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.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.clearMessages;
  12 import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.expectFirstMatching;
  13 import akka.actor.ActorRef;
  14 import akka.actor.Props;
  15 import akka.actor.UntypedActor;
  16 import akka.dispatch.Dispatchers;
  17 import akka.testkit.JavaTestKit;
  18 import akka.testkit.TestActorRef;
  19 import com.google.common.base.Optional;
  20 import com.google.common.collect.ImmutableMap;
  21 import com.google.common.collect.Maps;
  22 import com.google.common.collect.Sets;
  23 import java.util.Collections;
  24 import java.util.List;
  25 import java.util.Map;
  26 //import java.util.List;
  27 import java.util.concurrent.TimeUnit;
  28 import org.junit.After;
  29 import org.junit.Before;
  30 import org.junit.Test;
  31 import org.opendaylight.controller.cluster.DataPersistenceProvider;
  32 import org.opendaylight.controller.cluster.NonPersistentDataProvider;
  33 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
  34 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
  35 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  36 import org.opendaylight.controller.cluster.raft.behaviors.AbstractLeader;
  37 import org.opendaylight.controller.cluster.raft.behaviors.Follower;
  38 import org.opendaylight.controller.cluster.raft.behaviors.Leader;
  39 import org.opendaylight.controller.cluster.raft.messages.AddServer;
  40 import org.opendaylight.controller.cluster.raft.messages.AddServerReply;
  41 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
  42 import org.opendaylight.controller.cluster.raft.messages.InstallSnapshot;
  43 import org.opendaylight.controller.cluster.raft.messages.ServerChangeStatus;
  44 import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
  45 import org.opendaylight.controller.cluster.raft.utils.ForwardMessageToBehaviorActor;
  46 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  47 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  48 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  49 import org.slf4j.Logger;
  50 import org.slf4j.LoggerFactory;
  51 import scala.concurrent.duration.FiniteDuration;
  52
  53 /**
  54  * Unit tests for RaftActorServerConfigurationSupport.
  55  *
  56  * @author Thomas Pantelis
  57  */
  58 public class RaftActorServerConfigurationSupportTest extends AbstractActorTest {
  59     static final String LEADER_ID = "leader";
  60     static final String FOLLOWER_ID = "follower";
  61     static final String NEW_SERVER_ID = "new-server";
  62     private static final Logger LOG = LoggerFactory.getLogger(RaftActorServerConfigurationSupportTest.class);
  63     private static final DataPersistenceProvider NO_PERSISTENCE = new NonPersistentDataProvider();
  64
  65     private final TestActorFactory actorFactory = new TestActorFactory(getSystem());
  66
  67     private final TestActorRef<ForwardMessageToBehaviorActor> followerActor = actorFactory.createTestActor(
  68             Props.create(ForwardMessageToBehaviorActor.class).withDispatcher(Dispatchers.DefaultDispatcherId()),
  69             actorFactory.generateActorId(FOLLOWER_ID));
  70
  71     private TestActorRef<MockNewFollowerRaftActor> newFollowerRaftActor;
  72     private TestActorRef<MessageCollectorActor> newFollowerCollectorActor;
  73
  74     private RaftActorContext newFollowerActorContext;
  75     private final JavaTestKit testKit = new JavaTestKit(getSystem());
  76
  77     @Before
  78     public void setup() {
  79         InMemoryJournal.clear();
  80         InMemorySnapshotStore.clear();
  81
  82         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
  83         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
  84         configParams.setElectionTimeoutFactor(100000);
  85         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
  86
  87         newFollowerCollectorActor = actorFactory.createTestActor(
  88                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
  89                 actorFactory.generateActorId(NEW_SERVER_ID + "Collector"));
  90         newFollowerRaftActor = actorFactory.createTestActor(MockNewFollowerRaftActor.props(
  91                 configParams, newFollowerCollectorActor).withDispatcher(Dispatchers.DefaultDispatcherId()),
  92                 actorFactory.generateActorId(NEW_SERVER_ID));
  93         newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext();
  94     }
  95
  96     @After
  97     public void tearDown() throws Exception {
  98         actorFactory.close();
  99     }
 100
 101     @Test
 102     public void testAddServerWithExistingFollower() throws Exception {
 103         RaftActorContext followerActorContext = newFollowerContext(FOLLOWER_ID, followerActor);
 104         followerActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 105                 0, 3, 1).build());
 106         followerActorContext.setCommitIndex(2);
 107         followerActorContext.setLastApplied(2);
 108
 109         Follower follower = new Follower(followerActorContext);
 110         followerActor.underlyingActor().setBehavior(follower);
 111
 112         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 113                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 114                         followerActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 115                 actorFactory.generateActorId(LEADER_ID));
 116
 117         // Expect initial heartbeat from the leader.
