opendaylight/md-sal/sal-cluster-admin/src/test/java/org/opendaylight/controller/cluster/datastore/admin/ClusterAdminRpcServiceTest.java

   1 /*
   2  * Copyright (c) 2015 Brocade Communications Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.cluster.datastore.admin;
   9
  10 import static org.hamcrest.CoreMatchers.anyOf;
  11 import static org.hamcrest.CoreMatchers.containsString;
  12 import static org.junit.Assert.assertEquals;
  13 import static org.junit.Assert.assertNotNull;
  14 import static org.junit.Assert.assertNull;
  15 import static org.junit.Assert.assertThat;
  16 import static org.junit.Assert.assertTrue;
  17 import static org.junit.Assert.fail;
  18 import static org.opendaylight.controller.cluster.datastore.MemberNode.verifyNoShardPresent;
  19 import static org.opendaylight.controller.cluster.datastore.MemberNode.verifyRaftPeersPresent;
  20 import static org.opendaylight.controller.cluster.datastore.MemberNode.verifyRaftState;
  21 import akka.actor.ActorRef;
  22 import akka.actor.PoisonPill;
  23 import akka.actor.Status.Success;
  24 import akka.cluster.Cluster;
  25 import com.google.common.base.Optional;
  26 import com.google.common.collect.ImmutableList;
  27 import com.google.common.collect.ImmutableMap;
  28 import com.google.common.collect.Iterables;
  29 import com.google.common.collect.Lists;
  30 import com.google.common.collect.Sets;
  31 import java.io.File;
  32 import java.io.FileInputStream;
  33 import java.net.URI;
  34 import java.util.AbstractMap.SimpleEntry;
  35 import java.util.ArrayList;
  36 import java.util.Arrays;
  37 import java.util.HashMap;
  38 import java.util.HashSet;
  39 import java.util.List;
  40 import java.util.Map;
  41 import java.util.Map.Entry;
  42 import java.util.Set;
  43 import java.util.concurrent.TimeUnit;
  44 import org.apache.commons.lang3.SerializationUtils;
  45 import org.junit.After;
  46 import org.junit.Before;
  47 import org.junit.Test;
  48 import org.opendaylight.controller.cluster.access.concepts.MemberName;
  49 import org.opendaylight.controller.cluster.datastore.DatastoreContext;
  50 import org.opendaylight.controller.cluster.datastore.DistributedDataStore;
  51 import org.opendaylight.controller.cluster.datastore.MemberNode;
  52 import org.opendaylight.controller.cluster.datastore.MemberNode.RaftStateVerifier;
  53 import org.opendaylight.controller.cluster.datastore.Shard;
  54 import org.opendaylight.controller.cluster.datastore.config.ModuleShardConfiguration;
  55 import org.opendaylight.controller.cluster.datastore.identifiers.ShardIdentifier;
  56 import org.opendaylight.controller.cluster.datastore.messages.CreateShard;
  57 import org.opendaylight.controller.cluster.datastore.messages.DatastoreSnapshot;
  58 import org.opendaylight.controller.cluster.raft.RaftState;
  59 import org.opendaylight.controller.cluster.raft.ReplicatedLogImplEntry;
  60 import org.opendaylight.controller.cluster.raft.persisted.ServerConfigurationPayload;
  61 import org.opendaylight.controller.cluster.raft.persisted.ServerInfo;
  62 import org.opendaylight.controller.cluster.raft.base.messages.UpdateElectionTerm;
  63 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  64 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  65 import org.opendaylight.controller.md.cluster.datastore.model.CarsModel;
  66 import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
  67 import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.AddReplicasForAllShardsOutput;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.AddShardReplicaInputBuilder;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.BackupDatastoreInputBuilder;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.ChangeMemberVotingStatesForAllShardsInputBuilder;
  72 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.ChangeMemberVotingStatesForAllShardsOutput;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.ChangeMemberVotingStatesForShardInputBuilder;
  74 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.DataStoreType;
  75 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.FlipMemberVotingStatesForAllShardsOutput;
  76 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.RemoveAllShardReplicasInputBuilder;
  77 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.RemoveAllShardReplicasOutput;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.RemoveShardReplicaInputBuilder;
  79 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.member.voting.states.input.MemberVotingStateBuilder;
  80 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.shard.result.output.ShardResult;
  81 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.shard.result.output.ShardResultBuilder;
  82 import org.opendaylight.yangtools.yang.common.RpcError;
  83 import org.opendaylight.yangtools.yang.common.RpcResult;
  84 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  85
  86 /**
  87  * Unit tests for ClusterAdminRpcService.
  88  *
  89  * @author Thomas Pantelis
  90  */
  91 public class ClusterAdminRpcServiceTest {
  92     private static final MemberName MEMBER_1 = MemberName.forName("member-1");
  93     private static final MemberName MEMBER_2 = MemberName.forName("member-2");
  94     private static final MemberName MEMBER_3 = MemberName.forName("member-3");
  95     private final List<MemberNode> memberNodes = new ArrayList<>();
  96
  97     @Before
  98     public void setUp() {
  99         InMemoryJournal.clear();
 100         InMemorySnapshotStore.clear();
 101     }
 102
 103     @After
 104     public void tearDown() {
 105         for (MemberNode m : Lists.reverse(memberNodes)) {
 106             m.cleanup();
 107         }
 108         memberNodes.clear();
 109     }
 110
 111     @Test
 112     public void testBackupDatastore() throws Exception {
 113         MemberNode node = MemberNode.builder(memberNodes).akkaConfig("Member1").
 114                 moduleShardsConfig("module-shards-member1.conf").
