2 * Copyright (c) 2015 Brocade Communications 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
8 package org.opendaylight.controller.cluster.raft;
10 import static org.junit.Assert.assertEquals;
12 import akka.persistence.SaveSnapshotSuccess;
13 import com.google.common.collect.ImmutableMap;
14 import java.util.List;
15 import org.junit.Test;
16 import org.opendaylight.controller.cluster.raft.MockRaftActorContext.MockPayload;
17 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
18 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
19 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
20 import org.opendaylight.controller.cluster.raft.messages.AppendEntriesReply;
21 import org.opendaylight.controller.cluster.raft.persisted.ApplyJournalEntries;
22 import org.opendaylight.controller.cluster.raft.persisted.SimpleReplicatedLogEntry;
23 import org.opendaylight.controller.cluster.raft.persisted.UpdateElectionTerm;
24 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
25 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
26 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
29 * Tests replication and snapshots end-to-end using real RaftActors and behavior communication.
31 * @author Thomas Pantelis
33 public class ReplicationAndSnapshotsIntegrationTest extends AbstractRaftActorIntegrationTest {
35 private List<SimpleReplicatedLogEntry> origLeaderJournal;
37 private MockPayload recoveredPayload0;
38 private MockPayload recoveredPayload1;
39 private MockPayload recoveredPayload2;
40 private MockPayload payload3;
41 private MockPayload payload4;
42 private MockPayload payload5;
43 private MockPayload payload6;
44 private MockPayload payload7;
47 public void runTest() throws Exception {
48 testLog.info("testReplicationAndSnapshots starting");
50 // Setup the persistent journal for the leader. We'll start up with 3 journal log entries (one less
51 // than the snapshotBatchCount).
53 InMemoryJournal.addEntry(leaderId, seqId++, new UpdateElectionTerm(initialTerm, leaderId));
54 recoveredPayload0 = new MockPayload("zero");
55 InMemoryJournal.addEntry(leaderId, seqId++, new SimpleReplicatedLogEntry(0, initialTerm, recoveredPayload0));
56 recoveredPayload1 = new MockPayload("one");
57 InMemoryJournal.addEntry(leaderId, seqId++, new SimpleReplicatedLogEntry(1, initialTerm, recoveredPayload1));
58 recoveredPayload2 = new MockPayload("two");
59 InMemoryJournal.addEntry(leaderId, seqId++, new SimpleReplicatedLogEntry(2, initialTerm, recoveredPayload2));
60 InMemoryJournal.addEntry(leaderId, seqId++, new ApplyJournalEntries(2));
62 origLeaderJournal = InMemoryJournal.get(leaderId, SimpleReplicatedLogEntry.class);
64 // Create the leader and 2 follower actors and verify initial syncing of the followers after leader
65 // persistence recovery.
67 DefaultConfigParamsImpl followerConfigParams = newFollowerConfigParams();
68 followerConfigParams.setSnapshotBatchCount(snapshotBatchCount);
69 follower1Actor = newTestRaftActor(follower1Id, ImmutableMap.of(leaderId, testActorPath(leaderId),
70 follower2Id, testActorPath(follower2Id)), followerConfigParams);
72 follower2Actor = newTestRaftActor(follower2Id, ImmutableMap.of(leaderId, testActorPath(leaderId),
73 follower1Id, testActorPath(follower1Id)), followerConfigParams);
75 peerAddresses = ImmutableMap.<String, String>builder()
76 .put(follower1Id, follower1Actor.path().toString())
77 .put(follower2Id, follower2Actor.path().toString()).build();
79 leaderConfigParams = newLeaderConfigParams();
80 leaderActor = newTestRaftActor(leaderId, peerAddresses, leaderConfigParams);
82 follower1CollectorActor = follower1Actor.underlyingActor().collectorActor();
83 follower2CollectorActor = follower2Actor.underlyingActor().collectorActor();
84 leaderCollectorActor = leaderActor.underlyingActor().collectorActor();
86 leaderContext = leaderActor.underlyingActor().getRaftActorContext();
88 verifyLeaderRecoveryAndInitialization();
92 testSubsequentReplications();
96 testLeaderReinstatement();
98 testLog.info("testReplicationAndSnapshots ending");
102 * Verify the expected leader is elected as the leader and verify initial syncing of the followers
103 * from the leader's persistence recovery.