 118         expectFirstMatching(followerActor, AppendEntries.class);
 119         clearMessages(followerActor);
 120
 121         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 122
 123         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 124
 125         // Leader should install snapshot - capture and verify ApplySnapshot contents
 126
 127         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 128         List<Object> snapshotState = (List<Object>) MockRaftActor.toObject(applySnapshot.getSnapshot().getState());
 129         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 130
 131         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 132         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 133         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint());
 134
 135         // Verify ServerConfigurationPayload entry in leader's log
 136
 137         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 138         assertEquals("Leader journal last index", 3, leaderActorContext.getReplicatedLog().lastIndex());
 139         assertEquals("Leader commit index", 3, leaderActorContext.getCommitIndex());
 140         assertEquals("Leader last applied index", 3, leaderActorContext.getLastApplied());
 141         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), LEADER_ID, FOLLOWER_ID, NEW_SERVER_ID);
 142
 143         // Verify ServerConfigurationPayload entry in both followers
 144
 145         assertEquals("Follower journal last index", 3, followerActorContext.getReplicatedLog().lastIndex());
 146         verifyServerConfigurationPayloadEntry(followerActorContext.getReplicatedLog(), LEADER_ID, FOLLOWER_ID, NEW_SERVER_ID);
 147
 148         assertEquals("New follower journal last index", 3, newFollowerActorContext.getReplicatedLog().lastIndex());
 149         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), LEADER_ID, FOLLOWER_ID, NEW_SERVER_ID);
 150
 151         // Verify new server config was applied in both followers
 152
 153         assertEquals("Follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID),
 154                 followerActorContext.getPeerAddresses().keySet());
 155
 156         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, FOLLOWER_ID),
 157                 newFollowerActorContext.getPeerAddresses().keySet());
 158
 159         clearMessages(followerActor);
 160         clearMessages(newFollowerCollectorActor);
 161
 162         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 163         expectFirstMatching(followerActor, ApplyState.class);
 164
 165         assertEquals("Follower commit index", 3, followerActorContext.getCommitIndex());
 166         assertEquals("Follower last applied index", 3, followerActorContext.getLastApplied());
 167         assertEquals("New follower commit index", 3, newFollowerActorContext.getCommitIndex());
 168         assertEquals("New follower last applied index", 3, newFollowerActorContext.getLastApplied());
 169     }
 170
 171     @Test
 172     public void testAddServerWithNoExistingFollower() throws Exception {
 173         RaftActorContext initialActorContext = new MockRaftActorContext();
 174         initialActorContext.setCommitIndex(1);
 175         initialActorContext.setLastApplied(1);
 176         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 177                 0, 2, 1).build());
 178
 179         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 180                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 181                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 182                 actorFactory.generateActorId(LEADER_ID));
 183
 184         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 185         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 186
 187         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 188
 189         // Leader should install snapshot - capture and verify ApplySnapshot contents
 190
 191         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 192         List<Object> snapshotState = (List<Object>) MockRaftActor.toObject(applySnapshot.getSnapshot().getState());
 193         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 194
 195         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 196         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 197         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint());
 198
 199         // Verify ServerConfigurationPayload entry in leader's log
 200
 201         assertEquals("Leader journal last index", 2, leaderActorContext.getReplicatedLog().lastIndex());
 202         assertEquals("Leader commit index", 2, leaderActorContext.getCommitIndex());
 203         assertEquals("Leader last applied index", 2, leaderActorContext.getLastApplied());
 204         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), LEADER_ID, NEW_SERVER_ID);
 205
 206         // Verify ServerConfigurationPayload entry in the new follower
 207
 208         clearMessages(newFollowerCollectorActor);
 209
 210         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 211         assertEquals("New follower journal last index", 2, newFollowerActorContext.getReplicatedLog().lastIndex());
 212         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), LEADER_ID, NEW_SERVER_ID);