 115                 waitForShardLeader("cars", "people").testName("testBackupDatastore").build();
 116
 117         String fileName = "target/testBackupDatastore";
 118         new File(fileName).delete();
 119
 120         ClusterAdminRpcService service = new ClusterAdminRpcService(node.configDataStore(), node.operDataStore());
 121
 122         RpcResult<Void> rpcResult = service .backupDatastore(new BackupDatastoreInputBuilder().
 123                 setFilePath(fileName).build()).get(5, TimeUnit.SECONDS);
 124         verifySuccessfulRpcResult(rpcResult);
 125
 126         try(FileInputStream fis = new FileInputStream(fileName)) {
 127             List<DatastoreSnapshot> snapshots = SerializationUtils.deserialize(fis);
 128             assertEquals("DatastoreSnapshot size", 2, snapshots.size());
 129
 130             ImmutableMap<String, DatastoreSnapshot> map = ImmutableMap.of(snapshots.get(0).getType(), snapshots.get(0),
 131                     snapshots.get(1).getType(), snapshots.get(1));
 132             verifyDatastoreSnapshot(node.configDataStore().getActorContext().getDataStoreName(),
 133                     map.get(node.configDataStore().getActorContext().getDataStoreName()), "cars", "people");
 134         } finally {
 135             new File(fileName).delete();
 136         }
 137
 138         // Test failure by killing a shard.
 139
 140         node.configDataStore().getActorContext().getShardManager().tell(node.datastoreContextBuilder().
 141                 shardInitializationTimeout(200, TimeUnit.MILLISECONDS).build(), ActorRef.noSender());
 142
 143         ActorRef carsShardActor = node.configDataStore().getActorContext().findLocalShard("cars").get();
 144         node.kit().watch(carsShardActor);
 145         carsShardActor.tell(PoisonPill.getInstance(), ActorRef.noSender());
 146         node.kit().expectTerminated(carsShardActor);
 147
 148         rpcResult = service.backupDatastore(new BackupDatastoreInputBuilder().setFilePath(fileName).build()).
 149                 get(5, TimeUnit.SECONDS);
 150         assertEquals("isSuccessful", false, rpcResult.isSuccessful());
 151         assertEquals("getErrors", 1, rpcResult.getErrors().size());
 152     }
 153
 154     private static void verifyDatastoreSnapshot(String type, DatastoreSnapshot datastoreSnapshot, String... expShardNames) {
 155         assertNotNull("Missing DatastoreSnapshot for type " + type, datastoreSnapshot);
 156         Set<String> shardNames = new HashSet<>();
 157         for(DatastoreSnapshot.ShardSnapshot s: datastoreSnapshot.getShardSnapshots()) {
 158             shardNames.add(s.getName());
 159         }
 160
 161         assertEquals("DatastoreSnapshot shard names", Sets.newHashSet(expShardNames), shardNames);
 162     }
 163
 164     @Test
 165     public void testAddShardReplica() throws Exception {
 166         String name = "testAddShardReplica";
 167         String moduleShardsConfig = "module-shards-cars-member-1.conf";
 168         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 169                 moduleShardsConfig(moduleShardsConfig).waitForShardLeader("cars").build();
 170
 171         MemberNode newReplicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 172                 moduleShardsConfig(moduleShardsConfig).build();
 173
 174         leaderNode1.waitForMembersUp("member-2");
 175
 176         doAddShardReplica(newReplicaNode2, "cars", "member-1");
 177
 178         MemberNode newReplicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 179                 moduleShardsConfig(moduleShardsConfig).build();
 180
 181         leaderNode1.waitForMembersUp("member-3");
 182         newReplicaNode2.waitForMembersUp("member-3");
 183
 184         doAddShardReplica(newReplicaNode3, "cars", "member-1", "member-2");
 185
 186         verifyRaftPeersPresent(newReplicaNode2.configDataStore(), "cars", "member-1", "member-3");
 187         verifyRaftPeersPresent(newReplicaNode2.operDataStore(), "cars", "member-1", "member-3");
 188
 189         // Write data to member-2's config datastore and read/verify via member-3
 190         NormalizedNode<?, ?> configCarsNode = writeCarsNodeAndVerify(newReplicaNode2.configDataStore(),
 191                 newReplicaNode3.configDataStore());
 192
 193         // Write data to member-3's oper datastore and read/verify via member-2
 194         writeCarsNodeAndVerify(newReplicaNode3.operDataStore(), newReplicaNode2.operDataStore());
 195
 196         // Verify all data has been replicated. We expect 3 log entries and thus last applied index of 2 -
 197         // 2 ServerConfigurationPayload entries and the transaction payload entry.
 198
 199         RaftStateVerifier verifier = raftState -> {
 200             assertEquals("Commit index", 2, raftState.getCommitIndex());
 201             assertEquals("Last applied index", 2, raftState.getLastApplied());
 202         };
 203
 204         verifyRaftState(leaderNode1.configDataStore(), "cars", verifier);
 205         verifyRaftState(leaderNode1.operDataStore(), "cars", verifier);
 206
 207         verifyRaftState(newReplicaNode2.configDataStore(), "cars", verifier);
 208         verifyRaftState(newReplicaNode2.operDataStore(), "cars", verifier);
 209
 210         verifyRaftState(newReplicaNode3.configDataStore(), "cars", verifier);
 211         verifyRaftState(newReplicaNode3.operDataStore(), "cars", verifier);
 212
 213         // Restart member-3 and verify the cars config shard is re-instated.
 214
 215         Cluster.get(leaderNode1.kit().getSystem()).down(Cluster.get(newReplicaNode3.kit().getSystem()).selfAddress());
 216         newReplicaNode3.cleanup();
 217
 218         newReplicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 219                 moduleShardsConfig(moduleShardsConfig).createOperDatastore(false).build();
 220
 221         verifyRaftState(newReplicaNode3.configDataStore(), "cars", verifier);
 222         readCarsNodeAndVerify(newReplicaNode3.configDataStore(), configCarsNode);
 223     }
 224
 225     @Test
 226     public void testAddShardReplicaFailures() throws Exception {
 227         String name = "testAddShardReplicaFailures";
 228         MemberNode memberNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name).
 229                 moduleShardsConfig("module-shards-cars-member-1.conf").build();
 230
 231         ClusterAdminRpcService service = new ClusterAdminRpcService(memberNode.configDataStore(),
 232                 memberNode.operDataStore());
 233
 234         RpcResult<Void> rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().
 235                 setDataStoreType(DataStoreType.Config).build()).get(10, TimeUnit.SECONDS);
 236         verifyFailedRpcResult(rpcResult);
 237
 238         rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().setShardName("cars").
