opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/RaftActorServerConfigurationSupportTest.java

   1 /*
   2  * Copyright (c) 2015 Brocade Communications Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.cluster.raft;
   9
  10 import static org.junit.Assert.assertEquals;
  11 import static org.junit.Assert.assertTrue;
  12 import static org.junit.Assert.fail;
  13 import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.assertNoneMatching;
  14 import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.clearMessages;
  15 import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.expectFirstMatching;
  16 import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.expectMatching;
  17
  18 import akka.actor.ActorRef;
  19 import akka.actor.Props;
  20 import akka.actor.UntypedActor;
  21 import akka.dispatch.Dispatchers;
  22 import akka.testkit.JavaTestKit;
  23 import akka.testkit.TestActorRef;
  24 import com.google.common.base.Optional;
  25 import com.google.common.base.Stopwatch;
  26 import com.google.common.collect.ImmutableMap;
  27 import com.google.common.collect.Maps;
  28 import com.google.common.collect.Sets;
  29 import java.util.Arrays;
  30 import java.util.Collections;
  31 import java.util.List;
  32 import java.util.Map;
  33 import java.util.concurrent.TimeUnit;
  34 import org.junit.After;
  35 import org.junit.Before;
  36 import org.junit.Test;
  37 import org.opendaylight.controller.cluster.NonPersistentDataProvider;
  38 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
  39 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
  40 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  41 import org.opendaylight.controller.cluster.raft.base.messages.ElectionTimeout;
  42 import org.opendaylight.controller.cluster.raft.base.messages.InitiateCaptureSnapshot;
  43 import org.opendaylight.controller.cluster.raft.base.messages.TimeoutNow;
  44 import org.opendaylight.controller.cluster.raft.behaviors.AbstractLeader;
  45 import org.opendaylight.controller.cluster.raft.behaviors.Follower;
  46 import org.opendaylight.controller.cluster.raft.behaviors.Leader;
  47 import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
  48 import org.opendaylight.controller.cluster.raft.messages.AddServer;
  49 import org.opendaylight.controller.cluster.raft.messages.AddServerReply;
  50 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
  51 import org.opendaylight.controller.cluster.raft.messages.ChangeServersVotingStatus;
  52 import org.opendaylight.controller.cluster.raft.messages.InstallSnapshot;
  53 import org.opendaylight.controller.cluster.raft.messages.RemoveServer;
  54 import org.opendaylight.controller.cluster.raft.messages.RemoveServerReply;
  55 import org.opendaylight.controller.cluster.raft.messages.RequestVote;
  56 import org.opendaylight.controller.cluster.raft.messages.ServerChangeReply;
  57 import org.opendaylight.controller.cluster.raft.messages.ServerChangeStatus;
  58 import org.opendaylight.controller.cluster.raft.messages.ServerRemoved;
  59 import org.opendaylight.controller.cluster.raft.messages.UnInitializedFollowerSnapshotReply;
  60 import org.opendaylight.controller.cluster.raft.persisted.ApplyJournalEntries;
  61 import org.opendaylight.controller.cluster.raft.persisted.ServerConfigurationPayload;
  62 import org.opendaylight.controller.cluster.raft.persisted.ServerInfo;
  63 import org.opendaylight.controller.cluster.raft.persisted.UpdateElectionTerm;
  64 import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
  65 import org.opendaylight.controller.cluster.raft.utils.ForwardMessageToBehaviorActor;
  66 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  67 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  68 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  69 import org.slf4j.Logger;
  70 import org.slf4j.LoggerFactory;
  71 import scala.concurrent.duration.FiniteDuration;
  72
  73 /**
  74  * Unit tests for RaftActorServerConfigurationSupport.
  75  *
  76  * @author Thomas Pantelis
  77  */
  78 public class RaftActorServerConfigurationSupportTest extends AbstractActorTest {
  79     static final String LEADER_ID = "leader";
  80     static final String FOLLOWER_ID = "follower";
  81     static final String FOLLOWER_ID2 = "follower2";
  82     static final String NEW_SERVER_ID = "new-server";
  83     static final String NEW_SERVER_ID2 = "new-server2";
  84     private static final Logger LOG = LoggerFactory.getLogger(RaftActorServerConfigurationSupportTest.class);
  85     private static final Class<?> COMMIT_MESSAGE_CLASS = RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT.getClass();
  86     private static final boolean NO_PERSISTENCE = false;
  87     private static final boolean PERSISTENT = true;
  88
  89     private final TestActorFactory actorFactory = new TestActorFactory(getSystem());
  90
  91     private final TestActorRef<ForwardMessageToBehaviorActor> followerActor = actorFactory.createTestActor(
  92             Props.create(ForwardMessageToBehaviorActor.class).withDispatcher(Dispatchers.DefaultDispatcherId()),
  93             actorFactory.generateActorId(FOLLOWER_ID));
  94
  95     private TestActorRef<MockNewFollowerRaftActor> newFollowerRaftActor;
  96     private TestActorRef<MessageCollectorActor> newFollowerCollectorActor;
  97     private RaftActorContext newFollowerActorContext;
  98
  99     private final JavaTestKit testKit = new JavaTestKit(getSystem());
 100
 101     @Before
 102     public void setup() {
 103         InMemoryJournal.clear();
 104         InMemorySnapshotStore.clear();
 105     }
 106
 107     @SuppressWarnings("checkstyle:IllegalCatch")
 108     private void setupNewFollower() {
 109         DefaultConfigParamsImpl configParams = newFollowerConfigParams();
 110
 111         newFollowerCollectorActor = actorFactory.createTestActor(
 112                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 113                 actorFactory.generateActorId(NEW_SERVER_ID + "Collector"));
 114         newFollowerRaftActor = actorFactory.createTestActor(MockNewFollowerRaftActor.props(
 115                 configParams, newFollowerCollectorActor).withDispatcher(Dispatchers.DefaultDispatcherId()),
 116                 actorFactory.generateActorId(NEW_SERVER_ID));
 117
 118         try {
 119             newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext();
 120         } catch (Exception e) {
 121             newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext();
 122         }
 123     }
 124
 125     private static DefaultConfigParamsImpl newFollowerConfigParams() {
 126         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 127         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 128         configParams.setElectionTimeoutFactor(100000);
 129         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 130         return configParams;
 131     }
 132
 133     @After
 134     public void tearDown() throws Exception {
 135         actorFactory.close();
 136     }
 137
 138     @Test
 139     public void testAddServerWithExistingFollower() throws Exception {
 140         LOG.info("testAddServerWithExistingFollower starting");
 141         setupNewFollower();
 142         RaftActorContextImpl followerActorContext = newFollowerContext(FOLLOWER_ID, followerActor);
 143         followerActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 144                 0, 3, 1).build());
 145         followerActorContext.setCommitIndex(2);
 146         followerActorContext.setLastApplied(2);
 147
 148         Follower follower = new Follower(followerActorContext);
 149         followerActor.underlyingActor().setBehavior(follower);
 150         followerActorContext.setCurrentBehavior(follower);
 151
 152         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 153                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 154                         followerActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 155                 actorFactory.generateActorId(LEADER_ID));
 156
 157         // Expect initial heartbeat from the leader.
