2 * Copyright (c) 2014, 2015 Cisco Systems, Inc. and others. All rights reserved.
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
9 package org.opendaylight.controller.cluster.raft.behaviors;
11 import static org.junit.Assert.assertEquals;
12 import static org.junit.Assert.assertFalse;
13 import static org.junit.Assert.assertNotNull;
14 import static org.junit.Assert.assertNull;
15 import static org.junit.Assert.assertSame;
16 import static org.junit.Assert.assertTrue;
17 import static org.mockito.Mockito.mock;
18 import static org.mockito.Mockito.never;
19 import static org.mockito.Mockito.verify;
21 import akka.actor.ActorRef;
22 import akka.actor.PoisonPill;
23 import akka.actor.Props;
24 import akka.actor.Terminated;
25 import akka.testkit.JavaTestKit;
26 import akka.testkit.TestActorRef;
27 import com.google.common.collect.ImmutableMap;
28 import com.google.common.util.concurrent.Uninterruptibles;
29 import com.google.protobuf.ByteString;
30 import java.util.Arrays;
31 import java.util.Collections;
32 import java.util.HashMap;
33 import java.util.List;
35 import java.util.concurrent.TimeUnit;
36 import org.junit.After;
37 import org.junit.Test;
38 import org.opendaylight.controller.cluster.raft.DefaultConfigParamsImpl;
39 import org.opendaylight.controller.cluster.raft.FollowerLogInformation;
40 import org.opendaylight.controller.cluster.raft.MockRaftActorContext;
41 import org.opendaylight.controller.cluster.raft.RaftActorContext;
42 import org.opendaylight.controller.cluster.raft.RaftActorLeadershipTransferCohort;
43 import org.opendaylight.controller.cluster.raft.RaftState;
44 import org.opendaylight.controller.cluster.raft.RaftVersions;
45 import org.opendaylight.controller.cluster.raft.ReplicatedLogEntry;
46 import org.opendaylight.controller.cluster.raft.Snapshot;
47 import org.opendaylight.controller.cluster.raft.VotingState;
48 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
49 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot;
50 import org.opendaylight.controller.cluster.raft.base.messages.ElectionTimeout;
51 import org.opendaylight.controller.cluster.raft.base.messages.Replicate;
52 import org.opendaylight.controller.cluster.raft.base.messages.SendHeartBeat;
53 import org.opendaylight.controller.cluster.raft.base.messages.SendInstallSnapshot;
54 import org.opendaylight.controller.cluster.raft.base.messages.TimeoutNow;
55 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
56 import org.opendaylight.controller.cluster.raft.messages.AppendEntriesReply;
57 import org.opendaylight.controller.cluster.raft.messages.InstallSnapshot;
58 import org.opendaylight.controller.cluster.raft.messages.InstallSnapshotReply;
59 import org.opendaylight.controller.cluster.raft.messages.RaftRPC;
60 import org.opendaylight.controller.cluster.raft.messages.RequestVoteReply;
61 import org.opendaylight.controller.cluster.raft.persisted.ApplyJournalEntries;
62 import org.opendaylight.controller.cluster.raft.persisted.SimpleReplicatedLogEntry;
63 import org.opendaylight.controller.cluster.raft.policy.DefaultRaftPolicy;
64 import org.opendaylight.controller.cluster.raft.policy.RaftPolicy;
65 import org.opendaylight.controller.cluster.raft.utils.ForwardMessageToBehaviorActor;
66 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
67 import org.opendaylight.yangtools.concepts.Identifier;
68 import scala.concurrent.duration.FiniteDuration;
70 public class LeaderTest extends AbstractLeaderTest<Leader> {
72 static final String FOLLOWER_ID = "follower";
73 public static final String LEADER_ID = "leader";
75 private final TestActorRef<ForwardMessageToBehaviorActor> leaderActor = actorFactory.createTestActor(
76 Props.create(ForwardMessageToBehaviorActor.class), actorFactory.generateActorId("leader"));
78 private final TestActorRef<ForwardMessageToBehaviorActor> followerActor = actorFactory.createTestActor(
79 Props.create(ForwardMessageToBehaviorActor.class), actorFactory.generateActorId("follower"));
81 private Leader leader;
82 private final short payloadVersion = 5;
86 public void tearDown() throws Exception {
95 public void testHandleMessageForUnknownMessage() throws Exception {
96 logStart("testHandleMessageForUnknownMessage");
98 leader = new Leader(createActorContext());
100 // handle message should null when it receives an unknown message
101 assertNull(leader.handleMessage(followerActor, "foo"));
105 public void testThatLeaderSendsAHeartbeatMessageToAllFollowers() throws Exception {
106 logStart("testThatLeaderSendsAHeartbeatMessageToAllFollowers");
108 MockRaftActorContext actorContext = createActorContextWithFollower();
109 actorContext.setCommitIndex(-1);
110 actorContext.setPayloadVersion(payloadVersion);
113 actorContext.getTermInformation().update(term, "");
115 leader = new Leader(actorContext);
116 actorContext.setCurrentBehavior(leader);
118 // Leader should send an immediate heartbeat with no entries as follower is inactive.
119 final long lastIndex = actorContext.getReplicatedLog().lastIndex();
120 AppendEntries appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
121 assertEquals("getTerm", term, appendEntries.getTerm());
122 assertEquals("getPrevLogIndex", -1, appendEntries.getPrevLogIndex());
123 assertEquals("getPrevLogTerm", -1, appendEntries.getPrevLogTerm());
124 assertEquals("Entries size", 0, appendEntries.getEntries().size());
125 assertEquals("getPayloadVersion", payloadVersion, appendEntries.getPayloadVersion());
127 // The follower would normally reply - simulate that explicitly here.
128 leader.handleMessage(followerActor, new AppendEntriesReply(
129 FOLLOWER_ID, term, true, lastIndex - 1, term, (short)0));
130 assertEquals("isFollowerActive", true, leader.getFollower(FOLLOWER_ID).isFollowerActive());
132 followerActor.underlyingActor().clear();
134 // Sleep for the heartbeat interval so AppendEntries is sent.
135 Uninterruptibles.sleepUninterruptibly(actorContext.getConfigParams()
136 .getHeartBeatInterval().toMillis(), TimeUnit.MILLISECONDS);
138 leader.handleMessage(leaderActor, SendHeartBeat.INSTANCE);
140 appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
141 assertEquals("getPrevLogIndex", lastIndex - 1, appendEntries.getPrevLogIndex());
142 assertEquals("getPrevLogTerm", term, appendEntries.getPrevLogTerm());
143 assertEquals("Entries size", 1, appendEntries.getEntries().size());
144 assertEquals("Entry getIndex", lastIndex, appendEntries.getEntries().get(0).getIndex());
145 assertEquals("Entry getTerm", term, appendEntries.getEntries().get(0).getTerm());
146 assertEquals("getPayloadVersion", payloadVersion, appendEntries.getPayloadVersion());
150 private RaftActorBehavior sendReplicate(MockRaftActorContext actorContext, long index) {
151 return sendReplicate(actorContext, 1, index);
154 private RaftActorBehavior sendReplicate(MockRaftActorContext actorContext, long term, long index) {
155 MockRaftActorContext.MockPayload payload = new MockRaftActorContext.MockPayload("foo");
156 SimpleReplicatedLogEntry newEntry = new SimpleReplicatedLogEntry(index, term, payload);
157 actorContext.getReplicatedLog().append(newEntry);
158 return leader.handleMessage(leaderActor, new Replicate(null, null, newEntry));
162 public void testHandleReplicateMessageSendAppendEntriesToFollower() throws Exception {
163 logStart("testHandleReplicateMessageSendAppendEntriesToFollower");
165 MockRaftActorContext actorContext = createActorContextWithFollower();
168 actorContext.getTermInformation().update(term, "");
170 leader = new Leader(actorContext);
172 // Leader will send an immediate heartbeat - ignore it.
173 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
175 // The follower would normally reply - simulate that explicitly here.
176 long lastIndex = actorContext.getReplicatedLog().lastIndex();
177 leader.handleMessage(followerActor, new AppendEntriesReply(
178 FOLLOWER_ID, term, true, lastIndex, term, (short)0));
179 assertEquals("isFollowerActive", true, leader.getFollower(FOLLOWER_ID).isFollowerActive());
181 followerActor.underlyingActor().clear();
183 RaftActorBehavior raftBehavior = sendReplicate(actorContext, lastIndex + 1);
185 // State should not change
186 assertTrue(raftBehavior instanceof Leader);
188 AppendEntries appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
189 assertEquals("getPrevLogIndex", lastIndex, appendEntries.getPrevLogIndex());
190 assertEquals("getPrevLogTerm", term, appendEntries.getPrevLogTerm());
191 assertEquals("Entries size", 1, appendEntries.getEntries().size());
192 assertEquals("Entry getIndex", lastIndex + 1, appendEntries.getEntries().get(0).getIndex());
193 assertEquals("Entry getTerm", term, appendEntries.getEntries().get(0).getTerm());
194 assertEquals("Entry payload", "foo", appendEntries.getEntries().get(0).getData().toString());
195 assertEquals("Commit Index", lastIndex, actorContext.getCommitIndex());
199 public void testHandleReplicateMessageWithHigherTermThanPreviousEntry() throws Exception {
200 logStart("testHandleReplicateMessageWithHigherTermThanPreviousEntry");
202 MockRaftActorContext actorContext = createActorContextWithFollower();
203 actorContext.setCommitIndex(-1);
204 actorContext.setLastApplied(-1);
206 // The raft context is initialized with a couple log entries. However the commitIndex
207 // is -1, simulating that the leader previously didn't get consensus and thus the log entries weren't
208 // committed and applied. Now it regains leadership with a higher term (2).
209 long prevTerm = actorContext.getTermInformation().getCurrentTerm();
210 long newTerm = prevTerm + 1;
211 actorContext.getTermInformation().update(newTerm, "");
213 leader = new Leader(actorContext);
214 actorContext.setCurrentBehavior(leader);
216 // Leader will send an immediate heartbeat - ignore it.
217 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
219 // The follower replies with the leader's current last index and term, simulating that it is
220 // up to date with the leader.
221 long lastIndex = actorContext.getReplicatedLog().lastIndex();
222 leader.handleMessage(followerActor, new AppendEntriesReply(
223 FOLLOWER_ID, newTerm, true, lastIndex, prevTerm, (short)0));
225 // The commit index should not get updated even though consensus was reached. This is b/c the
226 // last entry's term does match the current term. As per §5.4.1, "Raft never commits log entries
227 // from previous terms by counting replicas".
228 assertEquals("Commit Index", -1, actorContext.getCommitIndex());
230 followerActor.underlyingActor().clear();
232 // Now replicate a new entry with the new term 2.
233 long newIndex = lastIndex + 1;
234 sendReplicate(actorContext, newTerm, newIndex);
236 AppendEntries appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
237 assertEquals("getPrevLogIndex", lastIndex, appendEntries.getPrevLogIndex());
238 assertEquals("getPrevLogTerm", prevTerm, appendEntries.getPrevLogTerm());
239 assertEquals("Entries size", 1, appendEntries.getEntries().size());
240 assertEquals("Entry getIndex", newIndex, appendEntries.getEntries().get(0).getIndex());
241 assertEquals("Entry getTerm", newTerm, appendEntries.getEntries().get(0).getTerm());
242 assertEquals("Entry payload", "foo", appendEntries.getEntries().get(0).getData().toString());
244 // The follower replies with success. The leader should now update the commit index to the new index
245 // as per §5.4.1 "once an entry from the current term is committed by counting replicas, then all
246 // prior entries are committed indirectly".
247 leader.handleMessage(followerActor, new AppendEntriesReply(
248 FOLLOWER_ID, newTerm, true, newIndex, newTerm, (short)0));
250 assertEquals("Commit Index", newIndex, actorContext.getCommitIndex());
254 public void testHandleReplicateMessageCommitIndexIncrementedBeforeConsensus() throws Exception {
255 logStart("testHandleReplicateMessageCommitIndexIncrementedBeforeConsensus");
257 MockRaftActorContext actorContext = createActorContextWithFollower();
258 actorContext.setRaftPolicy(createRaftPolicy(true, true));
261 actorContext.getTermInformation().update(term, "");
263 leader = new Leader(actorContext);
265 // Leader will send an immediate heartbeat - ignore it.
266 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
268 // The follower would normally reply - simulate that explicitly here.