 239                 build()).get(10, TimeUnit.SECONDS);
 240         verifyFailedRpcResult(rpcResult);
 241
 242         rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().setShardName("people").
 243                 setDataStoreType(DataStoreType.Config).build()).get(10, TimeUnit.SECONDS);
 244         verifyFailedRpcResult(rpcResult);
 245     }
 246
 247     private static NormalizedNode<?, ?> writeCarsNodeAndVerify(DistributedDataStore writeToStore,
 248             DistributedDataStore readFromStore) throws Exception {
 249         DOMStoreWriteTransaction writeTx = writeToStore.newWriteOnlyTransaction();
 250         NormalizedNode<?, ?> carsNode = CarsModel.create();
 251         writeTx.write(CarsModel.BASE_PATH, carsNode);
 252
 253         DOMStoreThreePhaseCommitCohort cohort = writeTx.ready();
 254         Boolean canCommit = cohort .canCommit().get(7, TimeUnit.SECONDS);
 255         assertEquals("canCommit", true, canCommit);
 256         cohort.preCommit().get(5, TimeUnit.SECONDS);
 257         cohort.commit().get(5, TimeUnit.SECONDS);
 258
 259         readCarsNodeAndVerify(readFromStore, carsNode);
 260         return carsNode;
 261     }
 262
 263     private static void readCarsNodeAndVerify(DistributedDataStore readFromStore,
 264             NormalizedNode<?, ?> expCarsNode) throws Exception {
 265         Optional<NormalizedNode<?, ?>> optional = readFromStore.newReadOnlyTransaction().
 266                 read(CarsModel.BASE_PATH).get(15, TimeUnit.SECONDS);
 267         assertEquals("isPresent", true, optional.isPresent());
 268         assertEquals("Data node", expCarsNode, optional.get());
 269     }
 270
 271     private static void doAddShardReplica(MemberNode memberNode, String shardName, String... peerMemberNames)
 272             throws Exception {
 273         memberNode.waitForMembersUp(peerMemberNames);
 274
 275         ClusterAdminRpcService service = new ClusterAdminRpcService(memberNode.configDataStore(),
 276                 memberNode.operDataStore());
 277
 278         RpcResult<Void> rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().setShardName(shardName).
 279                 setDataStoreType(DataStoreType.Config).build()).get(10, TimeUnit.SECONDS);
 280         verifySuccessfulRpcResult(rpcResult);
 281
 282         verifyRaftPeersPresent(memberNode.configDataStore(), shardName, peerMemberNames);
 283
 284         Optional<ActorRef> optional = memberNode.operDataStore().getActorContext().findLocalShard(shardName);
 285         assertEquals("Oper shard present", false, optional.isPresent());
 286
 287         rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().setShardName(shardName).
 288                 setDataStoreType(DataStoreType.Operational).build()).get(10, TimeUnit.SECONDS);
 289         verifySuccessfulRpcResult(rpcResult);
 290
 291         verifyRaftPeersPresent(memberNode.operDataStore(), shardName, peerMemberNames);
 292     }
 293
 294     private static <T> T verifySuccessfulRpcResult(RpcResult<T> rpcResult) {
 295         if(!rpcResult.isSuccessful()) {
 296             if(rpcResult.getErrors().size() > 0) {
 297                 RpcError error = Iterables.getFirst(rpcResult.getErrors(), null);
 298                 throw new AssertionError("Rpc failed with error: " + error, error.getCause());
 299             }
 300
 301             fail("Rpc failed with no error");
 302         }
 303
 304         return rpcResult.getResult();
 305     }
 306
 307     private static void verifyFailedRpcResult(RpcResult<Void> rpcResult) {
 308         assertEquals("RpcResult", false, rpcResult.isSuccessful());
 309         assertEquals("RpcResult errors size", 1, rpcResult.getErrors().size());
 310         RpcError error = Iterables.getFirst(rpcResult.getErrors(), null);
 311         assertNotNull("RpcResult error message null", error.getMessage());
 312     }
 313
 314     @Test
 315     public void testRemoveShardReplica() throws Exception {
 316         String name = "testRemoveShardReplica";
 317         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 318         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 319                 moduleShardsConfig(moduleShardsConfig).
 320                 datastoreContextBuilder(DatastoreContext.newBuilder().
 321                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 322
 323         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 324                 moduleShardsConfig(moduleShardsConfig).build();
 325
 326         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 327                 moduleShardsConfig(moduleShardsConfig).build();
 328
 329         leaderNode1.configDataStore().waitTillReady();
 330         replicaNode3.configDataStore().waitTillReady();
 331         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2", "member-3");
 332         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1", "member-3");
 333         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-1", "member-2");
 334
 335         // Invoke RPC service on member-3 to remove it's local shard
 336
 337         ClusterAdminRpcService service3 = new ClusterAdminRpcService(replicaNode3.configDataStore(),
 338                 replicaNode3.operDataStore());
 339
 340         RpcResult<Void> rpcResult = service3.removeShardReplica(new RemoveShardReplicaInputBuilder().
 341                 setShardName("cars").setMemberName("member-3").setDataStoreType(DataStoreType.Config).build()).
 342                         get(10, TimeUnit.SECONDS);
 343         verifySuccessfulRpcResult(rpcResult);
 344
 345         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2");
 346         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1");
 347         verifyNoShardPresent(replicaNode3.configDataStore(), "cars");
 348
 349         // Restart member-2 and verify member-3 isn't present.
 350
 351         Cluster.get(leaderNode1.kit().getSystem()).down(Cluster.get(replicaNode2.kit().getSystem()).selfAddress());
 352         replicaNode2.cleanup();
 353
 354         replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 355                 moduleShardsConfig(moduleShardsConfig).build();
 356
 357         replicaNode2.configDataStore().waitTillReady();
 358         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1");
 359
 360         // Invoke RPC service on member-1 to remove member-2
 361
 362         ClusterAdminRpcService service1 = new ClusterAdminRpcService(leaderNode1.configDataStore(),
 363                 leaderNode1.operDataStore());
 364
 365         rpcResult = service1.removeShardReplica(new RemoveShardReplicaInputBuilder().