 158         expectFirstMatching(followerActor, AppendEntries.class);
 159         clearMessages(followerActor);
 160
 161         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 162         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 163
 164         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 165
 166         // Leader should install snapshot - capture and verify ApplySnapshot contents
 167
 168         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 169         @SuppressWarnings("unchecked")
 170         List<Object> snapshotState = (List<Object>) MockRaftActor.toObject(applySnapshot.getSnapshot().getState());
 171         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 172
 173         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 174         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 175         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 176
 177         // Verify ServerConfigurationPayload entry in leader's log
 178
 179         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 180         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 181         assertEquals("Leader journal last index", 3, leaderActorContext.getReplicatedLog().lastIndex());
 182         assertEquals("Leader commit index", 3, leaderActorContext.getCommitIndex());
 183         assertEquals("Leader last applied index", 3, leaderActorContext.getLastApplied());
 184         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 185                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 186
 187         // Verify ServerConfigurationPayload entry in both followers
 188
 189         expectFirstMatching(followerActor, ApplyState.class);
 190         assertEquals("Follower journal last index", 3, followerActorContext.getReplicatedLog().lastIndex());
 191         verifyServerConfigurationPayloadEntry(followerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 192                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 193
 194         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 195         assertEquals("New follower journal last index", 3, newFollowerActorContext.getReplicatedLog().lastIndex());
 196         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 197                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 198
 199         // Verify new server config was applied in both followers
 200
 201         assertEquals("Follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID), followerActorContext.getPeerIds());
 202
 203         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, FOLLOWER_ID),
 204                 newFollowerActorContext.getPeerIds());
 205
 206         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 207         expectFirstMatching(followerActor, ApplyState.class);
 208
 209         assertEquals("Follower commit index", 3, followerActorContext.getCommitIndex());
 210         assertEquals("Follower last applied index", 3, followerActorContext.getLastApplied());
 211         assertEquals("New follower commit index", 3, newFollowerActorContext.getCommitIndex());
 212         assertEquals("New follower last applied index", 3, newFollowerActorContext.getLastApplied());
 213
 214         assertEquals("Leader persisted ReplicatedLogImplEntry entries", 0,
 215                 InMemoryJournal.get(LEADER_ID, ReplicatedLogImplEntry.class).size());
 216         assertEquals("Leader persisted ServerConfigurationPayload entries", 1,
 217                 InMemoryJournal.get(LEADER_ID, ServerConfigurationPayload.class).size());
 218
 219         assertEquals("New follower persisted ReplicatedLogImplEntry entries", 0,
 220                 InMemoryJournal.get(NEW_SERVER_ID, ReplicatedLogImplEntry.class).size());
 221         assertEquals("New follower persisted ServerConfigurationPayload entries", 1,
 222                 InMemoryJournal.get(NEW_SERVER_ID, ServerConfigurationPayload.class).size());
 223
 224         LOG.info("testAddServerWithExistingFollower ending");
 225     }
 226
 227     @Test
 228     public void testAddServerWithNoExistingFollower() throws Exception {
 229         LOG.info("testAddServerWithNoExistingFollower starting");
 230
 231         setupNewFollower();
 232         RaftActorContext initialActorContext = new MockRaftActorContext();
 233         initialActorContext.setCommitIndex(1);
 234         initialActorContext.setLastApplied(1);
 235         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 236                 0, 2, 1).build());
 237
 238         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 239                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 240                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 241                 actorFactory.generateActorId(LEADER_ID));
 242
 243         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 244         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 245
 246         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 247
 248         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 249
 250         // Leader should install snapshot - capture and verify ApplySnapshot contents
 251
 252         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 253         @SuppressWarnings("unchecked")
 254         List<Object> snapshotState = (List<Object>) MockRaftActor.toObject(applySnapshot.getSnapshot().getState());
 255         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 256
 257         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 258         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 259         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 260
 261         // Verify ServerConfigurationPayload entry in leader's log
 262
 263         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 264         assertEquals("Leader journal last index", 2, leaderActorContext.getReplicatedLog().lastIndex());
 265         assertEquals("Leader commit index", 2, leaderActorContext.getCommitIndex());
 266         assertEquals("Leader last applied index", 2, leaderActorContext.getLastApplied());
 267         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 268                 votingServer(NEW_SERVER_ID));
 269
 270         // Verify ServerConfigurationPayload entry in the new follower
 271
 272         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 273         assertEquals("New follower journal last index", 2, newFollowerActorContext.getReplicatedLog().lastIndex());
 274         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 275                 votingServer(NEW_SERVER_ID));
 276
 277         // Verify new server config was applied in the new follower
 278
 279         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID), newFollowerActorContext.getPeerIds());
 280
 281         LOG.info("testAddServerWithNoExistingFollower ending");
 282     }
 283
 284     @Test
 285     public void testAddServersAsNonVoting() throws Exception {
 286         LOG.info("testAddServersAsNonVoting starting");
 287
 288         setupNewFollower();
 289         RaftActorContext initialActorContext = new MockRaftActorContext();
 290
 291         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 292                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 293                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 294                 actorFactory.generateActorId(LEADER_ID));
 295
 296         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 297         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 298
 299         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 300
 301         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), false), testKit.getRef());
 302
 303         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 304         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 305         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 306
 307         // Verify ServerConfigurationPayload entry in leader's log
 308
 309         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 310
 311         assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex());
 312         assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex());
 313         assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied());
 314         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 315                 nonVotingServer(NEW_SERVER_ID));
 316
 317         // Verify ServerConfigurationPayload entry in the new follower
 318
 319         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 320         assertEquals("New follower journal last index", 0, newFollowerActorContext.getReplicatedLog().lastIndex());
 321         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 322                 nonVotingServer(NEW_SERVER_ID));
 323
 324         // Verify new server config was applied in the new follower
 325
 326         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID), newFollowerActorContext.getPeerIds());
 327
 328         assertNoneMatching(newFollowerCollectorActor, InstallSnapshot.class, 500);
 329
 330         // Add another non-voting server.
