opendaylight/md-sal/sal-distributed-datastore/src/test/java/org/opendaylight/controller/cluster/datastore/entityownership/DistributedEntityOwnershipIntegrationTest.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.entityownership;
   9
  10 import static org.junit.Assert.assertEquals;
  11 import static org.junit.Assert.assertNull;
  12 import static org.junit.Assert.assertThat;
  13 import static org.junit.Assert.assertTrue;
  14 import static org.mockito.AdditionalMatchers.or;
  15 import static org.mockito.Mockito.doNothing;
  16 import static org.mockito.Mockito.never;
  17 import static org.mockito.Mockito.reset;
  18 import static org.mockito.Mockito.timeout;
  19 import static org.mockito.Mockito.verify;
  20 import static org.opendaylight.controller.cluster.datastore.MemberNode.verifyRaftState;
  21 import static org.opendaylight.controller.cluster.datastore.entityownership.AbstractEntityOwnershipTest.ownershipChange;
  22 import static org.opendaylight.controller.cluster.datastore.entityownership.DistributedEntityOwnershipService.ENTITY_OWNERSHIP_SHARD_NAME;
  23 import static org.opendaylight.controller.cluster.datastore.entityownership.EntityOwnersModel.CANDIDATE_NAME_NODE_ID;
  24 import static org.opendaylight.controller.cluster.datastore.entityownership.EntityOwnersModel.entityPath;
  25
  26 import akka.actor.ActorRef;
  27 import akka.actor.Status.Failure;
  28 import akka.actor.Status.Success;
  29 import akka.cluster.Cluster;
  30 import akka.pattern.Patterns;
  31 import akka.util.Timeout;
  32 import com.google.common.base.Stopwatch;
  33 import com.google.common.collect.ImmutableMap;
  34 import com.google.common.collect.Iterables;
  35 import com.google.common.collect.Lists;
  36 import com.google.common.util.concurrent.Uninterruptibles;
  37 import java.util.ArrayList;
  38 import java.util.Arrays;
  39 import java.util.Collection;
  40 import java.util.List;
  41 import java.util.Optional;
  42 import java.util.concurrent.TimeUnit;
  43 import org.junit.After;
  44 import org.junit.Before;
  45 import org.junit.Test;
  46 import org.mockito.ArgumentCaptor;
  47 import org.mockito.Mock;
  48 import org.mockito.Mockito;
  49 import org.mockito.MockitoAnnotations;
  50 import org.mockito.exceptions.base.MockitoException;
  51 import org.opendaylight.controller.cluster.datastore.AbstractDataStore;
  52 import org.opendaylight.controller.cluster.datastore.DatastoreContext;
  53 import org.opendaylight.controller.cluster.datastore.IntegrationTestKit;
  54 import org.opendaylight.controller.cluster.datastore.MemberNode;
  55 import org.opendaylight.controller.cluster.datastore.entityownership.selectionstrategy.EntityOwnerSelectionStrategyConfig;
  56 import org.opendaylight.controller.cluster.datastore.messages.AddShardReplica;
  57 import org.opendaylight.controller.cluster.datastore.messages.ChangeShardMembersVotingStatus;
  58 import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
  59 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  60 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  61 import org.opendaylight.controller.md.cluster.datastore.model.SchemaContextHelper;
  62 import org.opendaylight.mdsal.eos.common.api.EntityOwnershipState;
  63 import org.opendaylight.mdsal.eos.dom.api.DOMEntity;
  64 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipCandidateRegistration;
  65 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipChange;
  66 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipListener;
  67 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipService;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.clustering.entity.owners.rev150804.entity.owners.entity.type.entity.Candidate;
  69 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  70 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
  71 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  72 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  73 import scala.concurrent.Await;
  74 import scala.concurrent.Future;
  75 import scala.concurrent.duration.FiniteDuration;
  76
  77 /**
  78  * End-to-end integration tests for the entity ownership functionality.
  79  *
  80  * @author Thomas Pantelis
  81  */
  82 public class DistributedEntityOwnershipIntegrationTest {
  83     private static final String MODULE_SHARDS_CONFIG = "module-shards-default.conf";
  84     private static final String MODULE_SHARDS_5_NODE_CONFIG = "module-shards-default-5-node.conf";
  85     private static final String MODULE_SHARDS_MEMBER_1_CONFIG = "module-shards-default-member-1.conf";
  86     private static final String ENTITY_TYPE1 = "entityType1";
  87     private static final String ENTITY_TYPE2 = "entityType2";
  88     private static final DOMEntity ENTITY1 = new DOMEntity(ENTITY_TYPE1, "entity1");
  89     private static final DOMEntity ENTITY1_2 = new DOMEntity(ENTITY_TYPE2, "entity1");
  90     private static final DOMEntity ENTITY2 = new DOMEntity(ENTITY_TYPE1, "entity2");
  91     private static final DOMEntity ENTITY3 = new DOMEntity(ENTITY_TYPE1, "entity3");
  92     private static final DOMEntity ENTITY4 = new DOMEntity(ENTITY_TYPE1, "entity4");
  93     private static final SchemaContext SCHEMA_CONTEXT = SchemaContextHelper.entityOwners();
  94
  95     private final DatastoreContext.Builder leaderDatastoreContextBuilder =
  96             DatastoreContext.newBuilder().shardHeartbeatIntervalInMillis(100).shardElectionTimeoutFactor(5)
  97                     .shardIsolatedLeaderCheckIntervalInMillis(1000000);
  98
  99     private final DatastoreContext.Builder followerDatastoreContextBuilder =
 100             DatastoreContext.newBuilder().shardHeartbeatIntervalInMillis(100).shardElectionTimeoutFactor(10000);
 101
 102     private final List<MemberNode> memberNodes = new ArrayList<>();
 103
 104     @Mock
 105     private DOMEntityOwnershipListener leaderMockListener;
 106
 107     @Mock
 108     private DOMEntityOwnershipListener leaderMockListener2;
 109
 110     @Mock
 111     private DOMEntityOwnershipListener follower1MockListener;
 112
 113     @Mock
 114     private DOMEntityOwnershipListener follower2MockListener;
 115
 116     @Before
 117     public void setUp() {
 118         MockitoAnnotations.initMocks(this);
 119         InMemoryJournal.clear();
 120         InMemorySnapshotStore.clear();
 121     }
 122
 123     @After