269 long lastIndex = actorContext.getReplicatedLog().lastIndex();
270 leader.handleMessage(followerActor, new AppendEntriesReply(
271 FOLLOWER_ID, term, true, lastIndex, term, (short) 0));
272 assertEquals("isFollowerActive", true, leader.getFollower(FOLLOWER_ID).isFollowerActive());
274 followerActor.underlyingActor().clear();
276 RaftActorBehavior raftBehavior = sendReplicate(actorContext, lastIndex + 1);
278 // State should not change
279 assertTrue(raftBehavior instanceof Leader);
281 AppendEntries appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
282 assertEquals("getPrevLogIndex", lastIndex, appendEntries.getPrevLogIndex());
283 assertEquals("getPrevLogTerm", term, appendEntries.getPrevLogTerm());
284 assertEquals("Entries size", 1, appendEntries.getEntries().size());
285 assertEquals("Entry getIndex", lastIndex + 1, appendEntries.getEntries().get(0).getIndex());
286 assertEquals("Entry getTerm", term, appendEntries.getEntries().get(0).getTerm());
287 assertEquals("Entry payload", "foo", appendEntries.getEntries().get(0).getData().toString());
288 assertEquals("Commit Index", lastIndex + 1, actorContext.getCommitIndex());
292 public void testMultipleReplicateShouldNotCauseDuplicateAppendEntriesToBeSent() throws Exception {
293 logStart("testHandleReplicateMessageSendAppendEntriesToFollower");
295 MockRaftActorContext actorContext = createActorContextWithFollower();
296 actorContext.setConfigParams(new DefaultConfigParamsImpl() {
298 public FiniteDuration getHeartBeatInterval() {
299 return FiniteDuration.apply(5, TimeUnit.SECONDS);
304 actorContext.getTermInformation().update(term, "");
306 leader = new Leader(actorContext);
308 // Leader will send an immediate heartbeat - ignore it.
309 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
311 // The follower would normally reply - simulate that explicitly here.
312 long lastIndex = actorContext.getReplicatedLog().lastIndex();
313 leader.handleMessage(followerActor, new AppendEntriesReply(
314 FOLLOWER_ID, term, true, lastIndex, term, (short)0));
315 assertEquals("isFollowerActive", true, leader.getFollower(FOLLOWER_ID).isFollowerActive());
317 followerActor.underlyingActor().clear();
319 for (int i = 0; i < 5; i++) {
320 sendReplicate(actorContext, lastIndex + i + 1);
323 List<AppendEntries> allMessages = MessageCollectorActor.getAllMatching(followerActor, AppendEntries.class);
324 // We expect only 1 message to be sent because of two reasons,
325 // - an append entries reply was not received
326 // - the heartbeat interval has not expired
327 // In this scenario if multiple messages are sent they would likely be duplicates
328 assertEquals("The number of append entries collected should be 1", 1, allMessages.size());
332 public void testMultipleReplicateWithReplyShouldResultInAppendEntries() throws Exception {
333 logStart("testMultipleReplicateWithReplyShouldResultInAppendEntries");
335 MockRaftActorContext actorContext = createActorContextWithFollower();
336 actorContext.setConfigParams(new DefaultConfigParamsImpl() {
338 public FiniteDuration getHeartBeatInterval() {
339 return FiniteDuration.apply(5, TimeUnit.SECONDS);
344 actorContext.getTermInformation().update(term, "");
346 leader = new Leader(actorContext);
348 // Leader will send an immediate heartbeat - ignore it.
349 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
351 // The follower would normally reply - simulate that explicitly here.
352 long lastIndex = actorContext.getReplicatedLog().lastIndex();
353 leader.handleMessage(followerActor, new AppendEntriesReply(
354 FOLLOWER_ID, term, true, lastIndex, term, (short)0));
355 assertEquals("isFollowerActive", true, leader.getFollower(FOLLOWER_ID).isFollowerActive());
357 followerActor.underlyingActor().clear();
359 for (int i = 0; i < 3; i++) {
360 sendReplicate(actorContext, lastIndex + i + 1);
361 leader.handleMessage(followerActor, new AppendEntriesReply(
362 FOLLOWER_ID, term, true, lastIndex + i + 1, term, (short)0));
366 for (int i = 3; i < 5; i++) {
367 sendReplicate(actorContext, lastIndex + i + 1);
370 List<AppendEntries> allMessages = MessageCollectorActor.getAllMatching(followerActor, AppendEntries.class);
371 // We expect 4 here because the first 3 replicate got a reply and so the 4th entry would
372 // get sent to the follower - but not the 5th
373 assertEquals("The number of append entries collected should be 4", 4, allMessages.size());
375 for (int i = 0; i < 4; i++) {
376 long expected = allMessages.get(i).getEntries().get(0).getIndex();
377 assertEquals(expected, i + 2);
382 public void testDuplicateAppendEntriesWillBeSentOnHeartBeat() throws Exception {
383 logStart("testDuplicateAppendEntriesWillBeSentOnHeartBeat");
385 MockRaftActorContext actorContext = createActorContextWithFollower();
386 actorContext.setConfigParams(new DefaultConfigParamsImpl() {
388 public FiniteDuration getHeartBeatInterval() {
389 return FiniteDuration.apply(500, TimeUnit.MILLISECONDS);
394 actorContext.getTermInformation().update(term, "");
396 leader = new Leader(actorContext);
398 // Leader will send an immediate heartbeat - ignore it.
399 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
401 // The follower would normally reply - simulate that explicitly here.
402 long lastIndex = actorContext.getReplicatedLog().lastIndex();
403 leader.handleMessage(followerActor, new AppendEntriesReply(
404 FOLLOWER_ID, term, true, lastIndex, term, (short)0));
405 assertEquals("isFollowerActive", true, leader.getFollower(FOLLOWER_ID).isFollowerActive());
407 followerActor.underlyingActor().clear();
409 sendReplicate(actorContext, lastIndex + 1);
411 // Wait slightly longer than heartbeat duration
412 Uninterruptibles.sleepUninterruptibly(750, TimeUnit.MILLISECONDS);
414 leader.handleMessage(leaderActor, SendHeartBeat.INSTANCE);
416 List<AppendEntries> allMessages = MessageCollectorActor.getAllMatching(followerActor, AppendEntries.class);
417 assertEquals("The number of append entries collected should be 2", 2, allMessages.size());
419 assertEquals(1, allMessages.get(0).getEntries().size());
420 assertEquals(lastIndex + 1, allMessages.get(0).getEntries().get(0).getIndex());
421 assertEquals(1, allMessages.get(1).getEntries().size());
422 assertEquals(lastIndex + 1, allMessages.get(0).getEntries().get(0).getIndex());
427 public void testHeartbeatsAreAlwaysSentIfTheHeartbeatIntervalHasElapsed() throws Exception {
428 logStart("testHeartbeatsAreAlwaysSentIfTheHeartbeatIntervalHasElapsed");
430 MockRaftActorContext actorContext = createActorContextWithFollower();
431 actorContext.setConfigParams(new DefaultConfigParamsImpl() {
433 public FiniteDuration getHeartBeatInterval() {
434 return FiniteDuration.apply(100, TimeUnit.MILLISECONDS);
439 actorContext.getTermInformation().update(term, "");
441 leader = new Leader(actorContext);
443 // Leader will send an immediate heartbeat - ignore it.
444 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
446 // The follower would normally reply - simulate that explicitly here.
447 long lastIndex = actorContext.getReplicatedLog().lastIndex();
448 leader.handleMessage(followerActor, new AppendEntriesReply(
449 FOLLOWER_ID, term, true, lastIndex, term, (short)0));
450 assertEquals("isFollowerActive", true, leader.getFollower(FOLLOWER_ID).isFollowerActive());
452 followerActor.underlyingActor().clear();
454 for (int i = 0; i < 3; i++) {
455 Uninterruptibles.sleepUninterruptibly(150, TimeUnit.MILLISECONDS);
456 leader.handleMessage(leaderActor, SendHeartBeat.INSTANCE);
459 List<AppendEntries> allMessages = MessageCollectorActor.getAllMatching(followerActor, AppendEntries.class);
460 assertEquals("The number of append entries collected should be 3", 3, allMessages.size());
464 public void testSendingReplicateImmediatelyAfterHeartbeatDoesReplicate() throws Exception {
465 logStart("testSendingReplicateImmediatelyAfterHeartbeatDoesReplicate");
467 MockRaftActorContext actorContext = createActorContextWithFollower();
468 actorContext.setConfigParams(new DefaultConfigParamsImpl() {
470 public FiniteDuration getHeartBeatInterval() {
471 return FiniteDuration.apply(100, TimeUnit.MILLISECONDS);
476 actorContext.getTermInformation().update(term, "");
478 leader = new Leader(actorContext);
480 // Leader will send an immediate heartbeat - ignore it.
481 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
483 // The follower would normally reply - simulate that explicitly here.
484 long lastIndex = actorContext.getReplicatedLog().lastIndex();
485 leader.handleMessage(followerActor, new AppendEntriesReply(
486 FOLLOWER_ID, term, true, lastIndex, term, (short)0));
487 assertEquals("isFollowerActive", true, leader.getFollower(FOLLOWER_ID).isFollowerActive());
489 followerActor.underlyingActor().clear();
491 Uninterruptibles.sleepUninterruptibly(150, TimeUnit.MILLISECONDS);
492 leader.handleMessage(leaderActor, SendHeartBeat.INSTANCE);
493 sendReplicate(actorContext, lastIndex + 1);
495 List<AppendEntries> allMessages = MessageCollectorActor.getAllMatching(followerActor, AppendEntries.class);
496 assertEquals("The number of append entries collected should be 2", 2, allMessages.size());
498 assertEquals(0, allMessages.get(0).getEntries().size());
499 assertEquals(1, allMessages.get(1).getEntries().size());
504 public void testHandleReplicateMessageWhenThereAreNoFollowers() throws Exception {
505 logStart("testHandleReplicateMessageWhenThereAreNoFollowers");
507 MockRaftActorContext actorContext = createActorContext();
509 leader = new Leader(actorContext);
511 actorContext.setLastApplied(0);
513 long newLogIndex = actorContext.getReplicatedLog().lastIndex() + 1;
514 long term = actorContext.getTermInformation().getCurrentTerm();
515 ReplicatedLogEntry newEntry = new SimpleReplicatedLogEntry(
516 newLogIndex, term, new MockRaftActorContext.MockPayload("foo"));
518 actorContext.getReplicatedLog().append(newEntry);
520 final Identifier id = new MockIdentifier("state-id");
521 RaftActorBehavior raftBehavior = leader.handleMessage(leaderActor, new Replicate(leaderActor, id, newEntry));
523 // State should not change
524 assertTrue(raftBehavior instanceof Leader);
526 assertEquals("getCommitIndex", newLogIndex, actorContext.getCommitIndex());
528 // We should get 2 ApplyState messages - 1 for new log entry and 1 for the previous
529 // one since lastApplied state is 0.