 331
 332         clearMessages(leaderCollectorActor);
 333
 334         RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor);
 335         Follower newFollower2 = new Follower(follower2ActorContext);
 336         followerActor.underlyingActor().setBehavior(newFollower2);
 337
 338         leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit.getRef());
 339
 340         addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 341         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 342         assertEquals("getLeaderHint", java.util.Optional.of(LEADER_ID), addServerReply.getLeaderHint());
 343
 344         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 345         assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex());
 346         assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex());
 347         assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied());
 348         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(),
 349                 votingServer(LEADER_ID), nonVotingServer(NEW_SERVER_ID), nonVotingServer(NEW_SERVER_ID2));
 350
 351         LOG.info("testAddServersAsNonVoting ending");
 352     }
 353
 354     @Test
 355     public void testAddServerWithOperationInProgress() throws Exception {
 356         LOG.info("testAddServerWithOperationInProgress starting");
 357
 358         setupNewFollower();
 359         RaftActorContext initialActorContext = new MockRaftActorContext();
 360
 361         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 362                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 363                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 364                 actorFactory.generateActorId(LEADER_ID));
 365
 366         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 367         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 368
 369         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 370
 371         RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor);
 372         Follower newFollower2 = new Follower(follower2ActorContext);
 373         followerActor.underlyingActor().setBehavior(newFollower2);
 374
 375         MockNewFollowerRaftActor newFollowerRaftActorInstance = newFollowerRaftActor.underlyingActor();
 376         newFollowerRaftActorInstance.setDropMessageOfType(InstallSnapshot.class);
 377
 378         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 379
 380         // Wait for leader's install snapshot and capture it
 381
 382         InstallSnapshot installSnapshot = expectFirstMatching(newFollowerCollectorActor, InstallSnapshot.class);
 383
 384         // Send a second AddServer - should get queued
 385         JavaTestKit testKit2 = new JavaTestKit(getSystem());
 386         leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit2.getRef());
 387
 388         // Continue the first AddServer
 389         newFollowerRaftActorInstance.setDropMessageOfType(null);
 390         newFollowerRaftActor.tell(installSnapshot, leaderActor);
 391
 392         // Verify both complete successfully
 393         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 394         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 395
 396         addServerReply = testKit2.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 397         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 398
 399         // Verify ServerConfigurationPayload entries in leader's log
 400
 401         expectMatching(leaderCollectorActor, ApplyState.class, 2);
 402         assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex());
 403         assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex());
 404         assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied());
 405         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(),
 406                 votingServer(LEADER_ID), votingServer(NEW_SERVER_ID), nonVotingServer(NEW_SERVER_ID2));
 407
 408         // Verify ServerConfigurationPayload entry in the new follower
 409
 410         expectMatching(newFollowerCollectorActor, ApplyState.class, 2);
 411         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID2),
 412                newFollowerActorContext.getPeerIds());
 413
 414         LOG.info("testAddServerWithOperationInProgress ending");
 415     }
 416
 417     @Test
 418     public void testAddServerWithPriorSnapshotInProgress() throws Exception {
 419         LOG.info("testAddServerWithPriorSnapshotInProgress starting");
 420
 421         setupNewFollower();
 422         RaftActorContext initialActorContext = new MockRaftActorContext();
 423
 424         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 425                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 426                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 427                 actorFactory.generateActorId(LEADER_ID));
 428
 429         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 430         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 431
 432         TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 433
 434         // Drop commit message for now to delay snapshot completion
 435         leaderRaftActor.setDropMessageOfType(String.class);
 436
 437         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 438
 439         Object commitMsg = expectFirstMatching(leaderCollectorActor, COMMIT_MESSAGE_CLASS);
 440
 441         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 442
 443         leaderRaftActor.setDropMessageOfType(null);
 444         leaderActor.tell(commitMsg, leaderActor);
 445
 446         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 447         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 448         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 449
 450         expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 451
 452         // Verify ServerConfigurationPayload entry in leader's log
 453
 454         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 455         assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex());
 456         assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex());
 457         assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied());
 458         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 459                 votingServer(NEW_SERVER_ID));
 460
 461         LOG.info("testAddServerWithPriorSnapshotInProgress ending");
 462     }
 463
 464     @Test
 465     public void testAddServerWithPriorSnapshotCompleteTimeout() throws Exception {
 466         LOG.info("testAddServerWithPriorSnapshotCompleteTimeout starting");
 467
 468         setupNewFollower();
 469         RaftActorContext initialActorContext = new MockRaftActorContext();
 470
 471         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 472                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 473                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 474                 actorFactory.generateActorId(LEADER_ID));
 475
 476         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 477         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 478
 479         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(1);
 480
 481         // Drop commit message so the snapshot doesn't complete.
 482         leaderRaftActor.setDropMessageOfType(COMMIT_MESSAGE_CLASS);
 483
 484         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 485
 486         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 487
 488         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 489         assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus());
 490
 491         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 492
 493         LOG.info("testAddServerWithPriorSnapshotCompleteTimeout ending");
 494     }
 495
 496     @Test
 497     public void testAddServerWithLeaderChangeBeforePriorSnapshotComplete() throws Exception {
 498         LOG.info("testAddServerWithLeaderChangeBeforePriorSnapshotComplete starting");
 499
 500         setupNewFollower();
 501         RaftActorContext initialActorContext = new MockRaftActorContext();
 502
 503         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 504                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 505                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 506                 actorFactory.generateActorId(LEADER_ID));
 507
 508         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 509         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 510         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(100);
 511
 512         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 513
 514         // Drop the commit message so the snapshot doesn't complete yet.
 515         leaderRaftActor.setDropMessageOfType(COMMIT_MESSAGE_CLASS);
 516
 517         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 518
 519         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 520
 521         Object commitMsg = expectFirstMatching(leaderCollectorActor, COMMIT_MESSAGE_CLASS);
 522
 523         // Change the leader behavior to follower
 524         leaderActor.tell(new Follower(leaderActorContext), leaderActor);
 525
 526         // Drop CaptureSnapshotReply in case install snapshot is incorrectly initiated after the prior
 527         // snapshot completes. This will prevent the invalid snapshot from completing and fail the
 528         // isCapturing assertion below.
 529         leaderRaftActor.setDropMessageOfType(CaptureSnapshotReply.class);
 530
 531         // Complete the prior snapshot - this should be a no-op b/c it's no longer the leader
 532         leaderActor.tell(commitMsg, leaderActor);
 533
 534         leaderActor.tell(new RaftActorServerConfigurationSupport.ServerOperationTimeout(NEW_SERVER_ID), leaderActor);
 535
 536         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 537         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 538
 539         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 540         assertEquals("isCapturing", false, leaderActorContext.getSnapshotManager().isCapturing());
 541
 542         LOG.info("testAddServerWithLeaderChangeBeforePriorSnapshotComplete ending");
 543     }
 544
 545     @Test
 546     public void testAddServerWithLeaderChangeDuringInstallSnapshot() throws Exception {
 547         LOG.info("testAddServerWithLeaderChangeDuringInstallSnapshot starting");
 548
 549         setupNewFollower();
 550         RaftActorContext initialActorContext = new MockRaftActorContext();
 551
 552         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 553                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 554                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 555                 actorFactory.generateActorId(LEADER_ID));
 556
 557         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 558         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 559
 560         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(8);
 561
 562         TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 563
 564         // Drop the UnInitializedFollowerSnapshotReply to delay it.
 565         leaderRaftActor.setDropMessageOfType(UnInitializedFollowerSnapshotReply.class);
 566
 567         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 568
 569         final UnInitializedFollowerSnapshotReply snapshotReply = expectFirstMatching(leaderCollectorActor,
