/* * Copyright (c) 2015 Brocade Communications Systems, Inc. and others. All rights reserved. * * This program and the accompanying materials are made available under the * terms of the Eclipse Public License v1.0 which accompanies this distribution, * and is available at http://www.eclipse.org/legal/epl-v10.html */ package org.opendaylight.controller.cluster.raft; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertTrue; import static org.junit.Assert.fail; import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.assertNoneMatching; import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.clearMessages; import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.expectFirstMatching; import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.expectMatching; import akka.actor.ActorRef; import akka.actor.Props; import akka.actor.UntypedActor; import akka.dispatch.Dispatchers; import akka.testkit.JavaTestKit; import akka.testkit.TestActorRef; import com.google.common.base.Optional; import com.google.common.base.Stopwatch; import com.google.common.collect.ImmutableMap; import com.google.common.collect.Maps; import com.google.common.collect.Sets; import java.util.Arrays; import java.util.Collections; import java.util.List; import java.util.Map; import java.util.concurrent.TimeUnit; import org.junit.After; import org.junit.Before; import org.junit.Test; import org.opendaylight.controller.cluster.NonPersistentDataProvider; import org.opendaylight.controller.cluster.raft.ServerConfigurationPayload.ServerInfo; import org.opendaylight.controller.cluster.raft.base.messages.ApplyJournalEntries; import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot; import org.opendaylight.controller.cluster.raft.base.messages.ApplyState; import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply; import org.opendaylight.controller.cluster.raft.base.messages.ElectionTimeout; import org.opendaylight.controller.cluster.raft.base.messages.InitiateCaptureSnapshot; import org.opendaylight.controller.cluster.raft.base.messages.TimeoutNow; import org.opendaylight.controller.cluster.raft.base.messages.UpdateElectionTerm; import org.opendaylight.controller.cluster.raft.behaviors.AbstractLeader; import org.opendaylight.controller.cluster.raft.behaviors.Follower; import org.opendaylight.controller.cluster.raft.behaviors.Leader; import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior; import org.opendaylight.controller.cluster.raft.messages.AddServer; import org.opendaylight.controller.cluster.raft.messages.AddServerReply; import org.opendaylight.controller.cluster.raft.messages.AppendEntries; import org.opendaylight.controller.cluster.raft.messages.ChangeServersVotingStatus; import org.opendaylight.controller.cluster.raft.messages.InstallSnapshot; import org.opendaylight.controller.cluster.raft.messages.RemoveServer; import org.opendaylight.controller.cluster.raft.messages.RemoveServerReply; import org.opendaylight.controller.cluster.raft.messages.RequestVote; import org.opendaylight.controller.cluster.raft.messages.ServerChangeReply; import org.opendaylight.controller.cluster.raft.messages.ServerChangeStatus; import org.opendaylight.controller.cluster.raft.messages.ServerRemoved; import org.opendaylight.controller.cluster.raft.messages.UnInitializedFollowerSnapshotReply; import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy; import org.opendaylight.controller.cluster.raft.utils.ForwardMessageToBehaviorActor; import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal; import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore; import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import scala.concurrent.duration.FiniteDuration; /** * Unit tests for RaftActorServerConfigurationSupport. * * @author Thomas Pantelis */ public class RaftActorServerConfigurationSupportTest extends AbstractActorTest { static final String LEADER_ID = "leader"; static final String FOLLOWER_ID = "follower"; static final String FOLLOWER_ID2 = "follower2"; static final String NEW_SERVER_ID = "new-server"; static final String NEW_SERVER_ID2 = "new-server2"; private static final Logger LOG = LoggerFactory.getLogger(RaftActorServerConfigurationSupportTest.class); private static final Class COMMIT_MESSAGE_CLASS = RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT.getClass(); private static final boolean NO_PERSISTENCE = false; private static final boolean PERSISTENT = true; private final TestActorFactory actorFactory = new TestActorFactory(getSystem()); private final TestActorRef followerActor = actorFactory.createTestActor( Props.create(ForwardMessageToBehaviorActor.class).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(FOLLOWER_ID)); private TestActorRef newFollowerRaftActor; private TestActorRef newFollowerCollectorActor; private RaftActorContext newFollowerActorContext; private final JavaTestKit testKit = new JavaTestKit(getSystem()); @Before public void setup() { InMemoryJournal.clear(); InMemorySnapshotStore.clear(); } private void setupNewFollower() { DefaultConfigParamsImpl configParams = newFollowerConfigParams(); newFollowerCollectorActor = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(NEW_SERVER_ID + "Collector")); newFollowerRaftActor = actorFactory.createTestActor(MockNewFollowerRaftActor.props( configParams, newFollowerCollectorActor).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(NEW_SERVER_ID)); try { newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext(); } catch (Exception e) { newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext(); } } private static DefaultConfigParamsImpl newFollowerConfigParams() { DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS)); configParams.setElectionTimeoutFactor(100000); configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName()); return configParams; } @After public void tearDown() throws Exception { actorFactory.close(); } @Test public void testAddServerWithExistingFollower() throws Exception { LOG.info("testAddServerWithExistingFollower starting"); setupNewFollower(); RaftActorContextImpl followerActorContext = newFollowerContext(FOLLOWER_ID, followerActor); followerActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries( 0, 3, 1).build()); followerActorContext.setCommitIndex(2); followerActorContext.setLastApplied(2); Follower follower = new Follower(followerActorContext); followerActor.underlyingActor().setBehavior(follower); followerActorContext.setCurrentBehavior(follower); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()), followerActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); // Expect initial heartbeat from the leader. expectFirstMatching(followerActor, AppendEntries.class); clearMessages(followerActor); MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor(); TestActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor); leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef()); // Leader should install snapshot - capture and verify ApplySnapshot contents ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class); @SuppressWarnings("unchecked") List snapshotState = (List) MockRaftActor.toObject(applySnapshot.getSnapshot().getState()); assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState()); AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus()); assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get()); // Verify ServerConfigurationPayload entry in leader's log expectFirstMatching(leaderCollectorActor, ApplyState.class); RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext(); assertEquals("Leader journal last index", 3, leaderActorContext.getReplicatedLog().lastIndex()); assertEquals("Leader commit index", 3, leaderActorContext.getCommitIndex()); assertEquals("Leader last applied index", 3, leaderActorContext.getLastApplied()); verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID)); // Verify