530 List<ApplyState> applyStateList = MessageCollectorActor.getAllMatching(
531 leaderActor, ApplyState.class);
532 assertEquals("ApplyState count", newLogIndex, applyStateList.size());
534 for (int i = 0; i <= newLogIndex - 1; i++ ) {
535 ApplyState applyState = applyStateList.get(i);
536 assertEquals("getIndex", i + 1, applyState.getReplicatedLogEntry().getIndex());
537 assertEquals("getTerm", term, applyState.getReplicatedLogEntry().getTerm());
540 ApplyState last = applyStateList.get((int) newLogIndex - 1);
541 assertEquals("getData", newEntry.getData(), last.getReplicatedLogEntry().getData());
542 assertEquals("getIdentifier", id, last.getIdentifier());
546 public void testSendAppendEntriesOnAnInProgressInstallSnapshot() throws Exception {
547 logStart("testSendAppendEntriesOnAnInProgressInstallSnapshot");
549 final MockRaftActorContext actorContext = createActorContextWithFollower();
551 Map<String, String> leadersSnapshot = new HashMap<>();
552 leadersSnapshot.put("1", "A");
553 leadersSnapshot.put("2", "B");
554 leadersSnapshot.put("3", "C");
557 actorContext.getReplicatedLog().removeFrom(0);
559 final int commitIndex = 3;
560 final int snapshotIndex = 2;
561 final int snapshotTerm = 1;
563 // set the snapshot variables in replicatedlog
564 actorContext.getReplicatedLog().setSnapshotIndex(snapshotIndex);
565 actorContext.getReplicatedLog().setSnapshotTerm(snapshotTerm);
566 actorContext.setCommitIndex(commitIndex);
567 //set follower timeout to 2 mins, helps during debugging
568 actorContext.setConfigParams(new MockConfigParamsImpl(120000L, 10));
570 leader = new Leader(actorContext);
572 leader.getFollower(FOLLOWER_ID).setMatchIndex(-1);
573 leader.getFollower(FOLLOWER_ID).setNextIndex(0);
575 //update follower timestamp
576 leader.markFollowerActive(FOLLOWER_ID);
578 ByteString bs = toByteString(leadersSnapshot);
579 leader.setSnapshot(Snapshot.create(bs.toByteArray(), Collections.<ReplicatedLogEntry>emptyList(),
580 commitIndex, snapshotTerm, commitIndex, snapshotTerm));
581 LeaderInstallSnapshotState fts = new LeaderInstallSnapshotState(
582 actorContext.getConfigParams().getSnapshotChunkSize(), leader.logName());
583 fts.setSnapshotBytes(bs);
584 leader.getFollower(FOLLOWER_ID).setLeaderInstallSnapshotState(fts);
586 //send first chunk and no InstallSnapshotReply received yet
588 fts.incrementChunkIndex();
590 Uninterruptibles.sleepUninterruptibly(actorContext.getConfigParams().getHeartBeatInterval().toMillis(),
591 TimeUnit.MILLISECONDS);
593 leader.handleMessage(leaderActor, SendHeartBeat.INSTANCE);
595 AppendEntries ae = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
597 assertTrue("AppendEntries should be sent with empty entries", ae.getEntries().isEmpty());
599 //InstallSnapshotReply received
600 fts.markSendStatus(true);
602 leader.handleMessage(leaderActor, SendHeartBeat.INSTANCE);
604 InstallSnapshot is = MessageCollectorActor.expectFirstMatching(followerActor, InstallSnapshot.class);
606 assertEquals(commitIndex, is.getLastIncludedIndex());
610 public void testSendAppendEntriesSnapshotScenario() throws Exception {
611 logStart("testSendAppendEntriesSnapshotScenario");
613 final MockRaftActorContext actorContext = createActorContextWithFollower();
615 Map<String, String> leadersSnapshot = new HashMap<>();
616 leadersSnapshot.put("1", "A");
617 leadersSnapshot.put("2", "B");
618 leadersSnapshot.put("3", "C");
621 actorContext.getReplicatedLog().removeFrom(0);
623 final int followersLastIndex = 2;
624 final int snapshotIndex = 3;
625 final int newEntryIndex = 4;
626 final int snapshotTerm = 1;
627 final int currentTerm = 2;
629 // set the snapshot variables in replicatedlog
630 actorContext.getReplicatedLog().setSnapshotIndex(snapshotIndex);
631 actorContext.getReplicatedLog().setSnapshotTerm(snapshotTerm);
632 actorContext.setCommitIndex(followersLastIndex);
634 leader = new Leader(actorContext);
636 // Leader will send an immediate heartbeat - ignore it.
637 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
640 SimpleReplicatedLogEntry entry =
641 new SimpleReplicatedLogEntry(newEntryIndex, currentTerm,
642 new MockRaftActorContext.MockPayload("D"));
644 actorContext.getReplicatedLog().append(entry);
646 //update follower timestamp
647 leader.markFollowerActive(FOLLOWER_ID);
649 // this should invoke a sendinstallsnapshot as followersLastIndex < snapshotIndex
650 RaftActorBehavior raftBehavior = leader.handleMessage(
651 leaderActor, new Replicate(null, new MockIdentifier("state-id"), entry));
653 assertTrue(raftBehavior instanceof Leader);
655 assertEquals("isCapturing", true, actorContext.getSnapshotManager().isCapturing());
659 public void testInitiateInstallSnapshot() throws Exception {
660 logStart("testInitiateInstallSnapshot");
662 MockRaftActorContext actorContext = createActorContextWithFollower();
665 actorContext.getReplicatedLog().removeFrom(0);
667 final int followersLastIndex = 2;
668 final int snapshotIndex = 3;
669 final int newEntryIndex = 4;
670 final int snapshotTerm = 1;
671 final int currentTerm = 2;
673 // set the snapshot variables in replicatedlog
674 actorContext.getReplicatedLog().setSnapshotIndex(snapshotIndex);
675 actorContext.getReplicatedLog().setSnapshotTerm(snapshotTerm);
676 actorContext.setLastApplied(3);
677 actorContext.setCommitIndex(followersLastIndex);
679 leader = new Leader(actorContext);
681 // Leader will send an immediate heartbeat - ignore it.
682 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
684 // set the snapshot as absent and check if capture-snapshot is invoked.
685 leader.setSnapshot(null);
688 SimpleReplicatedLogEntry entry = new SimpleReplicatedLogEntry(newEntryIndex, currentTerm,
689 new MockRaftActorContext.MockPayload("D"));
691 actorContext.getReplicatedLog().append(entry);
693 //update follower timestamp
694 leader.markFollowerActive(FOLLOWER_ID);
696 leader.handleMessage(leaderActor, new Replicate(null, new MockIdentifier("state-id"), entry));
698 assertEquals("isCapturing", true, actorContext.getSnapshotManager().isCapturing());
700 CaptureSnapshot cs = actorContext.getSnapshotManager().getCaptureSnapshot();
702 assertTrue(cs.isInstallSnapshotInitiated());
703 assertEquals(3, cs.getLastAppliedIndex());
704 assertEquals(1, cs.getLastAppliedTerm());
705 assertEquals(4, cs.getLastIndex());
706 assertEquals(2, cs.getLastTerm());
708 // if an initiate is started again when first is in progress, it shouldnt initiate Capture
709 leader.handleMessage(leaderActor, new Replicate(null, new MockIdentifier("state-id"), entry));
711 assertSame("CaptureSnapshot instance", cs, actorContext.getSnapshotManager().getCaptureSnapshot());
715 public void testInitiateForceInstallSnapshot() throws Exception {
716 logStart("testInitiateForceInstallSnapshot");
718 MockRaftActorContext actorContext = createActorContextWithFollower();
720 final int followersLastIndex = 2;
721 final int snapshotIndex = -1;
722 final int newEntryIndex = 4;
723 final int snapshotTerm = -1;
724 final int currentTerm = 2;
726 // set the snapshot variables in replicatedlog
727 actorContext.getReplicatedLog().setSnapshotIndex(snapshotIndex);
728 actorContext.getReplicatedLog().setSnapshotTerm(snapshotTerm);
729 actorContext.setLastApplied(3);
730 actorContext.setCommitIndex(followersLastIndex);
732 actorContext.getReplicatedLog().removeFrom(0);
734 leader = new Leader(actorContext);
735 actorContext.setCurrentBehavior(leader);
737 // Leader will send an immediate heartbeat - ignore it.
738 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
740 // set the snapshot as absent and check if capture-snapshot is invoked.
741 leader.setSnapshot(null);
743 for (int i = 0; i < 4; i++) {
744 actorContext.getReplicatedLog().append(new SimpleReplicatedLogEntry(i, 1,
745 new MockRaftActorContext.MockPayload("X" + i)));
749 SimpleReplicatedLogEntry entry = new SimpleReplicatedLogEntry(newEntryIndex, currentTerm,
750 new MockRaftActorContext.MockPayload("D"));
752 actorContext.getReplicatedLog().append(entry);
754 //update follower timestamp
755 leader.markFollowerActive(FOLLOWER_ID);
757 // Sending this AppendEntriesReply forces the Leader to capture a snapshot, which subsequently gets
758 // installed with a SendInstallSnapshot
759 leader.handleMessage(leaderActor, new AppendEntriesReply(FOLLOWER_ID, 1, false, 1, 1, (short) 1, true));
761 assertEquals("isCapturing", true, actorContext.getSnapshotManager().isCapturing());
763 CaptureSnapshot cs = actorContext.getSnapshotManager().getCaptureSnapshot();
765 assertTrue(cs.isInstallSnapshotInitiated());
766 assertEquals(3, cs.getLastAppliedIndex());
767 assertEquals(1, cs.getLastAppliedTerm());
768 assertEquals(4, cs.getLastIndex());
769 assertEquals(2, cs.getLastTerm());
771 // if an initiate is started again when first is in progress, it should not initiate Capture
772 leader.handleMessage(leaderActor, new Replicate(null, new MockIdentifier("state-id"), entry));
774 assertSame("CaptureSnapshot instance", cs, actorContext.getSnapshotManager().getCaptureSnapshot());
779 public void testInstallSnapshot() throws Exception {
780 logStart("testInstallSnapshot");
782 final MockRaftActorContext actorContext = createActorContextWithFollower();
784 Map<String, String> leadersSnapshot = new HashMap<>();
785 leadersSnapshot.put("1", "A");
786 leadersSnapshot.put("2", "B");
787 leadersSnapshot.put("3", "C");
790 actorContext.getReplicatedLog().removeFrom(0);
792 final int lastAppliedIndex = 3;
793 final int snapshotIndex = 2;
794 final int snapshotTerm = 1;
795 final int currentTerm = 2;
797 // set the snapshot variables in replicatedlog
798 actorContext.getReplicatedLog().setSnapshotIndex(snapshotIndex);
799 actorContext.getReplicatedLog().setSnapshotTerm(snapshotTerm);
800 actorContext.getTermInformation().update(currentTerm, leaderActor.path().toString());
801 actorContext.setCommitIndex(lastAppliedIndex);
802 actorContext.setLastApplied(lastAppliedIndex);
804 leader = new Leader(actorContext);
806 // Initial heartbeat.
807 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
809 leader.getFollower(FOLLOWER_ID).setMatchIndex(-1);
810 leader.getFollower(FOLLOWER_ID).setNextIndex(0);
812 Snapshot snapshot = Snapshot.create(toByteString(leadersSnapshot).toByteArray(),
813 Collections.<ReplicatedLogEntry>emptyList(),
814 lastAppliedIndex, snapshotTerm, lastAppliedIndex, snapshotTerm);
816 RaftActorBehavior raftBehavior = leader.handleMessage(leaderActor, new SendInstallSnapshot(snapshot));
818 assertTrue(raftBehavior instanceof Leader);
820 // check if installsnapshot gets called with the correct values.
822 InstallSnapshot installSnapshot = MessageCollectorActor.expectFirstMatching(followerActor,
823 InstallSnapshot.class);
825 assertNotNull(installSnapshot.getData());
826 assertEquals(lastAppliedIndex, installSnapshot.getLastIncludedIndex());
827 assertEquals(snapshotTerm, installSnapshot.getLastIncludedTerm());
829 assertEquals(currentTerm, installSnapshot.getTerm());
833 public void testForceInstallSnapshot() throws Exception {
834 logStart("testForceInstallSnapshot");
836 final MockRaftActorContext actorContext = createActorContextWithFollower();
838 Map<String, String> leadersSnapshot = new HashMap<>();
839 leadersSnapshot.put("1", "A");
840 leadersSnapshot.put("2", "B");
841 leadersSnapshot.put("3", "C");
843 final int lastAppliedIndex = 3;
844 final int snapshotIndex = -1;
845 final int snapshotTerm = -1;
846 final int currentTerm = 2;
848 // set the snapshot variables in replicatedlog
849 actorContext.getReplicatedLog().setSnapshotIndex(snapshotIndex);
850 actorContext.getReplicatedLog().setSnapshotTerm(snapshotTerm);
851 actorContext.getTermInformation().update(currentTerm, leaderActor.path().toString());
852 actorContext.setCommitIndex(lastAppliedIndex);
853 actorContext.setLastApplied(lastAppliedIndex);
855 leader = new Leader(actorContext);
857 // Initial heartbeat.
858 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
860 leader.getFollower(FOLLOWER_ID).setMatchIndex(-1);
861 leader.getFollower(FOLLOWER_ID).setNextIndex(-1);
863 Snapshot snapshot = Snapshot.create(toByteString(leadersSnapshot).toByteArray(),
864 Collections.<ReplicatedLogEntry>emptyList(),
865 lastAppliedIndex, snapshotTerm, lastAppliedIndex, snapshotTerm);
867 RaftActorBehavior raftBehavior = leader.handleMessage(leaderActor, new SendInstallSnapshot(snapshot));
869 assertTrue(raftBehavior instanceof Leader);
871 // check if installsnapshot gets called with the correct values.