 570                 UnInitializedFollowerSnapshotReply.class);
 571
 572         // Prevent election timeout when the leader switches to follower
 573         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(100);
 574
 575         // Change the leader behavior to follower
 576         leaderActor.tell(new Follower(leaderActorContext), leaderActor);
 577
 578         // Send the captured UnInitializedFollowerSnapshotReply - should be a no-op
 579         leaderRaftActor.setDropMessageOfType(null);
 580         leaderActor.tell(snapshotReply, leaderActor);
 581
 582         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 583         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 584
 585         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 586
 587         LOG.info("testAddServerWithLeaderChangeDuringInstallSnapshot ending");
 588     }
 589
 590     @Test
 591     public void testAddServerWithInstallSnapshotTimeout() throws Exception {
 592         LOG.info("testAddServerWithInstallSnapshotTimeout starting");
 593
 594         setupNewFollower();
 595         RaftActorContext initialActorContext = new MockRaftActorContext();
 596
 597         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 598                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 599                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 600                 actorFactory.generateActorId(LEADER_ID));
 601
 602         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 603         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 604         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(1);
 605
 606         // Drop the InstallSnapshot message so it times out
 607         newFollowerRaftActor.underlyingActor().setDropMessageOfType(InstallSnapshot.class);
 608
 609         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 610
 611         leaderActor.tell(new UnInitializedFollowerSnapshotReply("bogus"), leaderActor);
 612
 613         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 614         assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus());
 615
 616         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 617         assertEquals("Leader followers size", 0,
 618                 ((AbstractLeader)leaderRaftActor.getCurrentBehavior()).getFollowerIds().size());
 619
 620         LOG.info("testAddServerWithInstallSnapshotTimeout ending");
 621     }
 622
 623     @Test
 624     public void testAddServerWithNoLeader() {
 625         LOG.info("testAddServerWithNoLeader starting");
 626
 627         setupNewFollower();
 628         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 629         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 630
 631         TestActorRef<MockRaftActor> noLeaderActor = actorFactory.createTestActor(
 632                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 633                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false))
 634                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 635                 actorFactory.generateActorId(LEADER_ID));
 636         noLeaderActor.underlyingActor().waitForInitializeBehaviorComplete();
 637
 638         noLeaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true),
 639                 testKit.getRef());
 640         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 641         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 642
 643         LOG.info("testAddServerWithNoLeader ending");
 644     }
 645
 646     @Test
 647     public void testAddServerWithNoConsensusReached() {
 648         LOG.info("testAddServerWithNoConsensusReached starting");
 649
 650         setupNewFollower();
 651         RaftActorContext initialActorContext = new MockRaftActorContext();
 652
 653         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 654                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 655                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 656                 actorFactory.generateActorId(LEADER_ID));
 657
 658         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 659         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 660
 661         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 662
 663         // Drop UnInitializedFollowerSnapshotReply initially
 664         leaderRaftActor.setDropMessageOfType(UnInitializedFollowerSnapshotReply.class);
 665
 666         MockNewFollowerRaftActor newFollowerRaftActorInstance = newFollowerRaftActor.underlyingActor();
 667         newFollowerCollectorActor = newCollectorActor(newFollowerRaftActorInstance, NEW_SERVER_ID);
 668
 669         // Drop AppendEntries to the new follower so consensus isn't reached
 670         newFollowerRaftActorInstance.setDropMessageOfType(AppendEntries.class);
 671
 672         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 673
 674         // Capture the UnInitializedFollowerSnapshotReply
 675         Object snapshotReply = expectFirstMatching(leaderCollectorActor, UnInitializedFollowerSnapshotReply.class);
 676
 677         // Send the UnInitializedFollowerSnapshotReply to resume the first request
 678         leaderRaftActor.setDropMessageOfType(null);
 679         leaderActor.tell(snapshotReply, leaderActor);
 680
 681         expectFirstMatching(newFollowerCollectorActor, AppendEntries.class);
 682
 683         // Send a second AddServer
 684         leaderActor.tell(new AddServer(NEW_SERVER_ID2, "", false), testKit.getRef());
 685
 686         // The first AddServer should succeed with OK even though consensus wasn't reached
 687         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 688         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 689         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 690
 691         // Verify ServerConfigurationPayload entry in leader's log
 692         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 693                 votingServer(NEW_SERVER_ID));
 694
 695         // The second AddServer should fail since consensus wasn't reached for the first
 696         addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 697         assertEquals("getStatus", ServerChangeStatus.PRIOR_REQUEST_CONSENSUS_TIMEOUT, addServerReply.getStatus());
 698
 699         // Re-send the second AddServer - should also fail
 700         leaderActor.tell(new AddServer(NEW_SERVER_ID2, "", false), testKit.getRef());
 701         addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 702         assertEquals("getStatus", ServerChangeStatus.PRIOR_REQUEST_CONSENSUS_TIMEOUT, addServerReply.getStatus());
 703
 704         LOG.info("testAddServerWithNoConsensusReached ending");
 705     }
 706
 707     @Test
 708     public void testAddServerWithExistingServer() {
 709         LOG.info("testAddServerWithExistingServer starting");
 710
 711         RaftActorContext initialActorContext = new MockRaftActorContext();
 712
 713         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 714                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 715                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 716                 actorFactory.generateActorId(LEADER_ID));
 717
 718         leaderActor.tell(new AddServer(FOLLOWER_ID, followerActor.path().toString(), true), testKit.getRef());
 719
 720         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 721         assertEquals("getStatus", ServerChangeStatus.ALREADY_EXISTS, addServerReply.getStatus());
 722
 723         LOG.info("testAddServerWithExistingServer ending");
 724     }
 725
 726     @Test
 727     public void testAddServerForwardedToLeader() {
 728         LOG.info("testAddServerForwardedToLeader starting");
 729
 730         setupNewFollower();
 731         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 732         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 733
 734         TestActorRef<MessageCollectorActor> leaderActor = actorFactory.createTestActor(
 735                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 736                 actorFactory.generateActorId(LEADER_ID));
 737
 738         TestActorRef<MockRaftActor> followerRaftActor = actorFactory.createTestActor(
 739                 MockRaftActor.builder().id(FOLLOWER_ID).peerAddresses(ImmutableMap.of(LEADER_ID,
 740                         leaderActor.path().toString())).config(configParams).persistent(Optional.of(false))
 741                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 742                 actorFactory.generateActorId(FOLLOWER_ID));
 743         followerRaftActor.underlyingActor().waitForInitializeBehaviorComplete();
 744
 745         followerRaftActor.tell(new AppendEntries(1, LEADER_ID, 0, 1, Collections.<ReplicatedLogEntry>emptyList(),
 746                 -1, -1, (short)0), leaderActor);
 747
 748         followerRaftActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true),
 749                 testKit.getRef());
 750         expectFirstMatching(leaderActor, AddServer.class);
 751
 752         LOG.info("testAddServerForwardedToLeader ending");
 753     }
 754
 755     @Test
 756     public void testOnApplyState() {
 757         LOG.info("testOnApplyState starting");
 758
 759         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 760         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 761         TestActorRef<MockRaftActor> noLeaderActor = actorFactory.createTestActor(
 762                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 763                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false))
 764                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 765                 actorFactory.generateActorId(LEADER_ID));
 766
 767         RaftActorServerConfigurationSupport support = new RaftActorServerConfigurationSupport(
 768                 noLeaderActor.underlyingActor());
 769
 770         ReplicatedLogEntry serverConfigEntry = new MockRaftActorContext.MockReplicatedLogEntry(1, 1,
 771                 new ServerConfigurationPayload(Collections.<ServerInfo>emptyList()));
 772         boolean handled = support.handleMessage(new ApplyState(null, null, serverConfigEntry), ActorRef.noSender());
 773         assertEquals("Message handled", true, handled);
 774
 775         ReplicatedLogEntry nonServerConfigEntry = new MockRaftActorContext.MockReplicatedLogEntry(1, 1,
 776                 new MockRaftActorContext.MockPayload("1"));
 777         handled = support.handleMessage(new ApplyState(null, null, nonServerConfigEntry), ActorRef.noSender());
 778         assertEquals("Message handled", false, handled);
 779
 780         LOG.info("testOnApplyState ending");
 781     }
 782
 783     @Test
 784     public void testRemoveServerWithNoLeader() {
 785         LOG.info("testRemoveServerWithNoLeader starting");
 786
 787         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 788         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 789
 790         TestActorRef<MockRaftActor> leaderActor = actorFactory.createTestActor(
 791                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 792                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false))
 793                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 794                 actorFactory.generateActorId(LEADER_ID));
 795         leaderActor.underlyingActor().waitForInitializeBehaviorComplete();
 796
 797         leaderActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef());