 366                 setShardName("cars").setMemberName("member-2").setDataStoreType(DataStoreType.Config).build()).
 367                         get(10, TimeUnit.SECONDS);
 368         verifySuccessfulRpcResult(rpcResult);
 369
 370         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars");
 371         verifyNoShardPresent(replicaNode2.configDataStore(), "cars");
 372     }
 373
 374     @Test
 375     public void testRemoveShardLeaderReplica() throws Exception {
 376         String name = "testRemoveShardLeaderReplica";
 377         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 378         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 379                 moduleShardsConfig(moduleShardsConfig).
 380                 datastoreContextBuilder(DatastoreContext.newBuilder().
 381                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 382
 383         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 384                 moduleShardsConfig(moduleShardsConfig).build();
 385
 386         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 387                 moduleShardsConfig(moduleShardsConfig).build();
 388
 389         leaderNode1.configDataStore().waitTillReady();
 390         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2", "member-3");
 391         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1", "member-3");
 392         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-1", "member-2");
 393
 394         replicaNode2.waitForMembersUp("member-1", "member-3");
 395         replicaNode3.waitForMembersUp("member-1", "member-2");
 396
 397         // Invoke RPC service on leader member-1 to remove it's local shard
 398
 399         ClusterAdminRpcService service1 = new ClusterAdminRpcService(leaderNode1.configDataStore(),
 400                 leaderNode1.operDataStore());
 401
 402         RpcResult<Void> rpcResult = service1.removeShardReplica(new RemoveShardReplicaInputBuilder().
 403                 setShardName("cars").setMemberName("member-1").setDataStoreType(DataStoreType.Config).build()).
 404                         get(10, TimeUnit.SECONDS);
 405         verifySuccessfulRpcResult(rpcResult);
 406
 407         verifyRaftState(replicaNode2.configDataStore(), "cars", raftState ->
 408                 assertThat("Leader Id", raftState.getLeader(), anyOf(containsString("member-2"), containsString("member-3"))));
 409
 410         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-3");
 411         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-2");
 412         verifyNoShardPresent(leaderNode1.configDataStore(), "cars");
 413     }
 414
 415     @Test
 416     public void testAddReplicasForAllShards() throws Exception {
 417         String name = "testAddReplicasForAllShards";
 418         String moduleShardsConfig = "module-shards-member1.conf";
 419         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 420                 moduleShardsConfig(moduleShardsConfig).waitForShardLeader("cars", "people").build();
 421
 422         ModuleShardConfiguration petsModuleConfig = new ModuleShardConfiguration(URI.create("pets-ns"), "pets-module",
 423                 "pets", null, Arrays.asList(MEMBER_1));
 424         leaderNode1.configDataStore().getActorContext().getShardManager().tell(
 425                 new CreateShard(petsModuleConfig, Shard.builder(), null), leaderNode1.kit().getRef());
 426         leaderNode1.kit().expectMsgClass(Success.class);
 427         leaderNode1.kit().waitUntilLeader(leaderNode1.configDataStore().getActorContext(), "pets");
 428
 429         MemberNode newReplicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 430                 moduleShardsConfig(moduleShardsConfig).build();
 431
 432         leaderNode1.waitForMembersUp("member-2");
 433         newReplicaNode2.waitForMembersUp("member-1");
 434
 435         newReplicaNode2.configDataStore().getActorContext().getShardManager().tell(
 436                 new CreateShard(petsModuleConfig, Shard.builder(), null), newReplicaNode2.kit().getRef());
 437         newReplicaNode2.kit().expectMsgClass(Success.class);
 438
 439         newReplicaNode2.operDataStore().getActorContext().getShardManager().tell(
 440                 new CreateShard(new ModuleShardConfiguration(URI.create("no-leader-ns"), "no-leader-module",
 441                         "no-leader", null, Arrays.asList(MEMBER_1)), Shard.builder(), null),
 442                                 newReplicaNode2.kit().getRef());
 443         newReplicaNode2.kit().expectMsgClass(Success.class);
 444
 445         ClusterAdminRpcService service = new ClusterAdminRpcService(newReplicaNode2.configDataStore(),
 446                 newReplicaNode2.operDataStore());
 447
 448         RpcResult<AddReplicasForAllShardsOutput> rpcResult = service.addReplicasForAllShards().get(10, TimeUnit.SECONDS);
 449         AddReplicasForAllShardsOutput result = verifySuccessfulRpcResult(rpcResult);
 450         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 451                 successShardResult("people", DataStoreType.Config),
 452                 successShardResult("pets", DataStoreType.Config),
 453                 successShardResult("cars", DataStoreType.Operational),
 454                 successShardResult("people", DataStoreType.Operational),
 455                 failedShardResult("no-leader", DataStoreType.Operational));
 456
 457         verifyRaftPeersPresent(newReplicaNode2.configDataStore(), "cars", "member-1");
 458         verifyRaftPeersPresent(newReplicaNode2.configDataStore(), "people", "member-1");
 459         verifyRaftPeersPresent(newReplicaNode2.configDataStore(), "pets", "member-1");
 460         verifyRaftPeersPresent(newReplicaNode2.operDataStore(), "cars", "member-1");
 461         verifyRaftPeersPresent(newReplicaNode2.operDataStore(), "people", "member-1");
 462     }
 463
 464     @Test
 465     public void testRemoveAllShardReplicas() throws Exception {
 466         String name = "testRemoveAllShardReplicas";
 467         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 468         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 469                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 470                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 471
 472         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 473                 moduleShardsConfig(moduleShardsConfig).build();
 474
 475         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 476                 moduleShardsConfig(moduleShardsConfig).build();
 477
 478         leaderNode1.configDataStore().waitTillReady();
 479         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2", "member-3");
