opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/RaftActorServerConfigurationSupportTest.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.raft;
   9
  10 import static org.junit.Assert.assertEquals;
  11 import static org.junit.Assert.assertTrue;
  12 import static org.junit.Assert.fail;
  13 import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.assertNoneMatching;
  14 import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.clearMessages;
  15 import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.expectFirstMatching;
  16 import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.expectMatching;
  17
  18 import akka.actor.AbstractActor;
  19 import akka.actor.ActorRef;
  20 import akka.actor.Props;
  21 import akka.dispatch.Dispatchers;
  22 import akka.testkit.TestActorRef;
  23 import akka.testkit.javadsl.TestKit;
  24 import com.google.common.base.Stopwatch;
  25 import com.google.common.collect.ImmutableMap;
  26 import com.google.common.collect.ImmutableSet;
  27 import com.google.common.io.ByteSource;
  28 import com.google.common.util.concurrent.MoreExecutors;
  29 import java.io.OutputStream;
  30 import java.time.Duration;
  31 import java.util.ArrayList;
  32 import java.util.Arrays;
  33 import java.util.Collections;
  34 import java.util.HashMap;
  35 import java.util.HashSet;
  36 import java.util.List;
  37 import java.util.Map;
  38 import java.util.Optional;
  39 import java.util.concurrent.TimeUnit;
  40 import org.apache.commons.lang3.SerializationUtils;
  41 import org.junit.After;
  42 import org.junit.Before;
  43 import org.junit.Test;
  44 import org.opendaylight.controller.cluster.NonPersistentDataProvider;
  45 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
  46 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
  47 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  48 import org.opendaylight.controller.cluster.raft.base.messages.InitiateCaptureSnapshot;
  49 import org.opendaylight.controller.cluster.raft.base.messages.TimeoutNow;
  50 import org.opendaylight.controller.cluster.raft.behaviors.AbstractLeader;
  51 import org.opendaylight.controller.cluster.raft.behaviors.Follower;
  52 import org.opendaylight.controller.cluster.raft.behaviors.Leader;
  53 import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
  54 import org.opendaylight.controller.cluster.raft.messages.AddServer;
  55 import org.opendaylight.controller.cluster.raft.messages.AddServerReply;
  56 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
  57 import org.opendaylight.controller.cluster.raft.messages.ChangeServersVotingStatus;
  58 import org.opendaylight.controller.cluster.raft.messages.InstallSnapshot;
  59 import org.opendaylight.controller.cluster.raft.messages.RemoveServer;
  60 import org.opendaylight.controller.cluster.raft.messages.RemoveServerReply;
  61 import org.opendaylight.controller.cluster.raft.messages.RequestVote;
  62 import org.opendaylight.controller.cluster.raft.messages.ServerChangeReply;
  63 import org.opendaylight.controller.cluster.raft.messages.ServerChangeStatus;
  64 import org.opendaylight.controller.cluster.raft.messages.ServerRemoved;
  65 import org.opendaylight.controller.cluster.raft.messages.UnInitializedFollowerSnapshotReply;
  66 import org.opendaylight.controller.cluster.raft.persisted.ApplyJournalEntries;
  67 import org.opendaylight.controller.cluster.raft.persisted.ByteState;
  68 import org.opendaylight.controller.cluster.raft.persisted.ServerConfigurationPayload;
  69 import org.opendaylight.controller.cluster.raft.persisted.ServerInfo;
  70 import org.opendaylight.controller.cluster.raft.persisted.SimpleReplicatedLogEntry;
  71 import org.opendaylight.controller.cluster.raft.persisted.UpdateElectionTerm;
  72 import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
  73 import org.opendaylight.controller.cluster.raft.utils.ForwardMessageToBehaviorActor;
  74 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  75 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  76 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  77 import org.slf4j.Logger;
  78 import org.slf4j.LoggerFactory;
  79 import scala.concurrent.duration.FiniteDuration;
  80
  81 /**
  82  * Unit tests for RaftActorServerConfigurationSupport.
  83  *
  84  * @author Thomas Pantelis
  85  */
  86 public class RaftActorServerConfigurationSupportTest extends AbstractActorTest {
  87     static final String LEADER_ID = "leader";
  88     static final String FOLLOWER_ID = "follower";
  89     static final String FOLLOWER_ID2 = "follower2";
  90     static final String NEW_SERVER_ID = "new-server";
  91     static final String NEW_SERVER_ID2 = "new-server2";
  92     private static final Logger LOG = LoggerFactory.getLogger(RaftActorServerConfigurationSupportTest.class);
  93     private static final Class<?> COMMIT_MESSAGE_CLASS = RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT.getClass();
  94     private static final boolean NO_PERSISTENCE = false;
  95     private static final boolean PERSISTENT = true;
  96
  97     private final TestActorFactory actorFactory = new TestActorFactory(getSystem());
  98
  99     private final TestActorRef<ForwardMessageToBehaviorActor> followerActor = actorFactory.createTestActor(
 100             Props.create(ForwardMessageToBehaviorActor.class).withDispatcher(Dispatchers.DefaultDispatcherId()),
 101             actorFactory.generateActorId(FOLLOWER_ID));
 102
 103     private TestActorRef<MockNewFollowerRaftActor> newFollowerRaftActor;
 104     private ActorRef newFollowerCollectorActor;
 105     private RaftActorContext newFollowerActorContext;
 106
 107     private final TestKit testKit = new TestKit(getSystem());
 108
 109     @Before
 110     public void setup() {
 111         InMemoryJournal.clear();
 112         InMemorySnapshotStore.clear();
 113     }
 114
 115     @SuppressWarnings("checkstyle:IllegalCatch")
 116     private void setupNewFollower() {
 117         DefaultConfigParamsImpl configParams = newFollowerConfigParams();
 118
 119         newFollowerCollectorActor = actorFactory.createActor(MessageCollectorActor.props(),
 120                 actorFactory.generateActorId(NEW_SERVER_ID + "Collector"));
 121         newFollowerRaftActor = actorFactory.createTestActor(MockNewFollowerRaftActor.props(
 122                 configParams, newFollowerCollectorActor).withDispatcher(Dispatchers.DefaultDispatcherId()),
 123                 actorFactory.generateActorId(NEW_SERVER_ID));
 124
 125         try {
 126             newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext();
 127         } catch (Exception e) {
 128             newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext();
 129         }
 130     }
 131
 132     private static DefaultConfigParamsImpl newFollowerConfigParams() {
 133         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 134         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 135         configParams.setElectionTimeoutFactor(100000);
 136         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 137         return configParams;
 138     }
 139
 140     @After
 141     public void tearDown() {
 142         actorFactory.close();
 143     }
 144
 145     @Test
 146     public void testAddServerWithExistingFollower() {
 147         LOG.info("testAddServerWithExistingFollower starting");
 148         setupNewFollower();
 149         RaftActorContextImpl followerActorContext = newFollowerContext(FOLLOWER_ID, followerActor);
 150         followerActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 151                 0, 3, 1).build());
 152         followerActorContext.setCommitIndex(2);
 153         followerActorContext.setLastApplied(2);
 154
 155         Follower follower = new Follower(followerActorContext);
 156         followerActor.underlyingActor().setBehavior(follower);
 157         followerActorContext.setCurrentBehavior(follower);
 158
 159         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 160                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 161                         followerActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 162                 actorFactory.generateActorId(LEADER_ID));
 163
 164         // Expect initial heartbeat from the leader.
