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.Sets;
  30 import java.io.File;
  31 import java.io.FileInputStream;
  32 import java.net.URI;
  33 import java.util.AbstractMap.SimpleEntry;
  34 import java.util.ArrayList;
  35 import java.util.Arrays;
  36 import java.util.HashMap;
  37 import java.util.HashSet;
  38 import java.util.List;
  39 import java.util.Map;
  40 import java.util.Map.Entry;
  41 import java.util.Set;
  42 import java.util.concurrent.TimeUnit;
  43 import org.apache.commons.lang3.SerializationUtils;
  44 import org.junit.After;
  45 import org.junit.Before;
  46 import org.junit.Test;
  47 import org.opendaylight.controller.cluster.access.concepts.MemberName;
  48 import org.opendaylight.controller.cluster.datastore.DatastoreContext;
  49 import org.opendaylight.controller.cluster.datastore.DistributedDataStore;
  50 import org.opendaylight.controller.cluster.datastore.MemberNode;
  51 import org.opendaylight.controller.cluster.datastore.MemberNode.RaftStateVerifier;
  52 import org.opendaylight.controller.cluster.datastore.Shard;
  53 import org.opendaylight.controller.cluster.datastore.config.ModuleShardConfiguration;
  54 import org.opendaylight.controller.cluster.datastore.identifiers.ShardIdentifier;
  55 import org.opendaylight.controller.cluster.datastore.messages.CreateShard;
  56 import org.opendaylight.controller.cluster.datastore.messages.DatastoreSnapshot;
  57 import org.opendaylight.controller.cluster.raft.RaftState;
  58 import org.opendaylight.controller.cluster.raft.ReplicatedLogImplEntry;
  59 import org.opendaylight.controller.cluster.raft.ServerConfigurationPayload;
  60 import org.opendaylight.controller.cluster.raft.ServerConfigurationPayload.ServerInfo;
  61 import org.opendaylight.controller.cluster.raft.base.messages.UpdateElectionTerm;
  62 import org.opendaylight.controller.cluster.raft.client.messages.OnDemandRaftState;
  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: memberNodes) {
 106             m.cleanup();
 107         }
 108     }
 109
 110     @Test
 111     public void testBackupDatastore() throws Exception {
 112         MemberNode node = MemberNode.builder(memberNodes).akkaConfig("Member1").
 113                 moduleShardsConfig("module-shards-member1.conf").
 114                 waitForShardLeader("cars", "people").testName("testBackupDatastore").build();
 115
 116         String fileName = "target/testBackupDatastore";
 117         new File(fileName).delete();
 118
 119         ClusterAdminRpcService service = new ClusterAdminRpcService(node.configDataStore(), node.operDataStore());
 120
 121         RpcResult<Void> rpcResult = service .backupDatastore(new BackupDatastoreInputBuilder().
 122                 setFilePath(fileName).build()).get(5, TimeUnit.SECONDS);
 123         verifySuccessfulRpcResult(rpcResult);
 124
 125         try(FileInputStream fis = new FileInputStream(fileName)) {
 126             List<DatastoreSnapshot> snapshots = SerializationUtils.deserialize(fis);
 127             assertEquals("DatastoreSnapshot size", 2, snapshots.size());
 128
 129             ImmutableMap<String, DatastoreSnapshot> map = ImmutableMap.of(snapshots.get(0).getType(), snapshots.get(0),
 130                     snapshots.get(1).getType(), snapshots.get(1));
 131             verifyDatastoreSnapshot(node.configDataStore().getActorContext().getDataStoreName(),
 132                     map.get(node.configDataStore().getActorContext().getDataStoreName()), "cars", "people");
 133         } finally {
 134             new File(fileName).delete();
 135         }
 136
 137         // Test failure by killing a shard.
 138
 139         node.configDataStore().getActorContext().getShardManager().tell(node.datastoreContextBuilder().