105 void verifyLeaderRecoveryAndInitialization() {
106 testLog.info("verifyLeaderRecoveryAndInitialization starting");
108 waitUntilLeader(leaderActor);
110 currentTerm = leaderContext.getTermInformation().getCurrentTerm();
111 assertEquals("Current term > " + initialTerm, true, currentTerm > initialTerm);
113 leader = leaderActor.underlyingActor().getCurrentBehavior();
115 // The followers should receive AppendEntries for each leader log entry that was recovered from
116 // persistence and apply each one.
117 List<ApplyState> applyStates = MessageCollectorActor.expectMatching(
118 follower1CollectorActor, ApplyState.class, 3);
119 verifyApplyState(applyStates.get(0), null, null, initialTerm, 0, recoveredPayload0);
120 verifyApplyState(applyStates.get(1), null, null, initialTerm, 1, recoveredPayload1);
121 verifyApplyState(applyStates.get(2), null, null, initialTerm, 2, recoveredPayload2);
123 // Verify follower 1 applies a log entry for at least the last entry index.
124 verifyApplyJournalEntries(follower1CollectorActor, 2);
126 applyStates = MessageCollectorActor.expectMatching(follower2CollectorActor, ApplyState.class, 3);
127 verifyApplyState(applyStates.get(0), null, null, initialTerm, 0, recoveredPayload0);
128 verifyApplyState(applyStates.get(1), null, null, initialTerm, 1, recoveredPayload1);
129 verifyApplyState(applyStates.get(2), null, null, initialTerm, 2, recoveredPayload2);
131 // Verify follower 1]2 applies a log entry for at least the last entry index.
132 verifyApplyJournalEntries(follower2CollectorActor, 2);
134 MessageCollectorActor.clearMessages(leaderCollectorActor);
135 MessageCollectorActor.clearMessages(follower1CollectorActor);
136 MessageCollectorActor.clearMessages(follower2CollectorActor);
138 // The leader should have performed fake snapshots due to the follower's AppendEntriesReplies and
139 // trimmed the in-memory log so that only the last entry remains.
140 assertEquals("Leader snapshot term", initialTerm, leaderContext.getReplicatedLog().getSnapshotTerm());
141 assertEquals("Leader snapshot index", 1, leaderContext.getReplicatedLog().getSnapshotIndex());
142 assertEquals("Leader journal log size", 1, leaderContext.getReplicatedLog().size());
143 assertEquals("Leader journal last index", 2, leaderContext.getReplicatedLog().lastIndex());
144 assertEquals("Leader commit index", 2, leaderContext.getCommitIndex());
145 assertEquals("Leader last applied", 2, leaderContext.getLastApplied());
146 assertEquals("Leader replicatedToAllIndex", 1, leader.getReplicatedToAllIndex());
148 // Verify the follower's persisted journal log.
149 verifyPersistedJournal(follower1Id, origLeaderJournal);
150 verifyPersistedJournal(follower2Id, origLeaderJournal);
152 MessageCollectorActor.clearMessages(leaderCollectorActor);
153 MessageCollectorActor.clearMessages(follower1CollectorActor);
154 MessageCollectorActor.clearMessages(follower2CollectorActor);
156 testLog.info("verifyLeaderRecoveryAndInitialization ending");
160 * Send a payload to the TestRaftActor to persist and replicate. Since snapshotBatchCount is set to
161 * 4 and we already have 3 entries in the journal log, this should initiate a snapshot. In this
162 * scenario, the follower consensus and application of state is delayed until after the snapshot
165 private void testFirstSnapshot() throws Exception {
166 testLog.info("testFirstSnapshot starting");
168 expSnapshotState.add(recoveredPayload0);
169 expSnapshotState.add(recoveredPayload1);
170 expSnapshotState.add(recoveredPayload2);
172 // Delay the consensus by temporarily dropping the AppendEntries to both followers.
173 follower1Actor.underlyingActor().startDropMessages(AppendEntries.class);
174 follower2Actor.underlyingActor().startDropMessages(AppendEntries.class);
177 payload3 = sendPayloadData(leaderActor, "three");
179 // Wait for snapshot complete.