 165         expectFirstMatching(followerActor, AppendEntries.class);
 166         clearMessages(followerActor);
 167
 168         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 169         final ActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 170
 171         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 172
 173         // Leader should install snapshot - capture and verify ApplySnapshot contents
 174
 175         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 176         List<Object> snapshotState = MockRaftActor.fromState(applySnapshot.getSnapshot().getState());
 177         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 178
 179         AddServerReply addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 180         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 181         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 182
 183         // Verify ServerConfigurationPayload entry in leader's log
 184
 185         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 186         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 187         assertEquals("Leader journal last index", 3, leaderActorContext.getReplicatedLog().lastIndex());
 188         assertEquals("Leader commit index", 3, leaderActorContext.getCommitIndex());
 189         assertEquals("Leader last applied index", 3, leaderActorContext.getLastApplied());
 190         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 191                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 192
 193         // Verify ServerConfigurationPayload entry in both followers
 194
 195         expectFirstMatching(followerActor, ApplyState.class);
 196         assertEquals("Follower journal last index", 3, followerActorContext.getReplicatedLog().lastIndex());
 197         verifyServerConfigurationPayloadEntry(followerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 198                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 199
 200         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 201         assertEquals("New follower journal last index", 3, newFollowerActorContext.getReplicatedLog().lastIndex());
 202         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 203                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 204
 205         // Verify new server config was applied in both followers
 206
 207         assertEquals("Follower peers", ImmutableSet.of(LEADER_ID, NEW_SERVER_ID), followerActorContext.getPeerIds());
 208
 209         assertEquals("New follower peers", ImmutableSet.of(LEADER_ID, FOLLOWER_ID),
 210                 newFollowerActorContext.getPeerIds());
 211
 212         assertEquals("Follower commit index", 3, followerActorContext.getCommitIndex());
 213         assertEquals("Follower last applied index", 3, followerActorContext.getLastApplied());
 214         assertEquals("New follower commit index", 3, newFollowerActorContext.getCommitIndex());
 215         assertEquals("New follower last applied index", 3, newFollowerActorContext.getLastApplied());
 216
 217         assertEquals("Leader persisted ReplicatedLogImplEntry entries", 0,
 218                 InMemoryJournal.get(LEADER_ID, SimpleReplicatedLogEntry.class).size());
 219         assertEquals("Leader persisted ServerConfigurationPayload entries", 1,
 220                 InMemoryJournal.get(LEADER_ID, ServerConfigurationPayload.class).size());
 221
 222         assertEquals("New follower persisted ReplicatedLogImplEntry entries", 0,
 223                 InMemoryJournal.get(NEW_SERVER_ID, SimpleReplicatedLogEntry.class).size());
 224         assertEquals("New follower persisted ServerConfigurationPayload entries", 1,
 225                 InMemoryJournal.get(NEW_SERVER_ID, ServerConfigurationPayload.class).size());
 226
 227         LOG.info("testAddServerWithExistingFollower ending");
 228     }
 229
 230     @Test
 231     public void testAddServerWithNoExistingFollower() {
 232         LOG.info("testAddServerWithNoExistingFollower starting");
 233
 234         setupNewFollower();
 235         RaftActorContext initialActorContext = new MockRaftActorContext();
 236         initialActorContext.setCommitIndex(1);
 237         initialActorContext.setLastApplied(1);
 238         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 239                 0, 2, 1).build());
 240
 241         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 242                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 243                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 244                 actorFactory.generateActorId(LEADER_ID));
 245
 246         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 247         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 248
 249         final ActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 250
 251         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 252
 253         // Leader should install snapshot - capture and verify ApplySnapshot contents
 254
 255         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 256         List<Object> snapshotState = MockRaftActor.fromState(applySnapshot.getSnapshot().getState());
 257         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 258
 259         AddServerReply addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 260         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 261         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 262
 263         // Verify ServerConfigurationPayload entry in leader's log
 264
 265         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 266         assertEquals("Leader journal last index", 2, leaderActorContext.getReplicatedLog().lastIndex());
 267         assertEquals("Leader commit index", 2, leaderActorContext.getCommitIndex());
 268         assertEquals("Leader last applied index", 2, leaderActorContext.getLastApplied());
 269         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 270                 votingServer(NEW_SERVER_ID));
 271
 272         // Verify ServerConfigurationPayload entry in the new follower
 273
 274         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 275         assertEquals("New follower journal last index", 2, newFollowerActorContext.getReplicatedLog().lastIndex());
 276         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 277                 votingServer(NEW_SERVER_ID));
 278
 279         // Verify new server config was applied in the new follower
 280
 281         assertEquals("New follower peers", ImmutableSet.of(LEADER_ID), newFollowerActorContext.getPeerIds());
 282
 283         LOG.info("testAddServerWithNoExistingFollower ending");
 284     }
 285
 286     @Test
 287     public void testAddServersAsNonVoting() {
 288         LOG.info("testAddServersAsNonVoting starting");
 289
 290         setupNewFollower();
 291         RaftActorContext initialActorContext = new MockRaftActorContext();
 292
 293         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 294                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 295                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 296                 actorFactory.generateActorId(LEADER_ID));
 297
 298         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 299         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 300
 301         final ActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 302
 303         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), false), testKit.getRef());
 304
 305         AddServerReply addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 306         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 307         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 308
 309         // Verify ServerConfigurationPayload entry in leader's log
 310
 311         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 312
 313         assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex());
 314         assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex());
 315         assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied());
 316         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 317                 nonVotingServer(NEW_SERVER_ID));
 318
 319         // Verify ServerConfigurationPayload entry in the new follower
 320
 321         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 322         assertEquals("New follower journal last index", 0, newFollowerActorContext.getReplicatedLog().lastIndex());
 323         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 324                 nonVotingServer(NEW_SERVER_ID));
 325
 326         // Verify new server config was applied in the new follower
 327
 328         assertEquals("New follower peers", ImmutableSet.of(LEADER_ID), newFollowerActorContext.getPeerIds());
 329
 330         assertNoneMatching(newFollowerCollectorActor, InstallSnapshot.class, 500);
 331
 332         // Add another non-voting server.
 333
 334         clearMessages(leaderCollectorActor);
 335
 336         RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor);
 337         Follower newFollower2 = new Follower(follower2ActorContext);
 338         followerActor.underlyingActor().setBehavior(newFollower2);
 339
 340         leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit.getRef());
 341
 342         addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 343         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 344         assertEquals("getLeaderHint", Optional.of(LEADER_ID), addServerReply.getLeaderHint());
 345
 346         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 347         assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex());
 348         assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex());
 349         assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied());
 350         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(),
 351                 votingServer(LEADER_ID), nonVotingServer(NEW_SERVER_ID), nonVotingServer(NEW_SERVER_ID2));
 352
 353         LOG.info("testAddServersAsNonVoting ending");
 354     }
 355
 356     @Test
 357     public void testAddServerWithOperationInProgress() {
 358         LOG.info("testAddServerWithOperationInProgress starting");
 359
 360         setupNewFollower();
 361         RaftActorContext initialActorContext = new MockRaftActorContext();
 362
 363         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 364                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 365                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 366                 actorFactory.generateActorId(LEADER_ID));
 367
 368         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 369         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 370
 371         final ActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 372
 373         RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor);
 374         Follower newFollower2 = new Follower(follower2ActorContext);
 375         followerActor.underlyingActor().setBehavior(newFollower2);
 376
 377         MockNewFollowerRaftActor newFollowerRaftActorInstance = newFollowerRaftActor.underlyingActor();
 378         newFollowerRaftActorInstance.setDropMessageOfType(InstallSnapshot.class);
 379
 380         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 381
 382         // Wait for leader's install snapshot and capture it
 383
 384         InstallSnapshot installSnapshot = expectFirstMatching(newFollowerCollectorActor, InstallSnapshot.class);
 385
 386         // Send a second AddServer - should get queued
 387         TestKit testKit2 = new TestKit(getSystem());
 388         leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit2.getRef());
 389
 390         // Continue the first AddServer
 391         newFollowerRaftActorInstance.setDropMessageOfType(null);
 392         newFollowerRaftActor.tell(installSnapshot, leaderActor);
 393
 394         // Verify both complete successfully
 395         AddServerReply addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 396         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 397
 398         addServerReply = testKit2.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 399         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 400
 401         // Verify ServerConfigurationPayload entries in leader's log
 402
 403         expectMatching(leaderCollectorActor, ApplyState.class, 2);
 404         assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex());
 405         assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex());
 406         assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied());
 407         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(),
 408                 votingServer(LEADER_ID), votingServer(NEW_SERVER_ID), nonVotingServer(NEW_SERVER_ID2));
 409
 410         // Verify ServerConfigurationPayload entry in the new follower
 411
 412         expectMatching(newFollowerCollectorActor, ApplyState.class, 2);
 413         assertEquals("New follower peers", ImmutableSet.of(LEADER_ID, NEW_SERVER_ID2),
 414                newFollowerActorContext.getPeerIds());
 415
 416         LOG.info("testAddServerWithOperationInProgress ending");
 417     }
 418
 419     @Test
 420     public void testAddServerWithPriorSnapshotInProgress() {
 421         LOG.info("testAddServerWithPriorSnapshotInProgress starting");
 422
 423         setupNewFollower();
 424         RaftActorContext initialActorContext = new MockRaftActorContext();
 425
 426         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 427                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 428                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 429                 actorFactory.generateActorId(LEADER_ID));
 430
 431         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 432         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 433
 434         ActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 435
 436         // Drop commit message for now to delay snapshot completion
 437         leaderRaftActor.setDropMessageOfType(String.class);
 438
 439         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 440
 441         Object commitMsg = expectFirstMatching(leaderCollectorActor, COMMIT_MESSAGE_CLASS);
 442
 443         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 444
 445         leaderRaftActor.setDropMessageOfType(null);
 446         leaderActor.tell(commitMsg, leaderActor);
 447
 448         AddServerReply addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 449         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 450         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 451
 452         expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 453
 454         // Verify ServerConfigurationPayload entry in leader's log
 455
 456         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 457         assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex());
 458         assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex());
 459         assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied());
 460         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 461                 votingServer(NEW_SERVER_ID));
 462
 463         LOG.info("testAddServerWithPriorSnapshotInProgress ending");
 464     }
 465
 466     @Test
 467     public void testAddServerWithPriorSnapshotCompleteTimeout() {
 468         LOG.info("testAddServerWithPriorSnapshotCompleteTimeout starting");
 469
 470         setupNewFollower();
 471         RaftActorContext initialActorContext = new MockRaftActorContext();
 472
 473         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 474                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 475                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 476                 actorFactory.generateActorId(LEADER_ID));
 477
 478         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 479         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 480
 481         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(1);
 482
 483         // Drop commit message so the snapshot doesn't complete.