 124     public void tearDown() {
 125         for (MemberNode m : Lists.reverse(memberNodes)) {
 126             m.cleanup();
 127         }
 128         memberNodes.clear();
 129     }
 130
 131     private static DistributedEntityOwnershipService newOwnershipService(final AbstractDataStore datastore) {
 132         return DistributedEntityOwnershipService.start(datastore.getActorContext(),
 133                 EntityOwnerSelectionStrategyConfig.newBuilder().build());
 134     }
 135
 136     @Test
 137     public void testFunctionalityWithThreeNodes() throws Exception {
 138         String name = "testFunctionalityWithThreeNodes";
 139         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name)
 140                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 141                 .datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 142
 143         MemberNode follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name)
 144                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 145                 .datastoreContextBuilder(followerDatastoreContextBuilder).build();
 146
 147         MemberNode follower2Node = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name)
 148                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 149                 .datastoreContextBuilder(followerDatastoreContextBuilder).build();
 150
 151         AbstractDataStore leaderDistributedDataStore = leaderNode.configDataStore();
 152
 153         leaderDistributedDataStore.waitTillReady();
 154         follower1Node.configDataStore().waitTillReady();
 155         follower2Node.configDataStore().waitTillReady();
 156
 157         final DOMEntityOwnershipService leaderEntityOwnershipService = newOwnershipService(leaderDistributedDataStore);
 158         final DOMEntityOwnershipService follower1EntityOwnershipService =
 159                 newOwnershipService(follower1Node.configDataStore());
 160         final DOMEntityOwnershipService follower2EntityOwnershipService =
 161                 newOwnershipService(follower2Node.configDataStore());
 162
 163         leaderNode.kit().waitUntilLeader(leaderNode.configDataStore().getActorContext(), ENTITY_OWNERSHIP_SHARD_NAME);
 164
 165         leaderEntityOwnershipService.registerListener(ENTITY_TYPE1, leaderMockListener);
 166         leaderEntityOwnershipService.registerListener(ENTITY_TYPE2, leaderMockListener2);
 167         follower1EntityOwnershipService.registerListener(ENTITY_TYPE1, follower1MockListener);
 168
 169         // Register leader candidate for entity1 and verify it becomes owner
 170
 171         leaderEntityOwnershipService.registerCandidate(ENTITY1);
 172         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1, false, true, true));
 173         verify(follower1MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1, false, false, true));
 174         reset(leaderMockListener, follower1MockListener);
 175
 176         verifyGetOwnershipState(leaderEntityOwnershipService, ENTITY1, EntityOwnershipState.IS_OWNER);
 177         verifyGetOwnershipState(follower1EntityOwnershipService, ENTITY1, EntityOwnershipState.OWNED_BY_OTHER);
 178
 179         // Register leader candidate for entity1_2 (same id, different type) and verify it becomes owner
 180
 181         leaderEntityOwnershipService.registerCandidate(ENTITY1_2);
 182         verify(leaderMockListener2, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1_2, false, true, true));
 183         Uninterruptibles.sleepUninterruptibly(300, TimeUnit.MILLISECONDS);
 184         verify(leaderMockListener, never()).ownershipChanged(ownershipChange(ENTITY1_2));
 185         reset(leaderMockListener2);
 186
 187         // Register follower1 candidate for entity1 and verify it gets added but doesn't become owner
 188
 189         follower1EntityOwnershipService.registerCandidate(ENTITY1);
 190         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-1", "member-2");
 191         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-1");
 192         verifyOwner(follower2Node.configDataStore(), ENTITY1, "member-1");
 193         Uninterruptibles.sleepUninterruptibly(300, TimeUnit.MILLISECONDS);
 194         verify(leaderMockListener, never()).ownershipChanged(ownershipChange(ENTITY1));
 195         verify(follower1MockListener, never()).ownershipChanged(ownershipChange(ENTITY1));
 196
 197         // Register follower1 candidate for entity2 and verify it becomes owner
 198
 199         final DOMEntityOwnershipCandidateRegistration follower1Entity2Reg =
 200                 follower1EntityOwnershipService.registerCandidate(ENTITY2);
 201         verify(follower1MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, false, true, true));
 202         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, false, false, true));
 203         verifyOwner(follower2Node.configDataStore(), ENTITY2, "member-2");
 204         reset(leaderMockListener, follower1MockListener);
 205
 206         // Register follower2 candidate for entity2 and verify it gets added but doesn't become owner
 207
 208         follower2EntityOwnershipService.registerListener(ENTITY_TYPE1, follower2MockListener);
 209         verify(follower2MockListener, timeout(5000).times(2)).ownershipChanged(or(
 210                 ownershipChange(ENTITY1, false, false, true), ownershipChange(ENTITY2, false, false, true)));
 211
 212         follower2EntityOwnershipService.registerCandidate(ENTITY2);
 213         verifyCandidates(leaderDistributedDataStore, ENTITY2, "member-2", "member-3");
 214         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-2");
 215
 216         // Unregister follower1 candidate for entity2 and verify follower2 becomes owner
 217
 218         follower1Entity2Reg.close();
 219         verifyCandidates(leaderDistributedDataStore, ENTITY2, "member-3");
 220         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-3");
 221         verify(follower1MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, true, false, true));
 222         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, false, false, true));
 223
 224         // Depending on timing, follower2MockListener could get ownershipChanged with "false, false, true" if
 225         // if the original ownership change with "member-2 is replicated to follower2 after the listener is
 226         // registered.