 140                 shardInitializationTimeout(200, TimeUnit.MILLISECONDS).build(), ActorRef.noSender());
 141
 142         ActorRef carsShardActor = node.configDataStore().getActorContext().findLocalShard("cars").get();
 143         node.kit().watch(carsShardActor);
 144         carsShardActor.tell(PoisonPill.getInstance(), ActorRef.noSender());
 145         node.kit().expectTerminated(carsShardActor);
 146
 147         rpcResult = service.backupDatastore(new BackupDatastoreInputBuilder().setFilePath(fileName).build()).
 148                 get(5, TimeUnit.SECONDS);
 149         assertEquals("isSuccessful", false, rpcResult.isSuccessful());
 150         assertEquals("getErrors", 1, rpcResult.getErrors().size());
 151     }
 152
 153     private static void verifyDatastoreSnapshot(String type, DatastoreSnapshot datastoreSnapshot, String... expShardNames) {
 154         assertNotNull("Missing DatastoreSnapshot for type " + type, datastoreSnapshot);
 155         Set<String> shardNames = new HashSet<>();
 156         for(DatastoreSnapshot.ShardSnapshot s: datastoreSnapshot.getShardSnapshots()) {
 157             shardNames.add(s.getName());
 158         }
 159
 160         assertEquals("DatastoreSnapshot shard names", Sets.newHashSet(expShardNames), shardNames);
 161     }
 162
 163     @Test
 164     public void testAddShardReplica() throws Exception {
 165         String name = "testAddShardReplica";
 166         String moduleShardsConfig = "module-shards-cars-member-1.conf";
 167         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 168                 moduleShardsConfig(moduleShardsConfig).waitForShardLeader("cars").build();
 169
 170         MemberNode newReplicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 171                 moduleShardsConfig(moduleShardsConfig).build();
 172
 173         leaderNode1.waitForMembersUp("member-2");
 174
 175         doAddShardReplica(newReplicaNode2, "cars", "member-1");
 176
 177         MemberNode newReplicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 178                 moduleShardsConfig(moduleShardsConfig).build();
 179
 180         leaderNode1.waitForMembersUp("member-3");
 181         newReplicaNode2.waitForMembersUp("member-3");
 182
 183         doAddShardReplica(newReplicaNode3, "cars", "member-1", "member-2");
 184
 185         verifyRaftPeersPresent(newReplicaNode2.configDataStore(), "cars", "member-1", "member-3");
 186         verifyRaftPeersPresent(newReplicaNode2.operDataStore(), "cars", "member-1", "member-3");
 187
 188         // Write data to member-2's config datastore and read/verify via member-3
 189         NormalizedNode<?, ?> configCarsNode = writeCarsNodeAndVerify(newReplicaNode2.configDataStore(),
 190                 newReplicaNode3.configDataStore());
 191
 192         // Write data to member-3's oper datastore and read/verify via member-2
 193         writeCarsNodeAndVerify(newReplicaNode3.operDataStore(), newReplicaNode2.operDataStore());
 194
 195         // Verify all data has been replicated. We expect 3 log entries and thus last applied index of 2 -
 196         // 2 ServerConfigurationPayload entries and the transaction payload entry.
 197
 198         RaftStateVerifier verifier = new RaftStateVerifier() {
 199             @Override
 200             public void verify(OnDemandRaftState raftState) {
 201                 assertEquals("Commit index", 2, raftState.getCommitIndex());
 202                 assertEquals("Last applied index", 2, raftState.getLastApplied());
 203             }
 204         };
 205
 206         verifyRaftState(leaderNode1.configDataStore(), "cars", verifier);
 207         verifyRaftState(leaderNode1.operDataStore(), "cars", verifier);
 208
 209         verifyRaftState(newReplicaNode2.configDataStore(), "cars", verifier);
 210         verifyRaftState(newReplicaNode2.operDataStore(), "cars", verifier);
 211
 212         verifyRaftState(newReplicaNode3.configDataStore(), "cars", verifier);
 213         verifyRaftState(newReplicaNode3.operDataStore(), "cars", verifier);
 214
 215         // Restart member-3 and verify the cars config shard is re-instated.