ServerConfigurationPayload entry in both followers expectFirstMatching(followerActor, ApplyState.class); assertEquals("Follower journal last index", 3, followerActorContext.getReplicatedLog().lastIndex()); verifyServerConfigurationPayloadEntry(followerActorContext.getReplicatedLog(), votingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID)); expectFirstMatching(newFollowerCollectorActor, ApplyState.class); assertEquals("New follower journal last index", 3, newFollowerActorContext.getReplicatedLog().lastIndex()); verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID)); // Verify new server config was applied in both followers assertEquals("Follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID), followerActorContext.getPeerIds()); assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, FOLLOWER_ID), newFollowerActorContext.getPeerIds()); expectFirstMatching(newFollowerCollectorActor, ApplyState.class); expectFirstMatching(followerActor, ApplyState.class); assertEquals("Follower commit index", 3, followerActorContext.getCommitIndex()); assertEquals("Follower last applied index", 3, followerActorContext.getLastApplied()); assertEquals("New follower commit index", 3, newFollowerActorContext.getCommitIndex()); assertEquals("New follower last applied index", 3, newFollowerActorContext.getLastApplied()); List persistedLogEntries = InMemoryJournal.get(LEADER_ID, ReplicatedLogImplEntry.class); assertEquals("Leader ReplicatedLogImplEntry entries", 1, persistedLogEntries.size()); ReplicatedLogImplEntry logEntry = persistedLogEntries.get(0); assertEquals("Leader ReplicatedLogImplEntry getTerm", 1, logEntry.getTerm()); assertEquals("Leader ReplicatedLogImplEntry getIndex", 3, logEntry.getIndex()); assertEquals("Leader ReplicatedLogImplEntry getData", ServerConfigurationPayload.class, logEntry.getData().getClass()); persistedLogEntries = InMemoryJournal.get(NEW_SERVER_ID, ReplicatedLogImplEntry.class); assertEquals("New follower ReplicatedLogImplEntry entries", 1, persistedLogEntries.size()); logEntry = persistedLogEntries.get(0); assertEquals("New follower ReplicatedLogImplEntry getTerm", 1, logEntry.getTerm()); assertEquals("New follower ReplicatedLogImplEntry getIndex", 3, logEntry.getIndex()); assertEquals("New follower ReplicatedLogImplEntry getData", ServerConfigurationPayload.class, logEntry.getData().getClass()); LOG.info("testAddServerWithExistingFollower ending"); } @Test public void testAddServerWithNoExistingFollower() throws Exception { LOG.info("testAddServerWithNoExistingFollower starting"); setupNewFollower(); RaftActorContext initialActorContext = new MockRaftActorContext(); initialActorContext.setCommitIndex(1); initialActorContext.setLastApplied(1); initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries( 0, 2, 1).build()); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(), initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor(); RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext(); TestActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor); leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef()); // Leader should install snapshot - capture and verify ApplySnapshot contents ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class); @SuppressWarnings("unchecked") List snapshotState = (List) MockRaftActor.toObject(applySnapshot.getSnapshot().getState()); assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState()); AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus()); assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get()); // Verify ServerConfigurationPayload entry in leader's log expectFirstMatching(leaderCollectorActor, ApplyState.class); assertEquals("Leader journal last index", 2, leaderActorContext.getReplicatedLog().lastIndex()); assertEquals("Leader commit index", 2, leaderActorContext.getCommitIndex()); assertEquals("Leader last applied index", 2, leaderActorContext.getLastApplied()); verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID), votingServer(NEW_SERVER_ID)); // Verify ServerConfigurationPayload entry in the new follower expectFirstMatching(newFollowerCollectorActor, ApplyState.class); assertEquals("New follower journal last index", 2, newFollowerActorContext.getReplicatedLog().lastIndex()); verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID), votingServer(NEW_SERVER_ID)); // Verify new server config was applied in the new follower assertEquals("New follower peers", Sets.newHashSet(LEADER_ID), newFollowerActorContext.getPeerIds()); LOG.info("testAddServerWithNoExistingFollower ending"); } @Test public void testAddServersAsNonVoting() throws Exception { LOG.info("testAddServersAsNonVoting starting"); setupNewFollower(); RaftActorContext initialActorContext = new MockRaftActorContext(); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(), initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor(); RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext(); TestActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor); leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), false), testKit.getRef()); AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus()); assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get()); // Verify ServerConfigurationPayload entry in leader's log expectFirstMatching(leaderCollectorActor, ApplyState.class); assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex()); assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex()); assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied()); verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID), nonVotingServer(NEW_SERVER_ID)); // Verify ServerConfigurationPayload entry in the new follower expectFirstMatching(newFollowerCollectorActor, ApplyState.class); assertEquals("New follower journal last index", 0, newFollowerActorContext.getReplicatedLog().lastIndex()); verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID), nonVotingServer(NEW_SERVER_ID)); // Verify new server config was applied in the new follower assertEquals("New follower peers", Sets.newHashSet(LEADER_ID), newFollowerActorContext.getPeerIds()); assertNoneMatching(newFollowerCollectorActor, InstallSnapshot.class, 500); // Add another non-voting server. clearMessages(leaderCollectorActor); RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor); Follower newFollower2 = new Follower(follower2ActorContext); followerActor.underlyingActor().setBehavior(newFollower2); leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit.getRef()); addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus()); assertEquals("getLeaderHint", java.util.Optional.of(LEADER_ID), addServerReply.getLeaderHint()); expectFirstMatching(leaderCollectorActor, ApplyState.class); assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex()); assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex()); assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied()); verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID), nonVotingServer(NEW_SERVER_ID), nonVotingServer(NEW_SERVER_ID2)); LOG.info("testAddServersAsNonVoting ending"); } @Test public void testAddServerWithOperationInProgress() throws Exception { LOG.info("testAddServerWithOperationInProgress starting"); setupNewFollower(); RaftActorContext initialActorContext = new MockRaftActorContext(); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(), initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor(); RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext(); TestActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor); RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor); Follower newFollower2 = new Follower(follower2ActorContext); followerActor.underlyingActor().setBehavior(newFollower2); MockNewFollowerRaftActor newFollowerRaftActorInstance = newFollowerRaftActor.underlyingActor(); newFollowerRaftActorInstance.setDropMessageOfType(InstallSnapshot.SERIALIZABLE_CLASS); leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef()); // Wait for leader's install snapshot and capture it InstallSnapshot installSnapshot = expectFirstMatching(newFollowerCollectorActor, InstallSnapshot.class); // Send a second AddServer - should get queued JavaTestKit testKit2 = new JavaTestKit(getSystem()); leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit2.getRef()); // Continue the first AddServer newFollowerRaftActorInstance.setDropMessageOfType(null); newFollowerRaftActor.tell(installSnapshot, leaderActor); // Verify both complete successfully AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus()); addServerReply = testKit2.