180 MessageCollectorActor.expectFirstMatching(leaderCollectorActor, SaveSnapshotSuccess.class);
182 // The snapshot index should not be advanced nor the log trimmed because replicatedToAllIndex
183 // is behind due the followers not being replicated yet via AppendEntries.
184 assertEquals("Leader snapshot term", initialTerm, leaderContext.getReplicatedLog().getSnapshotTerm());
185 assertEquals("Leader snapshot index", 1, leaderContext.getReplicatedLog().getSnapshotIndex());
186 assertEquals("Leader journal log size", 2, leaderContext.getReplicatedLog().size());
187 assertEquals("Leader journal last index", 3, leaderContext.getReplicatedLog().lastIndex());
189 // Verify the persisted snapshot in the leader. This should reflect the advanced snapshot index as
190 // the last applied log entry (2) even though the leader hasn't yet advanced its cached snapshot index.
191 List<Snapshot> persistedSnapshots = InMemorySnapshotStore.getSnapshots(leaderId, Snapshot.class);
192 assertEquals("Persisted snapshots size", 1, persistedSnapshots.size());
193 verifySnapshot("Persisted", persistedSnapshots.get(0), initialTerm, 2, currentTerm, 3);
194 List<ReplicatedLogEntry> unAppliedEntry = persistedSnapshots.get(0).getUnAppliedEntries();
195 assertEquals("Persisted Snapshot getUnAppliedEntries size", 1, unAppliedEntry.size());
196 verifyReplicatedLogEntry(unAppliedEntry.get(0), currentTerm, 3, payload3);
198 // The leader's persisted journal log should be cleared since we snapshotted.
199 List<SimpleReplicatedLogEntry> persistedLeaderJournal =
200 InMemoryJournal.get(leaderId, SimpleReplicatedLogEntry.class);
201 assertEquals("Persisted journal log size", 0, persistedLeaderJournal.size());
203 // Allow AppendEntries to both followers to proceed. This should catch up the followers and cause a
204 // "fake" snapshot in the leader to advance the snapshot index to 2. Also the state should be applied
205 // in all members (via ApplyState).
206 follower1Actor.underlyingActor().stopDropMessages(AppendEntries.class);
207 follower2Actor.underlyingActor().stopDropMessages(AppendEntries.class);
209 ApplyState applyState = MessageCollectorActor.expectFirstMatching(leaderCollectorActor, ApplyState.class);
210 verifyApplyState(applyState, leaderCollectorActor, payload3.toString(), currentTerm, 3, payload3);
212 verifyApplyJournalEntries(leaderCollectorActor, 3);
214 assertEquals("Leader commit index", 3, leaderContext.getCommitIndex());
216 applyState = MessageCollectorActor.expectFirstMatching(follower1CollectorActor, ApplyState.class);
217 verifyApplyState(applyState, null, null, currentTerm, 3, payload3);
219 verifyApplyJournalEntries(follower1CollectorActor, 3);
221 applyState = MessageCollectorActor.expectFirstMatching(follower2CollectorActor, ApplyState.class);
222 verifyApplyState(applyState, null, null, currentTerm, 3, payload3);
224 verifyApplyJournalEntries(follower2CollectorActor, 3);
226 assertEquals("Leader snapshot term", initialTerm, leaderContext.getReplicatedLog().getSnapshotTerm());
227 assertEquals("Leader snapshot index", 2, leaderContext.getReplicatedLog().getSnapshotIndex());
228 assertEquals("Leader journal log size", 1, leaderContext.getReplicatedLog().size());
229 assertEquals("Leader commit index", 3, leaderContext.getCommitIndex());
230 assertEquals("Leader last applied", 3, leaderContext.getLastApplied());
231 assertEquals("Leader replicatedToAllIndex", 2, leader.getReplicatedToAllIndex());
233 // The followers should also snapshot so verify.
235 MessageCollectorActor.expectFirstMatching(follower1CollectorActor, SaveSnapshotSuccess.class);
236 persistedSnapshots = InMemorySnapshotStore.getSnapshots(follower1Id, Snapshot.class);
237 assertEquals("Persisted snapshots size", 1, persistedSnapshots.size());
238 // The last applied index in the snapshot may or may not be the last log entry depending on
239 // timing so to avoid intermittent test failures, we'll just verify the snapshot's last term/index.