 480         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1", "member-3");
 481         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-1", "member-2");
 482
 483         ModuleShardConfiguration petsModuleConfig = new ModuleShardConfiguration(URI.create("pets-ns"), "pets-module",
 484                 "pets", null, Arrays.asList(MEMBER_1, MEMBER_2, MEMBER_3));
 485         leaderNode1.configDataStore().getActorContext().getShardManager().tell(
 486                 new CreateShard(petsModuleConfig, Shard.builder(), null), leaderNode1.kit().getRef());
 487         leaderNode1.kit().expectMsgClass(Success.class);
 488
 489         replicaNode2.configDataStore().getActorContext().getShardManager().tell(
 490                 new CreateShard(petsModuleConfig, Shard.builder(), null), replicaNode2.kit().getRef());
 491         replicaNode2.kit().expectMsgClass(Success.class);
 492
 493         replicaNode3.configDataStore().getActorContext().getShardManager().tell(
 494                 new CreateShard(petsModuleConfig, Shard.builder(), null), replicaNode3.kit().getRef());
 495         replicaNode3.kit().expectMsgClass(Success.class);
 496
 497         verifyRaftPeersPresent(leaderNode1.configDataStore(), "pets", "member-2", "member-3");
 498         verifyRaftPeersPresent(replicaNode2.configDataStore(), "pets", "member-1", "member-3");
 499         verifyRaftPeersPresent(replicaNode3.configDataStore(), "pets", "member-1", "member-2");
 500
 501         ClusterAdminRpcService service3 = new ClusterAdminRpcService(replicaNode3.configDataStore(),
 502                 replicaNode3.operDataStore());
 503
 504         RpcResult<RemoveAllShardReplicasOutput> rpcResult = service3.removeAllShardReplicas(
 505                 new RemoveAllShardReplicasInputBuilder().setMemberName("member-3").build()).get(10, TimeUnit.SECONDS);
 506         RemoveAllShardReplicasOutput result = verifySuccessfulRpcResult(rpcResult);
 507         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 508                 successShardResult("people", DataStoreType.Config),
 509                 successShardResult("pets", DataStoreType.Config),
 510                 successShardResult("cars", DataStoreType.Operational),
 511                 successShardResult("people", DataStoreType.Operational));
 512
 513         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2");
 514         verifyRaftPeersPresent(leaderNode1.configDataStore(), "people", "member-2");
 515         verifyRaftPeersPresent(leaderNode1.configDataStore(), "pets", "member-2");
 516         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1");
 517         verifyRaftPeersPresent(replicaNode2.configDataStore(), "people", "member-1");
 518         verifyRaftPeersPresent(replicaNode2.configDataStore(), "pets", "member-1");
 519         verifyNoShardPresent(replicaNode3.configDataStore(), "cars");
 520         verifyNoShardPresent(replicaNode3.configDataStore(), "people");
 521         verifyNoShardPresent(replicaNode3.configDataStore(), "pets");
 522     }
 523
 524     @Test
 525     public void testChangeMemberVotingStatesForShard() throws Exception {
 526         String name = "testChangeMemberVotingStatusForShard";
 527         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 528         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 529                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 530                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 531
 532         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 533                 moduleShardsConfig(moduleShardsConfig).build();
 534
 535         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 536                 moduleShardsConfig(moduleShardsConfig).build();
 537
 538         leaderNode1.configDataStore().waitTillReady();
 539         replicaNode3.configDataStore().waitTillReady();
 540         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2", "member-3");
 541         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1", "member-3");
 542         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-1", "member-2");
 543
 544         // Invoke RPC service on member-3 to change voting status
 545
 546         ClusterAdminRpcService service3 = new ClusterAdminRpcService(replicaNode3.configDataStore(),
 547                 replicaNode3.operDataStore());
 548
 549         RpcResult<Void> rpcResult = service3.changeMemberVotingStatesForShard(
 550                 new ChangeMemberVotingStatesForShardInputBuilder().setShardName("cars").
 551                     setDataStoreType(DataStoreType.Config).setMemberVotingState(ImmutableList.of(
 552                         new MemberVotingStateBuilder().setMemberName("member-2").setVoting(false).build(),
 553                         new MemberVotingStateBuilder().setMemberName("member-3").setVoting(false).build())).build()).
 554                 get(10, TimeUnit.SECONDS);
 555         verifySuccessfulRpcResult(rpcResult);
 556
 557         verifyVotingStates(leaderNode1.configDataStore(), "cars", new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", false),
 558                 new SimpleEntry<>("member-3", false));
 559         verifyVotingStates(replicaNode2.configDataStore(), "cars", new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", false),
 560                 new SimpleEntry<>("member-3", false));
 561         verifyVotingStates(replicaNode3.configDataStore(), "cars", new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", false),
 562                 new SimpleEntry<>("member-3", false));
 563     }
 564
 565     @Test
 566     public void testChangeMemberVotingStatesForSingleNodeShard() throws Exception {
 567         String name = "testChangeMemberVotingStatesForSingleNodeShard";
 568         String moduleShardsConfig = "module-shards-member1.conf";
 569         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 570                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 571                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 572
 573         leaderNode.configDataStore().waitTillReady();
 574
 575         // Invoke RPC service on member-3 to change voting status
 576
 577         ClusterAdminRpcService service = new ClusterAdminRpcService(leaderNode.configDataStore(),
 578                 leaderNode.operDataStore());
 579
 580         RpcResult<Void> rpcResult = service.changeMemberVotingStatesForShard(
 581                 new ChangeMemberVotingStatesForShardInputBuilder().setShardName("cars").
 582                     setDataStoreType(DataStoreType.Config).setMemberVotingState(ImmutableList.of(
 583                         new MemberVotingStateBuilder().setMemberName("member-1").setVoting(false).build())).build()).