 213
 214         // Verify new server config was applied in the new follower
 215
 216         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID),
 217                 newFollowerActorContext.getPeerAddresses().keySet());
 218     }
 219
 220     @Test
 221     public void testAddServerAsNonVoting() throws Exception {
 222         RaftActorContext initialActorContext = new MockRaftActorContext();
 223         initialActorContext.setCommitIndex(-1);
 224         initialActorContext.setLastApplied(-1);
 225         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
 226
 227         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 228                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 229                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 230                 actorFactory.generateActorId(LEADER_ID));
 231
 232         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 233         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 234
 235         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), false), testKit.getRef());
 236
 237         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 238         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 239         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint());
 240
 241         // Verify ServerConfigurationPayload entry in leader's log
 242
 243         assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex());
 244         assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex());
 245         assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied());
 246         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), LEADER_ID, NEW_SERVER_ID);
 247
 248         // Verify ServerConfigurationPayload entry in the new follower
 249
 250         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 251         assertEquals("New follower journal last index", 0, newFollowerActorContext.getReplicatedLog().lastIndex());
 252         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), LEADER_ID, NEW_SERVER_ID);
 253
 254         // Verify new server config was applied in the new follower
 255
 256         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID),
 257                 newFollowerActorContext.getPeerAddresses().keySet());
 258
 259         MessageCollectorActor.assertNoneMatching(newFollowerCollectorActor, InstallSnapshot.SERIALIZABLE_CLASS, 500);
 260     }
 261
 262     @Test
 263     public void testAddServerWithInstallSnapshotTimeout() throws Exception {
 264         newFollowerRaftActor.underlyingActor().setDropMessageOfType(InstallSnapshot.SERIALIZABLE_CLASS);
 265
 266         RaftActorContext initialActorContext = new MockRaftActorContext();
 267         initialActorContext.setCommitIndex(-1);
 268         initialActorContext.setLastApplied(-1);
 269         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
 270
 271         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 272                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 273                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 274                 actorFactory.generateActorId(LEADER_ID));
 275
 276         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 277         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 278
 279         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 280
 281         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 282         assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus());
 283
 284         assertEquals("Leader peers size", 0, leaderActorContext.getPeerAddresses().keySet().size());
 285         assertEquals("Leader followers size", 0,
 286                 ((AbstractLeader)leaderRaftActor.getCurrentBehavior()).getFollowerIds().size());
 287     }
 288
 289     @Test
 290     public void testAddServerWithNoLeader() {
 291         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 292         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 293
 294         TestActorRef<MockRaftActor> noLeaderActor = actorFactory.createTestActor(
 295                 MockRaftActor.props(LEADER_ID, ImmutableMap.<String,String>of(FOLLOWER_ID, followerActor.path().toString()),
 296                         Optional.<ConfigParams>of(configParams), NO_PERSISTENCE).withDispatcher(Dispatchers.DefaultDispatcherId()),
 297                 actorFactory.generateActorId(LEADER_ID));
 298         noLeaderActor.underlyingActor().waitForInitializeBehaviorComplete();
 299
 300         noLeaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 301         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 302         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 303     }
 304
 305     @Test
 306     public void testAddServerForwardedToLeader() {
 307         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 308         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 309
 310         TestActorRef<MessageCollectorActor> leaderActor = actorFactory.createTestActor(
 311                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 312                 actorFactory.generateActorId(LEADER_ID));
 313
 314         TestActorRef<MockRaftActor> followerRaftActor = actorFactory.createTestActor(
