.loadbalance.extensions.channel.ServiceUnitStateChannelImpl.MSG_COMPRESSION_TYPE;
 import static org.apache.pulsar.broker.loadbalance.extensions.channel.ServiceUnitStateData.state;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.reset;
+import static org.mockito.Mockito.spy;
 import static org.testng.Assert.assertEquals;
 import static org.testng.Assert.assertNotNull;
 import static org.testng.Assert.assertNull;
@@ -49,6 +52,7 @@
 import java.util.concurrent.Semaphore;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
 import java.util.stream.Collectors;
 import org.apache.bookkeeper.client.BookKeeper;
 import org.apache.commons.lang.reflect.FieldUtils;
@@ -69,6 +73,7 @@
 import org.apache.pulsar.client.api.Reader;
 import org.apache.pulsar.client.api.Schema;
 import org.apache.pulsar.client.api.SubscriptionInitialPosition;
+import org.apache.pulsar.client.impl.ReaderImpl;
 import org.apache.pulsar.common.policies.data.ClusterData;
 import org.apache.pulsar.common.policies.data.PersistentTopicInternalStats;
 import org.apache.pulsar.common.policies.data.RetentionPolicies;
@@ -628,6 +633,80 @@ public void testSlowTableviewAfterCompaction() throws Exception {
 
     }
 
+    @Test
+    public void testSlowReceiveTableviewAfterCompaction() throws Exception {
+        String topic = "persistent://my-property/use/my-ns/my-topic1";
+        String strategyClassName = "topicCompactionStrategyClassName";
+
+        pulsarClient.newConsumer(schema)
+                .topic(topic)
+                .subscriptionName("sub1")
+                .readCompacted(true)
+                .subscribe().close();
+
+        var tv = pulsar.getClient().newTableViewBuilder(schema)
+                .topic(topic)
+                .subscriptionName("slowTV")
+                .loadConf(Map.of(
+                        strategyClassName,
+                        ServiceUnitStateCompactionStrategy.class.getName()))
+                .create();
+
+        // Configure retention to ensue data is retained for reader
+        admin.namespaces().setRetention("my-property/use/my-ns",
+                new RetentionPolicies(-1, -1));
+
+        Producer<ServiceUnitStateData> producer = pulsarClient.newProducer(schema)
+                .topic(topic)
+                .compressionType(MSG_COMPRESSION_TYPE)
+                .enableBatching(true)
+                .messageRoutingMode(MessageRoutingMode.SinglePartition)
+                .create();
+
+        StrategicTwoPhaseCompactor compactor
+                = new StrategicTwoPhaseCompactor(conf, pulsarClient, bk, compactionScheduler);
+
+        var reader = ((CompletableFuture<ReaderImpl<ServiceUnitStateData>>) FieldUtils
+                .readDeclaredField(tv, "reader", true)).get();
+        var consumer = spy(reader.getConsumer());
+        FieldUtils.writeDeclaredField(reader, "consumer", consumer, true);
+        String bundle = "bundle1";
+        final AtomicInteger versionId = new AtomicInteger(0);
+        final AtomicInteger cnt = new AtomicInteger(1);
+        int msgAddCount = 1000; // has to be big enough to cover compacted cursor fast-forward.
+        doAnswer(invocationOnMock -> {
+            if (cnt.decrementAndGet() == 0) {
+                var msg = consumer.receiveAsync();
+                for (int i = 0; i < msgAddCount; i++) {
+                    producer.newMessage().key(bundle).value(
+                            new ServiceUnitStateData(Owned, "broker" + versionId.incrementAndGet(), true,
+                                    versionId.get())).send();
+                }
+                compactor.compact(topic, strategy).join();
+                return msg;
+            }
+            // Call the real method
+            reset(consumer);
+            return consumer.receiveAsync();
+        }).when(consumer).receiveAsync();
+        producer.newMessage().key(bundle).value(
+                new ServiceUnitStateData(Owned, "broker", true,
+                        versionId.incrementAndGet())).send();
+        producer.newMessage().key(bundle).value(
+                new ServiceUnitStateData(Owned, "broker" + versionId.incrementAndGet(), true,
+                        versionId.get())).send();
+        Awaitility.await().atMost(10, TimeUnit.SECONDS).untilAsserted(
+                () -> {
+                    var val = tv.get(bundle);
+                    assertNotNull(val);
+                    assertEquals(val.dstBroker(), "broker" + versionId.get());
+                }
+        );
+
+        producer.close();
+        tv.close();
+    }
+
     @Test
     public void testBrokerRestartAfterCompaction() throws Exception {
         String topic = "persistent://my-property/use/my-ns/my-topic1";

pulsar-client/src/main/java/org/apache/pulsar/client/impl/TableViewImpl.java

@@ -192,6 +192,13 @@ private void handleMessage(Message<T> msg) {
                 if (compactionStrategy != null) {
                     T prev = data.get(key);
                     update = !compactionStrategy.shouldKeepLeft(prev, cur);
+                    if (!update) {
+                        log.info("Skipped the message from topic {}. key={} value={} prev={}",
+                                conf.getTopicName(),
+                                key,
+                                cur,
+                                prev);
+                    }
                 }
 
                 if (update) {