 584                 get(10, TimeUnit.SECONDS);
 585         verifyFailedRpcResult(rpcResult);
 586
 587         verifyVotingStates(leaderNode.configDataStore(), "cars", new SimpleEntry<>("member-1", true));
 588     }
 589
 590     @Test
 591     public void testChangeMemberVotingStatesForAllShards() throws Exception {
 592         String name = "testChangeMemberVotingStatesForAllShards";
 593         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 594         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 595                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 596                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 597
 598         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 599                 moduleShardsConfig(moduleShardsConfig).build();
 600
 601         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 602                 moduleShardsConfig(moduleShardsConfig).build();
 603
 604         leaderNode1.configDataStore().waitTillReady();
 605         leaderNode1.operDataStore().waitTillReady();
 606         replicaNode3.configDataStore().waitTillReady();
 607         replicaNode3.operDataStore().waitTillReady();
 608         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2", "member-3");
 609         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1", "member-3");
 610         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-1", "member-2");
 611
 612         // Invoke RPC service on member-3 to change voting status
 613
 614         ClusterAdminRpcService service3 = new ClusterAdminRpcService(replicaNode3.configDataStore(),
 615                 replicaNode3.operDataStore());
 616
 617         RpcResult<ChangeMemberVotingStatesForAllShardsOutput> rpcResult = service3.changeMemberVotingStatesForAllShards(
 618                 new ChangeMemberVotingStatesForAllShardsInputBuilder().setMemberVotingState(ImmutableList.of(
 619                         new MemberVotingStateBuilder().setMemberName("member-2").setVoting(false).build(),
 620                         new MemberVotingStateBuilder().setMemberName("member-3").setVoting(false).build())).build()).
 621                 get(10, TimeUnit.SECONDS);
 622         ChangeMemberVotingStatesForAllShardsOutput result = verifySuccessfulRpcResult(rpcResult);
 623         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 624                 successShardResult("people", DataStoreType.Config),
 625                 successShardResult("cars", DataStoreType.Operational),
 626                 successShardResult("people", DataStoreType.Operational));
 627
 628         verifyVotingStates(new DistributedDataStore[]{leaderNode1.configDataStore(), leaderNode1.operDataStore(),
 629                 replicaNode2.configDataStore(), replicaNode2.operDataStore(),
 630                 replicaNode3.configDataStore(), replicaNode3.operDataStore()},
 631                 new String[]{"cars", "people"}, new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", false),
 632                 new SimpleEntry<>("member-3", false));
 633     }
 634
 635     @Test
 636     public void testFlipMemberVotingStates() throws Exception {
 637         String name = "testFlipMemberVotingStates";
 638
 639         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
 640                 new ServerInfo("member-1", true), new ServerInfo("member-2", true),
 641                 new ServerInfo("member-3", false)));
 642
 643         setupPersistedServerConfigPayload(persistedServerConfig, "member-1", name, "cars", "people");
 644         setupPersistedServerConfigPayload(persistedServerConfig, "member-2", name, "cars", "people");
 645         setupPersistedServerConfigPayload(persistedServerConfig, "member-3", name, "cars", "people");
 646
 647         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 648         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 649                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 650                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 651
 652         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 653                 moduleShardsConfig(moduleShardsConfig).build();
 654
 655         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 656                 moduleShardsConfig(moduleShardsConfig).build();
 657
 658         leaderNode1.configDataStore().waitTillReady();
 659         leaderNode1.operDataStore().waitTillReady();
 660         replicaNode3.configDataStore().waitTillReady();
 661         replicaNode3.operDataStore().waitTillReady();
 662         verifyVotingStates(leaderNode1.configDataStore(), "cars", new SimpleEntry<>("member-1", true),
 663                 new SimpleEntry<>("member-2", true), new SimpleEntry<>("member-3", false));
 664
 665         ClusterAdminRpcService service3 = new ClusterAdminRpcService(replicaNode3.configDataStore(),
 666                 replicaNode3.operDataStore());
 667
 668         RpcResult<FlipMemberVotingStatesForAllShardsOutput> rpcResult = service3.flipMemberVotingStatesForAllShards().
 669                 get(10, TimeUnit.SECONDS);
 670         FlipMemberVotingStatesForAllShardsOutput result = verifySuccessfulRpcResult(rpcResult);
 671         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 672                 successShardResult("people", DataStoreType.Config),
 673                 successShardResult("cars", DataStoreType.Operational),
 674                 successShardResult("people", DataStoreType.Operational));
 675
 676         verifyVotingStates(new DistributedDataStore[]{leaderNode1.configDataStore(), leaderNode1.operDataStore(),
 677                 replicaNode2.configDataStore(), replicaNode2.operDataStore(),
 678                 replicaNode3.configDataStore(), replicaNode3.operDataStore()},
 679                 new String[]{"cars", "people"},
 680                 new SimpleEntry<>("member-1", false), new SimpleEntry<>("member-2", false),
 681                 new SimpleEntry<>("member-3", true));
 682
 683         // Leadership should have transferred to member 3 since it is the only remaining voting member.
 684         verifyRaftState(leaderNode1.configDataStore(), "cars", raftState -> {
 685             assertNotNull("Expected non-null leader Id", raftState.getLeader());
 686             assertTrue("Expected leader member-1. Actual: " + raftState.getLeader(),
 687                     raftState.getLeader().contains("member-3"));
 688         });
 689
 690         verifyRaftState(leaderNode1.operDataStore(), "cars", raftState -> {
 691             assertNotNull("Expected non-null leader Id", raftState.getLeader());
 692             assertTrue("Expected leader member-1. Actual: " + raftState.getLeader(),
 693                     raftState.getLeader().contains("member-3"));
 694         });
 695
 696         // Flip the voting states back to the original states.
 697
 698         rpcResult = service3.flipMemberVotingStatesForAllShards(). get(10, TimeUnit.SECONDS);
 699         result = verifySuccessfulRpcResult(rpcResult);
 700         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 701                 successShardResult("people", DataStoreType.Config),
 702                 successShardResult("cars", DataStoreType.Operational),
 703                 successShardResult("people", DataStoreType.Operational));
 704
 705         verifyVotingStates(new DistributedDataStore[]{leaderNode1.configDataStore(), leaderNode1.operDataStore(),
 706                 replicaNode2.configDataStore(), replicaNode2.operDataStore(),
 707                 replicaNode3.configDataStore(), replicaNode3.operDataStore()},
 708                 new String[]{"cars", "people"},
 709                 new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", true),
 710                 new SimpleEntry<>("member-3", false));
 711
 712         // Leadership should have transferred to member 1 or 2.
