Fix Eclipse compilation error
[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / test / java / org / opendaylight / controller / cluster / datastore / DistributedDataStoreRemotingIntegrationTest.java
index 8637a5f17d4a1e2f6cd0e805d3bde082bc5f3248..a298508cc9fff0e40ca6def256fab38babb12ba7 100644 (file)
@@ -8,14 +8,19 @@
 package org.opendaylight.controller.cluster.datastore;
 
 import static org.awaitility.Awaitility.await;
+import static org.hamcrest.CoreMatchers.instanceOf;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.equalTo;
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertThrows;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
+import static org.junit.Assume.assumeTrue;
 import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.timeout;
 import static org.mockito.Mockito.verify;
 
@@ -32,8 +37,6 @@ import akka.testkit.javadsl.TestKit;
 import com.google.common.base.Stopwatch;
 import com.google.common.base.Throwables;
 import com.google.common.collect.ImmutableMap;
-import com.google.common.collect.Range;
-import com.google.common.primitives.UnsignedLong;
 import com.google.common.util.concurrent.ListenableFuture;
 import com.google.common.util.concurrent.MoreExecutors;
 import com.google.common.util.concurrent.Uninterruptibles;
@@ -41,28 +44,22 @@ import com.typesafe.config.ConfigFactory;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
-import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Optional;
-import java.util.Set;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicLong;
-import java.util.function.Supplier;
 import org.junit.After;
-import org.junit.Assume;
 import org.junit.Before;
-import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
 import org.junit.runners.Parameterized.Parameter;
 import org.junit.runners.Parameterized.Parameters;
-import org.mockito.Mockito;
 import org.mockito.stubbing.Answer;
 import org.opendaylight.controller.cluster.access.client.RequestTimeoutException;
 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
@@ -82,10 +79,11 @@ import org.opendaylight.controller.cluster.datastore.messages.ReadyLocalTransact
 import org.opendaylight.controller.cluster.datastore.messages.ReadyTransactionReply;
 import org.opendaylight.controller.cluster.datastore.modification.MergeModification;
 import org.opendaylight.controller.cluster.datastore.modification.WriteModification;
-import org.opendaylight.controller.cluster.datastore.persisted.FrontendHistoryMetadata;
+import org.opendaylight.controller.cluster.datastore.persisted.FrontendClientMetadata;
 import org.opendaylight.controller.cluster.datastore.persisted.FrontendShardDataTreeSnapshotMetadata;
 import org.opendaylight.controller.cluster.datastore.persisted.MetadataShardDataTreeSnapshot;
 import org.opendaylight.controller.cluster.datastore.persisted.ShardSnapshotState;
+import org.opendaylight.controller.cluster.datastore.utils.UnsignedLongBitmap;
 import org.opendaylight.controller.cluster.raft.base.messages.TimeoutNow;
 import org.opendaylight.controller.cluster.raft.client.messages.GetOnDemandRaftState;
 import org.opendaylight.controller.cluster.raft.client.messages.OnDemandRaftState;
@@ -102,6 +100,7 @@ import org.opendaylight.controller.md.cluster.datastore.model.PeopleModel;
 import org.opendaylight.controller.md.cluster.datastore.model.SchemaContextHelper;
 import org.opendaylight.controller.md.cluster.datastore.model.TestModel;
 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
+import org.opendaylight.mdsal.common.api.TransactionCommitFailedException;
 import org.opendaylight.mdsal.dom.api.DOMDataTreeWriteTransaction;
 import org.opendaylight.mdsal.dom.api.DOMTransactionChain;
 import org.opendaylight.mdsal.dom.api.DOMTransactionChainListener;
@@ -115,16 +114,17 @@ import org.opendaylight.yangtools.yang.common.Uint64;
 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
-import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.SystemMapNode;
+import org.opendaylight.yangtools.yang.data.api.schema.builder.CollectionNodeBuilder;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeConfiguration;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
-import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.CollectionNodeBuilder;
 import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableContainerNodeBuilder;
 import org.opendaylight.yangtools.yang.data.impl.schema.tree.InMemoryDataTreeFactory;
 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import scala.collection.Set;
 import scala.concurrent.Await;
 import scala.concurrent.Future;
 import scala.concurrent.duration.FiniteDuration;
@@ -204,9 +204,9 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
             leaderDistributedDataStore.close();
         }
 
-        TestKit.shutdownActorSystem(leaderSystem);
-        TestKit.shutdownActorSystem(followerSystem);
-        TestKit.shutdownActorSystem(follower2System);
+        TestKit.shutdownActorSystem(leaderSystem, true);
+        TestKit.shutdownActorSystem(followerSystem, true);
+        TestKit.shutdownActorSystem(follower2System,true);
 
         InMemoryJournal.clear();
         InMemorySnapshotStore.clear();
@@ -227,7 +227,8 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
     }
 
     private void initDatastores(final String type, final String moduleShardsConfig, final String[] shards,
-            DatastoreContext.Builder leaderBuilder, DatastoreContext.Builder followerBuilder) throws Exception {
+            final DatastoreContext.Builder leaderBuilder, final DatastoreContext.Builder followerBuilder)
+                    throws Exception {
         leaderTestKit = new IntegrationTestKit(leaderSystem, leaderBuilder, commitTimeout);
 
         leaderDistributedDataStore = leaderTestKit.setupAbstractDataStore(
@@ -245,12 +246,12 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
 
     private static void verifyCars(final DOMStoreReadTransaction readTx, final MapEntryNode... entries)
             throws Exception {
-        final Optional<NormalizedNode<?, ?>> optional = readTx.read(CarsModel.CAR_LIST_PATH).get(5, TimeUnit.SECONDS);
+        final Optional<NormalizedNode> optional = readTx.read(CarsModel.CAR_LIST_PATH).get(5, TimeUnit.SECONDS);
         assertTrue("isPresent", optional.isPresent());
 