873 InstallSnapshot installSnapshot = MessageCollectorActor.expectFirstMatching(followerActor,
874 InstallSnapshot.class);
876 assertNotNull(installSnapshot.getData());
877 assertEquals(lastAppliedIndex, installSnapshot.getLastIncludedIndex());
878 assertEquals(snapshotTerm, installSnapshot.getLastIncludedTerm());
880 assertEquals(currentTerm, installSnapshot.getTerm());
884 public void testHandleInstallSnapshotReplyLastChunk() throws Exception {
885 logStart("testHandleInstallSnapshotReplyLastChunk");
887 MockRaftActorContext actorContext = createActorContextWithFollower();
889 final int commitIndex = 3;
890 final int snapshotIndex = 2;
891 final int snapshotTerm = 1;
892 final int currentTerm = 2;
894 actorContext.setCommitIndex(commitIndex);
896 leader = new Leader(actorContext);
897 actorContext.setCurrentBehavior(leader);
899 leader.getFollower(FOLLOWER_ID).setMatchIndex(-1);
900 leader.getFollower(FOLLOWER_ID).setNextIndex(0);
902 // Ignore initial heartbeat.
903 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
905 Map<String, String> leadersSnapshot = new HashMap<>();
906 leadersSnapshot.put("1", "A");
907 leadersSnapshot.put("2", "B");
908 leadersSnapshot.put("3", "C");
910 // set the snapshot variables in replicatedlog
912 actorContext.getReplicatedLog().setSnapshotIndex(snapshotIndex);
913 actorContext.getReplicatedLog().setSnapshotTerm(snapshotTerm);
914 actorContext.getTermInformation().update(currentTerm, leaderActor.path().toString());
916 ByteString bs = toByteString(leadersSnapshot);
917 leader.setSnapshot(Snapshot.create(bs.toByteArray(), Collections.<ReplicatedLogEntry>emptyList(),
918 commitIndex, snapshotTerm, commitIndex, snapshotTerm));
919 LeaderInstallSnapshotState fts = new LeaderInstallSnapshotState(
920 actorContext.getConfigParams().getSnapshotChunkSize(), leader.logName());
921 fts.setSnapshotBytes(bs);
922 leader.getFollower(FOLLOWER_ID).setLeaderInstallSnapshotState(fts);
923 while (!fts.isLastChunk(fts.getChunkIndex())) {
925 fts.incrementChunkIndex();
929 actorContext.getReplicatedLog().removeFrom(0);
931 RaftActorBehavior raftBehavior = leader.handleMessage(followerActor,
932 new InstallSnapshotReply(currentTerm, FOLLOWER_ID, fts.getChunkIndex(), true));
934 assertTrue(raftBehavior instanceof Leader);
936 assertEquals(1, leader.followerLogSize());
937 FollowerLogInformation fli = leader.getFollower(FOLLOWER_ID);
939 assertNull(fli.getInstallSnapshotState());
940 assertEquals(commitIndex, fli.getMatchIndex());
941 assertEquals(commitIndex + 1, fli.getNextIndex());
942 assertFalse(leader.hasSnapshot());
946 public void testSendSnapshotfromInstallSnapshotReply() throws Exception {
947 logStart("testSendSnapshotfromInstallSnapshotReply");
949 MockRaftActorContext actorContext = createActorContextWithFollower();
951 final int commitIndex = 3;
952 final int snapshotIndex = 2;
953 final int snapshotTerm = 1;
954 final int currentTerm = 2;
956 DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl() {
958 public int getSnapshotChunkSize() {
962 configParams.setHeartBeatInterval(new FiniteDuration(9, TimeUnit.SECONDS));
963 configParams.setIsolatedLeaderCheckInterval(new FiniteDuration(10, TimeUnit.SECONDS));
965 actorContext.setConfigParams(configParams);
966 actorContext.setCommitIndex(commitIndex);
968 leader = new Leader(actorContext);
969 actorContext.setCurrentBehavior(leader);
971 leader.getFollower(FOLLOWER_ID).setMatchIndex(-1);
972 leader.getFollower(FOLLOWER_ID).setNextIndex(0);
974 Map<String, String> leadersSnapshot = new HashMap<>();
975 leadersSnapshot.put("1", "A");
976 leadersSnapshot.put("2", "B");
977 leadersSnapshot.put("3", "C");
979 // set the snapshot variables in replicatedlog
980 actorContext.getReplicatedLog().setSnapshotIndex(snapshotIndex);
981 actorContext.getReplicatedLog().setSnapshotTerm(snapshotTerm);
982 actorContext.getTermInformation().update(currentTerm, leaderActor.path().toString());
984 ByteString bs = toByteString(leadersSnapshot);
985 Snapshot snapshot = Snapshot.create(bs.toByteArray(), Collections.<ReplicatedLogEntry>emptyList(),
986 commitIndex, snapshotTerm, commitIndex, snapshotTerm);
987 leader.setSnapshot(snapshot);
989 leader.handleMessage(leaderActor, new SendInstallSnapshot(snapshot));
991 InstallSnapshot installSnapshot = MessageCollectorActor.expectFirstMatching(followerActor,
992 InstallSnapshot.class);
994 assertEquals(1, installSnapshot.getChunkIndex());
995 assertEquals(3, installSnapshot.getTotalChunks());
997 followerActor.underlyingActor().clear();
998 leader.handleMessage(followerActor, new InstallSnapshotReply(actorContext.getTermInformation().getCurrentTerm(),
999 FOLLOWER_ID, installSnapshot.getChunkIndex(), true));
1001 installSnapshot = MessageCollectorActor.expectFirstMatching(followerActor, InstallSnapshot.class);
1003 assertEquals(2, installSnapshot.getChunkIndex());
1004 assertEquals(3, installSnapshot.getTotalChunks());
1006 followerActor.underlyingActor().clear();
1007 leader.handleMessage(followerActor, new InstallSnapshotReply(actorContext.getTermInformation().getCurrentTerm(),
1008 FOLLOWER_ID, installSnapshot.getChunkIndex(), true));
1010 installSnapshot = MessageCollectorActor.expectFirstMatching(followerActor, InstallSnapshot.class);
1012 // Send snapshot reply one more time and make sure that a new snapshot message should not be sent to follower
1013 followerActor.underlyingActor().clear();
1014 leader.handleMessage(followerActor, new InstallSnapshotReply(actorContext.getTermInformation().getCurrentTerm(),
1015 FOLLOWER_ID, installSnapshot.getChunkIndex(), true));
1017 installSnapshot = MessageCollectorActor.getFirstMatching(followerActor, InstallSnapshot.class);
1019 assertNull(installSnapshot);
1024 public void testHandleInstallSnapshotReplyWithInvalidChunkIndex() throws Exception {
1025 logStart("testHandleInstallSnapshotReplyWithInvalidChunkIndex");
1027 MockRaftActorContext actorContext = createActorContextWithFollower();
1029 final int commitIndex = 3;
1030 final int snapshotIndex = 2;
1031 final int snapshotTerm = 1;
1032 final int currentTerm = 2;
1034 actorContext.setConfigParams(new DefaultConfigParamsImpl() {
1036 public int getSnapshotChunkSize() {
1041 actorContext.setCommitIndex(commitIndex);
1043 leader = new Leader(actorContext);
1045 leader.getFollower(FOLLOWER_ID).setMatchIndex(-1);
1046 leader.getFollower(FOLLOWER_ID).setNextIndex(0);
1048 Map<String, String> leadersSnapshot = new HashMap<>();
1049 leadersSnapshot.put("1", "A");
1050 leadersSnapshot.put("2", "B");
1051 leadersSnapshot.put("3", "C");
1053 // set the snapshot variables in replicatedlog
1054 actorContext.getReplicatedLog().setSnapshotIndex(snapshotIndex);
1055 actorContext.getReplicatedLog().setSnapshotTerm(snapshotTerm);
1056 actorContext.getTermInformation().update(currentTerm, leaderActor.path().toString());
1058 ByteString bs = toByteString(leadersSnapshot);
1059 Snapshot snapshot = Snapshot.create(bs.toByteArray(), Collections.<ReplicatedLogEntry>emptyList(),
1060 commitIndex, snapshotTerm, commitIndex, snapshotTerm);
1061 leader.setSnapshot(snapshot);
1063 Uninterruptibles.sleepUninterruptibly(1, TimeUnit.SECONDS);
1064 leader.handleMessage(leaderActor, new SendInstallSnapshot(snapshot));
1066 InstallSnapshot installSnapshot = MessageCollectorActor.expectFirstMatching(followerActor,
1067 InstallSnapshot.class);
1069 assertEquals(1, installSnapshot.getChunkIndex());
1070 assertEquals(3, installSnapshot.getTotalChunks());
1072 followerActor.underlyingActor().clear();
1074 leader.handleMessage(followerActor, new InstallSnapshotReply(actorContext.getTermInformation().getCurrentTerm(),
1075 FOLLOWER_ID, -1, false));
1077 Uninterruptibles.sleepUninterruptibly(actorContext.getConfigParams().getHeartBeatInterval().toMillis(),
1078 TimeUnit.MILLISECONDS);
1080 leader.handleMessage(leaderActor, SendHeartBeat.INSTANCE);
1082 installSnapshot = MessageCollectorActor.expectFirstMatching(followerActor, InstallSnapshot.class);
1084 assertEquals(1, installSnapshot.getChunkIndex());
1085 assertEquals(3, installSnapshot.getTotalChunks());
1089 public void testHandleSnapshotSendsPreviousChunksHashCodeWhenSendingNextChunk() throws Exception {
1090 logStart("testHandleSnapshotSendsPreviousChunksHashCodeWhenSendingNextChunk");
1092 MockRaftActorContext actorContext = createActorContextWithFollower();
1094 final int commitIndex = 3;
1095 final int snapshotIndex = 2;
1096 final int snapshotTerm = 1;
1097 final int currentTerm = 2;
1099 actorContext.setConfigParams(new DefaultConfigParamsImpl() {
1101 public int getSnapshotChunkSize() {
1106 actorContext.setCommitIndex(commitIndex);
1108 leader = new Leader(actorContext);
1110 leader.getFollower(FOLLOWER_ID).setMatchIndex(-1);
1111 leader.getFollower(FOLLOWER_ID).setNextIndex(0);
1113 Map<String, String> leadersSnapshot = new HashMap<>();
1114 leadersSnapshot.put("1", "A");
1115 leadersSnapshot.put("2", "B");
1116 leadersSnapshot.put("3", "C");
1118 // set the snapshot variables in replicatedlog
1119 actorContext.getReplicatedLog().setSnapshotIndex(snapshotIndex);
1120 actorContext.getReplicatedLog().setSnapshotTerm(snapshotTerm);
1121 actorContext.getTermInformation().update(currentTerm, leaderActor.path().toString());
1123 ByteString bs = toByteString(leadersSnapshot);
1124 Snapshot snapshot = Snapshot.create(bs.toByteArray(), Collections.<ReplicatedLogEntry>emptyList(),
1125 commitIndex, snapshotTerm, commitIndex, snapshotTerm);
1126 leader.setSnapshot(snapshot);
1128 leader.handleMessage(leaderActor, new SendInstallSnapshot(snapshot));
1130 InstallSnapshot installSnapshot = MessageCollectorActor.expectFirstMatching(followerActor,
1131 InstallSnapshot.class);
1133 assertEquals(1, installSnapshot.getChunkIndex());
1134 assertEquals(3, installSnapshot.getTotalChunks());
1135 assertEquals(LeaderInstallSnapshotState.INITIAL_LAST_CHUNK_HASH_CODE,
1136 installSnapshot.getLastChunkHashCode().get().intValue());
1138 final int hashCode = Arrays.hashCode(installSnapshot.getData());
1140 followerActor.underlyingActor().clear();
1142 leader.handleMessage(followerActor, new InstallSnapshotReply(installSnapshot.getTerm(),
1143 FOLLOWER_ID, 1, true));
1145 installSnapshot = MessageCollectorActor.expectFirstMatching(followerActor, InstallSnapshot.class);
1147 assertEquals(2, installSnapshot.getChunkIndex());
1148 assertEquals(3, installSnapshot.getTotalChunks());
1149 assertEquals(hashCode, installSnapshot.getLastChunkHashCode().get().intValue());
1153 public void testLeaderInstallSnapshotState() {
1154 logStart("testLeaderInstallSnapshotState");
1156 Map<String, String> leadersSnapshot = new HashMap<>();
1157 leadersSnapshot.put("1", "A");
1158 leadersSnapshot.put("2", "B");
1159 leadersSnapshot.put("3", "C");
1161 ByteString bs = toByteString(leadersSnapshot);
1162 byte[] barray = bs.toByteArray();
1164 LeaderInstallSnapshotState fts = new LeaderInstallSnapshotState(50, "test");
1165 fts.setSnapshotBytes(bs);
1167 assertEquals(bs.size(), barray.length);
1170 for (int i = 0; i < barray.length; i = i + 50) {
1171 int length = i + 50;
1174 if (i + 50 > barray.length) {
1175 length = barray.length;
1178 byte[] chunk = fts.getNextChunk();
1179 assertEquals("bytestring size not matching for chunk:" + chunkIndex, length - i, chunk.length);
1180 assertEquals("chunkindex not matching", chunkIndex, fts.getChunkIndex());
1182 fts.markSendStatus(true);
1183 if (!fts.isLastChunk(chunkIndex)) {
1184 fts.incrementChunkIndex();
1188 assertEquals("totalChunks not matching", chunkIndex, fts.getTotalChunks());
1192 protected Leader createBehavior(final RaftActorContext actorContext) {
1193 return new Leader(actorContext);
1197 protected MockRaftActorContext createActorContext() {
1198 return createActorContext(leaderActor);
1202 protected MockRaftActorContext createActorContext(ActorRef actorRef) {
1203 return createActorContext(LEADER_ID, actorRef);