 713         verifyRaftState(leaderNode1.configDataStore(), "cars", raftState -> {
 714             assertNotNull("Expected non-null leader Id", raftState.getLeader());
 715             assertTrue("Expected leader member-1 or member-2. Actual: " + raftState.getLeader(),
 716                     raftState.getLeader().contains("member-1") || raftState.getLeader().contains("member-2"));
 717         });
 718     }
 719
 720     @Test
 721     public void testFlipMemberVotingStatesWithNoInitialLeader() throws Exception {
 722         String name = "testFlipMemberVotingStatesWithNoInitialLeader";
 723
 724         // Members 1, 2, and 3 are initially started up as non-voting. Members 4, 5, and 6 are initially
 725         // non-voting and simulated as down by not starting them up.
 726         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
 727                 new ServerInfo("member-1", false), new ServerInfo("member-2", false),
 728                 new ServerInfo("member-3", false), new ServerInfo("member-4", true),
 729                 new ServerInfo("member-5", true), new ServerInfo("member-6", true)));
 730
 731         setupPersistedServerConfigPayload(persistedServerConfig, "member-1", name, "cars", "people");
 732         setupPersistedServerConfigPayload(persistedServerConfig, "member-2", name, "cars", "people");
 733         setupPersistedServerConfigPayload(persistedServerConfig, "member-3", name, "cars", "people");
 734
 735         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 736         MemberNode replicaNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 737                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 738                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 739
 740         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 741                 moduleShardsConfig(moduleShardsConfig).build();
 742
 743         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 744                 moduleShardsConfig(moduleShardsConfig).build();
 745
 746         // Initially there won't be a leader b/c all the up nodes are non-voting.
 747
 748         replicaNode1.waitForMembersUp("member-2", "member-3");
 749
 750         verifyVotingStates(replicaNode1.configDataStore(), "cars", new SimpleEntry<>("member-1", false),
 751                 new SimpleEntry<>("member-2", false), new SimpleEntry<>("member-3", false),
 752                 new SimpleEntry<>("member-4", true), new SimpleEntry<>("member-5", true),
 753                 new SimpleEntry<>("member-6", true));
 754
 755         verifyRaftState(replicaNode1.configDataStore(), "cars", raftState ->
 756             assertEquals("Expected raft state", RaftState.Follower.toString(), raftState.getRaftState()));
 757
 758         ClusterAdminRpcService service1 = new ClusterAdminRpcService(replicaNode1.configDataStore(),
 759                 replicaNode1.operDataStore());
 760
 761         RpcResult<FlipMemberVotingStatesForAllShardsOutput> rpcResult = service1.flipMemberVotingStatesForAllShards().
 762                 get(10, TimeUnit.SECONDS);
 763         FlipMemberVotingStatesForAllShardsOutput result = verifySuccessfulRpcResult(rpcResult);
 764         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 765                 successShardResult("people", DataStoreType.Config),
 766                 successShardResult("cars", DataStoreType.Operational),
 767                 successShardResult("people", DataStoreType.Operational));
 768
 769         verifyVotingStates(new DistributedDataStore[]{replicaNode1.configDataStore(), replicaNode1.operDataStore(),
 770                 replicaNode2.configDataStore(), replicaNode2.operDataStore(),
 771                 replicaNode3.configDataStore(), replicaNode3.operDataStore()},
 772                 new String[]{"cars", "people"},
 773                 new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", true),
 774                 new SimpleEntry<>("member-3", true), new SimpleEntry<>("member-4", false),
 775                 new SimpleEntry<>("member-5", false), new SimpleEntry<>("member-6", false));
 776
 777         // Since member 1 was changed to voting and there was no leader, it should've started and election
 778         // and become leader
 779         verifyRaftState(replicaNode1.configDataStore(), "cars", raftState -> {
 780             assertNotNull("Expected non-null leader Id", raftState.getLeader());
 781             assertTrue("Expected leader member-1. Actual: " + raftState.getLeader(),
 782                     raftState.getLeader().contains("member-1"));
 783         });
 784
 785         verifyRaftState(replicaNode1.operDataStore(), "cars", raftState -> {
 786             assertNotNull("Expected non-null leader Id", raftState.getLeader());
 787             assertTrue("Expected leader member-1. Actual: " + raftState.getLeader(),
 788                     raftState.getLeader().contains("member-1"));
 789         });
 790     }
 791
 792     @Test
 793     public void testFlipMemberVotingStatesWithVotingMembersDown() throws Exception {
 794         String name = "testFlipMemberVotingStatesWithVotingMembersDown";
 795
 796         // Members 4, 5, and 6 are initially non-voting and simulated as down by not starting them up.
 797         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
 798                 new ServerInfo("member-1", true), new ServerInfo("member-2", true),
 799                 new ServerInfo("member-3", true), new ServerInfo("member-4", false),
 800                 new ServerInfo("member-5", false), new ServerInfo("member-6", false)));
 801
 802         setupPersistedServerConfigPayload(persistedServerConfig, "member-1", name, "cars", "people");
 803         setupPersistedServerConfigPayload(persistedServerConfig, "member-2", name, "cars", "people");
 804         setupPersistedServerConfigPayload(persistedServerConfig, "member-3", name, "cars", "people");
 805
 806         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 807         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 808                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 809                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 810
 811         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 812                 moduleShardsConfig(moduleShardsConfig).build();
 813
 814         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 815                 moduleShardsConfig(moduleShardsConfig).build();
 816
 817         leaderNode1.configDataStore().waitTillReady();
 818         leaderNode1.operDataStore().waitTillReady();
 819         verifyVotingStates(leaderNode1.configDataStore(), "cars", new SimpleEntry<>("member-1", true),
 820                 new SimpleEntry<>("member-2", true), new SimpleEntry<>("member-3", true),
 821                 new SimpleEntry<>("member-4", false), new SimpleEntry<>("member-5", false),
 822                 new SimpleEntry<>("member-6", false));
 823
 824         ClusterAdminRpcService service1 = new ClusterAdminRpcService(leaderNode1.configDataStore(),
 825                 leaderNode1.operDataStore());
 826
 827         RpcResult<FlipMemberVotingStatesForAllShardsOutput> rpcResult = service1.flipMemberVotingStatesForAllShards().