 798         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 799                 RemoveServerReply.class);
 800         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, removeServerReply.getStatus());
 801
 802         LOG.info("testRemoveServerWithNoLeader ending");
 803     }
 804
 805     @Test
 806     public void testRemoveServerNonExistentServer() {
 807         LOG.info("testRemoveServerNonExistentServer starting");
 808
 809         RaftActorContext initialActorContext = new MockRaftActorContext();
 810
 811         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 812                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 813                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 814                 actorFactory.generateActorId(LEADER_ID));
 815
 816         leaderActor.tell(new RemoveServer(NEW_SERVER_ID), testKit.getRef());
 817         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 818                 RemoveServerReply.class);
 819         assertEquals("getStatus", ServerChangeStatus.DOES_NOT_EXIST, removeServerReply.getStatus());
 820
 821         LOG.info("testRemoveServerNonExistentServer ending");
 822     }
 823
 824     @Test
 825     public void testRemoveServerForwardToLeader() {
 826         LOG.info("testRemoveServerForwardToLeader starting");
 827
 828         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 829         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 830
 831         TestActorRef<MessageCollectorActor> leaderActor = actorFactory.createTestActor(
 832                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 833                 actorFactory.generateActorId(LEADER_ID));
 834
 835         TestActorRef<MockRaftActor> followerRaftActor = actorFactory.createTestActor(
 836                 MockRaftActor.builder().id(FOLLOWER_ID).peerAddresses(ImmutableMap.of(LEADER_ID,
 837                         leaderActor.path().toString())).config(configParams).persistent(Optional.of(false))
 838                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 839                 actorFactory.generateActorId(FOLLOWER_ID));
 840         followerRaftActor.underlyingActor().waitForInitializeBehaviorComplete();
 841
 842         followerRaftActor.tell(new AppendEntries(1, LEADER_ID, 0, 1, Collections.<ReplicatedLogEntry>emptyList(),
 843                 -1, -1, (short)0), leaderActor);
 844
 845         followerRaftActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef());
 846         expectFirstMatching(leaderActor, RemoveServer.class);
 847
 848         LOG.info("testRemoveServerForwardToLeader ending");
 849     }
 850
 851     @Test
 852     public void testRemoveServer() {
 853         LOG.info("testRemoveServer starting");
 854
 855         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 856         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 857         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 858
 859         final String followerActorId = actorFactory.generateActorId(FOLLOWER_ID);
 860         final String followerActorPath = actorFactory.createTestActorPath(followerActorId);
 861         RaftActorContext initialActorContext = new MockRaftActorContext();
 862
 863         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 864                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActorPath),
 865                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 866                 actorFactory.generateActorId(LEADER_ID));
 867
 868         final TestActorRef<MessageCollectorActor> leaderCollector =
 869                 newLeaderCollectorActor(leaderActor.underlyingActor());
 870
 871         TestActorRef<MessageCollectorActor> collector = actorFactory.createTestActor(MessageCollectorActor.props()
 872                 .withDispatcher(Dispatchers.DefaultDispatcherId()),
 873                         actorFactory.generateActorId("collector"));
 874         actorFactory.createTestActor(
 875                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString()),
 876                         configParams, NO_PERSISTENCE, collector).withDispatcher(Dispatchers.DefaultDispatcherId()),
 877                 followerActorId);
 878
 879         leaderActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef());
 880         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 881                 RemoveServerReply.class);
 882         assertEquals("getStatus", ServerChangeStatus.OK, removeServerReply.getStatus());
 883
 884         final ApplyState applyState = MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
 885         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
 886         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
 887                 votingServer(LEADER_ID));
 888
 889         RaftActorBehavior currentBehavior = leaderActor.underlyingActor().getCurrentBehavior();
 890         assertTrue("Expected Leader", currentBehavior instanceof Leader);
 891         assertEquals("Follower ids size", 0, ((Leader)currentBehavior).getFollowerIds().size());
 892
 893         MessageCollectorActor.expectFirstMatching(collector, ServerRemoved.class);
 894
 895         LOG.info("testRemoveServer ending");
 896     }
 897
 898     @Test
 899     public void testRemoveServerLeader() {
 900         LOG.info("testRemoveServerLeader starting");
 901
 902         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 903         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 904         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 905
 906         final String followerActorId = actorFactory.generateActorId(FOLLOWER_ID);
 907         final String followerActorPath = actorFactory.createTestActorPath(followerActorId);
 908         RaftActorContext initialActorContext = new MockRaftActorContext();
 909
 910         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 911                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActorPath),
 912                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 913                 actorFactory.generateActorId(LEADER_ID));
 914
 915         final TestActorRef<MessageCollectorActor> leaderCollector =
 916                 newLeaderCollectorActor(leaderActor.underlyingActor());
 917
 918         final TestActorRef<MessageCollectorActor> followerCollector =
 919                 actorFactory.createTestActor(MessageCollectorActor.props()
 920                 .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector"));
 921         actorFactory.createTestActor(
 922                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString()),
 923                         configParams, NO_PERSISTENCE, followerCollector)
 924                         .withDispatcher(Dispatchers.DefaultDispatcherId()),
 925                 followerActorId);
 926
 927         leaderActor.tell(new RemoveServer(LEADER_ID), testKit.getRef());
 928         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 929                 RemoveServerReply.class);
 930         assertEquals("getStatus", ServerChangeStatus.OK, removeServerReply.getStatus());
 931
 932         final ApplyState applyState = MessageCollectorActor.expectFirstMatching(followerCollector, ApplyState.class);
 933         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
 934         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
 935                 votingServer(FOLLOWER_ID));
 936
 937         MessageCollectorActor.expectFirstMatching(leaderCollector, ServerRemoved.class);
 938
 939         LOG.info("testRemoveServerLeader ending");
 940     }
 941
 942     @Test
 943     public void testRemoveServerLeaderWithNoFollowers() {
 944         LOG.info("testRemoveServerLeaderWithNoFollowers starting");
 945
 946         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 947                 MockLeaderRaftActor.props(Collections.<String, String>emptyMap(),
 948                         new MockRaftActorContext()).withDispatcher(Dispatchers.DefaultDispatcherId()),
 949                 actorFactory.generateActorId(LEADER_ID));
 950
 951         leaderActor.tell(new RemoveServer(LEADER_ID), testKit.getRef());
 952         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 953                 RemoveServerReply.class);
 954         assertEquals("getStatus", ServerChangeStatus.NOT_SUPPORTED, removeServerReply.getStatus());
 955
 956         LOG.info("testRemoveServerLeaderWithNoFollowers ending");
 957     }
 958
 959     @Test
 960     public void testChangeServersVotingStatus() {
 961         LOG.info("testChangeServersVotingStatus starting");
 962
 963         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 964         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 965         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 966
 967         final String follower1ActorId = actorFactory.generateActorId(FOLLOWER_ID);
 968         final String follower1ActorPath = actorFactory.createTestActorPath(follower1ActorId);
 969         final String follower2ActorId = actorFactory.generateActorId(FOLLOWER_ID2);
 970         final String follower2ActorPath = actorFactory.createTestActorPath(follower2ActorId);
 971
 972         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 973                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, follower1ActorPath,
 974                         FOLLOWER_ID2, follower2ActorPath), new MockRaftActorContext())
 975                         .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
 976         TestActorRef<MessageCollectorActor> leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor());
 977
 978         TestActorRef<MessageCollectorActor> follower1Collector = actorFactory.createTestActor(
 979                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 980                 actorFactory.generateActorId("collector"));
 981         final TestActorRef<CollectingMockRaftActor> follower1RaftActor = actorFactory.createTestActor(
 982                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
 983                         FOLLOWER_ID2, follower2ActorPath), configParams, NO_PERSISTENCE, follower1Collector)
 984                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower1ActorId);
 985
 986         TestActorRef<MessageCollectorActor> follower2Collector = actorFactory.createTestActor(
 987                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 988                 actorFactory.generateActorId("collector"));
 989         final TestActorRef<CollectingMockRaftActor> follower2RaftActor = actorFactory.createTestActor(
 990                 CollectingMockRaftActor.props(FOLLOWER_ID2, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
 991                         FOLLOWER_ID, follower1ActorPath), configParams, NO_PERSISTENCE, follower2Collector)
 992                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower2ActorId);
 993
 994         // Send first ChangeServersVotingStatus message
 995
 996         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(FOLLOWER_ID, false, FOLLOWER_ID2, false)),
 997                 testKit.getRef());
 998         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
 999         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1000
1001         final ApplyState applyState = MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
1002         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