-        final CollectionNodeBuilder<MapEntryNode, MapNode> listBuilder = ImmutableNodes.mapNodeBuilder(
+        final CollectionNodeBuilder<MapEntryNode, SystemMapNode> listBuilder = ImmutableNodes.mapNodeBuilder(
                 CarsModel.CAR_QNAME);
-        for (final NormalizedNode<?, ?> entry: entries) {
+        for (final NormalizedNode entry: entries) {
             listBuilder.withChild((MapEntryNode) entry);
         }
 
@@ -258,16 +259,13 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
     }
 
     private static void verifyNode(final DOMStoreReadTransaction readTx, final YangInstanceIdentifier path,
-            final NormalizedNode<?, ?> expNode) throws Exception {
-        final Optional<NormalizedNode<?, ?>> optional = readTx.read(path).get(5, TimeUnit.SECONDS);
-        assertTrue("isPresent", optional.isPresent());
-        assertEquals("Data node", expNode, optional.get());
+            final NormalizedNode expNode) throws Exception {
+        assertEquals(Optional.of(expNode), readTx.read(path).get(5, TimeUnit.SECONDS));
     }
 
     private static void verifyExists(final DOMStoreReadTransaction readTx, final YangInstanceIdentifier path)
             throws Exception {
-        final Boolean exists = readTx.exists(path).get(5, TimeUnit.SECONDS);
-        assertEquals("exists", Boolean.TRUE, exists);
+        assertEquals("exists", Boolean.TRUE, readTx.exists(path).get(5, TimeUnit.SECONDS));
     }
 
     @Test
@@ -358,8 +356,7 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
 
     @Test
     public void testSingleTransactionsWritesInQuickSuccession() throws Exception {
-        final String testName = "testWriteTransactionWithSingleShard";
-        initDatastoresWithCars(testName);
+        initDatastoresWithCars("testSingleTransactionsWritesInQuickSuccession");
 
         final DOMStoreTransactionChain txChain = followerDistributedDataStore.createTransactionChain();
 
@@ -371,58 +368,64 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         int numCars = 5;
         for (int i = 0; i < numCars; i++) {
             writeTx = txChain.newWriteOnlyTransaction();
-            writeTx.write(CarsModel.newCarPath("car" + i),
-                    CarsModel.newCarEntry("car" + i, Uint64.valueOf(20000)));
-
+            writeTx.write(CarsModel.newCarPath("car" + i), CarsModel.newCarEntry("car" + i, Uint64.valueOf(20000)));
             followerTestKit.doCommit(writeTx.ready());
 
-            DOMStoreReadTransaction domStoreReadTransaction = txChain.newReadOnlyTransaction();
-            domStoreReadTransaction.read(CarsModel.BASE_PATH).get();
-
-            domStoreReadTransaction.close();
+            try (var tx = txChain.newReadOnlyTransaction()) {
+                tx.read(CarsModel.BASE_PATH).get();
+            }
         }
 
         // wait to let the shard catch up with purged
         await("Range set leak test").atMost(5, TimeUnit.SECONDS)
                 .pollInterval(500, TimeUnit.MILLISECONDS)
                 .untilAsserted(() -> {
-                    Optional<ActorRef> localShard =
-                            leaderDistributedDataStore.getActorUtils().findLocalShard("cars");
-                    FrontendShardDataTreeSnapshotMetadata frontendMetadata =
-                            (FrontendShardDataTreeSnapshotMetadata) leaderDistributedDataStore.getActorUtils()
-                                    .executeOperation(localShard.get(), new RequestFrontendMetadata());
+                    final var localShard = leaderDistributedDataStore.getActorUtils().findLocalShard("cars")
+                        .orElseThrow();
+                    final var frontendMetadata =
+                        (FrontendShardDataTreeSnapshotMetadata) leaderDistributedDataStore.getActorUtils()
+                            .executeOperation(localShard, new RequestFrontendMetadata());
 
+                    final var clientMeta = frontendMetadata.getClients().get(0);
                     if (leaderDistributedDataStore.getActorUtils().getDatastoreContext().isUseTellBasedProtocol()) {
-                        Iterator<FrontendHistoryMetadata> iterator =
-                                frontendMetadata.getClients().get(0).getCurrentHistories().iterator();
-                        FrontendHistoryMetadata metadata = iterator.next();
-                        while (iterator.hasNext() && metadata.getHistoryId() != 1) {
-                            metadata = iterator.next();
-                        }
-
-                        assertEquals(0, metadata.getClosedTransactions().size());
-                        assertEquals(Range.closedOpen(UnsignedLong.valueOf(0), UnsignedLong.valueOf(11)),
-                                metadata.getPurgedTransactions().asRanges().iterator().next());
+                        assertTellClientMetadata(clientMeta, numCars * 2);
                     } else {
-                        // ask based should track no metadata
-                        assertTrue(frontendMetadata.getClients().get(0).getCurrentHistories().isEmpty());
+                        assertAskClientMetadata(clientMeta);
                     }
                 });
 