 216
 217         Cluster.get(leaderNode1.kit().getSystem()).down(Cluster.get(newReplicaNode3.kit().getSystem()).selfAddress());
 218         newReplicaNode3.cleanup();
 219
 220         newReplicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 221                 moduleShardsConfig(moduleShardsConfig).createOperDatastore(false).build();
 222
 223         verifyRaftState(newReplicaNode3.configDataStore(), "cars", verifier);
 224         readCarsNodeAndVerify(newReplicaNode3.configDataStore(), configCarsNode);
 225     }
 226
 227     @Test
 228     public void testAddShardReplicaFailures() throws Exception {
 229         String name = "testAddShardReplicaFailures";
 230         MemberNode memberNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name).
 231                 moduleShardsConfig("module-shards-cars-member-1.conf").build();
 232
 233         ClusterAdminRpcService service = new ClusterAdminRpcService(memberNode.configDataStore(),
 234                 memberNode.operDataStore());
 235
 236         RpcResult<Void> rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().
 237                 setDataStoreType(DataStoreType.Config).build()).get(10, TimeUnit.SECONDS);
 238         verifyFailedRpcResult(rpcResult);
 239
 240         rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().setShardName("cars").
 241                 build()).get(10, TimeUnit.SECONDS);
 242         verifyFailedRpcResult(rpcResult);
 243
 244         rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().setShardName("people").
 245                 setDataStoreType(DataStoreType.Config).build()).get(10, TimeUnit.SECONDS);
 246         verifyFailedRpcResult(rpcResult);
 247     }
 248
 249     private static NormalizedNode<?, ?> writeCarsNodeAndVerify(DistributedDataStore writeToStore,
 250             DistributedDataStore readFromStore) throws Exception {
 251         DOMStoreWriteTransaction writeTx = writeToStore.newWriteOnlyTransaction();
 252         NormalizedNode<?, ?> carsNode = CarsModel.create();
 253         writeTx.write(CarsModel.BASE_PATH, carsNode);
 254
 255         DOMStoreThreePhaseCommitCohort cohort = writeTx.ready();
 256         Boolean canCommit = cohort .canCommit().get(7, TimeUnit.SECONDS);
 257         assertEquals("canCommit", true, canCommit);
 258         cohort.preCommit().get(5, TimeUnit.SECONDS);
 259         cohort.commit().get(5, TimeUnit.SECONDS);
 260
 261         readCarsNodeAndVerify(readFromStore, carsNode);
 262         return carsNode;
 263     }
 264
 265     private static void readCarsNodeAndVerify(DistributedDataStore readFromStore,
 266             NormalizedNode<?, ?> expCarsNode) throws Exception {
 267         Optional<NormalizedNode<?, ?>> optional = readFromStore.newReadOnlyTransaction().
 268                 read(CarsModel.BASE_PATH).get(15, TimeUnit.SECONDS);
 269         assertEquals("isPresent", true, optional.isPresent());
 270         assertEquals("Data node", expCarsNode, optional.get());
 271     }
 272
 273     private static void doAddShardReplica(MemberNode memberNode, String shardName, String... peerMemberNames)
 274             throws Exception {
 275         memberNode.waitForMembersUp(peerMemberNames);
 276
 277         ClusterAdminRpcService service = new ClusterAdminRpcService(memberNode.configDataStore(),
 278                 memberNode.operDataStore());
 279
 280         RpcResult<Void> rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().setShardName(shardName).
 281                 setDataStoreType(DataStoreType.Config).build()).get(10, TimeUnit.SECONDS);
 282         verifySuccessfulRpcResult(rpcResult);
 283
 284         verifyRaftPeersPresent(memberNode.configDataStore(), shardName, peerMemberNames);
 285
 286         Optional<ActorRef> optional = memberNode.operDataStore().getActorContext().findLocalShard(shardName);
 287         assertEquals("Oper shard present", false, optional.isPresent());
 288
 289         rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().setShardName(shardName).