240 assertEquals("Follower1 Snapshot getLastTerm", currentTerm, persistedSnapshots.get(0).getLastTerm());
241 assertEquals("Follower1 Snapshot getLastIndex", 3, persistedSnapshots.get(0).getLastIndex());
243 MessageCollectorActor.expectFirstMatching(follower2CollectorActor, SaveSnapshotSuccess.class);
245 MessageCollectorActor.clearMessages(leaderCollectorActor);
246 MessageCollectorActor.clearMessages(follower1CollectorActor);
247 MessageCollectorActor.clearMessages(follower2CollectorActor);
249 testLog.info("testFirstSnapshot ending");
253 * Send 3 more payload instances and verify they get applied by all members.
255 private void testSubsequentReplications() {
256 testLog.info("testSubsequentReplications starting");
258 payload4 = sendPayloadData(leaderActor, "four");
259 payload5 = sendPayloadData(leaderActor, "five");
260 payload6 = sendPayloadData(leaderActor, "six");
262 // Verify the leader applies the states.
263 List<ApplyState> applyStates = MessageCollectorActor.expectMatching(leaderCollectorActor, ApplyState.class, 3);
264 verifyApplyState(applyStates.get(0), leaderCollectorActor, payload4.toString(), currentTerm, 4, payload4);
265 verifyApplyState(applyStates.get(1), leaderCollectorActor, payload5.toString(), currentTerm, 5, payload5);
266 verifyApplyState(applyStates.get(2), leaderCollectorActor, payload6.toString(), currentTerm, 6, payload6);
268 // Verify the leader applies a log entry for at least the last entry index.
269 verifyApplyJournalEntries(leaderCollectorActor, 6);
271 // The leader should have performed fake snapshots due to the follower's AppendEntriesReplies and
272 // trimmed the in-memory log so that only the last entry remains.
273 assertEquals("Leader snapshot term", currentTerm, leaderContext.getReplicatedLog().getSnapshotTerm());
274 assertEquals("Leader snapshot index", 5, leaderContext.getReplicatedLog().getSnapshotIndex());
275 assertEquals("Leader journal log size", 1, leaderContext.getReplicatedLog().size());
276 assertEquals("Leader journal last index", 6, leaderContext.getReplicatedLog().lastIndex());
277 assertEquals("Leader commit index", 6, leaderContext.getCommitIndex());
278 assertEquals("Leader last applied", 6, leaderContext.getLastApplied());
279 assertEquals("Leader replicatedToAllIndex", 5, leader.getReplicatedToAllIndex());
281 // Verify follower 1 applies the states.
282 applyStates = MessageCollectorActor.expectMatching(follower1CollectorActor, ApplyState.class, 3);
283 verifyApplyState(applyStates.get(0), null, null, currentTerm, 4, payload4);
284 verifyApplyState(applyStates.get(1), null, null, currentTerm, 5, payload5);
285 verifyApplyState(applyStates.get(2), null, null, currentTerm, 6, payload6);
287 // Verify follower 1 applies a log entry for at least the last entry index.
288 verifyApplyJournalEntries(follower1CollectorActor, 6);
290 // Verify follower 2 applies the states.
291 applyStates = MessageCollectorActor.expectMatching(follower2CollectorActor, ApplyState.class, 3);
292 verifyApplyState(applyStates.get(0), null, null, currentTerm, 4, payload4);
293 verifyApplyState(applyStates.get(1), null, null, currentTerm, 5, payload5);
294 verifyApplyState(applyStates.get(2), null, null, currentTerm, 6, payload6);
296 // Verify follower 2 applies a log entry for at least the last entry index.
297 verifyApplyJournalEntries(follower2CollectorActor, 6);
299 MessageCollectorActor.clearMessages(leaderCollectorActor);
301 testLog.info("testSubsequentReplications ending");
305 * Send one more payload to trigger another snapshot. In this scenario, we delay the snapshot until
306 * consensus occurs and the leader applies the state.
308 private void testSecondSnapshot() throws Exception {
309 testLog.info("testSecondSnapshot starting");
311 expSnapshotState.add(payload3);
312 expSnapshotState.add(payload4);
313 expSnapshotState.add(payload5);
314 expSnapshotState.add(payload6);
316 // Delay the CaptureSnapshot message to the leader actor.