 484         leaderRaftActor.setDropMessageOfType(COMMIT_MESSAGE_CLASS);
 485
 486         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 487
 488         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 489
 490         AddServerReply addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 491         assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus());
 492
 493         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 494
 495         LOG.info("testAddServerWithPriorSnapshotCompleteTimeout ending");
 496     }
 497
 498     @Test
 499     public void testAddServerWithLeaderChangeBeforePriorSnapshotComplete() {
 500         LOG.info("testAddServerWithLeaderChangeBeforePriorSnapshotComplete starting");
 501
 502         setupNewFollower();
 503         RaftActorContext initialActorContext = new MockRaftActorContext();
 504
 505         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 506                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 507                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 508                 actorFactory.generateActorId(LEADER_ID));
 509
 510         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 511         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 512         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(100);
 513
 514         final ActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 515
 516         // Drop the commit message so the snapshot doesn't complete yet.
 517         leaderRaftActor.setDropMessageOfType(COMMIT_MESSAGE_CLASS);
 518
 519         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 520
 521         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 522
 523         Object commitMsg = expectFirstMatching(leaderCollectorActor, COMMIT_MESSAGE_CLASS);
 524
 525         // Change the leader behavior to follower
 526         leaderActor.tell(new Follower(leaderActorContext), leaderActor);
 527
 528         // Drop CaptureSnapshotReply in case install snapshot is incorrectly initiated after the prior
 529         // snapshot completes. This will prevent the invalid snapshot from completing and fail the
 530         // isCapturing assertion below.
 531         leaderRaftActor.setDropMessageOfType(CaptureSnapshotReply.class);
 532
 533         // Complete the prior snapshot - this should be a no-op b/c it's no longer the leader
 534         leaderActor.tell(commitMsg, leaderActor);
 535
 536         leaderActor.tell(new RaftActorServerConfigurationSupport.ServerOperationTimeout(NEW_SERVER_ID), leaderActor);
 537
 538         AddServerReply addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 539         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 540
 541         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 542         assertEquals("isCapturing", false, leaderActorContext.getSnapshotManager().isCapturing());
 543
 544         LOG.info("testAddServerWithLeaderChangeBeforePriorSnapshotComplete ending");
 545     }
 546
 547     @Test
 548     public void testAddServerWithLeaderChangeDuringInstallSnapshot() {
 549         LOG.info("testAddServerWithLeaderChangeDuringInstallSnapshot starting");
 550
 551         setupNewFollower();
 552         RaftActorContext initialActorContext = new MockRaftActorContext();
 553
 554         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 555                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 556                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 557                 actorFactory.generateActorId(LEADER_ID));
 558
 559         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 560         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 561
 562         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(8);
 563
 564         ActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 565
 566         // Drop the UnInitializedFollowerSnapshotReply to delay it.
 567         leaderRaftActor.setDropMessageOfType(UnInitializedFollowerSnapshotReply.class);
 568
 569         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 570
 571         final UnInitializedFollowerSnapshotReply snapshotReply = expectFirstMatching(leaderCollectorActor,
 572                 UnInitializedFollowerSnapshotReply.class);
 573
 574         // Prevent election timeout when the leader switches to follower
 575         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(100);
 576
 577         // Change the leader behavior to follower
 578         leaderActor.tell(new Follower(leaderActorContext), leaderActor);
 579
 580         // Send the captured UnInitializedFollowerSnapshotReply - should be a no-op
 581         leaderRaftActor.setDropMessageOfType(null);
 582         leaderActor.tell(snapshotReply, leaderActor);
 583
 584         AddServerReply addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 585         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 586
 587         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 588
 589         LOG.info("testAddServerWithLeaderChangeDuringInstallSnapshot ending");
 590     }
 591
 592     @Test
 593     public void testAddServerWithInstallSnapshotTimeout() {
 594         LOG.info("testAddServerWithInstallSnapshotTimeout starting");
 595
 596         setupNewFollower();
 597         RaftActorContext initialActorContext = new MockRaftActorContext();
 598
 599         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 600                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 601                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 602                 actorFactory.generateActorId(LEADER_ID));
 603
 604         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 605         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 606         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(1);
 607
 608         // Drop the InstallSnapshot message so it times out
 609         newFollowerRaftActor.underlyingActor().setDropMessageOfType(InstallSnapshot.class);
 610
 611         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 612
 613         leaderActor.tell(new UnInitializedFollowerSnapshotReply("bogus"), leaderActor);
 614
 615         AddServerReply addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 616         assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus());
 617
 618         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 619         assertEquals("Leader followers size", 0,
 620                 ((AbstractLeader)leaderRaftActor.getCurrentBehavior()).getFollowerIds().size());
 621
 622         LOG.info("testAddServerWithInstallSnapshotTimeout ending");
 623     }
 624
 625     @Test
 626     public void testAddServerWithNoLeader() {
 627         LOG.info("testAddServerWithNoLeader starting");
 628
 629         setupNewFollower();
 630         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 631         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 632
 633         TestActorRef<MockRaftActor> noLeaderActor = actorFactory.createTestActor(
 634                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 635                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false))
 636                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 637                 actorFactory.generateActorId(LEADER_ID));
 638         noLeaderActor.underlyingActor().waitForInitializeBehaviorComplete();
 639
 640         noLeaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true),
 641                 testKit.getRef());
 642         AddServerReply addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 643         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 644
 645         LOG.info("testAddServerWithNoLeader ending");
 646     }
 647
 648     @Test
 649     public void testAddServerWithNoConsensusReached() {
 650         LOG.info("testAddServerWithNoConsensusReached starting");
 651
 652         setupNewFollower();
 653         RaftActorContext initialActorContext = new MockRaftActorContext();
 654
 655         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 656                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 657                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 658                 actorFactory.generateActorId(LEADER_ID));
 659
 660         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 661         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 662
 663         final ActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 664
 665         // Drop UnInitializedFollowerSnapshotReply initially
 666         leaderRaftActor.setDropMessageOfType(UnInitializedFollowerSnapshotReply.class);
 667
 668         MockNewFollowerRaftActor newFollowerRaftActorInstance = newFollowerRaftActor.underlyingActor();
 669         newFollowerCollectorActor = newCollectorActor(newFollowerRaftActorInstance, NEW_SERVER_ID);
 670
 671         // Drop AppendEntries to the new follower so consensus isn't reached
 672         newFollowerRaftActorInstance.setDropMessageOfType(AppendEntries.class);
 673
 674         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 675
 676         // Capture the UnInitializedFollowerSnapshotReply
 677         Object snapshotReply = expectFirstMatching(leaderCollectorActor, UnInitializedFollowerSnapshotReply.class);
 678
 679         // Send the UnInitializedFollowerSnapshotReply to resume the first request
 680         leaderRaftActor.setDropMessageOfType(null);
 681         leaderActor.tell(snapshotReply, leaderActor);
 682
 683         expectFirstMatching(newFollowerCollectorActor, AppendEntries.class);
 684
 685         // Send a second AddServer
 686         leaderActor.tell(new AddServer(NEW_SERVER_ID2, "", false), testKit.getRef());
 687
 688         // The first AddServer should succeed with OK even though consensus wasn't reached