 227         Uninterruptibles.sleepUninterruptibly(500, TimeUnit.MILLISECONDS);
 228         verify(follower2MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, false, true, true));
 229
 230         // Register follower1 candidate for entity3 and verify it becomes owner
 231
 232         follower1EntityOwnershipService.registerCandidate(ENTITY3);
 233         verifyOwner(leaderDistributedDataStore, ENTITY3, "member-2");
 234         verify(follower1MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY3, false, true, true));
 235         verify(follower2MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY3, false, false, true));
 236         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY3, false, false, true));
 237
 238         // Register follower2 candidate for entity4 and verify it becomes owner
 239
 240         follower2EntityOwnershipService.registerCandidate(ENTITY4);
 241         verifyOwner(leaderDistributedDataStore, ENTITY4, "member-3");
 242         verify(follower2MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY4, false, true, true));
 243         verify(follower1MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY4, false, false, true));
 244         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY4, false, false, true));
 245         reset(follower1MockListener, follower2MockListener);
 246
 247         // Register follower1 candidate for entity4 and verify it gets added but doesn't become owner
 248
 249         follower1EntityOwnershipService.registerCandidate(ENTITY4);
 250         verifyCandidates(leaderDistributedDataStore, ENTITY4, "member-3", "member-2");
 251         verifyOwner(leaderDistributedDataStore, ENTITY4, "member-3");
 252
 253         // Shutdown follower2 and verify it's owned entities (entity 4) get re-assigned
 254
 255         reset(leaderMockListener, follower1MockListener);
 256         follower2Node.cleanup();
 257
 258         verify(follower1MockListener, timeout(15000)).ownershipChanged(ownershipChange(ENTITY4, false, true, true));
 259         verify(leaderMockListener, timeout(15000)).ownershipChanged(ownershipChange(ENTITY4, false, false, true));
 260
 261         // Register leader candidate for entity2 and verify it becomes owner
 262
 263         DOMEntityOwnershipCandidateRegistration leaderEntity2Reg =
 264                 leaderEntityOwnershipService.registerCandidate(ENTITY2);
 265         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-1");
 266         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, false, true, true));
 267
 268         // Unregister leader candidate for entity2 and verify the owner is cleared
 269
 270         leaderEntity2Reg.close();
 271         verifyOwner(leaderDistributedDataStore, ENTITY2, "");
 272         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, true, false, false));
 273         verify(follower1MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, false, false, false));
 274     }
 275
 276     @Test
 277     public void testLeaderEntityOwnersReassignedAfterShutdown() throws Exception {
 278         followerDatastoreContextBuilder.shardElectionTimeoutFactor(5)
 279                     .customRaftPolicyImplementation(DisableElectionsRaftPolicy.class.getName());
 280
 281         String name = "testLeaderEntityOwnersReassignedAfterShutdown";
 282         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name)
 283                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 284                 .datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 285
 286         MemberNode follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name)
 287                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 288                 .datastoreContextBuilder(followerDatastoreContextBuilder).build();
 289
 290         MemberNode follower2Node = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name)
 291                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 292                 .datastoreContextBuilder(followerDatastoreContextBuilder).build();
 293
 294         AbstractDataStore leaderDistributedDataStore = leaderNode.configDataStore();
 295
 296         leaderDistributedDataStore.waitTillReady();
 297         follower1Node.configDataStore().waitTillReady();
 298         follower2Node.configDataStore().waitTillReady();
 299
 300         follower1Node.waitForMembersUp("member-1", "member-3");
 301
 302         final DOMEntityOwnershipService leaderEntityOwnershipService = newOwnershipService(leaderDistributedDataStore);
 303         final DOMEntityOwnershipService follower1EntityOwnershipService =
 304                 newOwnershipService(follower1Node.configDataStore());
 305         final DOMEntityOwnershipService follower2EntityOwnershipService =
 306                 newOwnershipService(follower2Node.configDataStore());
 307
 308         leaderNode.kit().waitUntilLeader(leaderNode.configDataStore().getActorContext(), ENTITY_OWNERSHIP_SHARD_NAME);
 309
 310         // Register follower1 candidate for entity1 and verify it becomes owner
 311
 312         follower1EntityOwnershipService.registerCandidate(ENTITY1);
 313         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-2");
 314
 315         // Register leader candidate for entity1
 316
 317         leaderEntityOwnershipService.registerCandidate(ENTITY1);
 318         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-2", "member-1");
 319         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-2");
 320
 321         // Register leader candidate for entity2 and verify it becomes owner
 322
 323         leaderEntityOwnershipService.registerCandidate(ENTITY2);
 324         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-1");
 325
 326         // Register follower2 candidate for entity2
 327
 328         follower2EntityOwnershipService.registerCandidate(ENTITY2);
 329         verifyCandidates(leaderDistributedDataStore, ENTITY2, "member-1", "member-3");
 330         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-1");
 331
 332         // Re-enable elections on all remaining followers so one becomes the new leader
 333
 334         ActorRef follower1Shard = IntegrationTestKit.findLocalShard(follower1Node.configDataStore().getActorContext(),
 335                 ENTITY_OWNERSHIP_SHARD_NAME);
 336         follower1Shard.tell(DatastoreContext.newBuilderFrom(followerDatastoreContextBuilder.build())
 337                 .customRaftPolicyImplementation(null).build(), ActorRef.noSender());
 338
 339         ActorRef follower2Shard = IntegrationTestKit.findLocalShard(follower2Node.configDataStore().getActorContext(),
 340                 ENTITY_OWNERSHIP_SHARD_NAME);
 341         follower2Shard.tell(DatastoreContext.newBuilderFrom(followerDatastoreContextBuilder.build())
 342                 .customRaftPolicyImplementation(null).build(), ActorRef.noSender());
 343
 344         // Shutdown the leader and verify its removed from the candidate list
 345
 346         leaderNode.cleanup();
 347         follower1Node.waitForMemberDown("member-1");
 348         follower2Node.waitForMemberDown("member-1");
 349
 350         // Verify the prior leader's entity owners are re-assigned.
