Collapse retention lease integration tests (#38483)

This commit collapses the retention lease integration tests into a
single suite.

server/src/test/java/org/elasticsearch/index/seqno/RetentionLeaseSyncIT.java → server/src/test/java/org/elasticsearch/index/seqno/RetentionLeaseIT.java

@@ -37,6 +37,7 @@
 import org.elasticsearch.threadpool.ThreadPool;
 
 import java.io.Closeable;
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
@@ -47,13 +48,14 @@
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
+import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertAcked;
 import static org.hamcrest.Matchers.anyOf;
 import static org.hamcrest.Matchers.contains;
 import static org.hamcrest.Matchers.empty;
 import static org.hamcrest.Matchers.equalTo;
 
 @ESIntegTestCase.ClusterScope(scope = ESIntegTestCase.Scope.TEST)
-public class RetentionLeaseSyncIT extends ESIntegTestCase  {
+public class RetentionLeaseIT extends ESIntegTestCase  {
 
     public static final class RetentionLeaseSyncIntervalSettingPlugin extends Plugin {
 
@@ -68,7 +70,7 @@ public List<Setting<?>> getSettings() {
     protected Collection<Class<? extends Plugin>> nodePlugins() {
         return Stream.concat(
                 super.nodePlugins().stream(),
-                Stream.of(RetentionLeaseBackgroundSyncIT.RetentionLeaseSyncIntervalSettingPlugin.class))
+                Stream.of(RetentionLeaseSyncIntervalSettingPlugin.class))
                 .collect(Collectors.toList());
     }
 
@@ -205,9 +207,62 @@ public void testRetentionLeasesSyncOnExpiration() throws Exception {
         }
     }
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/38487")
+    public void testBackgroundRetentionLeaseSync() throws Exception {
+        final int numberOfReplicas = 2 - scaledRandomIntBetween(0, 2);
+        internalCluster().ensureAtLeastNumDataNodes(1 + numberOfReplicas);
+        final Settings settings = Settings.builder()
+                .put("index.number_of_shards", 1)
+                .put("index.number_of_replicas", numberOfReplicas)
+                .put(IndexService.RETENTION_LEASE_SYNC_INTERVAL_SETTING.getKey(), "1s")
+                .build();
+        createIndex("index", settings);
+        ensureGreen("index");
+        final String primaryShardNodeId = clusterService().state().routingTable().index("index").shard(0).primaryShard().currentNodeId();
+        final String primaryShardNodeName = clusterService().state().nodes().get(primaryShardNodeId).getName();
+        final IndexShard primary = internalCluster()
+                .getInstance(IndicesService.class, primaryShardNodeName)
+                .getShardOrNull(new ShardId(resolveIndex("index"), 0));
+        // we will add multiple retention leases and expect to see them synced to all replicas
+        final int length = randomIntBetween(1, 8);
+        final Map<String, RetentionLease> currentRetentionLeases = new HashMap<>(length);
+        final List<String> ids = new ArrayList<>(length);
+        for (int i = 0; i < length; i++) {
+            final String id = randomValueOtherThanMany(currentRetentionLeases.keySet()::contains, () -> randomAlphaOfLength(8));
+            ids.add(id);
+            final long retainingSequenceNumber = randomLongBetween(0, Long.MAX_VALUE);
+            final String source = randomAlphaOfLength(8);
+            final CountDownLatch latch = new CountDownLatch(1);
+            // put a new lease
+            currentRetentionLeases.put(
+                    id,
+                    primary.addRetentionLease(id, retainingSequenceNumber, source, ActionListener.wrap(latch::countDown)));
+            latch.await();
+            // now renew all existing leases; we expect to see these synced to the replicas
+            for (int j = 0; j <= i; j++) {
+                currentRetentionLeases.put(
+                        ids.get(j),
+                        primary.renewRetentionLease(
+                                ids.get(j),
+                                randomLongBetween(currentRetentionLeases.get(ids.get(j)).retainingSequenceNumber(), Long.MAX_VALUE),
+                                source));
+            }
+            assertBusy(() -> {
+                // check all retention leases have been synced to all replicas
+                for (final ShardRouting replicaShard : clusterService().state().routingTable().index("index").shard(0).replicaShards()) {
+                    final String replicaShardNodeId = replicaShard.currentNodeId();
+                    final String replicaShardNodeName = clusterService().state().nodes().get(replicaShardNodeId).getName();
+                    final IndexShard replica = internalCluster()
+                            .getInstance(IndicesService.class, replicaShardNodeName)
+                            .getShardOrNull(new ShardId(resolveIndex("index"), 0));
+                    assertThat(replica.getRetentionLeases(), equalTo(primary.getRetentionLeases()));
+                }
+            });
+        }
+    }
+
     public void testRetentionLeasesSyncOnRecovery() throws Exception {
-        final int numberOfReplicas = 1;
+        final int numberOfReplicas = 2 - scaledRandomIntBetween(0, 2);
+        internalCluster().ensureAtLeastNumDataNodes(1 + numberOfReplicas);
         /*
          * We effectively disable the background sync to ensure that the retention leases are not synced in the background so that the only
          * source of retention leases on the replicas would be from the commit point and recovery.
@@ -217,10 +272,9 @@ public void testRetentionLeasesSyncOnRecovery() throws Exception {
                 .put("index.number_of_replicas", 0)
                 .put(IndexService.RETENTION_LEASE_SYNC_INTERVAL_SETTING.getKey(), TimeValue.timeValueHours(24))
                 .build();
-        createIndex("index", settings);
+        // when we increase the number of replicas below we want to exclude the replicas from being allocated so that they do not recover
+        assertAcked(prepareCreate("index", 1).setSettings(settings));
         ensureYellow("index");
-        // exclude the replicas from being allocated
-        allowNodes("index", 1);
         final AcknowledgedResponse response = client().admin()
                 .indices()
                 .prepareUpdateSettings("index").setSettings(Settings.builder().put("index.number_of_replicas", numberOfReplicas).build())
@@ -261,11 +315,6 @@ public void testRetentionLeasesSyncOnRecovery() throws Exception {
                     .getShardOrNull(new ShardId(resolveIndex("index"), 0));
             final Map<String, RetentionLease> retentionLeasesOnReplica = RetentionLeases.toMap(replica.getRetentionLeases());
             assertThat(retentionLeasesOnReplica, equalTo(currentRetentionLeases));
-
-            // check retention leases have been committed on the replica
-            final RetentionLeases replicaCommittedRetentionLeases = RetentionLeases.decodeRetentionLeases(
-                    replica.acquireLastIndexCommit(false).getIndexCommit().getUserData().get(Engine.RETENTION_LEASES));
-            assertThat(currentRetentionLeases, equalTo(RetentionLeases.toMap(replicaCommittedRetentionLeases)));
         }
     }