 828                 get(10, TimeUnit.SECONDS);
 829         FlipMemberVotingStatesForAllShardsOutput result = verifySuccessfulRpcResult(rpcResult);
 830         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 831                 successShardResult("people", DataStoreType.Config),
 832                 successShardResult("cars", DataStoreType.Operational),
 833                 successShardResult("people", DataStoreType.Operational));
 834
 835         // Members 2 and 3 are now non-voting but should get replicated with the new new server config.
 836         verifyVotingStates(new DistributedDataStore[]{leaderNode1.configDataStore(), leaderNode1.operDataStore(),
 837                 replicaNode2.configDataStore(), replicaNode2.operDataStore(),
 838                 replicaNode3.configDataStore(), replicaNode3.operDataStore()},
 839                 new String[]{"cars", "people"},
 840                 new SimpleEntry<>("member-1", false), new SimpleEntry<>("member-2", false),
 841                 new SimpleEntry<>("member-3", false), new SimpleEntry<>("member-4", true),
 842                 new SimpleEntry<>("member-5", true), new SimpleEntry<>("member-6", true));
 843
 844         // The leader (member 1) was changed to non-voting but it shouldn't be able to step down as leader yet
 845         // b/c it can't get a majority consensus with all voting members down. So verify it remains the leader.
 846         verifyRaftState(leaderNode1.configDataStore(), "cars", raftState -> {
 847             assertNotNull("Expected non-null leader Id", raftState.getLeader());
 848             assertTrue("Expected leader member-1", raftState.getLeader().contains("member-1"));
 849         });
 850     }
 851
 852     private void setupPersistedServerConfigPayload(ServerConfigurationPayload serverConfig,
 853             String member, String datastoreTypeSuffix, String... shards) {
 854         String[] datastoreTypes = {"config_", "oper_"};
 855         for(String type: datastoreTypes) {
 856             for(String shard: shards) {
 857                 List<ServerInfo> newServerInfo = new ArrayList<>(serverConfig.getServerConfig().size());
 858                 for(ServerInfo info: serverConfig.getServerConfig()) {
 859                     newServerInfo.add(new ServerInfo(ShardIdentifier.create(shard, MemberName.forName(info.getId()),
 860                             type + datastoreTypeSuffix).toString(), info.isVoting()));
 861                 }
 862
 863                 String shardID = ShardIdentifier.create(shard, MemberName.forName(member),
 864                         type + datastoreTypeSuffix).toString();
 865                 InMemoryJournal.addEntry(shardID, 1, new UpdateElectionTerm(1, null));
 866                 InMemoryJournal.addEntry(shardID, 2, new ReplicatedLogImplEntry(0, 1,
 867                         new ServerConfigurationPayload(newServerInfo)));
 868             }
 869         }
 870     }
 871
 872     @SafeVarargs
 873     private static void verifyVotingStates(DistributedDataStore[] datastores, String[] shards,
 874             SimpleEntry<String, Boolean>... expStates) throws Exception {
 875         for(DistributedDataStore datastore: datastores) {
 876             for(String shard: shards) {
 877                 verifyVotingStates(datastore, shard, expStates);
 878             }
 879         }
 880     }
 881
 882     @SafeVarargs
 883     private static void verifyVotingStates(DistributedDataStore datastore, String shardName,
 884             SimpleEntry<String, Boolean>... expStates) throws Exception {
 885         String localMemberName = datastore.getActorContext().getCurrentMemberName().getName();
 886         Map<String, Boolean> expStateMap = new HashMap<>();
 887         for(Entry<String, Boolean> e: expStates) {
 888             expStateMap.put(ShardIdentifier.create(shardName, MemberName.forName(e.getKey()),
 889                     datastore.getActorContext().getDataStoreName()).toString(), e.getValue());
 890         }
 891
 892         verifyRaftState(datastore, shardName, raftState -> {
 893             String localPeerId = ShardIdentifier.create(shardName, MemberName.forName(localMemberName),
 894                     datastore.getActorContext().getDataStoreName()).toString();
 895             assertEquals("Voting state for " + localPeerId, expStateMap.get(localPeerId), raftState.isVoting());
 896             for(Entry<String, Boolean> e: raftState.getPeerVotingStates().entrySet()) {
 897                 assertEquals("Voting state for " + e.getKey(), expStateMap.get(e.getKey()), e.getValue());
 898             }
 899         });
 900     }
 901
 902     private static void verifyShardResults(List<ShardResult> shardResults, ShardResult... expShardResults) {
 903         Map<String, ShardResult> expResultsMap = new HashMap<>();
 904         for(ShardResult r: expShardResults) {
 905             expResultsMap.put(r.getShardName() + "-" + r.getDataStoreType(), r);
 906         }
 907
 908         for(ShardResult result: shardResults) {
 909             ShardResult exp = expResultsMap.remove(result.getShardName() + "-" + result.getDataStoreType());
 910             assertNotNull(String.format("Unexpected result for shard %s, type %s", result.getShardName(),
 911                     result.getDataStoreType()), exp);
 912             assertEquals("isSucceeded", exp.isSucceeded(), result.isSucceeded());
 913             if(exp.isSucceeded()) {
 914                 assertNull("Expected null error message", result.getErrorMessage());
 915             } else {
 916                 assertNotNull("Expected error message", result.getErrorMessage());
 917             }
 918         }
 919
 920         if(!expResultsMap.isEmpty()) {
 921             fail("Missing shard results for " + expResultsMap.keySet());
 922         }
 923     }
 924
 925     private static ShardResult successShardResult(String shardName, DataStoreType type) {
 926         return new ShardResultBuilder().setDataStoreType(type).setShardName(shardName).setSucceeded(true).build();
 927     }
 928
 929     private static ShardResult failedShardResult(String shardName, DataStoreType type) {
 930         return new ShardResultBuilder().setDataStoreType(type).setShardName(shardName).setSucceeded(false).build();
 931     }
 932 }