 351
 352         verifyCandidates(follower1Node.configDataStore(), ENTITY1, "member-2", "member-1");
 353         verifyCandidates(follower1Node.configDataStore(), ENTITY2, "member-1", "member-3");
 354         verifyOwner(follower1Node.configDataStore(), ENTITY1, "member-2");
 355         verifyOwner(follower1Node.configDataStore(), ENTITY2, "member-3");
 356     }
 357
 358     @Test
 359     public void testLeaderAndFollowerEntityOwnersReassignedAfterShutdown() throws Exception {
 360         followerDatastoreContextBuilder.shardElectionTimeoutFactor(5)
 361                 .customRaftPolicyImplementation(DisableElectionsRaftPolicy.class.getName());
 362
 363         String name = "testLeaderAndFollowerEntityOwnersReassignedAfterShutdown";
 364         final MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1")
 365                 .useAkkaArtery(false).testName(name)
 366                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(SCHEMA_CONTEXT)
 367                 .createOperDatastore(false).datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 368
 369         final MemberNode follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2")
 370                 .useAkkaArtery(false).testName(name)
 371                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(SCHEMA_CONTEXT)
 372                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 373
 374         final MemberNode follower2Node = MemberNode.builder(memberNodes).akkaConfig("Member3")
 375                 .useAkkaArtery(false).testName(name)
 376                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(SCHEMA_CONTEXT)
 377                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 378
 379         final MemberNode follower3Node = MemberNode.builder(memberNodes).akkaConfig("Member4")
 380                 .useAkkaArtery(false).testName(name)
 381                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(SCHEMA_CONTEXT)
 382                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 383
 384         final MemberNode follower4Node = MemberNode.builder(memberNodes).akkaConfig("Member5")
 385                 .useAkkaArtery(false).testName(name)
 386                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(SCHEMA_CONTEXT)
 387                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 388
 389         AbstractDataStore leaderDistributedDataStore = leaderNode.configDataStore();
 390
 391         leaderDistributedDataStore.waitTillReady();
 392         follower1Node.configDataStore().waitTillReady();
 393         follower2Node.configDataStore().waitTillReady();
 394         follower3Node.configDataStore().waitTillReady();
 395         follower4Node.configDataStore().waitTillReady();
 396
 397         leaderNode.waitForMembersUp("member-2", "member-3", "member-4", "member-5");
 398         follower1Node.waitForMembersUp("member-1", "member-3", "member-4", "member-5");
 399
 400         final DOMEntityOwnershipService leaderEntityOwnershipService = newOwnershipService(leaderDistributedDataStore);
 401         final DOMEntityOwnershipService follower1EntityOwnershipService =
 402                 newOwnershipService(follower1Node.configDataStore());
 403         final DOMEntityOwnershipService follower2EntityOwnershipService =
 404                 newOwnershipService(follower2Node.configDataStore());
 405         final DOMEntityOwnershipService follower3EntityOwnershipService =
 406                 newOwnershipService(follower3Node.configDataStore());
 407         newOwnershipService(follower4Node.configDataStore());
 408
 409         leaderNode.kit().waitUntilLeader(leaderNode.configDataStore().getActorContext(), ENTITY_OWNERSHIP_SHARD_NAME);
 410
 411         // Register follower1 candidate for entity1 and verify it becomes owner
 412
 413         follower1EntityOwnershipService.registerCandidate(ENTITY1);
 414         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-2");
 415
 416         // Register leader candidate for entity1
 417
 418         leaderEntityOwnershipService.registerCandidate(ENTITY1);
 419         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-2", "member-1");
 420         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-2");
 421
 422         // Register leader candidate for entity2 and verify it becomes owner
 423
 424         leaderEntityOwnershipService.registerCandidate(ENTITY2);
 425         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-1");
 426
 427         // Register follower2 candidate for entity2
 428
 429         follower2EntityOwnershipService.registerCandidate(ENTITY2);
 430         verifyCandidates(leaderDistributedDataStore, ENTITY2, "member-1", "member-3");
 431         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-1");
 432
 433         // Register follower3 as a candidate for entity2 as well
 434
 435         follower3EntityOwnershipService.registerCandidate(ENTITY2);
 436         verifyCandidates(leaderDistributedDataStore, ENTITY2, "member-1", "member-3", "member-4");
 437         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-1");
 438
 439         // Re-enable elections on all remaining followers so one becomes the new leader
 440
 441         ActorRef follower1Shard = IntegrationTestKit.findLocalShard(follower1Node.configDataStore().getActorContext(),
 442                 ENTITY_OWNERSHIP_SHARD_NAME);
 443         follower1Shard.tell(DatastoreContext.newBuilderFrom(followerDatastoreContextBuilder.build())
 444                 .customRaftPolicyImplementation(null).build(), ActorRef.noSender());
 445
 446         ActorRef follower2Shard = IntegrationTestKit.findLocalShard(follower2Node.configDataStore().getActorContext(),
 447                 ENTITY_OWNERSHIP_SHARD_NAME);
 448         follower2Shard.tell(DatastoreContext.newBuilderFrom(followerDatastoreContextBuilder.build())
 449                 .customRaftPolicyImplementation(null).build(), ActorRef.noSender());
 450
 451         ActorRef follower4Shard = IntegrationTestKit.findLocalShard(follower4Node.configDataStore().getActorContext(),
 452                 ENTITY_OWNERSHIP_SHARD_NAME);
 453         follower4Shard.tell(DatastoreContext.newBuilderFrom(followerDatastoreContextBuilder.build())
 454                 .customRaftPolicyImplementation(null).build(), ActorRef.noSender());
 455
 456         // Shutdown the leader and follower3
 457
 458         leaderNode.cleanup();
 459         follower3Node.cleanup();
 460
 461         follower1Node.waitForMemberDown("member-1");
 462         follower1Node.waitForMemberDown("member-4");
 463         follower2Node.waitForMemberDown("member-1");
 464         follower2Node.waitForMemberDown("member-4");
 465         follower4Node.waitForMemberDown("member-1");
 466         follower4Node.waitForMemberDown("member-4");
 467
 468         // Verify the prior leader's and follower3 entity owners are re-assigned.