 689         AddServerReply addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 690         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 691         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 692
 693         // Verify ServerConfigurationPayload entry in leader's log
 694         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 695                 votingServer(NEW_SERVER_ID));
 696
 697         // The second AddServer should fail since consensus wasn't reached for the first
 698         addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 699         assertEquals("getStatus", ServerChangeStatus.PRIOR_REQUEST_CONSENSUS_TIMEOUT, addServerReply.getStatus());
 700
 701         // Re-send the second AddServer - should also fail
 702         leaderActor.tell(new AddServer(NEW_SERVER_ID2, "", false), testKit.getRef());
 703         addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 704         assertEquals("getStatus", ServerChangeStatus.PRIOR_REQUEST_CONSENSUS_TIMEOUT, addServerReply.getStatus());
 705
 706         LOG.info("testAddServerWithNoConsensusReached ending");
 707     }
 708
 709     @Test
 710     public void testAddServerWithExistingServer() {
 711         LOG.info("testAddServerWithExistingServer starting");
 712
 713         RaftActorContext initialActorContext = new MockRaftActorContext();
 714
 715         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 716                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 717                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 718                 actorFactory.generateActorId(LEADER_ID));
 719
 720         leaderActor.tell(new AddServer(FOLLOWER_ID, followerActor.path().toString(), true), testKit.getRef());
 721
 722         AddServerReply addServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), AddServerReply.class);
 723         assertEquals("getStatus", ServerChangeStatus.ALREADY_EXISTS, addServerReply.getStatus());
 724
 725         LOG.info("testAddServerWithExistingServer ending");
 726     }
 727
 728     @Test
 729     public void testAddServerForwardedToLeader() {
 730         LOG.info("testAddServerForwardedToLeader starting");
 731
 732         setupNewFollower();
 733         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 734         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 735
 736         ActorRef leaderActor = actorFactory.createActor(
 737                 MessageCollectorActor.props(), actorFactory.generateActorId(LEADER_ID));
 738
 739         TestActorRef<MockRaftActor> followerRaftActor = actorFactory.createTestActor(
 740                 MockRaftActor.builder().id(FOLLOWER_ID).peerAddresses(ImmutableMap.of(LEADER_ID,
 741                         leaderActor.path().toString())).config(configParams).persistent(Optional.of(false))
 742                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 743                 actorFactory.generateActorId(FOLLOWER_ID));
 744         followerRaftActor.underlyingActor().waitForInitializeBehaviorComplete();
 745
 746         followerRaftActor.tell(new AppendEntries(1, LEADER_ID, 0, 1, Collections.<ReplicatedLogEntry>emptyList(),
 747                 -1, -1, (short)0), leaderActor);
 748
 749         followerRaftActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true),
 750                 testKit.getRef());
 751         expectFirstMatching(leaderActor, AddServer.class);
 752
 753         LOG.info("testAddServerForwardedToLeader ending");
 754     }
 755
 756     @Test
 757     public void testOnApplyState() {
 758         LOG.info("testOnApplyState starting");
 759
 760         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 761         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 762         TestActorRef<MockRaftActor> noLeaderActor = actorFactory.createTestActor(
 763                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 764                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false))
 765                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 766                 actorFactory.generateActorId(LEADER_ID));
 767
 768         RaftActorServerConfigurationSupport support = new RaftActorServerConfigurationSupport(
 769                 noLeaderActor.underlyingActor());
 770
 771         ReplicatedLogEntry serverConfigEntry = new SimpleReplicatedLogEntry(1, 1,
 772                 new ServerConfigurationPayload(Collections.<ServerInfo>emptyList()));
 773         boolean handled = support.handleMessage(new ApplyState(null, null, serverConfigEntry), ActorRef.noSender());
 774         assertEquals("Message handled", true, handled);
 775
 776         ReplicatedLogEntry nonServerConfigEntry = new SimpleReplicatedLogEntry(1, 1,
 777                 new MockRaftActorContext.MockPayload("1"));
 778         handled = support.handleMessage(new ApplyState(null, null, nonServerConfigEntry), ActorRef.noSender());
 779         assertEquals("Message handled", false, handled);
 780
 781         LOG.info("testOnApplyState ending");
 782     }
 783
 784     @Test
 785     public void testRemoveServerWithNoLeader() {
 786         LOG.info("testRemoveServerWithNoLeader starting");
 787
 788         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 789         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 790
 791         TestActorRef<MockRaftActor> leaderActor = actorFactory.createTestActor(
 792                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 793                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false))
 794                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 795                 actorFactory.generateActorId(LEADER_ID));
 796         leaderActor.underlyingActor().waitForInitializeBehaviorComplete();
 797
 798         leaderActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef());
 799         RemoveServerReply removeServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), RemoveServerReply.class);
 800         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, removeServerReply.getStatus());
 801
 802         LOG.info("testRemoveServerWithNoLeader ending");
 803     }
 804
 805     @Test
 806     public void testRemoveServerNonExistentServer() {
 807         LOG.info("testRemoveServerNonExistentServer starting");
 808
 809         RaftActorContext initialActorContext = new MockRaftActorContext();
 810
 811         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 812                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 813                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 814                 actorFactory.generateActorId(LEADER_ID));
 815
 816         leaderActor.tell(new RemoveServer(NEW_SERVER_ID), testKit.getRef());
 817         RemoveServerReply removeServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), RemoveServerReply.class);
 818         assertEquals("getStatus", ServerChangeStatus.DOES_NOT_EXIST, removeServerReply.getStatus());
 819
 820         LOG.info("testRemoveServerNonExistentServer ending");
 821     }
 822
 823     @Test
 824     public void testRemoveServerForwardToLeader() {
 825         LOG.info("testRemoveServerForwardToLeader starting");
 826
 827         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 828         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 829
 830         ActorRef leaderActor = actorFactory.createTestActor(
 831                 MessageCollectorActor.props(), actorFactory.generateActorId(LEADER_ID));
 832
 833         TestActorRef<MockRaftActor> followerRaftActor = actorFactory.createTestActor(
 834                 MockRaftActor.builder().id(FOLLOWER_ID).peerAddresses(ImmutableMap.of(LEADER_ID,
 835                         leaderActor.path().toString())).config(configParams).persistent(Optional.of(false))
 836                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 837                 actorFactory.generateActorId(FOLLOWER_ID));
 838         followerRaftActor.underlyingActor().waitForInitializeBehaviorComplete();
 839
 840         followerRaftActor.tell(new AppendEntries(1, LEADER_ID, 0, 1, Collections.<ReplicatedLogEntry>emptyList(),
 841                 -1, -1, (short)0), leaderActor);
 842
 843         followerRaftActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef());
 844         expectFirstMatching(leaderActor, RemoveServer.class);
 845
 846         LOG.info("testRemoveServerForwardToLeader ending");
 847     }
 848
 849     @Test
 850     public void testRemoveServer() {
 851         LOG.info("testRemoveServer starting");
 852
 853         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 854         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 855         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 856
 857         final String follower1ActorId = actorFactory.generateActorId(FOLLOWER_ID);
 858         final String follower1ActorPath = actorFactory.createTestActorPath(follower1ActorId);
 859         final String follower2ActorId = actorFactory.generateActorId(FOLLOWER_ID2);
 860         final String follower2ActorPath = actorFactory.createTestActorPath(follower2ActorId);
 861         RaftActorContext initialActorContext = new MockRaftActorContext();
 862
 863         final String downNodeId = "downNode";
 864         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(MockLeaderRaftActor.props(
 865                 ImmutableMap.of(FOLLOWER_ID, follower1ActorPath, FOLLOWER_ID2, follower2ActorPath, downNodeId, ""),
 866                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 867                 actorFactory.generateActorId(LEADER_ID));
 868
 869         final ActorRef leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor());
 870
 871         ActorRef follower1Collector = actorFactory.createActor(
 872                 MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
 873         final TestActorRef<CollectingMockRaftActor> follower1Actor = actorFactory.createTestActor(