1206 private MockRaftActorContext createActorContext(String id, ActorRef actorRef) {
1207 DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1208 configParams.setHeartBeatInterval(new FiniteDuration(50, TimeUnit.MILLISECONDS));
1209 configParams.setElectionTimeoutFactor(100000);
1210 MockRaftActorContext context = new MockRaftActorContext(id, getSystem(), actorRef);
1211 context.setConfigParams(configParams);
1212 context.setPayloadVersion(payloadVersion);
1216 private MockRaftActorContext createActorContextWithFollower() {
1217 MockRaftActorContext actorContext = createActorContext();
1218 actorContext.setPeerAddresses(ImmutableMap.<String, String>builder().put(FOLLOWER_ID,
1219 followerActor.path().toString()).build());
1220 return actorContext;
1223 private MockRaftActorContext createFollowerActorContextWithLeader() {
1224 MockRaftActorContext followerActorContext = createActorContext(FOLLOWER_ID, followerActor);
1225 DefaultConfigParamsImpl followerConfig = new DefaultConfigParamsImpl();
1226 followerConfig.setElectionTimeoutFactor(10000);
1227 followerActorContext.setConfigParams(followerConfig);
1228 followerActorContext.setPeerAddresses(ImmutableMap.of(LEADER_ID, leaderActor.path().toString()));
1229 return followerActorContext;
1233 public void testLeaderCreatedWithCommitIndexLessThanLastIndex() throws Exception {
1234 logStart("testLeaderCreatedWithCommitIndexLessThanLastIndex");
1236 final MockRaftActorContext leaderActorContext = createActorContextWithFollower();
1238 MockRaftActorContext followerActorContext = createActorContext(FOLLOWER_ID, followerActor);
1240 Follower follower = new Follower(followerActorContext);
1241 followerActor.underlyingActor().setBehavior(follower);
1242 followerActorContext.setCurrentBehavior(follower);
1244 Map<String, String> peerAddresses = new HashMap<>();
1245 peerAddresses.put(FOLLOWER_ID, followerActor.path().toString());
1247 leaderActorContext.setPeerAddresses(peerAddresses);
1249 leaderActorContext.getReplicatedLog().removeFrom(0);
1252 leaderActorContext.setReplicatedLog(
1253 new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(0, 3, 1).build());
1255 leaderActorContext.setCommitIndex(1);
1257 followerActorContext.getReplicatedLog().removeFrom(0);
1259 // follower too has the exact same log entries and has the same commit index
1260 followerActorContext.setReplicatedLog(
1261 new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(0, 3, 1).build());
1263 followerActorContext.setCommitIndex(1);
1265 leader = new Leader(leaderActorContext);
1266 leaderActorContext.setCurrentBehavior(leader);
1268 AppendEntries appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
1270 assertEquals(-1, appendEntries.getLeaderCommit());
1271 assertEquals(0, appendEntries.getEntries().size());
1272 assertEquals(0, appendEntries.getPrevLogIndex());
1274 AppendEntriesReply appendEntriesReply = MessageCollectorActor.expectFirstMatching(
1275 leaderActor, AppendEntriesReply.class);
1277 assertEquals(2, appendEntriesReply.getLogLastIndex());
1278 assertEquals(1, appendEntriesReply.getLogLastTerm());
1280 // follower returns its next index
1281 assertEquals(2, appendEntriesReply.getLogLastIndex());
1282 assertEquals(1, appendEntriesReply.getLogLastTerm());
1288 public void testLeaderCreatedWithCommitIndexLessThanFollowersCommitIndex() throws Exception {
1289 logStart("testLeaderCreatedWithCommitIndexLessThanFollowersCommitIndex");
1291 final MockRaftActorContext leaderActorContext = createActorContext();
1293 MockRaftActorContext followerActorContext = createActorContext(FOLLOWER_ID, followerActor);
1294 followerActorContext.setPeerAddresses(ImmutableMap.of(LEADER_ID, leaderActor.path().toString()));
1296 Follower follower = new Follower(followerActorContext);
1297 followerActor.underlyingActor().setBehavior(follower);
1298 followerActorContext.setCurrentBehavior(follower);
1300 Map<String, String> leaderPeerAddresses = new HashMap<>();
1301 leaderPeerAddresses.put(FOLLOWER_ID, followerActor.path().toString());
1303 leaderActorContext.setPeerAddresses(leaderPeerAddresses);
1305 leaderActorContext.getReplicatedLog().removeFrom(0);
1307 leaderActorContext.setReplicatedLog(
1308 new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(0, 3, 1).build());
1310 leaderActorContext.setCommitIndex(1);
1312 followerActorContext.getReplicatedLog().removeFrom(0);
1314 followerActorContext.setReplicatedLog(
1315 new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(0, 3, 1).build());
1317 // follower has the same log entries but its commit index > leaders commit index
1318 followerActorContext.setCommitIndex(2);
1320 leader = new Leader(leaderActorContext);
1322 // Initial heartbeat
1323 AppendEntries appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
1325 assertEquals(-1, appendEntries.getLeaderCommit());
1326 assertEquals(0, appendEntries.getEntries().size());
1327 assertEquals(0, appendEntries.getPrevLogIndex());
1329 AppendEntriesReply appendEntriesReply = MessageCollectorActor.expectFirstMatching(
1330 leaderActor, AppendEntriesReply.class);
1332 assertEquals(2, appendEntriesReply.getLogLastIndex());
1333 assertEquals(1, appendEntriesReply.getLogLastTerm());
1335 leaderActor.underlyingActor().setBehavior(follower);
1336 leader.handleMessage(followerActor, appendEntriesReply);
1338 leaderActor.underlyingActor().clear();
1339 followerActor.underlyingActor().clear();
1341 Uninterruptibles.sleepUninterruptibly(leaderActorContext.getConfigParams().getHeartBeatInterval().toMillis(),
1342 TimeUnit.MILLISECONDS);
1344 leader.handleMessage(leaderActor, SendHeartBeat.INSTANCE);
1346 appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
1348 assertEquals(2, appendEntries.getLeaderCommit());
1349 assertEquals(0, appendEntries.getEntries().size());
1350 assertEquals(2, appendEntries.getPrevLogIndex());
1352 appendEntriesReply = MessageCollectorActor.expectFirstMatching(leaderActor, AppendEntriesReply.class);
1354 assertEquals(2, appendEntriesReply.getLogLastIndex());
1355 assertEquals(1, appendEntriesReply.getLogLastTerm());
1357 assertEquals(2, followerActorContext.getCommitIndex());
1363 public void testHandleAppendEntriesReplyFailureWithFollowersLogBehindTheLeader() {
1364 logStart("testHandleAppendEntriesReplyFailureWithFollowersLogBehindTheLeader");
1366 MockRaftActorContext leaderActorContext = createActorContextWithFollower();
1367 ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setHeartBeatInterval(
1368 new FiniteDuration(1000, TimeUnit.SECONDS));
1370 leaderActorContext.setReplicatedLog(
1371 new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(0, 3, 1).build());
1372 long leaderCommitIndex = 2;
1373 leaderActorContext.setCommitIndex(leaderCommitIndex);
1374 leaderActorContext.setLastApplied(leaderCommitIndex);
1376 final ReplicatedLogEntry leadersSecondLogEntry = leaderActorContext.getReplicatedLog().get(1);
1377 final ReplicatedLogEntry leadersThirdLogEntry = leaderActorContext.getReplicatedLog().get(2);
1379 MockRaftActorContext followerActorContext = createFollowerActorContextWithLeader();
1381 followerActorContext.setReplicatedLog(
1382 new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(0, 1, 1).build());
1383 followerActorContext.setCommitIndex(0);
1384 followerActorContext.setLastApplied(0);
1386 Follower follower = new Follower(followerActorContext);
1387 followerActor.underlyingActor().setBehavior(follower);
1389 leader = new Leader(leaderActorContext);
1391 AppendEntries appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
1392 final AppendEntriesReply appendEntriesReply = MessageCollectorActor.expectFirstMatching(leaderActor,
1393 AppendEntriesReply.class);
1395 MessageCollectorActor.clearMessages(followerActor);
1396 MessageCollectorActor.clearMessages(leaderActor);
1398 // Verify initial AppendEntries sent.
1399 assertEquals("getLeaderCommit", -1, appendEntries.getLeaderCommit());
1400 assertEquals("Log entries size", 0, appendEntries.getEntries().size());
1401 assertEquals("getPrevLogIndex", 1, appendEntries.getPrevLogIndex());
1403 leaderActor.underlyingActor().setBehavior(leader);
1405 leader.handleMessage(followerActor, appendEntriesReply);
1407 MessageCollectorActor.expectMatching(leaderActor, AppendEntriesReply.class, 1);
1408 appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
1410 assertEquals("getLeaderCommit", leaderCommitIndex, appendEntries.getLeaderCommit());
1411 assertEquals("getPrevLogIndex", 0, appendEntries.getPrevLogIndex());
1412 assertEquals("Log entries size", 2, appendEntries.getEntries().size());
1414 assertEquals("First entry index", 1, appendEntries.getEntries().get(0).getIndex());
1415 assertEquals("First entry data", leadersSecondLogEntry.getData(),
1416 appendEntries.getEntries().get(0).getData());
1417 assertEquals("Second entry index", 2, appendEntries.getEntries().get(1).getIndex());
1418 assertEquals("Second entry data", leadersThirdLogEntry.getData(),
1419 appendEntries.getEntries().get(1).getData());
1421 FollowerLogInformation followerInfo = leader.getFollower(FOLLOWER_ID);
1422 assertEquals("getNextIndex", 3, followerInfo.getNextIndex());
1424 List<ApplyState> applyStateList = MessageCollectorActor.expectMatching(followerActor, ApplyState.class, 2);
1426 ApplyState applyState = applyStateList.get(0);
1427 assertEquals("Follower's first ApplyState index", 1, applyState.getReplicatedLogEntry().getIndex());
1428 assertEquals("Follower's first ApplyState term", 1, applyState.getReplicatedLogEntry().getTerm());
1429 assertEquals("Follower's first ApplyState data", leadersSecondLogEntry.getData(),
1430 applyState.getReplicatedLogEntry().getData());
1432 applyState = applyStateList.get(1);
1433 assertEquals("Follower's second ApplyState index", 2, applyState.getReplicatedLogEntry().getIndex());
1434 assertEquals("Follower's second ApplyState term", 1, applyState.getReplicatedLogEntry().getTerm());
1435 assertEquals("Follower's second ApplyState data", leadersThirdLogEntry.getData(),
1436 applyState.getReplicatedLogEntry().getData());
1438 assertEquals("Follower's commit index", 2, followerActorContext.getCommitIndex());
1439 assertEquals("Follower's lastIndex", 2, followerActorContext.getReplicatedLog().lastIndex());
1443 public void testHandleAppendEntriesReplyFailureWithFollowersLogEmpty() {
1444 logStart("testHandleAppendEntriesReplyFailureWithFollowersLogEmpty");
1446 MockRaftActorContext leaderActorContext = createActorContextWithFollower();
1447 ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setHeartBeatInterval(
1448 new FiniteDuration(1000, TimeUnit.SECONDS));
1450 leaderActorContext.setReplicatedLog(
1451 new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(0, 2, 1).build());
1452 long leaderCommitIndex = 1;
1453 leaderActorContext.setCommitIndex(leaderCommitIndex);
1454 leaderActorContext.setLastApplied(leaderCommitIndex);
1456 final ReplicatedLogEntry leadersFirstLogEntry = leaderActorContext.getReplicatedLog().get(0);
1457 final ReplicatedLogEntry leadersSecondLogEntry = leaderActorContext.getReplicatedLog().get(1);
1459 MockRaftActorContext followerActorContext = createFollowerActorContextWithLeader();
1461 followerActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
1462 followerActorContext.setCommitIndex(-1);
1463 followerActorContext.setLastApplied(-1);
1465 Follower follower = new Follower(followerActorContext);
1466 followerActor.underlyingActor().setBehavior(follower);
1467 followerActorContext.setCurrentBehavior(follower);
1469 leader = new Leader(leaderActorContext);
1471 AppendEntries appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
1472 final AppendEntriesReply appendEntriesReply = MessageCollectorActor.expectFirstMatching(leaderActor,
1473 AppendEntriesReply.class);
1475 MessageCollectorActor.clearMessages(followerActor);
1476 MessageCollectorActor.clearMessages(leaderActor);
1478 // Verify initial AppendEntries sent with the leader's current commit index.