 290                 setDataStoreType(DataStoreType.Operational).build()).get(10, TimeUnit.SECONDS);
 291         verifySuccessfulRpcResult(rpcResult);
 292
 293         verifyRaftPeersPresent(memberNode.operDataStore(), shardName, peerMemberNames);
 294     }
 295
 296     private static <T> T verifySuccessfulRpcResult(RpcResult<T> rpcResult) {
 297         if(!rpcResult.isSuccessful()) {
 298             if(rpcResult.getErrors().size() > 0) {
 299                 RpcError error = Iterables.getFirst(rpcResult.getErrors(), null);
 300                 throw new AssertionError("Rpc failed with error: " + error, error.getCause());
 301             }
 302
 303             fail("Rpc failed with no error");
 304         }
 305
 306         return rpcResult.getResult();
 307     }
 308
 309     private static void verifyFailedRpcResult(RpcResult<Void> rpcResult) {
 310         assertEquals("RpcResult", false, rpcResult.isSuccessful());
 311         assertEquals("RpcResult errors size", 1, rpcResult.getErrors().size());
 312         RpcError error = Iterables.getFirst(rpcResult.getErrors(), null);
 313         assertNotNull("RpcResult error message null", error.getMessage());
 314     }
 315
 316     @Test
 317     public void testRemoveShardReplica() throws Exception {
 318         String name = "testRemoveShardReplicaLocal";
 319         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 320         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 321                 moduleShardsConfig(moduleShardsConfig).
 322                 datastoreContextBuilder(DatastoreContext.newBuilder().
 323                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 324
 325         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 326                 moduleShardsConfig(moduleShardsConfig).build();
 327
 328         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 329                 moduleShardsConfig(moduleShardsConfig).build();
 330
 331         leaderNode1.configDataStore().waitTillReady();
 332         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2", "member-3");
 333         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1", "member-3");
 334         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-1", "member-2");
 335
 336         // Invoke RPC service on member-3 to remove it's local shard
 337
 338         ClusterAdminRpcService service3 = new ClusterAdminRpcService(replicaNode3.configDataStore(),
 339                 replicaNode3.operDataStore());
 340
 341         RpcResult<Void> rpcResult = service3.removeShardReplica(new RemoveShardReplicaInputBuilder().
 342                 setShardName("cars").setMemberName("member-3").setDataStoreType(DataStoreType.Config).build()).
 343                         get(10, TimeUnit.SECONDS);
 344         verifySuccessfulRpcResult(rpcResult);
 345
 346         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2");
 347         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1");
 348         verifyNoShardPresent(replicaNode3.configDataStore(), "cars");
 349
 350         // Restart member-2 and verify member-3 isn't present.
 351
 352         Cluster.get(leaderNode1.kit().getSystem()).down(Cluster.get(replicaNode2.kit().getSystem()).selfAddress());
 353         replicaNode2.cleanup();
 354
 355         replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 356                 moduleShardsConfig(moduleShardsConfig).build();
 357
 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         replicaNode2.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", new RaftStateVerifier() {
 408             @Override
 409             public void verify(OnDemandRaftState raftState) {
 410                 assertThat("Leader Id", raftState.getLeader(), anyOf(containsString("member-2"),
 411                         containsString("member-3")));
 412             }
 413         });
 414
 415         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-3");
 416         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-2");
 417         verifyNoShardPresent(leaderNode1.configDataStore(), "cars");
 418     }
 419
 420     @Test
 421     public void testAddReplicasForAllShards() throws Exception {
 422         String name = "testAddReplicasForAllShards";
 423         String moduleShardsConfig = "module-shards-member1.conf";
 424         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 425                 moduleShardsConfig(moduleShardsConfig).waitForShardLeader("cars", "people").build();
 426
 427         ModuleShardConfiguration petsModuleConfig = new ModuleShardConfiguration(URI.create("pets-ns"), "pets-module",
 428                 "pets", null, Arrays.asList(MEMBER_1));
 429         leaderNode1.configDataStore().getActorContext().getShardManager().tell(
 430                 new CreateShard(petsModuleConfig, Shard.builder(), null), leaderNode1.kit().getRef());