 469
 470         verifyCandidates(follower1Node.configDataStore(), ENTITY1, "member-2", "member-1");
 471         verifyCandidates(follower1Node.configDataStore(), ENTITY2, "member-1", "member-3", "member-4");
 472         verifyOwner(follower1Node.configDataStore(), ENTITY1, "member-2");
 473         verifyOwner(follower1Node.configDataStore(), ENTITY2, "member-3");
 474     }
 475
 476     /**
 477      * Reproduces bug <a href="https://bugs.opendaylight.org/show_bug.cgi?id=4554">4554</a>.
 478      */
 479     @Test
 480     public void testCloseCandidateRegistrationInQuickSuccession() throws Exception {
 481         String name = "testCloseCandidateRegistrationInQuickSuccession";
 482         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name)
 483                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 484                 .datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 485
 486         MemberNode follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name)
 487                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 488                 .datastoreContextBuilder(followerDatastoreContextBuilder).build();
 489
 490         MemberNode follower2Node = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name)
 491                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 492                 .datastoreContextBuilder(followerDatastoreContextBuilder).build();
 493
 494         AbstractDataStore leaderDistributedDataStore = leaderNode.configDataStore();
 495
 496         leaderDistributedDataStore.waitTillReady();
 497         follower1Node.configDataStore().waitTillReady();
 498         follower2Node.configDataStore().waitTillReady();
 499
 500         final DOMEntityOwnershipService leaderEntityOwnershipService = newOwnershipService(leaderDistributedDataStore);
 501         final DOMEntityOwnershipService follower1EntityOwnershipService =
 502                 newOwnershipService(follower1Node.configDataStore());
 503         final DOMEntityOwnershipService follower2EntityOwnershipService =
 504                 newOwnershipService(follower2Node.configDataStore());
 505
 506         leaderNode.kit().waitUntilLeader(leaderNode.configDataStore().getActorContext(), ENTITY_OWNERSHIP_SHARD_NAME);
 507
 508         leaderEntityOwnershipService.registerListener(ENTITY_TYPE1, leaderMockListener);
 509         follower1EntityOwnershipService.registerListener(ENTITY_TYPE1, follower1MockListener);
 510         follower2EntityOwnershipService.registerListener(ENTITY_TYPE1, follower2MockListener);
 511
 512         final DOMEntityOwnershipCandidateRegistration candidate1 =
 513                 leaderEntityOwnershipService.registerCandidate(ENTITY1);
 514         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1, false, true, true));
 515
 516         final DOMEntityOwnershipCandidateRegistration candidate2 =
 517                 follower1EntityOwnershipService.registerCandidate(ENTITY1);
 518         verify(follower1MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1, false, false, true));
 519
 520         final DOMEntityOwnershipCandidateRegistration candidate3 =
 521                 follower2EntityOwnershipService.registerCandidate(ENTITY1);
 522         verify(follower2MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1, false, false, true));
 523
 524         Mockito.reset(leaderMockListener, follower1MockListener, follower2MockListener);
 525
 526         ArgumentCaptor<DOMEntityOwnershipChange> leaderChangeCaptor =
 527                 ArgumentCaptor.forClass(DOMEntityOwnershipChange.class);
 528         ArgumentCaptor<DOMEntityOwnershipChange> follower1ChangeCaptor =
 529                 ArgumentCaptor.forClass(DOMEntityOwnershipChange.class);
 530         ArgumentCaptor<DOMEntityOwnershipChange> follower2ChangeCaptor =
 531                 ArgumentCaptor.forClass(DOMEntityOwnershipChange.class);
 532         doNothing().when(leaderMockListener).ownershipChanged(leaderChangeCaptor.capture());
 533         doNothing().when(follower1MockListener).ownershipChanged(follower1ChangeCaptor.capture());
 534         doNothing().when(follower2MockListener).ownershipChanged(follower2ChangeCaptor.capture());
 535
 536         candidate1.close();
 537         candidate2.close();
 538         candidate3.close();
 539
 540         boolean passed = false;
 541         for (int i = 0; i < 100; i++) {
 542             Uninterruptibles.sleepUninterruptibly(50, TimeUnit.MILLISECONDS);
 543             final Optional<EntityOwnershipState> leaderState = leaderEntityOwnershipService.getOwnershipState(ENTITY1);
 544             final Optional<EntityOwnershipState> follower1State =
 545                     follower1EntityOwnershipService.getOwnershipState(ENTITY1);
 546             final Optional<EntityOwnershipState> follower2State =
 547                     follower2EntityOwnershipService.getOwnershipState(ENTITY1);
 548             final Optional<DOMEntityOwnershipChange> leaderChange = getValueSafely(leaderChangeCaptor);
 549             final Optional<DOMEntityOwnershipChange> follower1Change = getValueSafely(follower1ChangeCaptor);
 550             final Optional<DOMEntityOwnershipChange> follower2Change = getValueSafely(follower2ChangeCaptor);
 551             if (!leaderState.isPresent() || leaderState.get() == EntityOwnershipState.NO_OWNER
 552                     && follower1State.isPresent() && follower1State.get() == EntityOwnershipState.NO_OWNER
 553                     && follower2State.isPresent() && follower2State.get() == EntityOwnershipState.NO_OWNER
 554                     && leaderChange.isPresent() && !leaderChange.get().getState().hasOwner()
 555                     && follower1Change.isPresent() && !follower1Change.get().getState().hasOwner()
 556                     && follower2Change.isPresent() && !follower2Change.get().getState().hasOwner()) {
 557                 passed = true;
 558                 break;
 559             }
 560         }
 561
 562         assertTrue("No ownership change message was sent with hasOwner=false", passed);
 563     }
 564
 565     private static Optional<DOMEntityOwnershipChange> getValueSafely(ArgumentCaptor<DOMEntityOwnershipChange> captor) {
 566         try {
 567             return Optional.ofNullable(captor.getValue());
 568         } catch (MockitoException e) {
 569             // No value was captured
 570             return Optional.empty();
 571         }
 572     }
 573
 574     /**
 575      * Tests bootstrapping the entity-ownership shard when there's no shards initially configured for local
 576      * member. The entity-ownership shard is initially created as inactive (ie remains a follower), requiring
 577      * an AddShardReplica request to join it to an existing leader.