-        final Optional<NormalizedNode<?, ?>> optional = txChain.newReadOnlyTransaction()
-                .read(CarsModel.CAR_LIST_PATH).get(5, TimeUnit.SECONDS);
-        assertTrue("isPresent", optional.isPresent());
-        assertEquals("# cars", numCars, ((Collection<?>) optional.get().getValue()).size());
+        try (var tx = txChain.newReadOnlyTransaction()) {
+            final var body = tx.read(CarsModel.CAR_LIST_PATH).get(5, TimeUnit.SECONDS).orElseThrow().body();
+            assertThat(body, instanceOf(Collection.class));
+            assertEquals(numCars, ((Collection<?>) body).size());
+        }
+    }
+
+    private void assertAskClientMetadata(final FrontendClientMetadata clientMeta) {
+        // ask based should track no metadata
+        assertEquals(List.of(), clientMeta.getCurrentHistories());
+    }
+
+    private void assertTellClientMetadata(final FrontendClientMetadata clientMeta, final long lastPurged) {
+        final var iterator = clientMeta.getCurrentHistories().iterator();
+        var metadata = iterator.next();
+        while (iterator.hasNext() && metadata.getHistoryId() != 1) {
+            metadata = iterator.next();
+        }
+
+        // FIXME: CONTROLLER-1991: remove this assumption
+        assumeTrue(false);
+
+        assertEquals(UnsignedLongBitmap.of(), metadata.getClosedTransactions());
+        assertEquals("[[0.." + lastPurged + "]]", metadata.getPurgedTransactions().ranges().toString());
     }
 
     @Test
-    @Ignore("Flushes out tell based leak needs to be handled separately")
     public void testCloseTransactionMetadataLeak() throws Exception {
-        // Ask based frontend seems to have some issues with back to back close
-        Assume.assumeTrue(testParameter.isAssignableFrom(TestClientBackedDataStore.class));
+        // FIXME: Ask-based frontend seems to have some issues with back to back close
+        assumeTrue(testParameter.isAssignableFrom(TestClientBackedDataStore.class));
 
-        final String testName = "testWriteTransactionWithSingleShard";
-        initDatastoresWithCars(testName);
+        initDatastoresWithCars("testCloseTransactionMetadataLeak");
 
         final DOMStoreTransactionChain txChain = followerDistributedDataStore.createTransactionChain();
 
@@ -436,10 +439,9 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
             writeTx = txChain.newWriteOnlyTransaction();
             writeTx.close();
 
-            DOMStoreReadTransaction domStoreReadTransaction = txChain.newReadOnlyTransaction();
-            domStoreReadTransaction.read(CarsModel.BASE_PATH).get();
-
-            domStoreReadTransaction.close();
+            try (var tx = txChain.newReadOnlyTransaction()) {
+                tx.read(CarsModel.BASE_PATH).get();
+            }
         }
 
         writeTx = txChain.newWriteOnlyTransaction();
@@ -451,34 +453,25 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         await("Close transaction purge leak test.").atMost(5, TimeUnit.SECONDS)
                 .pollInterval(500, TimeUnit.MILLISECONDS)
                 .untilAsserted(() -> {
-                    Optional<ActorRef> localShard =
-                            leaderDistributedDataStore.getActorUtils().findLocalShard("cars");
-                    FrontendShardDataTreeSnapshotMetadata frontendMetadata =
+                    final var localShard = leaderDistributedDataStore.getActorUtils().findLocalShard("cars")
+                        .orElseThrow();
+                    final var frontendMetadata =
                             (FrontendShardDataTreeSnapshotMetadata) leaderDistributedDataStore.getActorUtils()
-                                    .executeOperation(localShard.get(), new RequestFrontendMetadata());
+                                    .executeOperation(localShard, new RequestFrontendMetadata());
 
+                    final var clientMeta = frontendMetadata.getClients().get(0);
                     if (leaderDistributedDataStore.getActorUtils().getDatastoreContext().isUseTellBasedProtocol()) {
-                        Iterator<FrontendHistoryMetadata> iterator =
-                                frontendMetadata.getClients().get(0).getCurrentHistories().iterator();
-                        FrontendHistoryMetadata metadata = iterator.next();
-                        while (iterator.hasNext() && metadata.getHistoryId() != 1) {
-                            metadata = iterator.next();
-                        }
-
-                        Set<Range<UnsignedLong>> ranges = metadata.getPurgedTransactions().asRanges();
-
-                        assertEquals(0, metadata.getClosedTransactions().size());
-                        assertEquals(1, ranges.size());
+                        assertTellClientMetadata(clientMeta, numCars * 2 + 1);
                     } else {
-                        // ask based should track no metadata
-                        assertTrue(frontendMetadata.getClients().get(0).getCurrentHistories().isEmpty());
+                        assertAskClientMetadata(clientMeta);
                     }
                 });
 
-        final Optional<NormalizedNode<?, ?>> optional = txChain.newReadOnlyTransaction()
-                .read(CarsModel.CAR_LIST_PATH).get(5, TimeUnit.SECONDS);
-        assertTrue("isPresent", optional.isPresent());
-        assertEquals("# cars", numCars, ((Collection<?>) optional.get().getValue()).size());
+        try (var tx = txChain.newReadOnlyTransaction()) {
+            final var body = tx.read(CarsModel.CAR_LIST_PATH).get(5, TimeUnit.SECONDS).orElseThrow().body();
+            assertThat(body, instanceOf(Collection.class));
+            assertEquals(numCars, ((Collection<?>) body).size());
+        }
     }
 