 874                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
 875                         FOLLOWER_ID2, follower2ActorPath, downNodeId, ""), configParams, NO_PERSISTENCE,
 876                         follower1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), follower1ActorId);
 877
 878         ActorRef follower2Collector = actorFactory.createActor(
 879                 MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
 880         final TestActorRef<CollectingMockRaftActor> follower2Actor = actorFactory.createTestActor(
 881                 CollectingMockRaftActor.props(FOLLOWER_ID2, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
 882                         FOLLOWER_ID, follower1ActorPath, downNodeId, ""), configParams, NO_PERSISTENCE,
 883                         follower2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), follower2ActorId);
 884
 885         leaderActor.underlyingActor().waitForInitializeBehaviorComplete();
 886         follower1Actor.underlyingActor().waitForInitializeBehaviorComplete();
 887         follower2Actor.underlyingActor().waitForInitializeBehaviorComplete();
 888
 889         leaderActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef());
 890         RemoveServerReply removeServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), RemoveServerReply.class);
 891         assertEquals("getStatus", ServerChangeStatus.OK, removeServerReply.getStatus());
 892
 893         ApplyState applyState = MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
 894         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
 895         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
 896                 votingServer(LEADER_ID), votingServer(FOLLOWER_ID2), votingServer(downNodeId));
 897
 898         applyState = MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
 899         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
 900         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
 901                 votingServer(LEADER_ID), votingServer(FOLLOWER_ID2), votingServer(downNodeId));
 902
 903         RaftActorBehavior currentBehavior = leaderActor.underlyingActor().getCurrentBehavior();
 904         assertTrue("Expected Leader", currentBehavior instanceof Leader);
 905         assertEquals("Follower ids size", 2, ((Leader)currentBehavior).getFollowerIds().size());
 906
 907         MessageCollectorActor.expectFirstMatching(follower1Collector, ServerRemoved.class);
 908
 909         LOG.info("testRemoveServer ending");
 910     }
 911
 912     @Test
 913     public void testRemoveServerLeader() {
 914         LOG.info("testRemoveServerLeader starting");
 915
 916         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 917         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 918         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 919
 920         final String followerActorId = actorFactory.generateActorId(FOLLOWER_ID);
 921         final String followerActorPath = actorFactory.createTestActorPath(followerActorId);
 922         RaftActorContext initialActorContext = new MockRaftActorContext();
 923
 924         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 925                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActorPath),
 926                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 927                 actorFactory.generateActorId(LEADER_ID));
 928
 929         final ActorRef leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor());
 930
 931         final ActorRef followerCollector =
 932                 actorFactory.createActor(MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
 933         actorFactory.createTestActor(
 934                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString()),
 935                         configParams, NO_PERSISTENCE, followerCollector)
 936                         .withDispatcher(Dispatchers.DefaultDispatcherId()),
 937                 followerActorId);
 938
 939         leaderActor.tell(new RemoveServer(LEADER_ID), testKit.getRef());
 940         RemoveServerReply removeServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), RemoveServerReply.class);
 941         assertEquals("getStatus", ServerChangeStatus.OK, removeServerReply.getStatus());
 942
 943         final ApplyState applyState = MessageCollectorActor.expectFirstMatching(followerCollector, ApplyState.class);
 944         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
 945         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
 946                 votingServer(FOLLOWER_ID));
 947
 948         MessageCollectorActor.expectFirstMatching(leaderCollector, ServerRemoved.class);
 949
 950         LOG.info("testRemoveServerLeader ending");
 951     }
 952
 953     @Test
 954     public void testRemoveServerLeaderWithNoFollowers() {
 955         LOG.info("testRemoveServerLeaderWithNoFollowers starting");
 956
 957         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 958                 MockLeaderRaftActor.props(Collections.<String, String>emptyMap(),
 959                         new MockRaftActorContext()).withDispatcher(Dispatchers.DefaultDispatcherId()),
 960                 actorFactory.generateActorId(LEADER_ID));
 961
 962         leaderActor.tell(new RemoveServer(LEADER_ID), testKit.getRef());
 963         RemoveServerReply removeServerReply = testKit.expectMsgClass(Duration.ofSeconds(5), RemoveServerReply.class);
 964         assertEquals("getStatus", ServerChangeStatus.NOT_SUPPORTED, removeServerReply.getStatus());
 965
 966         LOG.info("testRemoveServerLeaderWithNoFollowers ending");
 967     }
 968
 969     @Test
 970     public void testChangeServersVotingStatus() {
 971         LOG.info("testChangeServersVotingStatus starting");
 972
 973         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 974         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 975         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 976
 977         final String follower1ActorId = actorFactory.generateActorId(FOLLOWER_ID);
 978         final String follower1ActorPath = actorFactory.createTestActorPath(follower1ActorId);
 979         final String follower2ActorId = actorFactory.generateActorId(FOLLOWER_ID2);
 980         final String follower2ActorPath = actorFactory.createTestActorPath(follower2ActorId);
 981
 982         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 983                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, follower1ActorPath,
 984                         FOLLOWER_ID2, follower2ActorPath), new MockRaftActorContext())
 985                         .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
 986         ActorRef leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor());
 987
 988         ActorRef follower1Collector = actorFactory.createActor(
 989                 MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
 990         final TestActorRef<CollectingMockRaftActor> follower1RaftActor = actorFactory.createTestActor(
 991                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
 992                         FOLLOWER_ID2, follower2ActorPath), configParams, NO_PERSISTENCE, follower1Collector)
 993                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower1ActorId);
 994
 995         ActorRef follower2Collector = actorFactory.createActor(
 996                 MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
 997         final TestActorRef<CollectingMockRaftActor> follower2RaftActor = actorFactory.createTestActor(
 998                 CollectingMockRaftActor.props(FOLLOWER_ID2, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
 999                         FOLLOWER_ID, follower1ActorPath), configParams, NO_PERSISTENCE, follower2Collector)
1000                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower2ActorId);
1001
1002         // Send first ChangeServersVotingStatus message
1003
1004         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(FOLLOWER_ID, false, FOLLOWER_ID2, false)),
1005                 testKit.getRef());
1006         ServerChangeReply reply = testKit.expectMsgClass(Duration.ofSeconds(5), ServerChangeReply.class);
1007         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1008
1009         final ApplyState applyState = MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
1010         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
1011         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1012                 votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1013
1014         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
1015         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext()
1016                 .getReplicatedLog(), votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID),
1017                 nonVotingServer(FOLLOWER_ID2));
1018
1019         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1020         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext()
1021                 .getReplicatedLog(), votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID),
1022                 nonVotingServer(FOLLOWER_ID2));
1023
1024         MessageCollectorActor.clearMessages(leaderCollector);
1025         MessageCollectorActor.clearMessages(follower1Collector);
1026         MessageCollectorActor.clearMessages(follower2Collector);
1027
1028         // Send second ChangeServersVotingStatus message
1029
1030         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(FOLLOWER_ID, true)), testKit.getRef());
1031         reply = testKit.expectMsgClass(Duration.ofSeconds(5), ServerChangeReply.class);
1032         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1033
1034         MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
1035         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1036                 votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1037