 431         leaderNode1.kit().expectMsgClass(Success.class);
 432         leaderNode1.kit().waitUntilLeader(leaderNode1.configDataStore().getActorContext(), "pets");
 433
 434         MemberNode newReplicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 435                 moduleShardsConfig(moduleShardsConfig).build();
 436
 437         leaderNode1.waitForMembersUp("member-2");
 438         newReplicaNode2.waitForMembersUp("member-1");
 439
 440         newReplicaNode2.configDataStore().getActorContext().getShardManager().tell(
 441                 new CreateShard(petsModuleConfig, Shard.builder(), null), newReplicaNode2.kit().getRef());
 442         newReplicaNode2.kit().expectMsgClass(Success.class);
 443
 444         newReplicaNode2.operDataStore().getActorContext().getShardManager().tell(
 445                 new CreateShard(new ModuleShardConfiguration(URI.create("no-leader-ns"), "no-leader-module",
 446                         "no-leader", null, Arrays.asList(MEMBER_1)), Shard.builder(), null),
 447                                 newReplicaNode2.kit().getRef());
 448         newReplicaNode2.kit().expectMsgClass(Success.class);
 449
 450         ClusterAdminRpcService service = new ClusterAdminRpcService(newReplicaNode2.configDataStore(),
 451                 newReplicaNode2.operDataStore());
 452
 453         RpcResult<AddReplicasForAllShardsOutput> rpcResult = service.addReplicasForAllShards().get(10, TimeUnit.SECONDS);
 454         AddReplicasForAllShardsOutput result = verifySuccessfulRpcResult(rpcResult);
 455         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 456                 successShardResult("people", DataStoreType.Config),
 457                 successShardResult("pets", DataStoreType.Config),
 458                 successShardResult("cars", DataStoreType.Operational),
 459                 successShardResult("people", DataStoreType.Operational),
 460                 failedShardResult("no-leader", DataStoreType.Operational));
 461
 462         verifyRaftPeersPresent(newReplicaNode2.configDataStore(), "cars", "member-1");
 463         verifyRaftPeersPresent(newReplicaNode2.configDataStore(), "people", "member-1");
 464         verifyRaftPeersPresent(newReplicaNode2.configDataStore(), "pets", "member-1");
 465         verifyRaftPeersPresent(newReplicaNode2.operDataStore(), "cars", "member-1");
 466         verifyRaftPeersPresent(newReplicaNode2.operDataStore(), "people", "member-1");
 467     }
 468
 469     @Test
 470     public void testRemoveAllShardReplicas() throws Exception {
 471         String name = "testRemoveAllShardReplicas";
 472         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 473         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 474                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 475                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 476
 477         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 478                 moduleShardsConfig(moduleShardsConfig).build();
 479
 480         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 481                 moduleShardsConfig(moduleShardsConfig).build();
 482
 483         leaderNode1.configDataStore().waitTillReady();
 484         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2", "member-3");
 485         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1", "member-3");
 486         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-1", "member-2");
 487
 488         ModuleShardConfiguration petsModuleConfig = new ModuleShardConfiguration(URI.create("pets-ns"), "pets-module",
 489                 "pets", null, Arrays.asList(MEMBER_1, MEMBER_2, MEMBER_3));
 490         leaderNode1.configDataStore().getActorContext().getShardManager().tell(
 491                 new CreateShard(petsModuleConfig, Shard.builder(), null), leaderNode1.kit().getRef());
 492         leaderNode1.kit().expectMsgClass(Success.class);
 493
 494         replicaNode2.configDataStore().getActorContext().getShardManager().tell(
 495                 new CreateShard(petsModuleConfig, Shard.builder(), null), replicaNode2.kit().getRef());
 496         replicaNode2.kit().expectMsgClass(Success.class);
 497
 498         replicaNode3.configDataStore().getActorContext().getShardManager().tell(
 499                 new CreateShard(petsModuleConfig, Shard.builder(), null), replicaNode3.kit().getRef());
 500         replicaNode3.kit().expectMsgClass(Success.class);
 501
 502         verifyRaftPeersPresent(leaderNode1.configDataStore(), "pets", "member-2", "member-3");
 503         verifyRaftPeersPresent(replicaNode2.configDataStore(), "pets", "member-1", "member-3");
 504         verifyRaftPeersPresent(replicaNode3.configDataStore(), "pets", "member-1", "member-2");
 505
 506         ClusterAdminRpcService service3 = new ClusterAdminRpcService(replicaNode3.configDataStore(),