     @Test
@@ -515,11 +508,11 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         assertNotNull("newWriteOnlyTransaction returned null", writeTx);
 
         final YangInstanceIdentifier carsPath = CarsModel.BASE_PATH;
-        final NormalizedNode<?, ?> carsNode = CarsModel.emptyContainer();
+        final NormalizedNode carsNode = CarsModel.emptyContainer();
         writeTx.write(carsPath, carsNode);
 
         final YangInstanceIdentifier peoplePath = PeopleModel.BASE_PATH;
-        final NormalizedNode<?, ?> peopleNode = PeopleModel.emptyContainer();
+        final NormalizedNode peopleNode = PeopleModel.emptyContainer();
         writeTx.write(peoplePath, peopleNode);
 
         followerTestKit.doCommit(writeTx.ready());
@@ -538,11 +531,11 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         assertNotNull("newReadWriteTransaction returned null", rwTx);
 
         final YangInstanceIdentifier carsPath = CarsModel.BASE_PATH;
-        final NormalizedNode<?, ?> carsNode = CarsModel.emptyContainer();
+        final NormalizedNode carsNode = CarsModel.emptyContainer();
         rwTx.write(carsPath, carsNode);
 
         final YangInstanceIdentifier peoplePath = PeopleModel.BASE_PATH;
-        final NormalizedNode<?, ?> peopleNode = PeopleModel.emptyContainer();
+        final NormalizedNode peopleNode = PeopleModel.emptyContainer();
         rwTx.write(peoplePath, peopleNode);
 
         followerTestKit.doCommit(rwTx.ready());
@@ -629,13 +622,8 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         final YangInstanceIdentifier personPath = PeopleModel.newPersonPath("jack");
         readWriteTx.merge(personPath, person);
 
-        Optional<NormalizedNode<?, ?>> optional = readWriteTx.read(carPath).get(5, TimeUnit.SECONDS);
-        assertTrue("isPresent", optional.isPresent());
-        assertEquals("Data node", car, optional.get());
-
-        optional = readWriteTx.read(personPath).get(5, TimeUnit.SECONDS);
-        assertTrue("isPresent", optional.isPresent());
-        assertEquals("Data node", person, optional.get());
+        assertEquals(Optional.of(car), readWriteTx.read(carPath).get(5, TimeUnit.SECONDS));
+        assertEquals(Optional.of(person), readWriteTx.read(personPath).get(5, TimeUnit.SECONDS));
 
         final DOMStoreThreePhaseCommitCohort cohort2 = readWriteTx.ready();
 
@@ -653,8 +641,7 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         final DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
         verifyCars(readTx, car);
 
-        optional = readTx.read(personPath).get(5, TimeUnit.SECONDS);
-        assertFalse("isPresent", optional.isPresent());
+        assertEquals(Optional.empty(), readTx.read(personPath).get(5, TimeUnit.SECONDS));
     }
 
     @Test
@@ -666,7 +653,7 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
                         LogicalDatastoreType.CONFIGURATION, followerDistributedDataStore).build(),
                         MoreExecutors.directExecutor());
 
-        final DOMTransactionChainListener listener = Mockito.mock(DOMTransactionChainListener.class);
+        final DOMTransactionChainListener listener = mock(DOMTransactionChainListener.class);
         final DOMTransactionChain txChain = broker.createTransactionChain(listener);
 
         final DOMDataTreeWriteTransaction writeTx = txChain.newWriteOnlyTransaction();
@@ -677,12 +664,9 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
 
         writeTx.merge(LogicalDatastoreType.CONFIGURATION, CarsModel.BASE_PATH, invalidData);
 
-        try {
-            writeTx.commit().get(5, TimeUnit.SECONDS);
-            fail("Expected TransactionCommitFailedException");
-        } catch (final ExecutionException e) {
-            // Expected
-        }
+        final var ex = assertThrows(ExecutionException.class, () -> writeTx.commit().get(5, TimeUnit.SECONDS))
+            .getCause();
+        assertThat(ex, instanceOf(TransactionCommitFailedException.class));
 
         verify(listener, timeout(5000)).onTransactionChainFailed(eq(txChain), eq(writeTx), any(Throwable.class));
 
@@ -699,7 +683,7 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
                         LogicalDatastoreType.CONFIGURATION, followerDistributedDataStore).build(),
                         MoreExecutors.directExecutor());
 
-        final DOMTransactionChainListener listener = Mockito.mock(DOMTransactionChainListener.class);
+        final DOMTransactionChainListener listener = mock(DOMTransactionChainListener.class);
         final DOMTransactionChain txChain = broker.createTransactionChain(listener);
 
         final DOMDataTreeWriteTransaction writeTx = txChain.newWriteOnlyTransaction();
@@ -714,12 +698,9 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         // done for put for performance reasons.
         writeTx.merge(LogicalDatastoreType.CONFIGURATION, CarsModel.BASE_PATH, invalidData);
 
-        try {
-            writeTx.commit().get(5, TimeUnit.SECONDS);
-            fail("Expected TransactionCommitFailedException");
-        } catch (final ExecutionException e) {
-            // Expected
-        }
+        final var ex = assertThrows(ExecutionException.class, () -> writeTx.commit().get(5, TimeUnit.SECONDS))
+            .getCause();
+        assertThat(ex, instanceOf(TransactionCommitFailedException.class));
 
         verify(listener, timeout(5000)).onTransactionChainFailed(eq(txChain), eq(writeTx), any(Throwable.class));
 
@@ -839,11 +820,9 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         final ActorSelection txActor = leaderDistributedDataStore.getActorUtils().actorSelection(
                 ((ReadyTransactionReply)resp).getCohortPath());
 