1038         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
1039         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext()
1040                 .getReplicatedLog(), votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1041
1042         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1043         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext()
1044                 .getReplicatedLog(), votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1045
1046         LOG.info("testChangeServersVotingStatus ending");
1047     }
1048
1049     @Test
1050     public void testChangeLeaderToNonVoting() {
1051         LOG.info("testChangeLeaderToNonVoting starting");
1052
1053         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1054         configParams.setHeartBeatInterval(new FiniteDuration(500, TimeUnit.MILLISECONDS));
1055
1056         final String follower1ActorId = actorFactory.generateActorId(FOLLOWER_ID);
1057         final String follower1ActorPath = actorFactory.createTestActorPath(follower1ActorId);
1058         final String follower2ActorId = actorFactory.generateActorId(FOLLOWER_ID2);
1059         final String follower2ActorPath = actorFactory.createTestActorPath(follower2ActorId);
1060
1061         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
1062                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, follower1ActorPath,
1063                         FOLLOWER_ID2, follower2ActorPath), new MockRaftActorContext())
1064                         .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
1065         ActorRef leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor());
1066
1067         ActorRef follower1Collector = actorFactory.createActor(
1068                 MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
1069         final TestActorRef<CollectingMockRaftActor> follower1RaftActor = actorFactory.createTestActor(
1070                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
1071                         FOLLOWER_ID2, follower2ActorPath), configParams, NO_PERSISTENCE, follower1Collector)
1072                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower1ActorId);
1073
1074         ActorRef follower2Collector = actorFactory.createActor(
1075                 MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
1076         final TestActorRef<CollectingMockRaftActor> follower2RaftActor = actorFactory.createTestActor(
1077                 CollectingMockRaftActor.props(FOLLOWER_ID2, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
1078                         FOLLOWER_ID, follower1ActorPath), configParams, NO_PERSISTENCE, follower2Collector)
1079                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower2ActorId);
1080
1081         // Send ChangeServersVotingStatus message
1082
1083         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(LEADER_ID, false)), testKit.getRef());
1084         ServerChangeReply reply = testKit.expectMsgClass(Duration.ofSeconds(5), ServerChangeReply.class);
1085         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1086
1087         MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
1088         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1089                 nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1090
1091         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
1092         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext()
1093                 .getReplicatedLog(), nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1094
1095         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1096         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext()
1097                 .getReplicatedLog(), nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1098
1099         verifyRaftState(RaftState.Leader, follower1RaftActor.underlyingActor(), follower2RaftActor.underlyingActor());
1100         verifyRaftState(RaftState.Follower, leaderActor.underlyingActor());
1101
1102         MessageCollectorActor.expectMatching(leaderCollector, AppendEntries.class, 2);
1103
1104         LOG.info("testChangeLeaderToNonVoting ending");
1105     }
1106
1107     @Test
1108     public void testChangeLeaderToNonVotingInSingleNode() {
1109         LOG.info("testChangeLeaderToNonVotingInSingleNode starting");
1110
1111         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
1112                 MockLeaderRaftActor.props(ImmutableMap.of(), new MockRaftActorContext())
1113                         .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
1114
1115         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(LEADER_ID, false)), testKit.getRef());
1116         ServerChangeReply reply = testKit.expectMsgClass(Duration.ofSeconds(5), ServerChangeReply.class);
1117         assertEquals("getStatus", ServerChangeStatus.INVALID_REQUEST, reply.getStatus());
1118
1119         LOG.info("testChangeLeaderToNonVotingInSingleNode ending");
1120     }
1121
1122     @Test
1123     public void testChangeToVotingWithNoLeader() {
1124         LOG.info("testChangeToVotingWithNoLeader starting");
1125
1126         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1127         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1128         configParams.setElectionTimeoutFactor(5);
1129
1130         final String node1ID = "node1";
1131         final String node2ID = "node2";
1132
1133         // Set up a persisted ServerConfigurationPayload. Initially node1 and node2 will come up as non-voting.
1134         // via the server config. The server config will also contain 2 voting peers that are down (ie no
1135         // actors created).
1136
1137         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1138                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, false),
1139                 new ServerInfo("downNode1", true), new ServerInfo("downNode2", true)));
1140         SimpleReplicatedLogEntry persistedServerConfigEntry = new SimpleReplicatedLogEntry(0, 1, persistedServerConfig);
1141
1142         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "downNode1"));
1143         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1144         InMemoryJournal.addEntry(node1ID, 3, new ApplyJournalEntries(0));
1145         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "downNode2"));
1146         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1147         InMemoryJournal.addEntry(node2ID, 3, new ApplyJournalEntries(0));
1148
1149         ActorRef node1Collector = actorFactory.createActor(
1150                 MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
1151         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1152                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1153                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1154         CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1155
1156         ActorRef node2Collector = actorFactory.createActor(
1157                 MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
1158         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1159                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1160                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1161         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1162
1163         node1RaftActor.waitForInitializeBehaviorComplete();
1164         node2RaftActor.waitForInitializeBehaviorComplete();
1165
1166         // Verify the intended server config was loaded and applied.
1167         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1168                 nonVotingServer(node1ID), nonVotingServer(node2ID), votingServer("downNode1"),
1169                 votingServer("downNode2"));
1170         assertEquals("isVotingMember", false, node1RaftActor.getRaftActorContext().isVotingMember());
1171         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1172         assertEquals("getLeaderId", null, node1RaftActor.getLeaderId());
1173
1174         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1175                 nonVotingServer(node1ID), nonVotingServer(node2ID), votingServer("downNode1"),
1176                 votingServer("downNode2"));
1177         assertEquals("isVotingMember", false, node2RaftActor.getRaftActorContext().isVotingMember());
1178
1179         // For the test, we send a ChangeServersVotingStatus message to node1 to flip the voting states for
1180         // each server, ie node1 and node2 to voting and the 2 down nodes to non-voting. This should cause
1181         // node1 to try to elect itself as leader in order to apply the new server config. Since the 2
1182         // down nodes are switched to non-voting, node1 should only need a vote from node2.
1183
1184         // First send the message such that node1 has no peer address for node2 - should fail.
1185
1186         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true,
1187                 node2ID, true, "downNode1", false, "downNode2", false));
1188         node1RaftActorRef.tell(changeServers, testKit.getRef());
1189         ServerChangeReply reply = testKit.expectMsgClass(Duration.ofSeconds(5), ServerChangeReply.class);
1190         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, reply.getStatus());
1191         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1192
1193         // Send an AppendEntries so node1 has a leaderId
1194
1195         long term = node1RaftActor.getRaftActorContext().getTermInformation().getCurrentTerm();
1196         node1RaftActorRef.tell(new AppendEntries(term, "downNode1", -1L, -1L,
1197                 Collections.<ReplicatedLogEntry>emptyList(), 0, -1, (short)1), ActorRef.noSender());
1198
1199         // Wait for the ElectionTimeout to clear the leaderId. The leaderId must be null so on the next
1200         // ChangeServersVotingStatus message, it will try to elect a leader.