 578      */
 579     @Test
 580     public void testEntityOwnershipShardBootstrapping() throws Exception {
 581         String name = "testEntityOwnershipShardBootstrapping";
 582         String moduleShardsConfig = MODULE_SHARDS_MEMBER_1_CONFIG;
 583         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name)
 584                 .moduleShardsConfig(moduleShardsConfig).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 585                 .datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 586
 587         AbstractDataStore leaderDistributedDataStore = leaderNode.configDataStore();
 588         final DOMEntityOwnershipService leaderEntityOwnershipService = newOwnershipService(leaderDistributedDataStore);
 589
 590         leaderNode.kit().waitUntilLeader(leaderNode.configDataStore().getActorContext(), ENTITY_OWNERSHIP_SHARD_NAME);
 591
 592         MemberNode follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name)
 593                 .moduleShardsConfig(moduleShardsConfig).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 594                 .datastoreContextBuilder(followerDatastoreContextBuilder).build();
 595
 596         AbstractDataStore follower1DistributedDataStore = follower1Node.configDataStore();
 597         follower1DistributedDataStore.waitTillReady();
 598
 599         leaderNode.waitForMembersUp("member-2");
 600         follower1Node.waitForMembersUp("member-1");
 601
 602         DOMEntityOwnershipService follower1EntityOwnershipService = newOwnershipService(follower1DistributedDataStore);
 603
 604         leaderEntityOwnershipService.registerListener(ENTITY_TYPE1, leaderMockListener);
 605
 606         // Register a candidate for follower1 - should get queued since follower1 has no leader
 607         final DOMEntityOwnershipCandidateRegistration candidateReg =
 608                 follower1EntityOwnershipService.registerCandidate(ENTITY1);
 609         Uninterruptibles.sleepUninterruptibly(300, TimeUnit.MILLISECONDS);
 610         verify(leaderMockListener, never()).ownershipChanged(ownershipChange(ENTITY1));
 611
 612         // Add replica in follower1
 613         AddShardReplica addReplica = new AddShardReplica(ENTITY_OWNERSHIP_SHARD_NAME);
 614         follower1DistributedDataStore.getActorContext().getShardManager().tell(addReplica,
 615                 follower1Node.kit().getRef());
 616         Object reply = follower1Node.kit().expectMsgAnyClassOf(follower1Node.kit().duration("5 sec"),
 617                 Success.class, Failure.class);
 618         if (reply instanceof Failure) {
 619             throw new AssertionError("AddShardReplica failed", ((Failure)reply).cause());
 620         }
 621
 622         // The queued candidate registration should proceed
 623         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1, false, false, true));
 624         reset(leaderMockListener);
 625
 626         candidateReg.close();
 627         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1, false, false, false));
 628         reset(leaderMockListener);
 629
 630         // Restart follower1 and verify the entity ownership shard is re-instated by registering.