-        final Supplier<Short> versionSupplier = Mockito.mock(Supplier.class);
-        Mockito.doReturn(DataStoreVersions.CURRENT_VERSION).when(versionSupplier).get();
-        ThreePhaseCommitCohortProxy cohort = new ThreePhaseCommitCohortProxy(
-                leaderDistributedDataStore.getActorUtils(), Arrays.asList(
-                        new ThreePhaseCommitCohortProxy.CohortInfo(Futures.successful(txActor), versionSupplier)), tx2);
+        ThreePhaseCommitCohortProxy cohort = new ThreePhaseCommitCohortProxy(leaderDistributedDataStore.getActorUtils(),
+            List.of(new ThreePhaseCommitCohortProxy.CohortInfo(Futures.successful(txActor),
+                () -> DataStoreVersions.CURRENT_VERSION)), tx2);
         cohort.canCommit().get(5, TimeUnit.SECONDS);
         cohort.preCommit().get(5, TimeUnit.SECONDS);
         cohort.commit().get(5, TimeUnit.SECONDS);
@@ -873,10 +852,9 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         final MapEntryNode car1 = CarsModel.newCarEntry("optima", Uint64.valueOf(20000));
         new WriteModification(CarsModel.newCarPath("optima"), car1).apply(modification);
 
-        ForwardedReadyTransaction forwardedReady = new ForwardedReadyTransaction(tx1,
-                DataStoreVersions.CURRENT_VERSION, new ReadWriteShardDataTreeTransaction(
-                        Mockito.mock(ShardDataTreeTransactionParent.class), tx1, modification), true,
-                Optional.empty());
+        ForwardedReadyTransaction forwardedReady = new ForwardedReadyTransaction(tx1, DataStoreVersions.CURRENT_VERSION,
+            new ReadWriteShardDataTreeTransaction(mock(ShardDataTreeTransactionParent.class), tx1, modification),
+            true, Optional.empty());
 
         carsFollowerShard.get().tell(forwardedReady, followerTestKit.getRef());
         Object resp = followerTestKit.expectMsgClass(Object.class);
@@ -894,10 +872,9 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         MapEntryNode car2 = CarsModel.newCarEntry("sportage", Uint64.valueOf(30000));
         new WriteModification(CarsModel.newCarPath("sportage"), car2).apply(modification);
 
-        forwardedReady = new ForwardedReadyTransaction(tx2,
-                DataStoreVersions.CURRENT_VERSION, new ReadWriteShardDataTreeTransaction(
-                        Mockito.mock(ShardDataTreeTransactionParent.class), tx2, modification), false,
-                Optional.empty());
+        forwardedReady = new ForwardedReadyTransaction(tx2, DataStoreVersions.CURRENT_VERSION,
+            new ReadWriteShardDataTreeTransaction(mock(ShardDataTreeTransactionParent.class), tx2, modification),
+            false, Optional.empty());
 
         carsFollowerShard.get().tell(forwardedReady, followerTestKit.getRef());
         resp = followerTestKit.expectMsgClass(Object.class);
@@ -910,11 +887,10 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         ActorSelection txActor = leaderDistributedDataStore.getActorUtils().actorSelection(
                 ((ReadyTransactionReply)resp).getCohortPath());
 
-        final Supplier<Short> versionSupplier = Mockito.mock(Supplier.class);
-        Mockito.doReturn(DataStoreVersions.CURRENT_VERSION).when(versionSupplier).get();
         final ThreePhaseCommitCohortProxy cohort = new ThreePhaseCommitCohortProxy(
-                leaderDistributedDataStore.getActorUtils(), Arrays.asList(
-                        new ThreePhaseCommitCohortProxy.CohortInfo(Futures.successful(txActor), versionSupplier)), tx2);
+            leaderDistributedDataStore.getActorUtils(), List.of(
+                new ThreePhaseCommitCohortProxy.CohortInfo(Futures.successful(txActor),
+                    () -> DataStoreVersions.CURRENT_VERSION)), tx2);
         cohort.canCommit().get(5, TimeUnit.SECONDS);
         cohort.preCommit().get(5, TimeUnit.SECONDS);
         cohort.commit().get(5, TimeUnit.SECONDS);
@@ -925,7 +901,8 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
     @Test
     public void testTransactionForwardedToLeaderAfterRetry() throws Exception {
         // FIXME: remove when test passes also for ClientBackedDataStore
-        Assume.assumeTrue(DistributedDataStore.class.isAssignableFrom(testParameter));
+        assumeTrue(DistributedDataStore.class.isAssignableFrom(testParameter));
+
         followerDatastoreContextBuilder.shardBatchedModificationCount(2);
         leaderDatastoreContextBuilder.shardBatchedModificationCount(2);
         initDatastoresWithCarsAndPeople("testTransactionForwardedToLeaderAfterRetry");
@@ -964,7 +941,7 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         cars.add(CarsModel.newCarEntry("car" + carIndex, Uint64.valueOf(carIndex)));
         writeTx2.write(CarsModel.newCarPath("car" + carIndex), cars.getLast());
         carIndex++;
-        NormalizedNode<?, ?> people = ImmutableNodes.mapNodeBuilder(PeopleModel.PERSON_QNAME)
+        NormalizedNode people = ImmutableNodes.mapNodeBuilder(PeopleModel.PERSON_QNAME)
                 .withChild(PeopleModel.newPersonEntry("Dude")).build();
         writeTx2.write(PeopleModel.PERSON_LIST_PATH, people);
         final DOMStoreThreePhaseCommitCohort writeTx2Cohort = writeTx2.ready();
@@ -1037,7 +1014,8 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
     @Test
     public void testLeadershipTransferOnShutdown() throws Exception {
         // FIXME: remove when test passes also for ClientBackedDataStore
-        Assume.assumeTrue(DistributedDataStore.class.isAssignableFrom(testParameter));
+        assumeTrue(DistributedDataStore.class.isAssignableFrom(testParameter));
+
         leaderDatastoreContextBuilder.shardBatchedModificationCount(1);
         followerDatastoreContextBuilder.shardElectionTimeoutFactor(10).customRaftPolicyImplementation(null);
         final String testName = "testLeadershipTransferOnShutdown";
@@ -1102,7 +1080,8 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
     @Test
     public void testTransactionWithIsolatedLeader() throws Exception {
         // FIXME: remove when test passes also for ClientBackedDataStore
-        Assume.assumeTrue(DistributedDataStore.class.isAssignableFrom(testParameter));
+        assumeTrue(DistributedDataStore.class.isAssignableFrom(testParameter));
+
         // Set the isolated leader check interval high so we can control the switch to IsolatedLeader.
         leaderDatastoreContextBuilder.shardIsolatedLeaderCheckIntervalInMillis(10000000);
         final String testName = "testTransactionWithIsolatedLeader";
@@ -1135,12 +1114,9 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         MemberNode.verifyRaftState(leaderDistributedDataStore, "cars",
             raftState -> assertEquals("getRaftState", "IsolatedLeader", raftState.getRaftState()));
 