1201
1202         AbstractRaftActorIntegrationTest.verifyRaftState(node1RaftActorRef,
1203             rs -> assertEquals("getLeader", null, rs.getLeader()));
1204
1205         // Update node2's peer address and send the message again
1206
1207         node1RaftActor.setPeerAddress(node2ID, node2RaftActorRef.path().toString());
1208
1209         node1RaftActorRef.tell(changeServers, testKit.getRef());
1210         reply = testKit.expectMsgClass(Duration.ofSeconds(5), ServerChangeReply.class);
1211         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1212
1213         ApplyJournalEntries apply = MessageCollectorActor.expectFirstMatching(node1Collector,
1214                 ApplyJournalEntries.class);
1215         assertEquals("getToIndex", 1, apply.getToIndex());
1216         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1217                 votingServer(node1ID), votingServer(node2ID), nonVotingServer("downNode1"),
1218                 nonVotingServer("downNode2"));
1219         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1220         assertEquals("getRaftState", RaftState.Leader, node1RaftActor.getRaftState());
1221
1222         apply = MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1223         assertEquals("getToIndex", 1, apply.getToIndex());
1224         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1225                 votingServer(node1ID), votingServer(node2ID), nonVotingServer("downNode1"),
1226                 nonVotingServer("downNode2"));
1227         assertEquals("isVotingMember", true, node2RaftActor.getRaftActorContext().isVotingMember());
1228         assertEquals("getRaftState", RaftState.Follower, node2RaftActor.getRaftState());
1229
1230         LOG.info("testChangeToVotingWithNoLeader ending");
1231     }
1232
1233     @Test
1234     public void testChangeToVotingWithNoLeaderAndElectionTimeout() {
1235         LOG.info("testChangeToVotingWithNoLeaderAndElectionTimeout starting");
1236
1237         final String node1ID = "node1";
1238         final String node2ID = "node2";
1239
1240         final PeerAddressResolver peerAddressResolver = peerId -> peerId.equals(node1ID)
1241                 ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID)
1242                         ? actorFactory.createTestActorPath(node2ID) : null;
1243
1244         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1245                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, true)));
1246         SimpleReplicatedLogEntry persistedServerConfigEntry = new SimpleReplicatedLogEntry(0, 1, persistedServerConfig);
1247
1248         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1249         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1250         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1251         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1252
1253         DefaultConfigParamsImpl configParams1 = new DefaultConfigParamsImpl();
1254         configParams1.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1255         configParams1.setElectionTimeoutFactor(1);
1256         configParams1.setPeerAddressResolver(peerAddressResolver);
1257         ActorRef node1Collector = actorFactory.createActor(
1258                 MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
1259         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1260                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams1,
1261                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1262         final CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1263
1264         DefaultConfigParamsImpl configParams2 = new DefaultConfigParamsImpl();
1265         configParams2.setElectionTimeoutFactor(1000000);
1266         configParams2.setPeerAddressResolver(peerAddressResolver);
1267         ActorRef node2Collector = actorFactory.createActor(
1268                 MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
1269         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1270                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams2,
1271                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1272         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1273
1274         // Send a ChangeServersVotingStatus message to node1 to change mode1 to voting. This should cause
1275         // node1 to try to elect itself as leader in order to apply the new server config. But we'll drop
1276         // RequestVote messages in node2 which should cause node1 to time out and revert back to the previous
1277         // server config and fail with NO_LEADER. Note that node1 shouldn't forward the request to node2 b/c
1278         // node2 was previously voting.
1279
1280         node2RaftActor.setDropMessageOfType(RequestVote.class);
1281
1282         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true));
1283         node1RaftActorRef.tell(changeServers, testKit.getRef());
1284         ServerChangeReply reply = testKit.expectMsgClass(Duration.ofSeconds(5), ServerChangeReply.class);
1285         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, reply.getStatus());
1286
1287         assertEquals("Server config", ImmutableSet.of(nonVotingServer(node1ID), votingServer(node2ID)),
1288             new HashSet<>(node1RaftActor.getRaftActorContext().getPeerServerInfo(true).getServerConfig()));
1289         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1290
1291         LOG.info("testChangeToVotingWithNoLeaderAndElectionTimeout ending");
1292     }
1293
1294     @Test
1295     public void testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout() {
1296         LOG.info("testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout starting");
1297
1298         final String node1ID = "node1";
1299         final String node2ID = "node2";
1300
1301         final PeerAddressResolver peerAddressResolver = peerId -> peerId.equals(node1ID)
1302                 ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID)
1303                         ? actorFactory.createTestActorPath(node2ID) : null;
1304
1305         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1306         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1307         configParams.setElectionTimeoutFactor(3);
1308         configParams.setPeerAddressResolver(peerAddressResolver);
1309
1310         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1311                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, false)));
1312         SimpleReplicatedLogEntry persistedServerConfigEntry = new SimpleReplicatedLogEntry(0, 1, persistedServerConfig);
1313
1314         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1315         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1316         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1317         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1318         InMemoryJournal.addEntry(node2ID, 3, new SimpleReplicatedLogEntry(1, 1,
1319                 new MockRaftActorContext.MockPayload("2")));
1320         InMemoryJournal.addEntry(node2ID, 4, new ApplyJournalEntries(1));
1321
1322         ActorRef node1Collector = actorFactory.createActor(
1323                 MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
1324         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1325                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1326                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1327         final CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1328
1329         ActorRef node2Collector = actorFactory.createActor(
1330                 MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
1331         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1332                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1333                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1334         final CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1335
1336         // Send a ChangeServersVotingStatus message to node1 to change mode1 to voting. This should cause
1337         // node1 to try to elect itself as leader in order to apply the new server config. However node1's log
1338         // is behind node2's so node2 should not grant node1's vote. This should cause node1 to time out and
1339         // forward the request to node2.
1340
1341         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(
1342                 ImmutableMap.of(node1ID, true, node2ID, true));
1343         node1RaftActorRef.tell(changeServers, testKit.getRef());
1344         ServerChangeReply reply = testKit.expectMsgClass(Duration.ofSeconds(5), ServerChangeReply.class);
1345         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1346
1347         MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1348         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1349                 votingServer(node1ID), votingServer(node2ID));
1350         assertEquals("getRaftState", RaftState.Leader, node2RaftActor.getRaftState());
1351
1352         MessageCollectorActor.expectFirstMatching(node1Collector, ApplyJournalEntries.class);
1353         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1354                 votingServer(node1ID), votingServer(node2ID));
1355         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1356         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1357
1358         LOG.info("testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout ending");
1359     }
1360
1361     @Test
1362     public void testChangeToVotingWithNoLeaderAndOtherLeaderElected() {
1363         LOG.info("testChangeToVotingWithNoLeaderAndOtherLeaderElected starting");
1364
1365         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1366         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1367         configParams.setElectionTimeoutFactor(100000);
1368
1369         final String node1ID = "node1";
1370         final String node2ID = "node2";
1371
1372         configParams.setPeerAddressResolver(peerId -> peerId.equals(node1ID)
1373                 ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID)
1374                         ? actorFactory.createTestActorPath(node2ID) : null);
1375
1376         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1377                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, true)));
1378         SimpleReplicatedLogEntry persistedServerConfigEntry = new SimpleReplicatedLogEntry(0, 1, persistedServerConfig);
1379
1380         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1381         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1382         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1383         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1384
1385         ActorRef node1Collector = actorFactory.createActor(
1386                 MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
1387         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1388                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1389                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1390         final CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1391
1392         ActorRef node2Collector = actorFactory.createActor(
1393                 MessageCollectorActor.props(), actorFactory.generateActorId("collector"));
1394         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1395                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1396                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1397         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1398
1399         // Send a ChangeServersVotingStatus message to node1 to change node1 to voting. This should cause
1400         // node1 to try to elect itself as leader in order to apply the new server config. But we'll drop
1401         // RequestVote messages in node2 and make it the leader so node1 should forward the server change
1402         // request to node2 when node2 is elected.