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus()); // Verify ServerConfigurationPayload entries in leader's log expectMatching(leaderCollectorActor, ApplyState.class, 2); assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex()); assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex()); assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied()); verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID), votingServer(NEW_SERVER_ID), nonVotingServer(NEW_SERVER_ID2)); // Verify ServerConfigurationPayload entry in the new follower expectMatching(newFollowerCollectorActor, ApplyState.class, 2); assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID2), newFollowerActorContext.getPeerIds()); LOG.info("testAddServerWithOperationInProgress ending"); } @Test public void testAddServerWithPriorSnapshotInProgress() throws Exception { LOG.info("testAddServerWithPriorSnapshotInProgress starting"); setupNewFollower(); RaftActorContext initialActorContext = new MockRaftActorContext(); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(), initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor(); RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext(); TestActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor); // Drop commit message for now to delay snapshot completion leaderRaftActor.setDropMessageOfType(String.class); leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor); Object commitMsg = expectFirstMatching(leaderCollectorActor, COMMIT_MESSAGE_CLASS); leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef()); leaderRaftActor.setDropMessageOfType(null); leaderActor.tell(commitMsg, leaderActor); AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus()); assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get()); expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class); // Verify ServerConfigurationPayload entry in leader's log expectFirstMatching(leaderCollectorActor, ApplyState.class); assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex()); assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex()); assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied()); verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID), votingServer(NEW_SERVER_ID)); LOG.info("testAddServerWithPriorSnapshotInProgress ending"); } @Test public void testAddServerWithPriorSnapshotCompleteTimeout() throws Exception { LOG.info("testAddServerWithPriorSnapshotCompleteTimeout starting"); setupNewFollower(); RaftActorContext initialActorContext = new MockRaftActorContext(); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(), initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor(); RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext(); ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(1); // Drop commit message so the snapshot doesn't complete. leaderRaftActor.setDropMessageOfType(COMMIT_MESSAGE_CLASS); leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor); leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef()); AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus()); assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size()); LOG.info("testAddServerWithPriorSnapshotCompleteTimeout ending"); } @Test public void testAddServerWithLeaderChangeBeforePriorSnapshotComplete() throws Exception { LOG.info("testAddServerWithLeaderChangeBeforePriorSnapshotComplete starting"); setupNewFollower(); RaftActorContext initialActorContext = new MockRaftActorContext(); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(), initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor(); RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext(); ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(100); TestActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor); // Drop the commit message so the snapshot doesn't complete yet. leaderRaftActor.setDropMessageOfType(COMMIT_MESSAGE_CLASS); leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor); leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef()); Object commitMsg = expectFirstMatching(leaderCollectorActor, COMMIT_MESSAGE_CLASS); // Change the leader behavior to follower leaderActor.tell(new Follower(leaderActorContext), leaderActor); // Drop CaptureSnapshotReply in case install snapshot is incorrectly initiated after the prior // snapshot completes. This will prevent the invalid snapshot from completing and fail the // isCapturing assertion below. leaderRaftActor.setDropMessageOfType(CaptureSnapshotReply.class); // Complete the prior snapshot - this should be a no-op b/c it's no longer the leader leaderActor.tell(commitMsg, leaderActor); leaderActor.tell(new RaftActorServerConfigurationSupport.ServerOperationTimeout(NEW_SERVER_ID), leaderActor); AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus()); assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size()); assertEquals("isCapturing", false, leaderActorContext.getSnapshotManager().isCapturing()); LOG.info("testAddServerWithLeaderChangeBeforePriorSnapshotComplete ending"); } @Test public void testAddServerWithLeaderChangeDuringInstallSnapshot() throws Exception { LOG.info("testAddServerWithLeaderChangeDuringInstallSnapshot starting"); setupNewFollower(); RaftActorContext initialActorContext = new MockRaftActorContext(); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(), initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor(); RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext(); ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(8); TestActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor); // Drop the UnInitializedFollowerSnapshotReply to delay it. leaderRaftActor.setDropMessageOfType(UnInitializedFollowerSnapshotReply.class); leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef()); UnInitializedFollowerSnapshotReply snapshotReply = expectFirstMatching(leaderCollectorActor, UnInitializedFollowerSnapshotReply.class); // Prevent election timeout when the leader switches to follower ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(100); // Change the leader behavior to follower leaderActor.tell(new Follower(leaderActorContext), leaderActor); // Send the captured UnInitializedFollowerSnapshotReply - should be a no-op leaderRaftActor.setDropMessageOfType(null); leaderActor.tell(snapshotReply, leaderActor); AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus()); assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size()); LOG.info("testAddServerWithLeaderChangeDuringInstallSnapshot ending"); } @Test public void testAddServerWithInstallSnapshotTimeout() throws Exception { LOG.info("testAddServerWithInstallSnapshotTimeout starting"); setupNewFollower(); RaftActorContext initialActorContext = new MockRaftActorContext(); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(), initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor(); RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext(); ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(1); // Drop the InstallSnapshot message so it times out