-        try {
-            leaderTestKit.doCommit(noShardLeaderWriteTx.ready());
-            fail("Expected NoShardLeaderException");
-        } catch (final ExecutionException e) {
-            assertEquals("getCause", NoShardLeaderException.class, Throwables.getRootCause(e).getClass());
-        }
+        final var ex = assertThrows(ExecutionException.class,
+            () -> leaderTestKit.doCommit(noShardLeaderWriteTx.ready()));
+        assertEquals(NoShardLeaderException.class, Throwables.getRootCause(ex).getClass());
 
         sendDatastoreContextUpdate(leaderDistributedDataStore, leaderDatastoreContextBuilder
                 .shardElectionTimeoutFactor(100));
@@ -1176,17 +1152,13 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
 
         rwTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 
-        try {
-            followerTestKit.doCommit(rwTx.ready());
-            fail("Exception expected");
-        } catch (final ExecutionException e) {
-            final String msg = "Unexpected exception: " + Throwables.getStackTraceAsString(e.getCause());
-            if (DistributedDataStore.class.isAssignableFrom(testParameter)) {
-                assertTrue(msg, Throwables.getRootCause(e) instanceof NoShardLeaderException
-                        || e.getCause() instanceof ShardLeaderNotRespondingException);
-            } else {
-                assertTrue(msg, Throwables.getRootCause(e) instanceof RequestTimeoutException);
-            }
+        final var ex = assertThrows(ExecutionException.class, () -> followerTestKit.doCommit(rwTx.ready()));
+        final String msg = "Unexpected exception: " + Throwables.getStackTraceAsString(ex.getCause());
+        if (DistributedDataStore.class.isAssignableFrom(testParameter)) {
+            assertTrue(msg, Throwables.getRootCause(ex) instanceof NoShardLeaderException
+                || ex.getCause() instanceof ShardLeaderNotRespondingException);
+        } else {
+            assertThat(msg, Throwables.getRootCause(ex), instanceOf(RequestTimeoutException.class));
         }
     }
 
@@ -1215,16 +1187,12 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
 
         rwTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 
-        try {
-            followerTestKit.doCommit(rwTx.ready());
-            fail("Exception expected");
-        } catch (final ExecutionException e) {
-            final String msg = "Unexpected exception: " + Throwables.getStackTraceAsString(e.getCause());
-            if (DistributedDataStore.class.isAssignableFrom(testParameter)) {
-                assertTrue(msg, Throwables.getRootCause(e) instanceof NoShardLeaderException);
-            } else {
-                assertTrue(msg, Throwables.getRootCause(e) instanceof RequestTimeoutException);
-            }
+        final var ex = assertThrows(ExecutionException.class, () -> followerTestKit.doCommit(rwTx.ready()));
+        final String msg = "Unexpected exception: " + Throwables.getStackTraceAsString(ex.getCause());
+        if (DistributedDataStore.class.isAssignableFrom(testParameter)) {
+            assertThat(msg, Throwables.getRootCause(ex), instanceOf(NoShardLeaderException.class));
+        } else {
+            assertThat(msg, Throwables.getRootCause(ex), instanceOf(RequestTimeoutException.class));
         }
     }
 
@@ -1285,10 +1253,11 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         followerTestKit.waitForMembersUp("member-1", "member-3");
         follower2TestKit.waitForMembersUp("member-1", "member-2");
 
-        TestKit.shutdownActorSystem(follower2System);
+        // behavior is controlled by akka.coordinated-shutdown.run-by-actor-system-terminate configuration option
+        TestKit.shutdownActorSystem(follower2System, true);
 
         ActorRef cars = leaderDistributedDataStore.getActorUtils().findLocalShard("cars").get();
-        OnDemandRaftState initialState = (OnDemandRaftState) leaderDistributedDataStore.getActorUtils()
+        final OnDemandRaftState initialState = (OnDemandRaftState) leaderDistributedDataStore.getActorUtils()
                 .executeOperation(cars, GetOnDemandRaftState.INSTANCE);
 