1479 assertEquals("getLeaderCommit", -1, appendEntries.getLeaderCommit());
1480 assertEquals("Log entries size", 0, appendEntries.getEntries().size());
1481 assertEquals("getPrevLogIndex", 0, appendEntries.getPrevLogIndex());
1483 leaderActor.underlyingActor().setBehavior(leader);
1484 leaderActorContext.setCurrentBehavior(leader);
1486 leader.handleMessage(followerActor, appendEntriesReply);
1488 MessageCollectorActor.expectMatching(leaderActor, AppendEntriesReply.class, 1);
1489 appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
1491 assertEquals("getLeaderCommit", leaderCommitIndex, appendEntries.getLeaderCommit());
1492 assertEquals("getPrevLogIndex", -1, appendEntries.getPrevLogIndex());
1493 assertEquals("Log entries size", 2, appendEntries.getEntries().size());
1495 assertEquals("First entry index", 0, appendEntries.getEntries().get(0).getIndex());
1496 assertEquals("First entry data", leadersFirstLogEntry.getData(),
1497 appendEntries.getEntries().get(0).getData());
1498 assertEquals("Second entry index", 1, appendEntries.getEntries().get(1).getIndex());
1499 assertEquals("Second entry data", leadersSecondLogEntry.getData(),
1500 appendEntries.getEntries().get(1).getData());
1502 FollowerLogInformation followerInfo = leader.getFollower(FOLLOWER_ID);
1503 assertEquals("getNextIndex", 2, followerInfo.getNextIndex());
1505 List<ApplyState> applyStateList = MessageCollectorActor.expectMatching(followerActor, ApplyState.class, 2);
1507 ApplyState applyState = applyStateList.get(0);
1508 assertEquals("Follower's first ApplyState index", 0, applyState.getReplicatedLogEntry().getIndex());
1509 assertEquals("Follower's first ApplyState term", 1, applyState.getReplicatedLogEntry().getTerm());
1510 assertEquals("Follower's first ApplyState data", leadersFirstLogEntry.getData(),
1511 applyState.getReplicatedLogEntry().getData());
1513 applyState = applyStateList.get(1);
1514 assertEquals("Follower's second ApplyState index", 1, applyState.getReplicatedLogEntry().getIndex());
1515 assertEquals("Follower's second ApplyState term", 1, applyState.getReplicatedLogEntry().getTerm());
1516 assertEquals("Follower's second ApplyState data", leadersSecondLogEntry.getData(),
1517 applyState.getReplicatedLogEntry().getData());
1519 assertEquals("Follower's commit index", 1, followerActorContext.getCommitIndex());
1520 assertEquals("Follower's lastIndex", 1, followerActorContext.getReplicatedLog().lastIndex());
1524 public void testHandleAppendEntriesReplyFailureWithFollowersLogTermDifferent() {
1525 logStart("testHandleAppendEntriesReplyFailureWithFollowersLogTermDifferent");
1527 MockRaftActorContext leaderActorContext = createActorContextWithFollower();
1528 ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setHeartBeatInterval(
1529 new FiniteDuration(1000, TimeUnit.SECONDS));
1531 leaderActorContext.setReplicatedLog(
1532 new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(0, 2, 2).build());
1533 long leaderCommitIndex = 1;
1534 leaderActorContext.setCommitIndex(leaderCommitIndex);
1535 leaderActorContext.setLastApplied(leaderCommitIndex);
1537 final ReplicatedLogEntry leadersFirstLogEntry = leaderActorContext.getReplicatedLog().get(0);
1538 final ReplicatedLogEntry leadersSecondLogEntry = leaderActorContext.getReplicatedLog().get(1);
1540 MockRaftActorContext followerActorContext = createFollowerActorContextWithLeader();
1542 followerActorContext.setReplicatedLog(
1543 new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(0, 1, 1).build());
1544 followerActorContext.setCommitIndex(-1);
1545 followerActorContext.setLastApplied(-1);
1547 Follower follower = new Follower(followerActorContext);
1548 followerActor.underlyingActor().setBehavior(follower);
1549 followerActorContext.setCurrentBehavior(follower);
1551 leader = new Leader(leaderActorContext);
1553 AppendEntries appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
1554 final AppendEntriesReply appendEntriesReply = MessageCollectorActor.expectFirstMatching(leaderActor,
1555 AppendEntriesReply.class);
1557 MessageCollectorActor.clearMessages(followerActor);
1558 MessageCollectorActor.clearMessages(leaderActor);
1560 // Verify initial AppendEntries sent with the leader's current commit index.
1561 assertEquals("getLeaderCommit", -1, appendEntries.getLeaderCommit());
1562 assertEquals("Log entries size", 0, appendEntries.getEntries().size());
1563 assertEquals("getPrevLogIndex", 0, appendEntries.getPrevLogIndex());
1565 leaderActor.underlyingActor().setBehavior(leader);
1566 leaderActorContext.setCurrentBehavior(leader);
1568 leader.handleMessage(followerActor, appendEntriesReply);
1570 MessageCollectorActor.expectMatching(leaderActor, AppendEntriesReply.class, 1);
1571 appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
1573 assertEquals("getLeaderCommit", leaderCommitIndex, appendEntries.getLeaderCommit());
1574 assertEquals("getPrevLogIndex", -1, appendEntries.getPrevLogIndex());
1575 assertEquals("Log entries size", 2, appendEntries.getEntries().size());
1577 assertEquals("First entry index", 0, appendEntries.getEntries().get(0).getIndex());
1578 assertEquals("First entry term", 2, appendEntries.getEntries().get(0).getTerm());
1579 assertEquals("First entry data", leadersFirstLogEntry.getData(),
1580 appendEntries.getEntries().get(0).getData());
1581 assertEquals("Second entry index", 1, appendEntries.getEntries().get(1).getIndex());
1582 assertEquals("Second entry term", 2, appendEntries.getEntries().get(1).getTerm());
1583 assertEquals("Second entry data", leadersSecondLogEntry.getData(),
1584 appendEntries.getEntries().get(1).getData());
1586 FollowerLogInformation followerInfo = leader.getFollower(FOLLOWER_ID);
1587 assertEquals("getNextIndex", 2, followerInfo.getNextIndex());
1589 List<ApplyState> applyStateList = MessageCollectorActor.expectMatching(followerActor, ApplyState.class, 2);
1591 ApplyState applyState = applyStateList.get(0);
1592 assertEquals("Follower's first ApplyState index", 0, applyState.getReplicatedLogEntry().getIndex());
1593 assertEquals("Follower's first ApplyState term", 2, applyState.getReplicatedLogEntry().getTerm());
1594 assertEquals("Follower's first ApplyState data", leadersFirstLogEntry.getData(),
1595 applyState.getReplicatedLogEntry().getData());
1597 applyState = applyStateList.get(1);
1598 assertEquals("Follower's second ApplyState index", 1, applyState.getReplicatedLogEntry().getIndex());
1599 assertEquals("Follower's second ApplyState term", 2, applyState.getReplicatedLogEntry().getTerm());
1600 assertEquals("Follower's second ApplyState data", leadersSecondLogEntry.getData(),
1601 applyState.getReplicatedLogEntry().getData());
1603 assertEquals("Follower's commit index", 1, followerActorContext.getCommitIndex());
1604 assertEquals("Follower's lastIndex", 1, followerActorContext.getReplicatedLog().lastIndex());
1605 assertEquals("Follower's lastTerm", 2, followerActorContext.getReplicatedLog().lastTerm());
1609 public void testHandleAppendEntriesReplyWithNewerTerm() {
1610 logStart("testHandleAppendEntriesReplyWithNewerTerm");
1612 MockRaftActorContext leaderActorContext = createActorContext();
1613 ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setHeartBeatInterval(
1614 new FiniteDuration(10000, TimeUnit.SECONDS));
1616 leaderActorContext.setReplicatedLog(
1617 new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(0, 2, 2).build());
1619 leader = new Leader(leaderActorContext);
1620 leaderActor.underlyingActor().setBehavior(leader);
1621 leaderActor.tell(new AppendEntriesReply("foo", 20, false, 1000, 10, (short) 1), ActorRef.noSender());
1623 AppendEntriesReply appendEntriesReply = MessageCollectorActor.expectFirstMatching(leaderActor,
1624 AppendEntriesReply.class);
1626 assertEquals(false, appendEntriesReply.isSuccess());
1627 assertEquals(RaftState.Follower, leaderActor.underlyingActor().getFirstBehaviorChange().state());
1629 MessageCollectorActor.clearMessages(leaderActor);
1633 public void testHandleAppendEntriesReplyWithNewerTermWhenElectionsAreDisabled() {
1634 logStart("testHandleAppendEntriesReplyWithNewerTermWhenElectionsAreDisabled");
1636 MockRaftActorContext leaderActorContext = createActorContext();
1637 ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setHeartBeatInterval(
1638 new FiniteDuration(10000, TimeUnit.SECONDS));
1640 leaderActorContext.setReplicatedLog(
1641 new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(0, 2, 2).build());
1642 leaderActorContext.setRaftPolicy(createRaftPolicy(false, false));
1644 leader = new Leader(leaderActorContext);
1645 leaderActor.underlyingActor().setBehavior(leader);
1646 leaderActor.tell(new AppendEntriesReply("foo", 20, false, 1000, 10, (short) 1), ActorRef.noSender());
1648 AppendEntriesReply appendEntriesReply = MessageCollectorActor.expectFirstMatching(leaderActor,
1649 AppendEntriesReply.class);
1651 assertEquals(false, appendEntriesReply.isSuccess());
1652 assertEquals(RaftState.Leader, leaderActor.underlyingActor().getFirstBehaviorChange().state());
1654 MessageCollectorActor.clearMessages(leaderActor);
1658 public void testHandleAppendEntriesReplySuccess() throws Exception {
1659 logStart("testHandleAppendEntriesReplySuccess");
1661 MockRaftActorContext leaderActorContext = createActorContextWithFollower();
1663 leaderActorContext.setReplicatedLog(
1664 new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(0, 3, 1).build());
1666 leaderActorContext.setCommitIndex(1);
1667 leaderActorContext.setLastApplied(1);
1668 leaderActorContext.getTermInformation().update(1, "leader");
1670 leader = new Leader(leaderActorContext);
1672 FollowerLogInformation followerInfo = leader.getFollower(FOLLOWER_ID);
1674 assertEquals(payloadVersion, leader.getLeaderPayloadVersion());
1675 assertEquals(RaftVersions.HELIUM_VERSION, followerInfo.getRaftVersion());
1677 AppendEntriesReply reply = new AppendEntriesReply(FOLLOWER_ID, 1, true, 2, 1, payloadVersion);
1679 RaftActorBehavior raftActorBehavior = leader.handleAppendEntriesReply(followerActor, reply);
1681 assertEquals(RaftState.Leader, raftActorBehavior.state());
1683 assertEquals(2, leaderActorContext.getCommitIndex());
1685 ApplyJournalEntries applyJournalEntries = MessageCollectorActor.expectFirstMatching(
1686 leaderActor, ApplyJournalEntries.class);
1688 assertEquals(2, leaderActorContext.getLastApplied());
1690 assertEquals(2, applyJournalEntries.getToIndex());
1692 List<ApplyState> applyStateList = MessageCollectorActor.getAllMatching(leaderActor,
1695 assertEquals(1,applyStateList.size());
1697 ApplyState applyState = applyStateList.get(0);
1699 assertEquals(2, applyState.getReplicatedLogEntry().getIndex());
1701 assertEquals(2, followerInfo.getMatchIndex());
1702 assertEquals(3, followerInfo.getNextIndex());
1703 assertEquals(payloadVersion, followerInfo.getPayloadVersion());
1704 assertEquals(RaftVersions.CURRENT_VERSION, followerInfo.getRaftVersion());
1708 public void testHandleAppendEntriesReplyUnknownFollower() {
1709 logStart("testHandleAppendEntriesReplyUnknownFollower");
1711 MockRaftActorContext leaderActorContext = createActorContext();
1713 leader = new Leader(leaderActorContext);
1715 AppendEntriesReply reply = new AppendEntriesReply("unkown-follower", 1, false, 10, 1, (short)0);
1717 RaftActorBehavior raftActorBehavior = leader.handleAppendEntriesReply(followerActor, reply);
1719 assertEquals(RaftState.Leader, raftActorBehavior.state());
1723 public void testFollowerCatchUpWithAppendEntriesMaxDataSizeExceeded() {
1724 logStart("testFollowerCatchUpWithAppendEntriesMaxDataSizeExceeded");
1726 MockRaftActorContext leaderActorContext = createActorContextWithFollower();
1727 ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setHeartBeatInterval(
1728 new FiniteDuration(1000, TimeUnit.SECONDS));
1729 ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setSnapshotChunkSize(2);
1731 leaderActorContext.setReplicatedLog(
1732 new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(0, 4, 1).build());
1733 long leaderCommitIndex = 3;
1734 leaderActorContext.setCommitIndex(leaderCommitIndex);
1735 leaderActorContext.setLastApplied(leaderCommitIndex);
1737 final ReplicatedLogEntry leadersFirstLogEntry = leaderActorContext.getReplicatedLog().get(0);
1738 final ReplicatedLogEntry leadersSecondLogEntry = leaderActorContext.getReplicatedLog().get(1);
1739 final ReplicatedLogEntry leadersThirdLogEntry = leaderActorContext.getReplicatedLog().get(2);
1740 final ReplicatedLogEntry leadersFourthLogEntry = leaderActorContext.getReplicatedLog().get(3);
1742 MockRaftActorContext followerActorContext = createFollowerActorContextWithLeader();
1744 followerActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
1745 followerActorContext.setCommitIndex(-1);
1746 followerActorContext.setLastApplied(-1);
1748 Follower follower = new Follower(followerActorContext);
1749 followerActor.underlyingActor().setBehavior(follower);
1750 followerActorContext.setCurrentBehavior(follower);
1752 leader = new Leader(leaderActorContext);
1754 AppendEntries appendEntries = MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
1755 final AppendEntriesReply appendEntriesReply = MessageCollectorActor.expectFirstMatching(leaderActor,
1756 AppendEntriesReply.class);
1758 MessageCollectorActor.clearMessages(followerActor);
1759 MessageCollectorActor.clearMessages(leaderActor);
1761 // Verify initial AppendEntries sent with the leader's current commit index.