newFollowerRaftActor.underlyingActor().setDropMessageOfType(InstallSnapshot.SERIALIZABLE_CLASS); leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef()); leaderActor.tell(new UnInitializedFollowerSnapshotReply("bogus"), leaderActor); AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus()); assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size()); assertEquals("Leader followers size", 0, ((AbstractLeader)leaderRaftActor.getCurrentBehavior()).getFollowerIds().size()); LOG.info("testAddServerWithInstallSnapshotTimeout ending"); } @Test public void testAddServerWithNoLeader() { LOG.info("testAddServerWithNoLeader starting"); setupNewFollower(); DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); TestActorRef noLeaderActor = actorFactory.createTestActor( MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString())).config(configParams).persistent(Optional.of(false)). props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); noLeaderActor.underlyingActor().waitForInitializeBehaviorComplete(); noLeaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef()); AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus()); LOG.info("testAddServerWithNoLeader ending"); } @Test public void testAddServerWithNoConsensusReached() { LOG.info("testAddServerWithNoConsensusReached starting"); setupNewFollower(); RaftActorContext initialActorContext = new MockRaftActorContext(); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(), initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor(); RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext(); TestActorRef leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor); // Drop UnInitializedFollowerSnapshotReply initially leaderRaftActor.setDropMessageOfType(UnInitializedFollowerSnapshotReply.class); MockNewFollowerRaftActor newFollowerRaftActorInstance = newFollowerRaftActor.underlyingActor(); TestActorRef newFollowerCollectorActor = newCollectorActor(newFollowerRaftActorInstance, NEW_SERVER_ID); // Drop AppendEntries to the new follower so consensus isn't reached newFollowerRaftActorInstance.setDropMessageOfType(AppendEntries.class); leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef()); // Capture the UnInitializedFollowerSnapshotReply Object snapshotReply = expectFirstMatching(leaderCollectorActor, UnInitializedFollowerSnapshotReply.class); // Send the UnInitializedFollowerSnapshotReply to resume the first request leaderRaftActor.setDropMessageOfType(null); leaderActor.tell(snapshotReply, leaderActor); expectFirstMatching(newFollowerCollectorActor, AppendEntries.class); // Send a second AddServer leaderActor.tell(new AddServer(NEW_SERVER_ID2, "", false), testKit.getRef()); // The first AddServer should succeed with OK even though consensus wasn't reached AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus()); assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get()); // Verify ServerConfigurationPayload entry in leader's log verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID), votingServer(NEW_SERVER_ID)); // The second AddServer should fail since consensus wasn't reached for the first addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.PRIOR_REQUEST_CONSENSUS_TIMEOUT, addServerReply.getStatus()); // Re-send the second AddServer - should also fail leaderActor.tell(new AddServer(NEW_SERVER_ID2, "", false), testKit.getRef()); addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.PRIOR_REQUEST_CONSENSUS_TIMEOUT, addServerReply.getStatus()); LOG.info("testAddServerWithNoConsensusReached ending"); } @Test public void testAddServerWithExistingServer() { LOG.info("testAddServerWithExistingServer starting"); RaftActorContext initialActorContext = new MockRaftActorContext(); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()), initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); leaderActor.tell(new AddServer(FOLLOWER_ID, followerActor.path().toString(), true), testKit.getRef()); AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class); assertEquals("getStatus", ServerChangeStatus.ALREADY_EXISTS, addServerReply.getStatus()); LOG.info("testAddServerWithExistingServer ending"); } @Test public void testAddServerForwardedToLeader() { LOG.info("testAddServerForwardedToLeader starting"); setupNewFollower(); DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); TestActorRef leaderActor = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); TestActorRef followerRaftActor = actorFactory.createTestActor( MockRaftActor.builder().id(FOLLOWER_ID).peerAddresses(ImmutableMap.of(LEADER_ID, leaderActor.path().toString())).config(configParams).persistent(Optional.of(false)). props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(FOLLOWER_ID)); followerRaftActor.underlyingActor().waitForInitializeBehaviorComplete(); followerRaftActor.tell(new AppendEntries(1, LEADER_ID, 0, 1, Collections.emptyList(), -1, -1, (short)0), leaderActor); followerRaftActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef()); expectFirstMatching(leaderActor, AddServer.class); LOG.info("testAddServerForwardedToLeader ending"); } @Test public void testOnApplyState() { LOG.info("testOnApplyState starting"); DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); TestActorRef noLeaderActor = actorFactory.createTestActor( MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString())).config(configParams).persistent(Optional.of(false)). props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); RaftActorServerConfigurationSupport support = new RaftActorServerConfigurationSupport(noLeaderActor.underlyingActor()); ReplicatedLogEntry serverConfigEntry = new MockRaftActorContext.MockReplicatedLogEntry(1, 1, new ServerConfigurationPayload(Collections.emptyList())); boolean handled = support.handleMessage(new ApplyState(null, null, serverConfigEntry), ActorRef.noSender()); assertEquals("Message handled", true, handled); ReplicatedLogEntry nonServerConfigEntry = new MockRaftActorContext.MockReplicatedLogEntry(1, 1, new MockRaftActorContext.MockPayload("1")); handled = support.handleMessage(new ApplyState(null, null, nonServerConfigEntry), ActorRef.noSender()); assertEquals("Message handled", false, handled); LOG.info("testOnApplyState ending"); } @Test public void testRemoveServerWithNoLeader() { LOG.info("testRemoveServerWithNoLeader starting"); DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); TestActorRef leaderActor = actorFactory.createTestActor( MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString())).config(configParams).persistent(Optional.of(false)). props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); leaderActor.underlyingActor().waitForInitializeBehaviorComplete(); leaderActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef()); RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), RemoveServerReply.class); assertEquals("getStatus", ServerChangeStatus.NO_LEADER, removeServerReply.getStatus()); LOG.info("testRemoveServerWithNoLeader ending"); } @Test public void testRemoveServerNonExistentServer() { LOG.info("testRemoveServerNonExistentServer starting"); RaftActorContext initialActorContext = new MockRaftActorContext(); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()), initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); leaderActor.tell(new RemoveServer(NEW_SERVER_ID), testKit.getRef()); RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), RemoveServerReply.class); assertEquals("getStatus", ServerChangeStatus.DOES_NOT_EXIST, removeServerReply.getStatus()); LOG.info("testRemoveServerNonExistentServer ending"); } @Test public void testRemoveServerForwardToLeader() { LOG.info("testRemoveServerForwardToLeader starting"); DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); TestActorRef leaderActor = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); TestActorRef followerRaftActor = actorFactory.createTestActor( MockRaftActor.builder().id(FOLLOWER_ID).peerAddresses(ImmutableMap.of(LEADER_ID, leaderActor.path().toString())).config(configParams).persistent(Optional.of(false)). props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(FOLLOWER_ID)); followerRaftActor.underlyingActor().waitForInitializeBehaviorComplete(); followerRaftActor.tell(new AppendEntries(1, LEADER_ID, 0, 1, Collections.emptyList(), -1, -1, (short)0), leaderActor); followerRaftActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef()); expectFirstMatching(leaderActor, RemoveServer.class); LOG.info("testRemoveServerForwardToLeader ending"); } @Test public void testRemoveServer() { LOG.info("testRemoveServer starting"); DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName()); final String followerActorId = actorFactory.generateActorId(FOLLOWER_ID); final String followerActorPath = actorFactory.createTestActorPath(followerActorId); RaftActorContext initialActorContext = new MockRaftActorContext(); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActorPath), initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); TestActorRef leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor()); TestActorRef collector = actorFactory.createTestActor(MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector")); TestActorRef followerRaftActor = actorFactory.createTestActor( CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString()), configParams, NO_PERSISTENCE, collector).withDispatcher(Dispatchers.DefaultDispatcherId()), followerActorId); leaderActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef()); RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), RemoveServerReply.class); assertEquals("getStatus", ServerChangeStatus.OK, removeServerReply.getStatus()); final ApplyState applyState = MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class); assertEquals(0L, applyState.getReplicatedLogEntry().getIndex()); verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(), votingServer(LEADER_ID)); RaftActorBehavior currentBehavior = leaderActor.underlyingActor().getCurrentBehavior(); assertTrue("Expected Leader", currentBehavior instanceof Leader); assertEquals("Follower ids size", 0, ((Leader)currentBehavior).getFollowerIds().size()); MessageCollectorActor.expectFirstMatching(collector, ServerRemoved.class); LOG.info("testRemoveServer ending"); } @Test public void testRemoveServerLeader() { LOG.info("testRemoveServerLeader starting"); DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName()); final String followerActorId = actorFactory.generateActorId(FOLLOWER_ID); final String followerActorPath = actorFactory.createTestActorPath(followerActorId); RaftActorContext initialActorContext = new MockRaftActorContext(); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActorPath), initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); TestActorRef leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor()); TestActorRef followerCollector = actorFactory.createTestActor(MessageCollectorActor.props(). withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector")); actorFactory.createTestActor( CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString()), configParams, NO_PERSISTENCE, followerCollector).withDispatcher(Dispatchers.DefaultDispatcherId()), followerActorId); leaderActor.tell(new RemoveServer(LEADER_ID), testKit.getRef()); RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), RemoveServerReply.class); assertEquals("getStatus", ServerChangeStatus.OK, removeServerReply.getStatus()); final ApplyState applyState = MessageCollectorActor.expectFirstMatching(followerCollector, ApplyState.class); assertEquals(0L, applyState.getReplicatedLogEntry().getIndex()); verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(), votingServer(FOLLOWER_ID)); MessageCollectorActor.expectFirstMatching(leaderCollector, ServerRemoved.class); LOG.info("testRemoveServerLeader ending"); } @Test public void testRemoveServerLeaderWithNoFollowers() { LOG.info("testRemoveServerLeaderWithNoFollowers starting"); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(Collections.emptyMap(), new MockRaftActorContext()).withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); leaderActor.tell(new RemoveServer(LEADER_ID), testKit.getRef()); RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), RemoveServerReply.class); assertEquals("getStatus", ServerChangeStatus.NOT_SUPPORTED, removeServerReply.getStatus()); LOG.info("testRemoveServerLeaderWithNoFollowers ending"); } @Test public void testChangeServersVotingStatus() { LOG.info("testChangeServersVotingStatus starting"); DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName()); final String follower1ActorId = actorFactory.generateActorId(FOLLOWER_ID); final String follower1ActorPath = actorFactory.createTestActorPath(follower1ActorId); final String follower2ActorId = actorFactory.generateActorId(FOLLOWER_ID2); final String follower2ActorPath = actorFactory.createTestActorPath(follower2ActorId); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, follower1ActorPath, FOLLOWER_ID2, follower2ActorPath), new MockRaftActorContext()). withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); TestActorRef leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor()); TestActorRef follower1Collector = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector")); TestActorRef follower1RaftActor = actorFactory.createTestActor( CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(), FOLLOWER_ID2, follower2ActorPath), configParams, NO_PERSISTENCE, follower1Collector). withDispatcher(Dispatchers.DefaultDispatcherId()), follower1ActorId); TestActorRef follower2Collector = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector")); TestActorRef follower2RaftActor = actorFactory.createTestActor( CollectingMockRaftActor.props(FOLLOWER_ID2, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(), FOLLOWER_ID, follower1ActorPath), configParams, NO_PERSISTENCE, follower2Collector). withDispatcher(Dispatchers.DefaultDispatcherId()), follower2ActorId); // Send first ChangeServersVotingStatus message leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(FOLLOWER_ID, false, FOLLOWER_ID2, false)), testKit.getRef()); ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class); assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus()); final ApplyState applyState = MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class); assertEquals(0L, applyState.getReplicatedLogEntry().getIndex()); verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(), votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2)); MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class); verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext().getReplicatedLog(), votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2)); MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class); verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext().getReplicatedLog(), votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2)); MessageCollectorActor.clearMessages(leaderCollector); MessageCollectorActor.clearMessages(follower1Collector); MessageCollectorActor.clearMessages(follower2Collector); // Send second ChangeServersVotingStatus message leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(FOLLOWER_ID, true)), testKit.getRef()); reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class); assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus()); MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class); verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(), votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2)); MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class); verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext().getReplicatedLog(), votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2)); MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class); verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext().getReplicatedLog(), votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2)); LOG.info("testChangeServersVotingStatus