         Cluster leaderCluster = Cluster.get(leaderSystem);
@@ -1298,9 +1267,9 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         Member follower2Member = follower2Cluster.readView().self();
 
         await().atMost(10, TimeUnit.SECONDS)
-                .until(() -> leaderCluster.readView().unreachableMembers().contains(follower2Member));
+                .until(() -> containsUnreachable(leaderCluster, follower2Member));
         await().atMost(10, TimeUnit.SECONDS)
-                .until(() -> followerCluster.readView().unreachableMembers().contains(follower2Member));
+                .until(() -> containsUnreachable(followerCluster, follower2Member));
 
         ActorRef followerCars = followerDistributedDataStore.getActorUtils().findLocalShard("cars").get();
 
@@ -1322,6 +1291,13 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
         ds2.close();
     }
 
+    private static Boolean containsUnreachable(final Cluster cluster, final Member member) {
+        // unreachableMembers() returns scala.collection.immutable.Set, but we are using scala.collection.Set to fix JDT
+        // see https://bugs.eclipse.org/bugs/show_bug.cgi?id=468276#c32
+        final Set<Member> members = cluster.readView().unreachableMembers();
+        return members.contains(member);
+    }
+
     @Test
     public void testInstallSnapshot() throws Exception {
         final String testName = "testInstallSnapshot";
@@ -1338,7 +1314,7 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
                 CarsModel.newCarsMapNode(CarsModel.newCarEntry("optima", Uint64.valueOf(20000))));
         AbstractShardTest.writeToStore(tree, CarsModel.BASE_PATH, carsNode);
 
-        final NormalizedNode<?, ?> snapshotRoot = AbstractShardTest.readStore(tree, YangInstanceIdentifier.empty());
+        final NormalizedNode snapshotRoot = AbstractShardTest.readStore(tree, YangInstanceIdentifier.empty());
         final Snapshot initialSnapshot = Snapshot.create(
                 new ShardSnapshotState(new MetadataShardDataTreeSnapshot(snapshotRoot)),
                 Collections.emptyList(), 5, 1, 5, 1, 1, null, null);
@@ -1349,10 +1325,8 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
 
         initDatastoresWithCars(testName);
 
-        final Optional<NormalizedNode<?, ?>> readOptional = leaderDistributedDataStore.newReadOnlyTransaction().read(
-                CarsModel.BASE_PATH).get(5, TimeUnit.SECONDS);
-        assertTrue("isPresent", readOptional.isPresent());
-        assertEquals("Node", carsNode, readOptional.get());
+        assertEquals(Optional.of(carsNode), leaderDistributedDataStore.newReadOnlyTransaction().read(
+            CarsModel.BASE_PATH).get(5, TimeUnit.SECONDS));
 
         verifySnapshot(InMemorySnapshotStore.waitForSavedSnapshot(leaderCarShardName, Snapshot.class),
                 initialSnapshot, snapshotRoot);
@@ -1364,7 +1338,7 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
     @Test
     public void testReadWriteMessageSlicing() throws Exception {
         // The slicing is only implemented for tell-based protocol
-        Assume.assumeTrue(ClientBackedDataStore.class.isAssignableFrom(testParameter));
+        assumeTrue(ClientBackedDataStore.class.isAssignableFrom(testParameter));
 
         leaderDatastoreContextBuilder.maximumMessageSliceSize(100);
         followerDatastoreContextBuilder.maximumMessageSliceSize(100);
@@ -1372,7 +1346,7 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
 
         final DOMStoreReadWriteTransaction rwTx = followerDistributedDataStore.newReadWriteTransaction();
 
-        final NormalizedNode<?, ?> carsNode = CarsModel.create();
+        final NormalizedNode carsNode = CarsModel.create();
         rwTx.write(CarsModel.BASE_PATH, carsNode);
 
         verifyNode(rwTx, CarsModel.BASE_PATH, carsNode);
@@ -1443,35 +1417,32 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
     }
 
     @Test
-    @Ignore("Writes to root node are not split into shards")
     public void testSnapshotOnRootOverwrite() throws Exception {
-        if (!DistributedDataStore.class.isAssignableFrom(testParameter)) {
-            // FIXME: ClientBackedDatastore does not have stable indexes/term, the snapshot index seems to fluctuate
-            return;
-        }
+        // FIXME: ClientBackedDatastore does not have stable indexes/term, the snapshot index seems to fluctuate
+        assumeTrue(DistributedDataStore.class.isAssignableFrom(testParameter));
 
         final String testName = "testSnapshotOnRootOverwrite";
-        String[] shards = {"cars", "default"};
-        initDatastores(testName, "module-shards-default-cars-member1.conf", shards,
+        final String[] shards = {"cars", "default"};
+        initDatastores(testName, "module-shards-default-cars-member1-and-2.conf", shards,
                 leaderDatastoreContextBuilder.snapshotOnRootOverwrite(true),
                 followerDatastoreContextBuilder.snapshotOnRootOverwrite(true));
 
         leaderTestKit.waitForMembersUp("member-2");
-        ContainerNode rootNode = ImmutableContainerNodeBuilder.create()
+        final ContainerNode rootNode = ImmutableContainerNodeBuilder.create()
                 .withNodeIdentifier(YangInstanceIdentifier.NodeIdentifier.create(SchemaContext.NAME))
-                .withChild((ContainerNode) CarsModel.create())
+                .withChild(CarsModel.create())
                 .build();
 
         leaderTestKit.testWriteTransaction(leaderDistributedDataStore, YangInstanceIdentifier.empty(), rootNode);
 