1762 assertEquals("getLeaderCommit", -1, appendEntries.getLeaderCommit());
1763 assertEquals("Log entries size", 0, appendEntries.getEntries().size());
1764 assertEquals("getPrevLogIndex", 2, appendEntries.getPrevLogIndex());
1766 leaderActor.underlyingActor().setBehavior(leader);
1767 leaderActorContext.setCurrentBehavior(leader);
1769 leader.handleMessage(followerActor, appendEntriesReply);
1771 List<AppendEntries> appendEntriesList = MessageCollectorActor.expectMatching(followerActor,
1772 AppendEntries.class, 2);
1773 MessageCollectorActor.expectMatching(leaderActor, AppendEntriesReply.class, 2);
1775 appendEntries = appendEntriesList.get(0);
1776 assertEquals("getLeaderCommit", leaderCommitIndex, appendEntries.getLeaderCommit());
1777 assertEquals("getPrevLogIndex", -1, appendEntries.getPrevLogIndex());
1778 assertEquals("Log entries size", 2, appendEntries.getEntries().size());
1780 assertEquals("First entry index", 0, appendEntries.getEntries().get(0).getIndex());
1781 assertEquals("First entry data", leadersFirstLogEntry.getData(),
1782 appendEntries.getEntries().get(0).getData());
1783 assertEquals("Second entry index", 1, appendEntries.getEntries().get(1).getIndex());
1784 assertEquals("Second entry data", leadersSecondLogEntry.getData(),
1785 appendEntries.getEntries().get(1).getData());
1787 appendEntries = appendEntriesList.get(1);
1788 assertEquals("getLeaderCommit", leaderCommitIndex, appendEntries.getLeaderCommit());
1789 assertEquals("getPrevLogIndex", 1, appendEntries.getPrevLogIndex());
1790 assertEquals("Log entries size", 2, appendEntries.getEntries().size());
1792 assertEquals("First entry index", 2, appendEntries.getEntries().get(0).getIndex());
1793 assertEquals("First entry data", leadersThirdLogEntry.getData(),
1794 appendEntries.getEntries().get(0).getData());
1795 assertEquals("Second entry index", 3, appendEntries.getEntries().get(1).getIndex());
1796 assertEquals("Second entry data", leadersFourthLogEntry.getData(),
1797 appendEntries.getEntries().get(1).getData());
1799 FollowerLogInformation followerInfo = leader.getFollower(FOLLOWER_ID);
1800 assertEquals("getNextIndex", 4, followerInfo.getNextIndex());
1802 MessageCollectorActor.expectMatching(followerActor, ApplyState.class, 4);
1804 assertEquals("Follower's commit index", 3, followerActorContext.getCommitIndex());
1805 assertEquals("Follower's lastIndex", 3, followerActorContext.getReplicatedLog().lastIndex());
1809 public void testHandleRequestVoteReply() {
1810 logStart("testHandleRequestVoteReply");
1812 MockRaftActorContext leaderActorContext = createActorContext();
1814 leader = new Leader(leaderActorContext);
1816 // Should be a no-op.
1817 RaftActorBehavior raftActorBehavior = leader.handleRequestVoteReply(followerActor,
1818 new RequestVoteReply(1, true));
1820 assertEquals(RaftState.Leader, raftActorBehavior.state());
1822 raftActorBehavior = leader.handleRequestVoteReply(followerActor, new RequestVoteReply(1, false));
1824 assertEquals(RaftState.Leader, raftActorBehavior.state());
1828 public void testIsolatedLeaderCheckNoFollowers() {
1829 logStart("testIsolatedLeaderCheckNoFollowers");
1831 MockRaftActorContext leaderActorContext = createActorContext();
1833 leader = new Leader(leaderActorContext);
1834 RaftActorBehavior newBehavior = leader.handleMessage(leaderActor, Leader.ISOLATED_LEADER_CHECK);
1835 assertTrue(newBehavior instanceof Leader);
1839 public void testIsolatedLeaderCheckNoVotingFollowers() {
1840 logStart("testIsolatedLeaderCheckNoVotingFollowers");
1842 MockRaftActorContext followerActorContext = createFollowerActorContextWithLeader();
1843 Follower follower = new Follower(followerActorContext);
1844 followerActor.underlyingActor().setBehavior(follower);
1846 MockRaftActorContext leaderActorContext = createActorContextWithFollower();
1847 ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setHeartBeatInterval(
1848 new FiniteDuration(1000, TimeUnit.SECONDS));
1849 leaderActorContext.getPeerInfo(FOLLOWER_ID).setVotingState(VotingState.NON_VOTING);
1851 leader = new Leader(leaderActorContext);
1852 leader.getFollower(FOLLOWER_ID).markFollowerActive();
1853 RaftActorBehavior newBehavior = leader.handleMessage(leaderActor, Leader.ISOLATED_LEADER_CHECK);
1854 assertTrue("Expected Leader", newBehavior instanceof Leader);
1857 private RaftActorBehavior setupIsolatedLeaderCheckTestWithTwoFollowers(RaftPolicy raftPolicy) {
1858 ActorRef followerActor1 = getSystem().actorOf(MessageCollectorActor.props(), "follower-1");
1859 ActorRef followerActor2 = getSystem().actorOf(MessageCollectorActor.props(), "follower-2");
1861 MockRaftActorContext leaderActorContext = createActorContext();
1863 Map<String, String> peerAddresses = new HashMap<>();
1864 peerAddresses.put("follower-1", followerActor1.path().toString());
1865 peerAddresses.put("follower-2", followerActor2.path().toString());
1867 leaderActorContext.setPeerAddresses(peerAddresses);
1868 leaderActorContext.setRaftPolicy(raftPolicy);
1870 leader = new Leader(leaderActorContext);
1872 leader.markFollowerActive("follower-1");
1873 leader.markFollowerActive("follower-2");
1874 RaftActorBehavior newBehavior = leader.handleMessage(leaderActor, Leader.ISOLATED_LEADER_CHECK);
1875 assertTrue("Behavior not instance of Leader when all followers are active", newBehavior instanceof Leader);
1877 // kill 1 follower and verify if that got killed
1878 final JavaTestKit probe = new JavaTestKit(getSystem());
1879 probe.watch(followerActor1);
1880 followerActor1.tell(PoisonPill.getInstance(), ActorRef.noSender());
1881 final Terminated termMsg1 = probe.expectMsgClass(Terminated.class);
1882 assertEquals(termMsg1.getActor(), followerActor1);
1884 leader.markFollowerInActive("follower-1");
1885 leader.markFollowerActive("follower-2");
1886 newBehavior = leader.handleMessage(leaderActor, Leader.ISOLATED_LEADER_CHECK);
1887 assertTrue("Behavior not instance of Leader when majority of followers are active",
1888 newBehavior instanceof Leader);
1890 // kill 2nd follower and leader should change to Isolated leader
1891 followerActor2.tell(PoisonPill.getInstance(), null);
1892 probe.watch(followerActor2);
1893 followerActor2.tell(PoisonPill.getInstance(), ActorRef.noSender());
1894 final Terminated termMsg2 = probe.expectMsgClass(Terminated.class);
1895 assertEquals(termMsg2.getActor(), followerActor2);
1897 leader.markFollowerInActive("follower-2");
1898 return leader.handleMessage(leaderActor, Leader.ISOLATED_LEADER_CHECK);
1902 public void testIsolatedLeaderCheckTwoFollowers() throws Exception {
1903 logStart("testIsolatedLeaderCheckTwoFollowers");
1905 RaftActorBehavior newBehavior = setupIsolatedLeaderCheckTestWithTwoFollowers(DefaultRaftPolicy.INSTANCE);
1907 assertTrue("Behavior not instance of IsolatedLeader when majority followers are inactive",
1908 newBehavior instanceof IsolatedLeader);
1912 public void testIsolatedLeaderCheckTwoFollowersWhenElectionsAreDisabled() throws Exception {
1913 logStart("testIsolatedLeaderCheckTwoFollowersWhenElectionsAreDisabled");
1915 RaftActorBehavior newBehavior = setupIsolatedLeaderCheckTestWithTwoFollowers(createRaftPolicy(false, true));
1917 assertTrue("Behavior should not switch to IsolatedLeader because elections are disabled",
1918 newBehavior instanceof Leader);
1922 public void testLaggingFollowerStarvation() throws Exception {
1923 logStart("testLaggingFollowerStarvation");
1925 String leaderActorId = actorFactory.generateActorId("leader");
1926 String follower1ActorId = actorFactory.generateActorId("follower");
1927 String follower2ActorId = actorFactory.generateActorId("follower");
1929 final ActorRef follower1Actor = actorFactory.createActor(MessageCollectorActor.props(), follower1ActorId);
1930 final ActorRef follower2Actor = actorFactory.createActor(MessageCollectorActor.props(), follower2ActorId);
1932 MockRaftActorContext leaderActorContext =
1933 new MockRaftActorContext(leaderActorId, getSystem(), leaderActor);
1935 DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1936 configParams.setHeartBeatInterval(new FiniteDuration(200, TimeUnit.MILLISECONDS));
1937 configParams.setIsolatedLeaderCheckInterval(new FiniteDuration(10, TimeUnit.SECONDS));
1939 leaderActorContext.setConfigParams(configParams);
1941 leaderActorContext.setReplicatedLog(
1942 new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(1,5,1).build());
1944 Map<String, String> peerAddresses = new HashMap<>();
1945 peerAddresses.put(follower1ActorId,
1946 follower1Actor.path().toString());
1947 peerAddresses.put(follower2ActorId,
1948 follower2Actor.path().toString());
1950 leaderActorContext.setPeerAddresses(peerAddresses);
1951 leaderActorContext.getTermInformation().update(1, leaderActorId);
1953 leader = createBehavior(leaderActorContext);
1955 leaderActor.underlyingActor().setBehavior(leader);
1957 for (int i = 1; i < 6; i++) {
1958 // Each AppendEntriesReply could end up rescheduling the heartbeat (without the fix for bug 2733)
1959 RaftActorBehavior newBehavior = leader.handleMessage(follower1Actor,
1960 new AppendEntriesReply(follower1ActorId, 1, true, i, 1, (short)0));
1961 assertTrue(newBehavior == leader);
1962 Uninterruptibles.sleepUninterruptibly(200, TimeUnit.MILLISECONDS);
1965 // Check if the leader has been receiving SendHeartbeat messages despite getting AppendEntriesReply
1966 List<SendHeartBeat> heartbeats = MessageCollectorActor.getAllMatching(leaderActor, SendHeartBeat.class);
1968 assertTrue(String.format("%s heartbeat(s) is less than expected", heartbeats.size()),
1969 heartbeats.size() > 1);
1971 // Check if follower-2 got AppendEntries during this time and was not starved
1972 List<AppendEntries> appendEntries = MessageCollectorActor.getAllMatching(follower2Actor, AppendEntries.class);
1974 assertTrue(String.format("%s append entries is less than expected", appendEntries.size()),
1975 appendEntries.size() > 1);
1979 public void testReplicationConsensusWithNonVotingFollower() {
1980 logStart("testReplicationConsensusWithNonVotingFollower");
1982 MockRaftActorContext leaderActorContext = createActorContextWithFollower();
1983 ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setHeartBeatInterval(
1984 new FiniteDuration(1000, TimeUnit.SECONDS));
1986 leaderActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
1987 leaderActorContext.setCommitIndex(-1);
1988 leaderActorContext.setLastApplied(-1);
1990 String nonVotingFollowerId = "nonvoting-follower";
1991 TestActorRef<ForwardMessageToBehaviorActor> nonVotingFollowerActor = actorFactory.createTestActor(
1992 Props.create(MessageCollectorActor.class), actorFactory.generateActorId(nonVotingFollowerId));
1994 leaderActorContext.addToPeers(nonVotingFollowerId, nonVotingFollowerActor.path().toString(),
1995 VotingState.NON_VOTING);
1997 leader = new Leader(leaderActorContext);
1998 leaderActorContext.setCurrentBehavior(leader);
2000 // Ignore initial heartbeats
2001 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
2002 MessageCollectorActor.expectFirstMatching(nonVotingFollowerActor, AppendEntries.class);
2004 MessageCollectorActor.clearMessages(followerActor);
2005 MessageCollectorActor.clearMessages(nonVotingFollowerActor);
2006 MessageCollectorActor.clearMessages(leaderActor);
2008 // Send a Replicate message and wait for AppendEntries.