 315                 MockRaftActor.props(FOLLOWER_ID, ImmutableMap.<String,String>of(LEADER_ID, leaderActor.path().toString()),
 316                         Optional.<ConfigParams>of(configParams), NO_PERSISTENCE).withDispatcher(Dispatchers.DefaultDispatcherId()),
 317                 actorFactory.generateActorId(FOLLOWER_ID));
 318         followerRaftActor.underlyingActor().waitForInitializeBehaviorComplete();
 319
 320         followerRaftActor.tell(new AppendEntries(1, LEADER_ID, 0, 1, Collections.<ReplicatedLogEntry>emptyList(),
 321                 -1, -1, (short)0), leaderActor);
 322
 323         followerRaftActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 324         expectFirstMatching(leaderActor, AddServer.class);
 325     }
 326
 327     private void verifyServerConfigurationPayloadEntry(ReplicatedLog log, String... cNew) {
 328         ReplicatedLogEntry logEntry = log.get(log.lastIndex());
 329         assertEquals("Last log entry payload class", ServerConfigurationPayload.class, logEntry.getData().getClass());
 330         ServerConfigurationPayload payload = (ServerConfigurationPayload)logEntry.getData();
 331         assertEquals("getNewServerConfig", Sets.newHashSet(cNew), Sets.newHashSet(payload.getNewServerConfig()));
 332     }
 333
 334     private RaftActorContext newFollowerContext(String id, TestActorRef<? extends UntypedActor> actor) {
 335         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 336         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 337         configParams.setElectionTimeoutFactor(100000);
 338         ElectionTermImpl termInfo = new ElectionTermImpl(NO_PERSISTENCE, id, LOG);
 339         termInfo.update(1, LEADER_ID);
 340         RaftActorContext followerActorContext = new RaftActorContextImpl(actor, actor.underlyingActor().getContext(),
 341                 id, termInfo, -1, -1,
 342                 ImmutableMap.of(LEADER_ID, ""), configParams, NO_PERSISTENCE, LOG);
 343
 344         return followerActorContext;
 345     }
 346
 347     public static class MockLeaderRaftActor extends MockRaftActor {
 348         public MockLeaderRaftActor(Map<String, String> peerAddresses, ConfigParams config,
 349                 RaftActorContext fromContext) {
 350             super(LEADER_ID, peerAddresses, Optional.of(config), NO_PERSISTENCE);
 351
 352             RaftActorContext context = getRaftActorContext();
 353             for(int i = 0; i < fromContext.getReplicatedLog().size(); i++) {
 354                 ReplicatedLogEntry entry = fromContext.getReplicatedLog().get(i);
 355                 getState().add(entry.getData());
 356                 context.getReplicatedLog().append(entry);
 357             }
 358
 359             context.setCommitIndex(fromContext.getCommitIndex());
 360             context.setLastApplied(fromContext.getLastApplied());
 361             context.getTermInformation().update(fromContext.getTermInformation().getCurrentTerm(),
 362                     fromContext.getTermInformation().getVotedFor());
 363         }
 364
 365         @Override
 366         protected void initializeBehavior() {
 367             changeCurrentBehavior(new Leader(getRaftActorContext()));
 368             initializeBehaviorComplete.countDown();
 369         }
 370
 371         @Override
 372         public void createSnapshot(ActorRef actorRef) {
 373             try {
 374                 actorRef.tell(new CaptureSnapshotReply(RaftActorTest.fromObject(getState()).toByteArray()), actorRef);
 375             } catch (Exception e) {
 376                 LOG.error("createSnapshot failed", e);
 377             }
 378         }
 379
 380         static Props props(Map<String, String> peerAddresses, RaftActorContext fromContext) {
 381             DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 382             configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 383             configParams.setElectionTimeoutFactor(1);
 384             return Props.create(MockLeaderRaftActor.class, peerAddresses, configParams, fromContext);
 385         }
 386     }
 387
 388     public static class MockNewFollowerRaftActor extends MockRaftActor {
 389         private final TestActorRef<MessageCollectorActor> collectorActor;
 390         private volatile Class<?> dropMessageOfType;
 391
 392         public MockNewFollowerRaftActor(ConfigParams config, TestActorRef<MessageCollectorActor> collectorActor) {
 393             super(NEW_SERVER_ID, Maps.<String, String>newHashMap(), Optional.of(config), null);
 394             this.collectorActor = collectorActor;
 395         }
 396
 397         void setDropMessageOfType(Class<?> dropMessageOfType) {
 398             this.dropMessageOfType = dropMessageOfType;
 399         }
 400
 401         @Override
 402         public void handleCommand(Object message) {
 403             if(dropMessageOfType != null && dropMessageOfType.equals(message.getClass())) {
 404                 return;
 405             }
 406
 407             super.handleCommand(message);
 408             collectorActor.tell(message, getSender());
 409         }
 410
 411         static Props props(ConfigParams config, TestActorRef<MessageCollectorActor> collectorActor) {
 412             return Props.create(MockNewFollowerRaftActor.class, config, collectorActor);
 413         }
 414     }
 415 }