         IntegrationTestKit.verifyShardState(leaderDistributedDataStore, "cars",
-            state -> assertEquals(0, state.getSnapshotIndex()));
+            state -> assertEquals(1, state.getSnapshotIndex()));
 
         IntegrationTestKit.verifyShardState(followerDistributedDataStore, "cars",
-            state -> assertEquals(0, state.getSnapshotIndex()));
+            state -> assertEquals(1, state.getSnapshotIndex()));
 
-        verifySnapshot("member-1-shard-cars-testSnapshotOnRootOverwrite", 0);
-        verifySnapshot("member-2-shard-cars-testSnapshotOnRootOverwrite", 0);
+        verifySnapshot("member-1-shard-cars-testSnapshotOnRootOverwrite", 1);
+        verifySnapshot("member-2-shard-cars-testSnapshotOnRootOverwrite", 1);
 
         for (int i = 0; i < 10; i++) {
             leaderTestKit.testWriteTransaction(leaderDistributedDataStore, CarsModel.newCarPath("car " + i),
@@ -1480,28 +1451,28 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
 
         // fake snapshot causes the snapshotIndex to move
         IntegrationTestKit.verifyShardState(leaderDistributedDataStore, "cars",
-            state -> assertEquals(9, state.getSnapshotIndex()));
+            state -> assertEquals(10, state.getSnapshotIndex()));
         IntegrationTestKit.verifyShardState(followerDistributedDataStore, "cars",
-            state -> assertEquals(9, state.getSnapshotIndex()));
+            state -> assertEquals(10, state.getSnapshotIndex()));
 
-        // however the real snapshot still has not changed and was taken at index 0
-        verifySnapshot("member-1-shard-cars-testSnapshotOnRootOverwrite", 0);
-        verifySnapshot("member-2-shard-cars-testSnapshotOnRootOverwrite", 0);
+        // however the real snapshot still has not changed and was taken at index 1
+        verifySnapshot("member-1-shard-cars-testSnapshotOnRootOverwrite", 1);
+        verifySnapshot("member-2-shard-cars-testSnapshotOnRootOverwrite", 1);
 
         // root overwrite so expect a snapshot
         leaderTestKit.testWriteTransaction(leaderDistributedDataStore, YangInstanceIdentifier.empty(), rootNode);
 
-        // this was a real snapshot so everything should be in it(1 + 10 + 1)
+        // this was a real snapshot so everything should be in it(1(DisableTrackingPayload) + 1 + 10 + 1)
         IntegrationTestKit.verifyShardState(leaderDistributedDataStore, "cars",
-            state -> assertEquals(11, state.getSnapshotIndex()));
+            state -> assertEquals(12, state.getSnapshotIndex()));
         IntegrationTestKit.verifyShardState(followerDistributedDataStore, "cars",
-            state -> assertEquals(11, state.getSnapshotIndex()));
+            state -> assertEquals(12, state.getSnapshotIndex()));
 
-        verifySnapshot("member-1-shard-cars-testSnapshotOnRootOverwrite", 11);
-        verifySnapshot("member-2-shard-cars-testSnapshotOnRootOverwrite", 11);
+        verifySnapshot("member-1-shard-cars-testSnapshotOnRootOverwrite", 12);
+        verifySnapshot("member-2-shard-cars-testSnapshotOnRootOverwrite", 12);
     }
 
-    private void verifySnapshot(String persistenceId, long lastAppliedIndex) {
+    private void verifySnapshot(final String persistenceId, final long lastAppliedIndex) {
         await().atMost(5, TimeUnit.SECONDS).untilAsserted(() -> {
                 List<Snapshot> snap = InMemorySnapshotStore.getSnapshots(persistenceId, Snapshot.class);
                 assertEquals(1, snap.size());
@@ -1511,7 +1482,7 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
     }
 
     private static void verifySnapshot(final Snapshot actual, final Snapshot expected,
-                                       final NormalizedNode<?, ?> expRoot) {
+                                       final NormalizedNode expRoot) {
         assertEquals("Snapshot getLastAppliedTerm", expected.getLastAppliedTerm(), actual.getLastAppliedTerm());
         assertEquals("Snapshot getLastAppliedIndex", expected.getLastAppliedIndex(), actual.getLastAppliedIndex());
         assertEquals("Snapshot getLastTerm", expected.getLastTerm(), actual.getLastTerm());
@@ -1524,10 +1495,10 @@ public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
 
     private static void sendDatastoreContextUpdate(final AbstractDataStore dataStore, final Builder builder) {
         final Builder newBuilder = DatastoreContext.newBuilderFrom(builder.build());
-        final DatastoreContextFactory mockContextFactory = Mockito.mock(DatastoreContextFactory.class);
+        final DatastoreContextFactory mockContextFactory = mock(DatastoreContextFactory.class);
         final Answer<DatastoreContext> answer = invocation -> newBuilder.build();
-        Mockito.doAnswer(answer).when(mockContextFactory).getBaseDatastoreContext();
-        Mockito.doAnswer(answer).when(mockContextFactory).getShardDatastoreContext(Mockito.anyString());
+        doAnswer(answer).when(mockContextFactory).getBaseDatastoreContext();
+        doAnswer(answer).when(mockContextFactory).getShardDatastoreContext(anyString());
         dataStore.onDatastoreContextUpdated(mockContextFactory);
     }
 }