 631         Cluster.get(leaderNode.kit().getSystem()).down(Cluster.get(follower1Node.kit().getSystem()).selfAddress());
 632         follower1Node.cleanup();
 633
 634         follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name)
 635                 .moduleShardsConfig(moduleShardsConfig).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 636                 .datastoreContextBuilder(followerDatastoreContextBuilder).build();
 637         follower1EntityOwnershipService = newOwnershipService(follower1Node.configDataStore());
 638
 639         follower1EntityOwnershipService.registerCandidate(ENTITY1);
 640         verify(leaderMockListener, timeout(20000)).ownershipChanged(ownershipChange(ENTITY1, false, false, true));
 641
 642         verifyRaftState(follower1Node.configDataStore(), ENTITY_OWNERSHIP_SHARD_NAME, raftState -> {
 643             assertNull("Custom RaftPolicy class name", raftState.getCustomRaftPolicyClassName());
 644             assertEquals("Peer count", 1, raftState.getPeerAddresses().keySet().size());
 645             assertThat("Peer Id", Iterables.<String>getLast(raftState.getPeerAddresses().keySet()),
 646                     org.hamcrest.CoreMatchers.containsString("member-1"));
 647         });
 648     }
 649
 650     @Test
 651     public void testOwnerSelectedOnRapidUnregisteringAndRegisteringOfCandidates() throws Exception {
 652         String name = "testOwnerSelectedOnRapidUnregisteringAndRegisteringOfCandidates";
 653         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name)
 654                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 655                 .datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 656
 657         MemberNode follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name)
 658                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 659                 .datastoreContextBuilder(followerDatastoreContextBuilder).build();
 660
 661         MemberNode follower2Node = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name)
 662                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 663                 .datastoreContextBuilder(followerDatastoreContextBuilder).build();
 664
 665         AbstractDataStore leaderDistributedDataStore = leaderNode.configDataStore();
 666
 667         leaderDistributedDataStore.waitTillReady();
 668         follower1Node.configDataStore().waitTillReady();
 669         follower2Node.configDataStore().waitTillReady();
 670
 671         final DOMEntityOwnershipService leaderEntityOwnershipService = newOwnershipService(leaderDistributedDataStore);
 672         final DOMEntityOwnershipService follower1EntityOwnershipService =
 673                 newOwnershipService(follower1Node.configDataStore());
 674         newOwnershipService(follower2Node.configDataStore());
 675
 676         leaderNode.kit().waitUntilLeader(leaderNode.configDataStore().getActorContext(), ENTITY_OWNERSHIP_SHARD_NAME);
 677
 678         // Register leader candidate for entity1 and verify it becomes owner
 679
 680         DOMEntityOwnershipCandidateRegistration leaderEntity1Reg =
 681                 leaderEntityOwnershipService.registerCandidate(ENTITY1);
 682
 683         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-1");
 684         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-1");
 685
 686         leaderEntity1Reg.close();
 687         follower1EntityOwnershipService.registerCandidate(ENTITY1);
 688
 689         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-2");
 690         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-2");
 691     }
 692
 693     @Test
 694     public void testOwnerSelectedOnRapidRegisteringAndUnregisteringOfCandidates() throws Exception {
 695         String name = "testOwnerSelectedOnRapidRegisteringAndUnregisteringOfCandidates";
 696         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name)
 697                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 698                 .datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 699
 700         MemberNode follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name)
 701                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 702                 .datastoreContextBuilder(followerDatastoreContextBuilder).build();
 703
 704         MemberNode follower2Node = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name)
 705                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(SCHEMA_CONTEXT).createOperDatastore(false)
 706                 .datastoreContextBuilder(followerDatastoreContextBuilder).build();
 707
 708         AbstractDataStore leaderDistributedDataStore = leaderNode.configDataStore();
 709
 710         leaderDistributedDataStore.waitTillReady();
 711         follower1Node.configDataStore().waitTillReady();
 712         follower2Node.configDataStore().waitTillReady();
 713
 714         final DOMEntityOwnershipService leaderEntityOwnershipService = newOwnershipService(leaderDistributedDataStore);
 715         final DOMEntityOwnershipService follower1EntityOwnershipService =
 716                 newOwnershipService(follower1Node.configDataStore());
 717         newOwnershipService(follower2Node.configDataStore());
 718
 719         leaderNode.kit().waitUntilLeader(leaderNode.configDataStore().getActorContext(), ENTITY_OWNERSHIP_SHARD_NAME);
 720
 721         // Register leader candidate for entity1 and verify it becomes owner
 722
 723         final DOMEntityOwnershipCandidateRegistration leaderEntity1Reg =
 724                 leaderEntityOwnershipService.registerCandidate(ENTITY1);
 725
 726         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-1");
 727         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-1");
 728
 729         follower1EntityOwnershipService.registerCandidate(ENTITY1);
 730         leaderEntity1Reg.close();
 731
 732         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-2");
 733         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-2");
 734     }
 735
 736     @Test
 737     public void testEntityOwnershipWithNonVotingMembers() throws Exception {
 738         followerDatastoreContextBuilder.shardElectionTimeoutFactor(5)
 739                 .customRaftPolicyImplementation(DisableElectionsRaftPolicy.class.getName());
 740
 741         String name = "testEntityOwnershipWithNonVotingMembers";
 742         final MemberNode member1LeaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1")
 743                 .useAkkaArtery(false).testName(name)
 744                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(SCHEMA_CONTEXT)
 745                 .createOperDatastore(false).datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 746
 747         final MemberNode member2FollowerNode = MemberNode.builder(memberNodes).akkaConfig("Member2")
 748                 .useAkkaArtery(false).testName(name)
 749                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(SCHEMA_CONTEXT)
 750                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 751
 752         final MemberNode member3FollowerNode = MemberNode.builder(memberNodes).akkaConfig("Member3")
 753                 .useAkkaArtery(false).testName(name)