1403
1404         node2RaftActor.setDropMessageOfType(RequestVote.class);
1405
1406         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true,
1407                 node2ID, true));
1408         node1RaftActorRef.tell(changeServers, testKit.getRef());
1409
1410         MessageCollectorActor.expectFirstMatching(node2Collector, RequestVote.class);
1411
1412         node2RaftActorRef.tell(TimeoutNow.INSTANCE, ActorRef.noSender());
1413
1414         ServerChangeReply reply = testKit.expectMsgClass(Duration.ofSeconds(5), ServerChangeReply.class);
1415         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1416
1417         MessageCollectorActor.expectFirstMatching(node1Collector, ApplyJournalEntries.class);
1418         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1419                 votingServer(node1ID), votingServer(node2ID));
1420         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1421         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1422
1423         MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1424         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1425                 votingServer(node1ID), votingServer(node2ID));
1426         assertEquals("getRaftState", RaftState.Leader, node2RaftActor.getRaftState());
1427
1428         LOG.info("testChangeToVotingWithNoLeaderAndOtherLeaderElected ending");
1429     }
1430
1431     private static void verifyRaftState(final RaftState expState, final RaftActor... raftActors) {
1432         Stopwatch sw = Stopwatch.createStarted();
1433         while (sw.elapsed(TimeUnit.SECONDS) <= 5) {
1434             for (RaftActor raftActor : raftActors) {
1435                 if (raftActor.getRaftState() == expState) {
1436                     return;
1437                 }
1438             }
1439         }
1440
1441         fail("None of the RaftActors have state " + expState);
1442     }
1443
1444     private static ServerInfo votingServer(final String id) {
1445         return new ServerInfo(id, true);
1446     }
1447
1448     private static ServerInfo nonVotingServer(final String id) {
1449         return new ServerInfo(id, false);
1450     }
1451
1452     private ActorRef newLeaderCollectorActor(final MockLeaderRaftActor leaderRaftActor) {
1453         return newCollectorActor(leaderRaftActor, LEADER_ID);
1454     }
1455
1456     private ActorRef newCollectorActor(final AbstractMockRaftActor raftActor, final String id) {
1457         ActorRef collectorActor = actorFactory.createTestActor(
1458                 MessageCollectorActor.props(), actorFactory.generateActorId(id + "Collector"));
1459         raftActor.setCollectorActor(collectorActor);
1460         return collectorActor;
1461     }
1462
1463     private static void verifyServerConfigurationPayloadEntry(final ReplicatedLog log, final ServerInfo... expected) {
1464         ReplicatedLogEntry logEntry = log.get(log.lastIndex());
1465         assertEquals("Last log entry payload class", ServerConfigurationPayload.class, logEntry.getData().getClass());
1466         ServerConfigurationPayload payload = (ServerConfigurationPayload)logEntry.getData();
1467         assertEquals("Server config", ImmutableSet.copyOf(expected), new HashSet<>(payload.getServerConfig()));
1468     }
1469
1470     private static RaftActorContextImpl newFollowerContext(final String id,
1471             final TestActorRef<? extends AbstractActor> actor) {
1472         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1473         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1474         configParams.setElectionTimeoutFactor(100000);
1475         NonPersistentDataProvider noPersistence = new NonPersistentDataProvider(Runnable::run);
1476         ElectionTermImpl termInfo = new ElectionTermImpl(noPersistence, id, LOG);
1477         termInfo.update(1, LEADER_ID);
1478         return new RaftActorContextImpl(actor, actor.underlyingActor().getContext(),
1479                 id, termInfo, -1, -1, ImmutableMap.of(LEADER_ID, ""), configParams,
1480                 noPersistence, applyState -> actor.tell(applyState, actor), LOG,  MoreExecutors.directExecutor());
1481     }
1482
1483     abstract static class AbstractMockRaftActor extends MockRaftActor {
1484         private volatile ActorRef collectorActor;
1485         private volatile Class<?> dropMessageOfType;
1486
1487         AbstractMockRaftActor(final String id, final Map<String, String> peerAddresses,
1488                 final Optional<ConfigParams> config, final boolean persistent, final ActorRef collectorActor) {
1489             super(builder().id(id).peerAddresses(peerAddresses).config(config.get())
1490                     .persistent(Optional.of(persistent)));
1491             this.collectorActor = collectorActor;
1492         }
1493
1494         void setDropMessageOfType(final Class<?> dropMessageOfType) {
1495             this.dropMessageOfType = dropMessageOfType;
1496         }
1497
1498         void setCollectorActor(final ActorRef collectorActor) {
1499             this.collectorActor = collectorActor;
1500         }
1501
1502         @Override
1503         public void handleCommand(final Object message) {
1504             if (dropMessageOfType == null || !dropMessageOfType.equals(message.getClass())) {
1505                 super.handleCommand(message);
1506             }
1507
1508             if (collectorActor != null) {
1509                 collectorActor.tell(message, getSender());
1510             }
1511         }
1512     }
1513
1514     public static class CollectingMockRaftActor extends AbstractMockRaftActor {
1515
1516         CollectingMockRaftActor(final String id, final Map<String, String> peerAddresses,
1517                 final Optional<ConfigParams> config, final boolean persistent, final ActorRef collectorActor) {
1518             super(id, peerAddresses, config, persistent, collectorActor);
1519             snapshotCohortDelegate = new RaftActorSnapshotCohort() {
1520                 @Override
1521                 public void createSnapshot(final ActorRef actorRef,
1522                         final Optional<OutputStream> installSnapshotStream) {
1523                     actorRef.tell(new CaptureSnapshotReply(ByteState.empty(), installSnapshotStream), actorRef);
1524                 }
1525
1526                 @Override
1527                 public void applySnapshot(
1528                         final org.opendaylight.controller.cluster.raft.persisted.Snapshot.State snapshotState) {
1529                 }
1530
1531                 @Override
1532                 public org.opendaylight.controller.cluster.raft.persisted.Snapshot.State deserializeSnapshot(
1533                         final ByteSource snapshotBytes) {
1534                     throw new UnsupportedOperationException();
1535                 }
1536             };
1537         }
1538
1539         public static Props props(final String id, final Map<String, String> peerAddresses,
1540                 final ConfigParams config, final boolean persistent, final ActorRef collectorActor) {
1541
1542             return Props.create(CollectingMockRaftActor.class, id, peerAddresses, Optional.of(config),
1543                     persistent, collectorActor);
1544         }
1545
1546     }
1547
1548     public static class MockLeaderRaftActor extends AbstractMockRaftActor {
1549         public MockLeaderRaftActor(final Map<String, String> peerAddresses, final ConfigParams config,
1550                 final RaftActorContext fromContext) {
1551             super(LEADER_ID, peerAddresses, Optional.of(config), NO_PERSISTENCE, null);
1552             setPersistence(false);
1553
1554             RaftActorContext context = getRaftActorContext();
1555             for (int i = 0; i < fromContext.getReplicatedLog().size(); i++) {
1556                 ReplicatedLogEntry entry = fromContext.getReplicatedLog().get(i);
1557                 getState().add(entry.getData());
1558                 context.getReplicatedLog().append(entry);
1559             }
1560
1561             context.setCommitIndex(fromContext.getCommitIndex());
1562             context.setLastApplied(fromContext.getLastApplied());
1563             context.getTermInformation().update(fromContext.getTermInformation().getCurrentTerm(),
1564                     fromContext.getTermInformation().getVotedFor());
1565         }
1566
1567         @Override
1568         protected void initializeBehavior() {
1569             changeCurrentBehavior(new Leader(getRaftActorContext()));
1570             initializeBehaviorComplete.countDown();
1571         }
1572
1573         @Override
1574         @SuppressWarnings("checkstyle:IllegalCatch")
1575         public void createSnapshot(final ActorRef actorRef, final Optional<OutputStream> installSnapshotStream) {
1576             MockSnapshotState snapshotState = new MockSnapshotState(new ArrayList<>(getState()));
1577             if (installSnapshotStream.isPresent()) {
1578                 SerializationUtils.serialize(snapshotState, installSnapshotStream.get());
1579             }
1580
1581             actorRef.tell(new CaptureSnapshotReply(snapshotState, installSnapshotStream), actorRef);
1582         }
1583
1584         static Props props(final Map<String, String> peerAddresses, final RaftActorContext fromContext) {
1585             DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1586             configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1587             configParams.setElectionTimeoutFactor(10);
1588             return Props.create(MockLeaderRaftActor.class, peerAddresses, configParams, fromContext);
1589         }
1590     }
1591
1592     public static class MockNewFollowerRaftActor extends AbstractMockRaftActor {
1593         public MockNewFollowerRaftActor(final ConfigParams config, final ActorRef collectorActor) {
1594             super(NEW_SERVER_ID, new HashMap<>(), Optional.of(config), NO_PERSISTENCE, collectorActor);
1595             setPersistence(false);
1596         }
1597
1598         static Props props(final ConfigParams config, final ActorRef collectorActor) {
1599             return Props.create(MockNewFollowerRaftActor.class, config, collectorActor);
1600         }
1601     }
1602 }