1003         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1004                 votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1005
1006         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
1007         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext()
1008                 .getReplicatedLog(), votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID),
1009                 nonVotingServer(FOLLOWER_ID2));
1010
1011         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1012         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext()
1013                 .getReplicatedLog(), votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID),
1014                 nonVotingServer(FOLLOWER_ID2));
1015
1016         MessageCollectorActor.clearMessages(leaderCollector);
1017         MessageCollectorActor.clearMessages(follower1Collector);
1018         MessageCollectorActor.clearMessages(follower2Collector);
1019
1020         // Send second ChangeServersVotingStatus message
1021
1022         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(FOLLOWER_ID, true)), testKit.getRef());
1023         reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1024         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1025
1026         MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
1027         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1028                 votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1029
1030         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
1031         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext()
1032                 .getReplicatedLog(), votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1033
1034         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1035         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext()
1036                 .getReplicatedLog(), votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1037
1038         LOG.info("testChangeServersVotingStatus ending");
1039     }
1040
1041     @Test
1042     public void testChangeLeaderToNonVoting() {
1043         LOG.info("testChangeLeaderToNonVoting starting");
1044
1045         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1046         configParams.setHeartBeatInterval(new FiniteDuration(500, TimeUnit.MILLISECONDS));
1047
1048         final String follower1ActorId = actorFactory.generateActorId(FOLLOWER_ID);
1049         final String follower1ActorPath = actorFactory.createTestActorPath(follower1ActorId);
1050         final String follower2ActorId = actorFactory.generateActorId(FOLLOWER_ID2);
1051         final String follower2ActorPath = actorFactory.createTestActorPath(follower2ActorId);
1052
1053         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
1054                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, follower1ActorPath,
1055                         FOLLOWER_ID2, follower2ActorPath), new MockRaftActorContext())
1056                         .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
1057         TestActorRef<MessageCollectorActor> leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor());
1058
1059         TestActorRef<MessageCollectorActor> follower1Collector = actorFactory.createTestActor(
1060                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1061                 actorFactory.generateActorId("collector"));
1062         final TestActorRef<CollectingMockRaftActor> follower1RaftActor = actorFactory.createTestActor(
1063                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
1064                         FOLLOWER_ID2, follower2ActorPath), configParams, NO_PERSISTENCE, follower1Collector)
1065                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower1ActorId);
1066
1067         TestActorRef<MessageCollectorActor> follower2Collector = actorFactory.createTestActor(
1068                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1069                 actorFactory.generateActorId("collector"));
1070         final TestActorRef<CollectingMockRaftActor> follower2RaftActor = actorFactory.createTestActor(
1071                 CollectingMockRaftActor.props(FOLLOWER_ID2, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
1072                         FOLLOWER_ID, follower1ActorPath), configParams, NO_PERSISTENCE, follower2Collector)
1073                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower2ActorId);
1074
1075         // Send ChangeServersVotingStatus message
1076
1077         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(LEADER_ID, false)), testKit.getRef());
1078         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1079         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1080
1081         MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
1082         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1083                 nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1084
1085         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
1086         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext()
1087                 .getReplicatedLog(), nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1088
1089         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1090         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext()
1091                 .getReplicatedLog(), nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1092
1093         verifyRaftState(RaftState.Leader, follower1RaftActor.underlyingActor(), follower2RaftActor.underlyingActor());
1094         verifyRaftState(RaftState.Follower, leaderActor.underlyingActor());
1095
1096         MessageCollectorActor.expectMatching(leaderCollector, AppendEntries.class, 2);
1097
1098         LOG.info("testChangeLeaderToNonVoting ending");
1099     }
1100
1101     @Test
1102     public void testChangeLeaderToNonVotingInSingleNode() {
1103         LOG.info("testChangeLeaderToNonVotingInSingleNode starting");
1104
1105         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
1106                 MockLeaderRaftActor.props(ImmutableMap.of(), new MockRaftActorContext())
1107                         .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
1108
1109         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(LEADER_ID, false)), testKit.getRef());
1110         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1111         assertEquals("getStatus", ServerChangeStatus.INVALID_REQUEST, reply.getStatus());
1112
1113         LOG.info("testChangeLeaderToNonVotingInSingleNode ending");
1114     }
1115
1116     @Test
1117     public void testChangeToVotingWithNoLeader() {
1118         LOG.info("testChangeToVotingWithNoLeader starting");
1119
1120         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1121         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1122         configParams.setElectionTimeoutFactor(5);
1123
1124         final String node1ID = "node1";
1125         final String node2ID = "node2";
1126
1127         // Set up a persisted ServerConfigurationPayload. Initially node1 and node2 will come up as non-voting.
1128         // via the server config. The server config will also contain 2 voting peers that are down (ie no
1129         // actors created).
1130
1131         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1132                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, false),
1133                 new ServerInfo("downNode1", true), new ServerInfo("downNode2", true)));
1134         ReplicatedLogImplEntry persistedServerConfigEntry = new ReplicatedLogImplEntry(0, 1, persistedServerConfig);
1135
1136         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "downNode1"));
1137         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1138         InMemoryJournal.addEntry(node1ID, 3, new ApplyJournalEntries(0));
1139         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "downNode2"));
1140         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1141         InMemoryJournal.addEntry(node2ID, 3, new ApplyJournalEntries(0));
1142
1143         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1144                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1145                 actorFactory.generateActorId("collector"));
1146         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1147                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1148                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1149         CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1150
1151         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1152                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1153                 actorFactory.generateActorId("collector"));
1154         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1155                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1156                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1157         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1158
1159         node1RaftActor.waitForInitializeBehaviorComplete();
1160         node2RaftActor.waitForInitializeBehaviorComplete();
1161
1162         // Verify the intended server config was loaded and applied.
1163         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1164                 nonVotingServer(node1ID), nonVotingServer(node2ID), votingServer("downNode1"),
1165                 votingServer("downNode2"));
1166         assertEquals("isVotingMember", false, node1RaftActor.getRaftActorContext().isVotingMember());
1167         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1168         assertEquals("getLeaderId", null, node1RaftActor.getLeaderId());
1169
1170         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1171                 nonVotingServer(node1ID), nonVotingServer(node2ID), votingServer("downNode1"),
1172                 votingServer("downNode2"));
1173         assertEquals("isVotingMember", false, node2RaftActor.getRaftActorContext().isVotingMember());
1174
1175         // For the test, we send a ChangeServersVotingStatus message to node1 to flip the voting states for
1176         // each server, ie node1 and node2 to voting and the 2 down nodes to non-voting. This should cause
1177         // node1 to try to elect itself as leader in order to apply the new server config. Since the 2
1178         // down nodes are switched to non-voting, node1 should only need a vote from node2.
1179
1180         // First send the message such that node1 has no peer address for node2 - should fail.
1181
1182         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true,
1183                 node2ID, true, "downNode1", false, "downNode2", false));
1184         node1RaftActorRef.tell(changeServers, testKit.getRef());
1185         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1186         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, reply.getStatus());
1187
1188         // Send an AppendEntries so node1 has a leaderId
1189
1190         MessageCollectorActor.clearMessages(node1Collector);
1191
1192         long term = node1RaftActor.getRaftActorContext().getTermInformation().getCurrentTerm();
1193         node1RaftActorRef.tell(new AppendEntries(term, "downNode1", -1L, -1L,
1194                 Collections.<ReplicatedLogEntry>emptyList(), 0, -1, (short)1), ActorRef.noSender());
1195
1196         // Wait for the ElectionTimeout to clear the leaderId. he leaderId must be null so on the
1197         // ChangeServersVotingStatus message, it will try to elect a leader.