 507                 replicaNode3.operDataStore());
 508
 509         RpcResult<RemoveAllShardReplicasOutput> rpcResult = service3.removeAllShardReplicas(
 510                 new RemoveAllShardReplicasInputBuilder().setMemberName("member-3").build()).get(10, TimeUnit.SECONDS);
 511         RemoveAllShardReplicasOutput result = verifySuccessfulRpcResult(rpcResult);
 512         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 513                 successShardResult("people", DataStoreType.Config),
 514                 successShardResult("pets", DataStoreType.Config),
 515                 successShardResult("cars", DataStoreType.Operational),
 516                 successShardResult("people", DataStoreType.Operational));
 517
 518         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2");
 519         verifyRaftPeersPresent(leaderNode1.configDataStore(), "people", "member-2");
 520         verifyRaftPeersPresent(leaderNode1.configDataStore(), "pets", "member-2");
 521         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1");
 522         verifyRaftPeersPresent(replicaNode2.configDataStore(), "people", "member-1");
 523         verifyRaftPeersPresent(replicaNode2.configDataStore(), "pets", "member-1");
 524         verifyNoShardPresent(replicaNode3.configDataStore(), "cars");
 525         verifyNoShardPresent(replicaNode3.configDataStore(), "people");
 526         verifyNoShardPresent(replicaNode3.configDataStore(), "pets");
 527     }
 528
 529     @Test
 530     public void testChangeMemberVotingStatesForShard() throws Exception {
 531         String name = "testChangeMemberVotingStatusForShard";
 532         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 533         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 534                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 535                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 536
 537         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 538                 moduleShardsConfig(moduleShardsConfig).build();
 539
 540         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 541                 moduleShardsConfig(moduleShardsConfig).build();
 542
 543         leaderNode1.configDataStore().waitTillReady();
 544         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2", "member-3");
 545         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1", "member-3");
 546         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-1", "member-2");
 547
 548         // Invoke RPC service on member-3 to change voting status
 549
 550         ClusterAdminRpcService service3 = new ClusterAdminRpcService(replicaNode3.configDataStore(),
 551                 replicaNode3.operDataStore());
 552
 553         RpcResult<Void> rpcResult = service3.changeMemberVotingStatesForShard(
 554                 new ChangeMemberVotingStatesForShardInputBuilder().setShardName("cars").
 555                     setDataStoreType(DataStoreType.Config).setMemberVotingState(ImmutableList.of(
 556                         new MemberVotingStateBuilder().setMemberName("member-2").setVoting(false).build(),
 557                         new MemberVotingStateBuilder().setMemberName("member-3").setVoting(false).build())).build()).
 558                 get(10, TimeUnit.SECONDS);
 559         verifySuccessfulRpcResult(rpcResult);
 560
 561         verifyVotingStates(leaderNode1.configDataStore(), "cars", new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", false),
 562                 new SimpleEntry<>("member-3", false));
 563         verifyVotingStates(replicaNode2.configDataStore(), "cars", new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", false),
 564                 new SimpleEntry<>("member-3", false));
 565         verifyVotingStates(replicaNode3.configDataStore(), "cars", new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", false),
 566                 new SimpleEntry<>("member-3", false));
 567     }
 568
 569     @Test
 570     public void testChangeMemberVotingStatesForSingleNodeShard() throws Exception {
 571         String name = "testChangeMemberVotingStatesForSingleNodeShard";
 572         String moduleShardsConfig = "module-shards-member1.conf";
 573         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 574                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 575                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 576
 577         leaderNode.configDataStore().waitTillReady();
 578
 579         // Invoke RPC service on member-3 to change voting status
 580
 581         ClusterAdminRpcService service = new ClusterAdminRpcService(leaderNode.configDataStore(),
 582                 leaderNode.operDataStore());
 583
 584         RpcResult<Void> rpcResult = service.changeMemberVotingStatesForShard(
 585                 new ChangeMemberVotingStatesForShardInputBuilder().setShardName("cars").
