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