 754                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(SCHEMA_CONTEXT)
 755                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 756
 757         final MemberNode member4FollowerNode = MemberNode.builder(memberNodes).akkaConfig("Member4")
 758                 .useAkkaArtery(false).testName(name)
 759                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(SCHEMA_CONTEXT)
 760                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 761
 762         final MemberNode member5FollowerNode = MemberNode.builder(memberNodes).akkaConfig("Member5")
 763                 .useAkkaArtery(false).testName(name)
 764                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(SCHEMA_CONTEXT)
 765                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 766
 767         AbstractDataStore leaderDistributedDataStore = member1LeaderNode.configDataStore();
 768
 769         leaderDistributedDataStore.waitTillReady();
 770         member2FollowerNode.configDataStore().waitTillReady();
 771         member3FollowerNode.configDataStore().waitTillReady();
 772         member4FollowerNode.configDataStore().waitTillReady();
 773         member5FollowerNode.configDataStore().waitTillReady();
 774
 775         member1LeaderNode.waitForMembersUp("member-2", "member-3", "member-4", "member-5");
 776
 777         final DOMEntityOwnershipService member3EntityOwnershipService =
 778                 newOwnershipService(member3FollowerNode.configDataStore());
 779         final DOMEntityOwnershipService member4EntityOwnershipService =
 780                 newOwnershipService(member4FollowerNode.configDataStore());
 781         final DOMEntityOwnershipService member5EntityOwnershipService =
 782                 newOwnershipService(member5FollowerNode.configDataStore());
 783
 784         newOwnershipService(member1LeaderNode.configDataStore());
 785         member1LeaderNode.kit().waitUntilLeader(member1LeaderNode.configDataStore().getActorContext(),
 786                 ENTITY_OWNERSHIP_SHARD_NAME);
 787
 788         // Make member4 and member5 non-voting
 789
 790         Future<Object> future = Patterns.ask(leaderDistributedDataStore.getActorContext().getShardManager(),
 791                 new ChangeShardMembersVotingStatus(ENTITY_OWNERSHIP_SHARD_NAME,
 792                         ImmutableMap.of("member-4", Boolean.FALSE, "member-5", Boolean.FALSE)),
 793                 new Timeout(10, TimeUnit.SECONDS));
 794         Object response = Await.result(future, FiniteDuration.apply(10, TimeUnit.SECONDS));
 795         if (response instanceof Throwable) {
 796             throw new AssertionError("ChangeShardMembersVotingStatus failed", (Throwable)response);
 797         }
 798
 799         assertNull("Expected null Success response. Actual " + response, response);
 800
 801         // Register member4 candidate for entity1 - it should not become owner since it's non-voting
 802
 803         member4EntityOwnershipService.registerCandidate(ENTITY1);
 804         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-4");
 805
 806         // Register member5 candidate for entity2 - it should not become owner since it's non-voting
 807
 808         member5EntityOwnershipService.registerCandidate(ENTITY2);
 809         verifyCandidates(leaderDistributedDataStore, ENTITY2, "member-5");
 810
 811         Uninterruptibles.sleepUninterruptibly(500, TimeUnit.MILLISECONDS);
 812         verifyOwner(leaderDistributedDataStore, ENTITY1, "");
 813         verifyOwner(leaderDistributedDataStore, ENTITY2, "");
 814
 815         // Register member3 candidate for entity1 - it should become owner since it's voting
 816
 817         member3EntityOwnershipService.registerCandidate(ENTITY1);
 818         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-4", "member-3");
 819         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-3");
 820
 821         // Switch member4 and member5 back to voting and member3 non-voting. This should result in member4 and member5
 822         // to become entity owners.
 823
 824         future = Patterns.ask(leaderDistributedDataStore.getActorContext().getShardManager(),
 825                 new ChangeShardMembersVotingStatus(ENTITY_OWNERSHIP_SHARD_NAME,
 826                         ImmutableMap.of("member-3", Boolean.FALSE, "member-4", Boolean.TRUE, "member-5", Boolean.TRUE)),
 827                 new Timeout(10, TimeUnit.SECONDS));
 828         response = Await.result(future, FiniteDuration.apply(10, TimeUnit.SECONDS));
 829         if (response instanceof Throwable) {
 830             throw new AssertionError("ChangeShardMembersVotingStatus failed", (Throwable)response);
 831         }
 832
 833         assertNull("Expected null Success response. Actual " + response, response);
 834
 835         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-4");
 836         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-5");
 837     }
 838
 839     private static void verifyGetOwnershipState(final DOMEntityOwnershipService service, final DOMEntity entity,
 840             final EntityOwnershipState expState) {
 841         Optional<EntityOwnershipState> state = service.getOwnershipState(entity);
 842         assertTrue("getOwnershipState present", state.isPresent());
 843         assertEquals("EntityOwnershipState", expState, state.get());
 844     }
 845
 846     private static void verifyCandidates(final AbstractDataStore dataStore, final DOMEntity entity,
 847             final String... expCandidates) throws Exception {
 848         AssertionError lastError = null;
 849         Stopwatch sw = Stopwatch.createStarted();
 850         while (sw.elapsed(TimeUnit.MILLISECONDS) <= 10000) {
 851             Optional<NormalizedNode<?, ?>> possible = dataStore.newReadOnlyTransaction()
 852                     .read(entityPath(entity.getType(), entity.getIdentifier()).node(Candidate.QNAME))
 853                     .get(5, TimeUnit.SECONDS);
 854             try {
 855                 assertTrue("Candidates not found for " + entity, possible.isPresent());
 856                 Collection<String> actual = new ArrayList<>();
 857                 for (MapEntryNode candidate: ((MapNode)possible.get()).getValue()) {
 858                     actual.add(candidate.getChild(CANDIDATE_NAME_NODE_ID).get().getValue().toString());
 859                 }
 860
 861                 assertEquals("Candidates for " + entity, Arrays.asList(expCandidates), actual);
 862                 return;
 863             } catch (AssertionError e) {
 864                 lastError = e;
 865                 Uninterruptibles.sleepUninterruptibly(300, TimeUnit.MILLISECONDS);
 866             }
 867         }
 868
 869         throw lastError;
 870     }
 871
 872     @SuppressWarnings("checkstyle:IllegalCatch")
 873     private static void verifyOwner(final AbstractDataStore dataStore, final DOMEntity entity,
 874             final String expOwner) {
 875         AbstractEntityOwnershipTest.verifyOwner(expOwner, entity.getType(), entity.getIdentifier(), path -> {
 876             try {
 877                 return dataStore.newReadOnlyTransaction().read(path).get(5, TimeUnit.SECONDS).get();
 878             } catch (Exception e) {
 879                 return null;
 880             }
 881         });
 882     }
 883 }