 586                     setDataStoreType(DataStoreType.Config).setMemberVotingState(ImmutableList.of(
 587                         new MemberVotingStateBuilder().setMemberName("member-1").setVoting(false).build())).build()).
 588                 get(10, TimeUnit.SECONDS);
 589         verifyFailedRpcResult(rpcResult);
 590
 591         verifyVotingStates(leaderNode.configDataStore(), "cars", new SimpleEntry<>("member-1", true));
 592     }
 593
 594     @Test
 595     public void testChangeMemberVotingStatesForAllShards() throws Exception {
 596         String name = "testChangeMemberVotingStatesForAllShards";
 597         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 598         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 599                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 600                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 601
 602         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 603                 moduleShardsConfig(moduleShardsConfig).build();
 604
 605         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 606                 moduleShardsConfig(moduleShardsConfig).build();
 607
 608         leaderNode1.configDataStore().waitTillReady();
 609         leaderNode1.operDataStore().waitTillReady();
 610         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2", "member-3");
 611         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1", "member-3");
 612         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-1", "member-2");
 613
 614         // Invoke RPC service on member-3 to change voting status
 615
 616         ClusterAdminRpcService service3 = new ClusterAdminRpcService(replicaNode3.configDataStore(),
 617                 replicaNode3.operDataStore());
 618
 619         RpcResult<ChangeMemberVotingStatesForAllShardsOutput> rpcResult = service3.changeMemberVotingStatesForAllShards(
 620                 new ChangeMemberVotingStatesForAllShardsInputBuilder().setMemberVotingState(ImmutableList.of(
 621                         new MemberVotingStateBuilder().setMemberName("member-2").setVoting(false).build(),
 622                         new MemberVotingStateBuilder().setMemberName("member-3").setVoting(false).build())).build()).
 623                 get(10, TimeUnit.SECONDS);
 624         ChangeMemberVotingStatesForAllShardsOutput result = verifySuccessfulRpcResult(rpcResult);
 625         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 626                 successShardResult("people", DataStoreType.Config),
 627                 successShardResult("cars", DataStoreType.Operational),
 628                 successShardResult("people", DataStoreType.Operational));
 629
 630         verifyVotingStates(new DistributedDataStore[]{leaderNode1.configDataStore(), leaderNode1.operDataStore(),
 631                 replicaNode2.configDataStore(), replicaNode2.operDataStore(),
 632                 replicaNode3.configDataStore(), replicaNode3.operDataStore()},
 633                 new String[]{"cars", "people"}, new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", false),
 634                 new SimpleEntry<>("member-3", false));
 635     }
 636
 637     @Test
 638     public void testFlipMemberVotingStates() throws Exception {
 639         String name = "testFlipMemberVotingStates";
 640
 641         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
 642                 new ServerInfo("member-1", true), new ServerInfo("member-2", true),
 643                 new ServerInfo("member-3", false)));
 644
 645         setupPersistedServerConfigPayload(persistedServerConfig, "member-1", name, "cars", "people");
 646         setupPersistedServerConfigPayload(persistedServerConfig, "member-2", name, "cars", "people");
 647         setupPersistedServerConfigPayload(persistedServerConfig, "member-3", name, "cars", "people");
 648
 649         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 650         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 651                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 652                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 653
 654         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 655                 moduleShardsConfig(moduleShardsConfig).build();
 656
 657         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 658                 moduleShardsConfig(moduleShardsConfig).build();
 659
 660         leaderNode1.configDataStore().waitTillReady();
 661         leaderNode1.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 }