317 leaderActor.underlyingActor().startDropMessages(CaptureSnapshotReply.class);
320 payload7 = sendPayloadData(leaderActor, "seven");
322 // Capture the CaptureSnapshotReply message so we can send it later.
323 final CaptureSnapshotReply captureSnapshotReply = MessageCollectorActor.expectFirstMatching(
324 leaderCollectorActor, CaptureSnapshotReply.class);
326 // Wait for the state to be applied in the leader.
327 ApplyState applyState = MessageCollectorActor.expectFirstMatching(leaderCollectorActor, ApplyState.class);
328 verifyApplyState(applyState, leaderCollectorActor, payload7.toString(), currentTerm, 7, payload7);
330 // At this point the leader has applied the new state but the cached snapshot index should not be
331 // advanced by a "fake" snapshot because we're in the middle of a snapshot. We'll wait for at least
332 // one more heartbeat AppendEntriesReply to ensure this does not occur.
333 MessageCollectorActor.clearMessages(leaderCollectorActor);
334 MessageCollectorActor.expectFirstMatching(leaderCollectorActor, AppendEntriesReply.class);
336 assertEquals("Leader snapshot term", currentTerm, leaderContext.getReplicatedLog().getSnapshotTerm());
337 assertEquals("Leader snapshot index", 5, leaderContext.getReplicatedLog().getSnapshotIndex());
338 assertEquals("Leader journal log size", 2, leaderContext.getReplicatedLog().size());
339 assertEquals("Leader journal last index", 7, leaderContext.getReplicatedLog().lastIndex());
340 assertEquals("Leader commit index", 7, leaderContext.getCommitIndex());
341 assertEquals("Leader last applied", 7, leaderContext.getLastApplied());
342 assertEquals("Leader replicatedToAllIndex", 5, leader.getReplicatedToAllIndex());
344 // Now deliver the CaptureSnapshotReply.
345 leaderActor.underlyingActor().stopDropMessages(CaptureSnapshotReply.class);
346 leaderActor.tell(captureSnapshotReply, leaderActor);
348 // Wait for snapshot complete.
349 MessageCollectorActor.expectFirstMatching(leaderCollectorActor, SaveSnapshotSuccess.class);
351 // Wait for another heartbeat AppendEntriesReply. This should cause a "fake" snapshot to advance the
352 // snapshot index and trimmed the log since we're no longer in a snapshot.
353 MessageCollectorActor.clearMessages(leaderCollectorActor);
354 MessageCollectorActor.expectFirstMatching(leaderCollectorActor, AppendEntriesReply.class);
355 assertEquals("Leader snapshot term", currentTerm, leaderContext.getReplicatedLog().getSnapshotTerm());
356 assertEquals("Leader snapshot index", 6, leaderContext.getReplicatedLog().getSnapshotIndex());
357 assertEquals("Leader journal log size", 1, leaderContext.getReplicatedLog().size());
358 assertEquals("Leader journal last index", 7, leaderContext.getReplicatedLog().lastIndex());
359 assertEquals("Leader commit index", 7, leaderContext.getCommitIndex());
361 // Verify the persisted snapshot. This should reflect the snapshot index as the last applied
362 // log entry (7) and shouldn't contain any unapplied entries as we capture persisted the snapshot data
363 // when the snapshot is created (ie when the CaptureSnapshot is processed).
364 List<Snapshot> persistedSnapshots = InMemorySnapshotStore.getSnapshots(leaderId, Snapshot.class);
365 assertEquals("Persisted snapshots size", 1, persistedSnapshots.size());
366 verifySnapshot("Persisted", persistedSnapshots.get(0), currentTerm, 6, currentTerm, 7);
367 List<ReplicatedLogEntry> unAppliedEntry = persistedSnapshots.get(0).getUnAppliedEntries();
368 assertEquals("Persisted Snapshot getUnAppliedEntries size", 1, unAppliedEntry.size());
369 verifyReplicatedLogEntry(unAppliedEntry.get(0), currentTerm, 7, payload7);
371 // The leader's persisted journal log should be cleared since we did a snapshot.