1198
1199         MessageCollectorActor.expectFirstMatching(node1Collector, ElectionTimeout.class);
1200
1201         // Update node2's peer address and send the message again
1202
1203         node1RaftActor.setPeerAddress(node2ID, node2RaftActorRef.path().toString());
1204
1205         node1RaftActorRef.tell(changeServers, testKit.getRef());
1206         reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1207         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1208
1209         ApplyJournalEntries apply = MessageCollectorActor.expectFirstMatching(node1Collector,
1210                 ApplyJournalEntries.class);
1211         assertEquals("getToIndex", 1, apply.getToIndex());
1212         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1213                 votingServer(node1ID), votingServer(node2ID), nonVotingServer("downNode1"),
1214                 nonVotingServer("downNode2"));
1215         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1216         assertEquals("getRaftState", RaftState.Leader, node1RaftActor.getRaftState());
1217
1218         apply = MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1219         assertEquals("getToIndex", 1, apply.getToIndex());
1220         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1221                 votingServer(node1ID), votingServer(node2ID), nonVotingServer("downNode1"),
1222                 nonVotingServer("downNode2"));
1223         assertEquals("isVotingMember", true, node2RaftActor.getRaftActorContext().isVotingMember());
1224         assertEquals("getRaftState", RaftState.Follower, node2RaftActor.getRaftState());
1225
1226         LOG.info("testChangeToVotingWithNoLeader ending");
1227     }
1228
1229     @Test
1230     public void testChangeToVotingWithNoLeaderAndElectionTimeout() {
1231         LOG.info("testChangeToVotingWithNoLeaderAndElectionTimeout starting");
1232
1233         final String node1ID = "node1";
1234         final String node2ID = "node2";
1235
1236         final PeerAddressResolver peerAddressResolver = peerId -> peerId.equals(node1ID)
1237                 ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID)
1238                         ? actorFactory.createTestActorPath(node2ID) : null;
1239
1240         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1241                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, true)));
1242         ReplicatedLogImplEntry persistedServerConfigEntry = new ReplicatedLogImplEntry(0, 1, persistedServerConfig);
1243
1244         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1245         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1246         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1247         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1248
1249         DefaultConfigParamsImpl configParams1 = new DefaultConfigParamsImpl();
1250         configParams1.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1251         configParams1.setElectionTimeoutFactor(1);
1252         configParams1.setPeerAddressResolver(peerAddressResolver);
1253         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1254                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1255                 actorFactory.generateActorId("collector"));
1256         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1257                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams1,
1258                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1259         final CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1260
1261         DefaultConfigParamsImpl configParams2 = new DefaultConfigParamsImpl();
1262         configParams2.setElectionTimeoutFactor(1000000);
1263         configParams2.setPeerAddressResolver(peerAddressResolver);
1264         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1265                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1266                 actorFactory.generateActorId("collector"));
1267         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1268                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams2,
1269                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1270         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1271
1272         // Send a ChangeServersVotingStatus message to node1 to change mode1 to voting. This should cause
1273         // node1 to try to elect itself as leader in order to apply the new server config. But we'll drop
1274         // RequestVote messages in node2 which should cause node1 to time out and revert back to the previous
1275         // server config and fail with NO_LEADER. Note that node1 shouldn't forward the request to node2 b/c
1276         // node2 was previously voting.
1277
1278         node2RaftActor.setDropMessageOfType(RequestVote.class);
1279
1280         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true));
1281         node1RaftActorRef.tell(changeServers, testKit.getRef());
1282         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1283         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, reply.getStatus());
1284
1285         assertEquals("Server config", Sets.newHashSet(nonVotingServer(node1ID), votingServer(node2ID)),
1286                 Sets.newHashSet(node1RaftActor.getRaftActorContext().getPeerServerInfo(true).getServerConfig()));
1287         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1288
1289         LOG.info("testChangeToVotingWithNoLeaderAndElectionTimeout ending");
1290     }
1291
1292     @Test
1293     public void testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout() {
1294         LOG.info("testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout starting");
1295
1296         final String node1ID = "node1";
1297         final String node2ID = "node2";
1298
1299         final PeerAddressResolver peerAddressResolver = peerId -> peerId.equals(node1ID)
1300                 ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID)
1301                         ? actorFactory.createTestActorPath(node2ID) : null;
1302
1303         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1304         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1305         configParams.setElectionTimeoutFactor(3);
1306         configParams.setPeerAddressResolver(peerAddressResolver);
1307
1308         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1309                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, false)));
1310         ReplicatedLogImplEntry persistedServerConfigEntry = new ReplicatedLogImplEntry(0, 1, persistedServerConfig);
1311
1312         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1313         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1314         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1315         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1316         InMemoryJournal.addEntry(node2ID, 3, new ReplicatedLogImplEntry(1, 1,
1317                 new MockRaftActorContext.MockPayload("2")));
1318         InMemoryJournal.addEntry(node2ID, 4, new ApplyJournalEntries(1));
1319
1320         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1321                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1322                 actorFactory.generateActorId("collector"));
1323         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1324                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1325                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1326         final CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1327
1328         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1329                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1330                 actorFactory.generateActorId("collector"));
1331         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1332                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1333                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1334         final CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1335
1336         // Send a ChangeServersVotingStatus message to node1 to change mode1 to voting. This should cause
1337         // node1 to try to elect itself as leader in order to apply the new server config. However node1's log
1338         // is behind node2's so node2 should not grant node1's vote. This should cause node1 to time out and
1339         // forward the request to node2.
1340
1341         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(
1342                 ImmutableMap.of(node1ID, true, node2ID, true));
1343         node1RaftActorRef.tell(changeServers, testKit.getRef());
1344         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1345         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1346
1347         MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1348         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1349                 votingServer(node1ID), votingServer(node2ID));
1350         assertEquals("getRaftState", RaftState.Leader, node2RaftActor.getRaftState());
1351
1352         MessageCollectorActor.expectFirstMatching(node1Collector, ApplyJournalEntries.class);
1353         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1354                 votingServer(node1ID), votingServer(node2ID));
1355         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1356         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1357
1358         LOG.info("testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout ending");
1359     }
1360
1361     @Test
1362     public void testChangeToVotingWithNoLeaderAndOtherLeaderElected() {
1363         LOG.info("testChangeToVotingWithNoLeaderAndOtherLeaderElected starting");
1364
1365         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1366         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1367         configParams.setElectionTimeoutFactor(100000);
1368
1369         final String node1ID = "node1";
1370         final String node2ID = "node2";
1371
1372         configParams.setPeerAddressResolver(peerId -> peerId.equals(node1ID)
1373                 ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID)
1374                         ? actorFactory.createTestActorPath(node2ID) : null);
1375
1376         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1377                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, true)));
1378         ReplicatedLogImplEntry persistedServerConfigEntry = new ReplicatedLogImplEntry(0, 1, persistedServerConfig);
1379
1380         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1381         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1382         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1383         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1384
1385         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1386                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1387                 actorFactory.generateActorId("collector"));
1388         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1389                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1390                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1391         final CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1392
1393         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1394                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1395                 actorFactory.generateActorId("collector"));
1396         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1397                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1398                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1399         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1400
1401         // Send a ChangeServersVotingStatus message to node1 to change node1 to voting. This should cause
1402         // node1 to try to elect itself as leader in order to apply the new server config. But we'll drop
1403         // RequestVote messages in node2 and make it the leader so node1 should forward the server change
1404         // request to node2 when node2 is elected.