2009 sendReplicate(leaderActorContext, 0);
2011 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
2012 MessageCollectorActor.expectFirstMatching(nonVotingFollowerActor, AppendEntries.class);
2014 // Send reply only from the voting follower and verify consensus via ApplyState.
2015 leader.handleMessage(leaderActor, new AppendEntriesReply(FOLLOWER_ID, 1, true, 0, 1, (short)0));
2017 MessageCollectorActor.expectFirstMatching(leaderActor, ApplyState.class);
2019 leader.handleMessage(leaderActor, new AppendEntriesReply(nonVotingFollowerId, 1, true, 0, 1, (short)0));
2021 MessageCollectorActor.clearMessages(followerActor);
2022 MessageCollectorActor.clearMessages(nonVotingFollowerActor);
2023 MessageCollectorActor.clearMessages(leaderActor);
2025 // Send another Replicate message
2026 sendReplicate(leaderActorContext, 1);
2028 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
2029 AppendEntries appendEntries = MessageCollectorActor.expectFirstMatching(nonVotingFollowerActor,
2030 AppendEntries.class);
2031 assertEquals("Log entries size", 1, appendEntries.getEntries().size());
2032 assertEquals("Log entry index", 1, appendEntries.getEntries().get(0).getIndex());
2034 // Send reply only from the non-voting follower and verify no consensus via no ApplyState.
2035 leader.handleMessage(leaderActor, new AppendEntriesReply(nonVotingFollowerId, 1, true, 1, 1, (short)0));
2037 MessageCollectorActor.assertNoneMatching(leaderActor, ApplyState.class, 500);
2039 // Send reply from the voting follower and verify consensus.
2040 leader.handleMessage(leaderActor, new AppendEntriesReply(FOLLOWER_ID, 1, true, 1, 1, (short)0));
2042 MessageCollectorActor.expectFirstMatching(leaderActor, ApplyState.class);
2046 public void testTransferLeadershipWithFollowerInSync() {
2047 logStart("testTransferLeadershipWithFollowerInSync");
2049 MockRaftActorContext leaderActorContext = createActorContextWithFollower();
2050 leaderActorContext.setLastApplied(-1);
2051 ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setHeartBeatInterval(
2052 new FiniteDuration(1000, TimeUnit.SECONDS));
2053 leaderActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
2055 leader = new Leader(leaderActorContext);
2056 leaderActorContext.setCurrentBehavior(leader);
2058 // Initial heartbeat
2059 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
2060 leader.handleMessage(leaderActor, new AppendEntriesReply(FOLLOWER_ID, 1, true, -1, -1, (short)0));
2061 MessageCollectorActor.clearMessages(followerActor);
2063 sendReplicate(leaderActorContext, 0);
2064 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
2066 leader.handleMessage(leaderActor, new AppendEntriesReply(FOLLOWER_ID, 1, true, 0, 1, (short)0));
2067 MessageCollectorActor.expectFirstMatching(leaderActor, ApplyState.class);
2068 MessageCollectorActor.clearMessages(followerActor);
2070 RaftActorLeadershipTransferCohort mockTransferCohort = mock(RaftActorLeadershipTransferCohort.class);
2071 leader.transferLeadership(mockTransferCohort);
2073 verify(mockTransferCohort, never()).transferComplete();
2074 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
2075 leader.handleMessage(leaderActor, new AppendEntriesReply(FOLLOWER_ID, 1, true, 0, 1, (short)0));
2077 // Expect a final AppendEntries to ensure the follower's lastApplied index is up-to-date
2078 MessageCollectorActor.expectMatching(followerActor, AppendEntries.class, 2);
2080 // Leader should force an election timeout
2081 MessageCollectorActor.expectFirstMatching(followerActor, TimeoutNow.class);
2083 verify(mockTransferCohort).transferComplete();
2087 public void testTransferLeadershipWithEmptyLog() {
2088 logStart("testTransferLeadershipWithEmptyLog");
2090 MockRaftActorContext leaderActorContext = createActorContextWithFollower();
2091 ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setHeartBeatInterval(
2092 new FiniteDuration(1000, TimeUnit.SECONDS));
2093 leaderActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
2095 leader = new Leader(leaderActorContext);
2096 leaderActorContext.setCurrentBehavior(leader);
2098 // Initial heartbeat
2099 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
2100 leader.handleMessage(leaderActor, new AppendEntriesReply(FOLLOWER_ID, 1, true, -1, -1, (short)0));
2101 MessageCollectorActor.clearMessages(followerActor);
2103 RaftActorLeadershipTransferCohort mockTransferCohort = mock(RaftActorLeadershipTransferCohort.class);
2104 leader.transferLeadership(mockTransferCohort);
2106 verify(mockTransferCohort, never()).transferComplete();
2107 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
2108 leader.handleMessage(leaderActor, new AppendEntriesReply(FOLLOWER_ID, 1, true, -1, -1, (short)0));
2110 // Expect a final AppendEntries to ensure the follower's lastApplied index is up-to-date
2111 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
2113 // Leader should force an election timeout
2114 MessageCollectorActor.expectFirstMatching(followerActor, TimeoutNow.class);
2116 verify(mockTransferCohort).transferComplete();
2120 public void testTransferLeadershipWithFollowerInitiallyOutOfSync() {
2121 logStart("testTransferLeadershipWithFollowerInitiallyOutOfSync");
2123 MockRaftActorContext leaderActorContext = createActorContextWithFollower();
2124 ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setHeartBeatInterval(
2125 new FiniteDuration(200, TimeUnit.MILLISECONDS));
2127 leader = new Leader(leaderActorContext);
2128 leaderActorContext.setCurrentBehavior(leader);
2130 // Initial heartbeat
2131 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
2132 MessageCollectorActor.clearMessages(followerActor);
2134 RaftActorLeadershipTransferCohort mockTransferCohort = mock(RaftActorLeadershipTransferCohort.class);
2135 leader.transferLeadership(mockTransferCohort);
2137 verify(mockTransferCohort, never()).transferComplete();
2139 // Sync up the follower.
2140 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
2141 leader.handleMessage(leaderActor, new AppendEntriesReply(FOLLOWER_ID, 1, true, -1, -1, (short)0));
2142 MessageCollectorActor.clearMessages(followerActor);
2144 Uninterruptibles.sleepUninterruptibly(leaderActorContext.getConfigParams()
2145 .getHeartBeatInterval().toMillis() + 1, TimeUnit.MILLISECONDS);
2146 leader.handleMessage(leaderActor, SendHeartBeat.INSTANCE);
2147 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
2148 leader.handleMessage(leaderActor, new AppendEntriesReply(FOLLOWER_ID, 1, true, 1, 1, (short)0));
2150 // Leader should force an election timeout
2151 MessageCollectorActor.expectFirstMatching(followerActor, TimeoutNow.class);
2153 verify(mockTransferCohort).transferComplete();
2157 public void testTransferLeadershipWithFollowerSyncTimeout() {
2158 logStart("testTransferLeadershipWithFollowerSyncTimeout");
2160 MockRaftActorContext leaderActorContext = createActorContextWithFollower();
2161 ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setHeartBeatInterval(
2162 new FiniteDuration(200, TimeUnit.MILLISECONDS));
2163 ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(2);
2164 leaderActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
2166 leader = new Leader(leaderActorContext);
2167 leaderActorContext.setCurrentBehavior(leader);
2169 // Initial heartbeat
2170 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
2171 leader.handleMessage(leaderActor, new AppendEntriesReply(FOLLOWER_ID, 1, true, -1, -1, (short)0));
2172 MessageCollectorActor.clearMessages(followerActor);
2174 sendReplicate(leaderActorContext, 0);
2175 MessageCollectorActor.expectFirstMatching(followerActor, AppendEntries.class);
2177 MessageCollectorActor.clearMessages(followerActor);
2179 RaftActorLeadershipTransferCohort mockTransferCohort = mock(RaftActorLeadershipTransferCohort.class);
2180 leader.transferLeadership(mockTransferCohort);
2182 verify(mockTransferCohort, never()).transferComplete();
2184 // Send heartbeats to time out the transfer.
2185 for (int i = 0; i < leaderActorContext.getConfigParams().getElectionTimeoutFactor(); i++) {
2186 Uninterruptibles.sleepUninterruptibly(leaderActorContext.getConfigParams()
2187 .getHeartBeatInterval().toMillis() + 1, TimeUnit.MILLISECONDS);
2188 leader.handleMessage(leaderActor, SendHeartBeat.INSTANCE);
2191 verify(mockTransferCohort).abortTransfer();
2192 verify(mockTransferCohort, never()).transferComplete();
2193 MessageCollectorActor.assertNoneMatching(followerActor, ElectionTimeout.class, 100);
2197 protected void assertStateChangesToFollowerWhenRaftRPCHasNewerTerm(MockRaftActorContext actorContext,
2198 ActorRef actorRef, RaftRPC rpc) throws Exception {
2199 super.assertStateChangesToFollowerWhenRaftRPCHasNewerTerm(actorContext, actorRef, rpc);
2200 assertEquals("New votedFor", null, actorContext.getTermInformation().getVotedFor());
2203 private class MockConfigParamsImpl extends DefaultConfigParamsImpl {
2205 private final long electionTimeOutIntervalMillis;
2206 private final int snapshotChunkSize;
2208 MockConfigParamsImpl(long electionTimeOutIntervalMillis, int snapshotChunkSize) {
2210 this.electionTimeOutIntervalMillis = electionTimeOutIntervalMillis;
2211 this.snapshotChunkSize = snapshotChunkSize;
2215 public FiniteDuration getElectionTimeOutInterval() {
2216 return new FiniteDuration(electionTimeOutIntervalMillis, TimeUnit.MILLISECONDS);
2220 public int getSnapshotChunkSize() {
2221 return snapshotChunkSize;