372 List<SimpleReplicatedLogEntry> persistedLeaderJournal = InMemoryJournal.get(
373 leaderId, SimpleReplicatedLogEntry.class);
374 assertEquals("Persisted journal log size", 0, persistedLeaderJournal.size());
376 // Verify the followers apply all 4 new log entries.
377 List<ApplyState> applyStates = MessageCollectorActor.expectMatching(follower1CollectorActor,
378 ApplyState.class, 4);
379 verifyApplyState(applyStates.get(0), null, null, currentTerm, 4, payload4);
380 verifyApplyState(applyStates.get(1), null, null, currentTerm, 5, payload5);
381 verifyApplyState(applyStates.get(2), null, null, currentTerm, 6, payload6);
382 verifyApplyState(applyStates.get(3), null, null, currentTerm, 7, payload7);
384 applyStates = MessageCollectorActor.expectMatching(follower2CollectorActor, ApplyState.class, 4);
385 verifyApplyState(applyStates.get(0), null, null, currentTerm, 4, payload4);
386 verifyApplyState(applyStates.get(1), null, null, currentTerm, 5, payload5);
387 verifyApplyState(applyStates.get(2), null, null, currentTerm, 6, payload6);
388 verifyApplyState(applyStates.get(3), null, null, currentTerm, 7, payload7);
390 // Verify the follower's snapshot index has also advanced. (after another AppendEntries heartbeat
393 MessageCollectorActor.clearMessages(follower1CollectorActor);
394 MessageCollectorActor.expectFirstMatching(follower1CollectorActor, AppendEntries.class);
395 follower1Context = follower1Actor.underlyingActor().getRaftActorContext();
396 assertEquals("Follower 1 snapshot term", currentTerm, follower1Context.getReplicatedLog().getSnapshotTerm());
397 assertEquals("Follower 1 snapshot index", 6, follower1Context.getReplicatedLog().getSnapshotIndex());
398 assertEquals("Follower 1 journal log size", 1, follower1Context.getReplicatedLog().size());
399 assertEquals("Follower 1 journal last index", 7, follower1Context.getReplicatedLog().lastIndex());
400 assertEquals("Follower 1 commit index", 7, follower1Context.getCommitIndex());
402 MessageCollectorActor.clearMessages(follower2CollectorActor);
403 MessageCollectorActor.expectFirstMatching(follower2CollectorActor, AppendEntries.class);
404 follower2Context = follower2Actor.underlyingActor().getRaftActorContext();
405 assertEquals("Follower 2 snapshot term", currentTerm, follower2Context.getReplicatedLog().getSnapshotTerm());
406 assertEquals("Follower 2 snapshot index", 6, follower2Context.getReplicatedLog().getSnapshotIndex());
407 assertEquals("Follower 2 journal log size", 1, follower2Context.getReplicatedLog().size());
408 assertEquals("Follower 2 journal last index", 7, follower2Context.getReplicatedLog().lastIndex());
409 assertEquals("Follower 2 commit index", 7, follower2Context.getCommitIndex());
411 expSnapshotState.add(payload7);
413 testLog.info("testSecondSnapshot ending");
417 * Kill the leader actor, reinstate it and verify the recovered journal.
419 private void testLeaderReinstatement() {
420 testLog.info("testLeaderReinstatement starting");
422 killActor(leaderActor);
424 leaderActor = newTestRaftActor(leaderId, peerAddresses, leaderConfigParams);
426 leaderActor.underlyingActor().waitForRecoveryComplete();
428 leaderContext = leaderActor.underlyingActor().getRaftActorContext();
430 assertEquals("Leader snapshot term", currentTerm, leaderContext.getReplicatedLog().getSnapshotTerm());
431 assertEquals("Leader snapshot index", 6, leaderContext.getReplicatedLog().getSnapshotIndex());
432 assertEquals("Leader journal log size", 1, leaderContext.getReplicatedLog().size());
433 assertEquals("Leader journal last index", 7, leaderContext.getReplicatedLog().lastIndex());
434 assertEquals("Leader commit index", 7, leaderContext.getCommitIndex());
435 assertEquals("Leader last applied", 7, leaderContext.getLastApplied());
436 verifyReplicatedLogEntry(leaderContext.getReplicatedLog().last(), currentTerm, 7, payload7);
438 testLog.info("testLeaderReinstatement ending");