1405
1406         node2RaftActor.setDropMessageOfType(RequestVote.class);
1407
1408         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true,
1409                 node2ID, true));
1410         node1RaftActorRef.tell(changeServers, testKit.getRef());
1411
1412         MessageCollectorActor.expectFirstMatching(node2Collector, RequestVote.class);
1413
1414         node2RaftActorRef.tell(TimeoutNow.INSTANCE, ActorRef.noSender());
1415
1416         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1417         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1418
1419         MessageCollectorActor.expectFirstMatching(node1Collector, ApplyJournalEntries.class);
1420         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1421                 votingServer(node1ID), votingServer(node2ID));
1422         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1423         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1424
1425         MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1426         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1427                 votingServer(node1ID), votingServer(node2ID));
1428         assertEquals("getRaftState", RaftState.Leader, node2RaftActor.getRaftState());
1429
1430         LOG.info("testChangeToVotingWithNoLeaderAndOtherLeaderElected ending");
1431     }
1432
1433     private static void verifyRaftState(RaftState expState, RaftActor... raftActors) {
1434         Stopwatch sw = Stopwatch.createStarted();
1435         while (sw.elapsed(TimeUnit.SECONDS) <= 5) {
1436             for (RaftActor raftActor : raftActors) {
1437                 if (raftActor.getRaftState() == expState) {
1438                     return;
1439                 }
1440             }
1441         }
1442
1443         fail("None of the RaftActors have state " + expState);
1444     }
1445
1446     private static ServerInfo votingServer(String id) {
1447         return new ServerInfo(id, true);
1448     }
1449
1450     private static ServerInfo nonVotingServer(String id) {
1451         return new ServerInfo(id, false);
1452     }
1453
1454     private TestActorRef<MessageCollectorActor> newLeaderCollectorActor(MockLeaderRaftActor leaderRaftActor) {
1455         return newCollectorActor(leaderRaftActor, LEADER_ID);
1456     }
1457
1458     private TestActorRef<MessageCollectorActor> newCollectorActor(AbstractMockRaftActor raftActor, String id) {
1459         TestActorRef<MessageCollectorActor> collectorActor = actorFactory.createTestActor(
1460                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1461                 actorFactory.generateActorId(id + "Collector"));
1462         raftActor.setCollectorActor(collectorActor);
1463         return collectorActor;
1464     }
1465
1466     private static void verifyServerConfigurationPayloadEntry(ReplicatedLog log, ServerInfo... expected) {
1467         ReplicatedLogEntry logEntry = log.get(log.lastIndex());
1468         assertEquals("Last log entry payload class", ServerConfigurationPayload.class, logEntry.getData().getClass());
1469         ServerConfigurationPayload payload = (ServerConfigurationPayload)logEntry.getData();
1470         assertEquals("Server config", Sets.newHashSet(expected), Sets.newHashSet(payload.getServerConfig()));
1471     }
1472
1473     private static RaftActorContextImpl newFollowerContext(String id, TestActorRef<? extends UntypedActor> actor) {
1474         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1475         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1476         configParams.setElectionTimeoutFactor(100000);
1477         NonPersistentDataProvider noPersistence = new NonPersistentDataProvider();
1478         ElectionTermImpl termInfo = new ElectionTermImpl(noPersistence, id, LOG);
1479         termInfo.update(1, LEADER_ID);
1480         return new RaftActorContextImpl(actor, actor.underlyingActor().getContext(),
1481                 id, termInfo, -1, -1, ImmutableMap.of(LEADER_ID, ""), configParams, noPersistence, LOG);
1482     }
1483
1484     abstract static class AbstractMockRaftActor extends MockRaftActor {
1485         private volatile TestActorRef<MessageCollectorActor> collectorActor;
1486         private volatile Class<?> dropMessageOfType;
1487
1488         AbstractMockRaftActor(String id, Map<String, String> peerAddresses, Optional<ConfigParams> config,
1489                 boolean persistent, TestActorRef<MessageCollectorActor> collectorActor) {
1490             super(builder().id(id).peerAddresses(peerAddresses).config(config.get())
1491                     .persistent(Optional.of(persistent)));
1492             this.collectorActor = collectorActor;
1493         }
1494
1495         void setDropMessageOfType(Class<?> dropMessageOfType) {
1496             this.dropMessageOfType = dropMessageOfType;
1497         }
1498
1499         void setCollectorActor(TestActorRef<MessageCollectorActor> collectorActor) {
1500             this.collectorActor = collectorActor;
1501         }
1502
1503         @Override
1504         public void handleCommand(Object message) {
1505             if (dropMessageOfType == null || !dropMessageOfType.equals(message.getClass())) {
1506                 super.handleCommand(message);
1507             }
1508
1509             if (collectorActor != null) {
1510                 collectorActor.tell(message, getSender());
1511             }
1512         }
1513     }
1514
1515     public static class CollectingMockRaftActor extends AbstractMockRaftActor {
1516
1517         CollectingMockRaftActor(String id, Map<String, String> peerAddresses, Optional<ConfigParams> config,
1518                 boolean persistent, TestActorRef<MessageCollectorActor> collectorActor) {
1519             super(id, peerAddresses, config, persistent, collectorActor);
1520             snapshotCohortDelegate = new RaftActorSnapshotCohort() {
1521                 @Override
1522                 public void createSnapshot(ActorRef actorRef) {
1523                     actorRef.tell(new CaptureSnapshotReply(new byte[0]), actorRef);
1524                 }
1525
1526                 @Override
1527                 public void applySnapshot(byte[] snapshotBytes) {
1528                 }
1529             };
1530         }
1531
1532         public static Props props(final String id, final Map<String, String> peerAddresses,
1533                 ConfigParams config, boolean persistent, TestActorRef<MessageCollectorActor> collectorActor) {
1534
1535             return Props.create(CollectingMockRaftActor.class, id, peerAddresses, Optional.of(config),
1536                     persistent, collectorActor);
1537         }
1538
1539     }
1540
1541     public static class MockLeaderRaftActor extends AbstractMockRaftActor {
1542         public MockLeaderRaftActor(Map<String, String> peerAddresses, ConfigParams config,
1543                 RaftActorContext fromContext) {
1544             super(LEADER_ID, peerAddresses, Optional.of(config), NO_PERSISTENCE, null);
1545             setPersistence(false);
1546
1547             RaftActorContext context = getRaftActorContext();
1548             for (int i = 0; i < fromContext.getReplicatedLog().size(); i++) {
1549                 ReplicatedLogEntry entry = fromContext.getReplicatedLog().get(i);
1550                 getState().add(entry.getData());
1551                 context.getReplicatedLog().append(entry);
1552             }
1553
1554             context.setCommitIndex(fromContext.getCommitIndex());
1555             context.setLastApplied(fromContext.getLastApplied());
1556             context.getTermInformation().update(fromContext.getTermInformation().getCurrentTerm(),
1557                     fromContext.getTermInformation().getVotedFor());
1558         }
1559
1560         @Override
1561         protected void initializeBehavior() {
1562             changeCurrentBehavior(new Leader(getRaftActorContext()));
1563             initializeBehaviorComplete.countDown();
1564         }
1565
1566         @Override
1567         @SuppressWarnings("checkstyle:IllegalCatch")
1568         public void createSnapshot(ActorRef actorRef) {
1569             try {
1570                 actorRef.tell(new CaptureSnapshotReply(RaftActorTest.fromObject(getState()).toByteArray()), actorRef);
1571             } catch (Exception e) {
1572                 LOG.error("createSnapshot failed", e);
1573             }
1574         }
1575
1576         static Props props(Map<String, String> peerAddresses, RaftActorContext fromContext) {
1577             DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1578             configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1579             configParams.setElectionTimeoutFactor(10);
1580             return Props.create(MockLeaderRaftActor.class, peerAddresses, configParams, fromContext);
1581         }
1582     }
1583
1584     public static class MockNewFollowerRaftActor extends AbstractMockRaftActor {
1585         public MockNewFollowerRaftActor(ConfigParams config, TestActorRef<MessageCollectorActor> collectorActor) {
1586             super(NEW_SERVER_ID, Maps.<String, String>newHashMap(), Optional.of(config), NO_PERSISTENCE,
1587                     collectorActor);
1588             setPersistence(false);
1589         }
1590
1591         static Props props(ConfigParams config, TestActorRef<MessageCollectorActor> collectorActor) {
1592             return Props.create(MockNewFollowerRaftActor.class, config, collectorActor);
1593         }
1594     }
1595 }