ending"); } @Test public void testChangeLeaderToNonVoting() { LOG.info("testChangeLeaderToNonVoting starting"); DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(500, TimeUnit.MILLISECONDS)); final String follower1ActorId = actorFactory.generateActorId(FOLLOWER_ID); final String follower1ActorPath = actorFactory.createTestActorPath(follower1ActorId); final String follower2ActorId = actorFactory.generateActorId(FOLLOWER_ID2); final String follower2ActorPath = actorFactory.createTestActorPath(follower2ActorId); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, follower1ActorPath, FOLLOWER_ID2, follower2ActorPath), new MockRaftActorContext()). withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); TestActorRef leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor()); TestActorRef follower1Collector = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector")); TestActorRef follower1RaftActor = actorFactory.createTestActor( CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(), FOLLOWER_ID2, follower2ActorPath), configParams, NO_PERSISTENCE, follower1Collector). withDispatcher(Dispatchers.DefaultDispatcherId()), follower1ActorId); TestActorRef follower2Collector = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector")); TestActorRef follower2RaftActor = actorFactory.createTestActor( CollectingMockRaftActor.props(FOLLOWER_ID2, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(), FOLLOWER_ID, follower1ActorPath), configParams, NO_PERSISTENCE, follower2Collector). withDispatcher(Dispatchers.DefaultDispatcherId()), follower2ActorId); // Send ChangeServersVotingStatus message leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(LEADER_ID, false)), testKit.getRef()); ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class); assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus()); MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class); verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(), nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2)); MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class); verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext().getReplicatedLog(), nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2)); MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class); verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext().getReplicatedLog(), nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2)); verifyRaftState(RaftState.Leader, follower1RaftActor.underlyingActor(), follower2RaftActor.underlyingActor()); verifyRaftState(RaftState.Follower, leaderActor.underlyingActor()); MessageCollectorActor.expectMatching(leaderCollector, AppendEntries.class, 2); LOG.info("testChangeLeaderToNonVoting ending"); } @Test public void testChangeLeaderToNonVotingInSingleNode() { LOG.info("testChangeLeaderToNonVotingInSingleNode starting"); TestActorRef leaderActor = actorFactory.createTestActor( MockLeaderRaftActor.props(ImmutableMap.of(), new MockRaftActorContext()). withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID)); leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(LEADER_ID, false)), testKit.getRef()); ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class); assertEquals("getStatus", ServerChangeStatus.INVALID_REQUEST, reply.getStatus()); LOG.info("testChangeLeaderToNonVotingInSingleNode ending"); } @Test public void testChangeToVotingWithNoLeader() { LOG.info("testChangeToVotingWithNoLeader starting"); DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS)); configParams.setElectionTimeoutFactor(5); final String node1ID = "node1"; final String node2ID = "node2"; // Set up a persisted ServerConfigurationPayload. Initially node1 and node2 will come up as non-voting. // via the server config. The server config will also contain 2 voting peers that are down (ie no // actors created). ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList( new ServerInfo(node1ID, false), new ServerInfo(node2ID, false), new ServerInfo("downNode1", true), new ServerInfo("downNode2", true))); ReplicatedLogImplEntry persistedServerConfigEntry = new ReplicatedLogImplEntry(0, 1, persistedServerConfig); InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "downNode1")); InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry); InMemoryJournal.addEntry(node1ID, 3, new ApplyJournalEntries(0)); InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "downNode2")); InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry); InMemoryJournal.addEntry(node2ID, 3, new ApplyJournalEntries(0)); TestActorRef node1Collector = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector")); TestActorRef node1RaftActorRef = actorFactory.createTestActor( CollectingMockRaftActor.props(node1ID, ImmutableMap.of(), configParams, PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID); CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor(); TestActorRef node2Collector = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector")); TestActorRef node2RaftActorRef = actorFactory.createTestActor( CollectingMockRaftActor.props(node2ID, ImmutableMap.of(), configParams, PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID); CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor(); node1RaftActor.waitForInitializeBehaviorComplete(); node2RaftActor.waitForInitializeBehaviorComplete(); // Verify the intended server config was loaded and applied. verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(), nonVotingServer(node1ID), nonVotingServer(node2ID), votingServer("downNode1"), votingServer("downNode2")); assertEquals("isVotingMember", false, node1RaftActor.getRaftActorContext().isVotingMember()); assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState()); assertEquals("getLeaderId", null, node1RaftActor.getLeaderId()); verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(), nonVotingServer(node1ID), nonVotingServer(node2ID), votingServer("downNode1"), votingServer("downNode2")); assertEquals("isVotingMember", false, node2RaftActor.getRaftActorContext().isVotingMember()); // For the test, we send a ChangeServersVotingStatus message to node1 to flip the voting states for // each server, ie node1 and node2 to voting and the 2 down nodes to non-voting. This should cause // node1 to try to elect itself as leader in order to apply the new server config. Since the 2 // down nodes are switched to non-voting, node1 should only need a vote from node2. // First send the message such that node1 has no peer address for node2 - should fail. ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true, node2ID, true, "downNode1", false, "downNode2", false)); node1RaftActorRef.tell(changeServers, testKit.getRef()); ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class); assertEquals("getStatus", ServerChangeStatus.NO_LEADER, reply.getStatus()); // Send an AppendEntries so node1 has a leaderId MessageCollectorActor.clearMessages(node1Collector); long term = node1RaftActor.getRaftActorContext().getTermInformation().getCurrentTerm(); node1RaftActorRef.tell(new AppendEntries(term, "downNode1", -1L, -1L, Collections.emptyList(), 0, -1, (short)1), ActorRef.noSender()); // Wait for the ElectionTimeout to clear the leaderId. he leaderId must be null so on the // ChangeServersVotingStatus message, it will try to elect a leader. MessageCollectorActor.expectFirstMatching(node1Collector, ElectionTimeout.class); // Update node2's peer address and send the message again node1RaftActor.setPeerAddress(node2ID, node2RaftActorRef.path().toString()); node1RaftActorRef.tell(changeServers, testKit.getRef()); reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class); assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus()); ApplyJournalEntries apply = MessageCollectorActor.expectFirstMatching(node1Collector, ApplyJournalEntries.class); assertEquals("getToIndex", 1, apply.getToIndex()); verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(), votingServer(node1ID), votingServer(node2ID), nonVotingServer("downNode1"), nonVotingServer("downNode2")); assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember()); assertEquals("getRaftState", RaftState.Leader, node1RaftActor.getRaftState()); apply = MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class); assertEquals("getToIndex", 1, apply.getToIndex()); verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(), votingServer(node1ID), votingServer(node2ID), nonVotingServer("downNode1"), nonVotingServer("downNode2")); assertEquals("isVotingMember", true, node2RaftActor.getRaftActorContext().isVotingMember()); assertEquals("getRaftState", RaftState.Follower, node2RaftActor.getRaftState()); LOG.info("testChangeToVotingWithNoLeader ending"); } @Test public void testChangeToVotingWithNoLeaderAndElectionTimeout() { LOG.info("testChangeToVotingWithNoLeaderAndElectionTimeout starting"); final String node1ID = "node1"; final String node2ID = "node2"; PeerAddressResolver peerAddressResolver = peerId -> peerId.equals(node1ID) ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID) ? actorFactory.createTestActorPath(node2ID) : null; ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList( new ServerInfo(node1ID, false), new ServerInfo(node2ID, true))); ReplicatedLogImplEntry persistedServerConfigEntry = new ReplicatedLogImplEntry(0, 1, persistedServerConfig); InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1")); InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry); InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1")); InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry); DefaultConfigParamsImpl configParams1 = new DefaultConfigParamsImpl(); configParams1.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS)); configParams1.setElectionTimeoutFactor(1); configParams1.setPeerAddressResolver(peerAddressResolver); TestActorRef node1Collector = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector")); TestActorRef node1RaftActorRef = actorFactory.createTestActor( CollectingMockRaftActor.props(node1ID, ImmutableMap.of(), configParams1, PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID); CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor(); DefaultConfigParamsImpl configParams2 = new DefaultConfigParamsImpl(); configParams2.setElectionTimeoutFactor(1000000); configParams2.setPeerAddressResolver(peerAddressResolver); TestActorRef node2Collector = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector")); TestActorRef node2RaftActorRef = actorFactory.createTestActor( CollectingMockRaftActor.props(node2ID, ImmutableMap.of(), configParams2, PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID); CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor(); // Send a ChangeServersVotingStatus message to node1 to change mode1 to voting. This should cause // node1 to try to elect itself as leader in order to apply the new server config. But we'll drop // RequestVote messages in node2 which should cause node1 to time out and revert back to the previous // server config and fail with NO_LEADER. Note that node1 shouldn't forward the request to node2 b/c // node2 was previously voting. node2RaftActor.setDropMessageOfType(RequestVote.class); ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true)); node1RaftActorRef.tell(changeServers, testKit.getRef()); ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class); assertEquals("getStatus", ServerChangeStatus.NO_LEADER, reply.getStatus()); assertEquals("Server config", Sets.newHashSet(nonVotingServer(node1ID), votingServer(node2ID)), Sets.newHashSet(node1RaftActor.getRaftActorContext().getPeerServerInfo(true).getServerConfig())); assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState()); LOG.info("testChangeToVotingWithNoLeaderAndElectionTimeout ending"); } @Test public void testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout() { LOG.info("testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout starting"); final String node1ID = "node1"; final String node2ID = "node2"; PeerAddressResolver peerAddressResolver = peerId -> peerId.equals(node1ID) ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID) ? actorFactory.createTestActorPath(node2ID) : null; DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS)); configParams.setElectionTimeoutFactor(3); configParams.setPeerAddressResolver(peerAddressResolver); ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList( new ServerInfo(node1ID, false), new ServerInfo(node2ID, false))); ReplicatedLogImplEntry persistedServerConfigEntry = new ReplicatedLogImplEntry(0, 1, persistedServerConfig); InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1")); InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry); InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1")); InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry); InMemoryJournal.addEntry(node2ID, 3, new ReplicatedLogImplEntry(1, 1, new MockRaftActorContext.MockPayload("2"))); TestActorRef node1Collector = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector")); TestActorRef node1RaftActorRef = actorFactory.createTestActor( CollectingMockRaftActor.props(node1ID, ImmutableMap.of(), configParams, PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID); CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor(); TestActorRef node2Collector = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector")); TestActorRef node2RaftActorRef = actorFactory.createTestActor( CollectingMockRaftActor.props(node2ID, ImmutableMap.of(), configParams, PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID); CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor(); // Send a ChangeServersVotingStatus message to node1 to change mode1 to voting. This should cause // node1 to try to elect itself as leader in order to apply the new server config. However node1's log // is behind node2's so node2 should not grant node1's vote. This should cause node1 to time out and // forward the request to node2. ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus( ImmutableMap.of(node1ID, true, node2ID, true)); node1RaftActorRef.tell(changeServers, testKit.getRef()); ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class); assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus()); MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class); verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(), votingServer(node1ID), votingServer(node2ID)); assertEquals("getRaftState", RaftState.Leader, node2RaftActor.getRaftState()); MessageCollectorActor.expectFirstMatching(node1Collector, ApplyJournalEntries.class); verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(), votingServer(node1ID), votingServer(node2ID)); assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember()); assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState()); LOG.info("testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout ending"); } @Test public void testChangeToVotingWithNoLeaderAndOtherLeaderElected() { LOG.info("testChangeToVotingWithNoLeaderAndOtherLeaderElected starting"); DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS)); configParams.setElectionTimeoutFactor(100000); final String node1ID = "node1"; final String node2ID = "node2"; configParams.setPeerAddressResolver(peerId -> peerId.equals(node1ID) ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID) ? actorFactory.createTestActorPath(node2ID) : null); ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList( new ServerInfo(node1ID, false), new ServerInfo(node2ID, true))); ReplicatedLogImplEntry persistedServerConfigEntry = new ReplicatedLogImplEntry(0, 1, persistedServerConfig); InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1")); InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry); InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1")); InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry); TestActorRef node1Collector = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector")); TestActorRef node1RaftActorRef = actorFactory.createTestActor( CollectingMockRaftActor.props(node1ID, ImmutableMap.of(), configParams, PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID); CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor(); TestActorRef node2Collector = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector")); TestActorRef node2RaftActorRef = actorFactory.createTestActor( CollectingMockRaftActor.props(node2ID, ImmutableMap.of(), configParams, PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID); CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor(); // Send a ChangeServersVotingStatus message to node1 to change node1 to voting. This should cause // node1 to try to elect itself as leader in order to apply the new server config. But we'll drop // RequestVote messages in node2 and make it the leader so node1 should forward the server change // request to node2 when node2 is elected. node2RaftActor.setDropMessageOfType(RequestVote.class); ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true, node2ID, true)); node1RaftActorRef.tell(changeServers, testKit.getRef()); MessageCollectorActor.expectFirstMatching(node2Collector, RequestVote.class); node2RaftActorRef.tell(TimeoutNow.INSTANCE, ActorRef.noSender()); ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class); assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus()); MessageCollectorActor.expectFirstMatching(node1Collector, ApplyJournalEntries.class); verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(), votingServer(node1ID), votingServer(node2ID)); assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember()); assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState()); MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class); verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(), votingServer(node1ID), votingServer(node2ID)); assertEquals("getRaftState", RaftState.Leader, node2RaftActor.getRaftState()); LOG.info("testChangeToVotingWithNoLeaderAndOtherLeaderElected ending"); } private static void verifyRaftState(RaftState expState, RaftActor... raftActors) { Stopwatch sw = Stopwatch.createStarted(); while(sw.elapsed(TimeUnit.SECONDS) <= 5) { for(RaftActor raftActor: raftActors) { if(raftActor.getRaftState() == expState) { return; } } } fail("None of the RaftActors have state " + expState); } private static ServerInfo votingServer(String id) { return new ServerInfo(id, true); } private static ServerInfo nonVotingServer(String id) { return new ServerInfo(id, false); } private TestActorRef newLeaderCollectorActor(MockLeaderRaftActor leaderRaftActor) { return newCollectorActor(leaderRaftActor, LEADER_ID); } private TestActorRef newCollectorActor(AbstractMockRaftActor raftActor, String id) { TestActorRef collectorActor = actorFactory.createTestActor( MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(id + "Collector")); raftActor.setCollectorActor(collectorActor); return collectorActor; } private static void verifyServerConfigurationPayloadEntry(ReplicatedLog log, ServerInfo... expected) { ReplicatedLogEntry logEntry = log.get(log.lastIndex()); assertEquals("Last log entry payload class", ServerConfigurationPayload.class, logEntry.getData().getClass()); ServerConfigurationPayload payload = (ServerConfigurationPayload)logEntry.getData(); assertEquals("Server config", Sets.newHashSet(expected), Sets.newHashSet(payload.getServerConfig())); } private static RaftActorContextImpl newFollowerContext(String id, TestActorRef actor) { DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS)); configParams.setElectionTimeoutFactor(100000); NonPersistentDataProvider noPersistence = new NonPersistentDataProvider(); ElectionTermImpl termInfo = new ElectionTermImpl(noPersistence, id, LOG); termInfo.update(1, LEADER_ID); return new RaftActorContextImpl(actor, actor.underlyingActor().getContext(), id, termInfo, -1, -1, ImmutableMap.of(LEADER_ID, ""), configParams, noPersistence, LOG); } static abstract class AbstractMockRaftActor extends MockRaftActor { private volatile TestActorRef collectorActor; private volatile Class dropMessageOfType; AbstractMockRaftActor(String id, Map peerAddresses, Optional config, boolean persistent, TestActorRef collectorActor) { super(builder().id(id).peerAddresses(peerAddresses).config(config.get()). persistent(Optional.of(persistent))); this.collectorActor = collectorActor; } void setDropMessageOfType(Class dropMessageOfType) { this.dropMessageOfType = dropMessageOfType; } void setCollectorActor(TestActorRef collectorActor) { this.collectorActor = collectorActor; } @Override public void handleCommand(Object message) { if(dropMessageOfType == null || !dropMessageOfType.equals(message.getClass())) { super.handleCommand(message); } if(collectorActor != null) { collectorActor.tell(message, getSender()); } } } public static class CollectingMockRaftActor extends AbstractMockRaftActor { CollectingMockRaftActor(String id, Map peerAddresses, Optional config, boolean persistent, TestActorRef collectorActor) { super(id, peerAddresses, config, persistent, collectorActor); snapshotCohortDelegate = new RaftActorSnapshotCohort() { @Override public void createSnapshot(ActorRef actorRef) { actorRef.tell(new CaptureSnapshotReply(new byte[0]), actorRef); } @Override public void applySnapshot(byte[] snapshotBytes) { } }; } public static Props props(final String id, final Map peerAddresses, ConfigParams config, boolean persistent, TestActorRef collectorActor){ return Props.create(CollectingMockRaftActor.class, id, peerAddresses, Optional.of(config), persistent, collectorActor); } } public static class MockLeaderRaftActor extends AbstractMockRaftActor { public MockLeaderRaftActor(Map peerAddresses, ConfigParams config, RaftActorContext fromContext) { super(LEADER_ID, peerAddresses, Optional.of(config), NO_PERSISTENCE, null); setPersistence(false); RaftActorContext context = getRaftActorContext(); for(int i = 0; i < fromContext.getReplicatedLog().size(); i++) { ReplicatedLogEntry entry = fromContext.getReplicatedLog().get(i); getState().add(entry.getData()); context.getReplicatedLog().append(entry); } context.setCommitIndex(fromContext.getCommitIndex()); context.setLastApplied(fromContext.getLastApplied()); context.getTermInformation().update(fromContext.getTermInformation().getCurrentTerm(), fromContext.getTermInformation().getVotedFor()); } @Override protected void initializeBehavior() { changeCurrentBehavior(new Leader(getRaftActorContext())); initializeBehaviorComplete.countDown(); } @Override public void createSnapshot(ActorRef actorRef) { try { actorRef.tell(new CaptureSnapshotReply(RaftActorTest.fromObject(getState()).toByteArray()), actorRef); } catch (Exception e) { LOG.error("createSnapshot failed", e); } } static Props props(Map peerAddresses, RaftActorContext fromContext) { DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(); configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS)); configParams.setElectionTimeoutFactor(10); return Props.create(MockLeaderRaftActor.class, peerAddresses, configParams, fromContext); } } public static class MockNewFollowerRaftActor extends AbstractMockRaftActor { public MockNewFollowerRaftActor(ConfigParams config, TestActorRef collectorActor) { super(NEW_SERVER_ID, Maps.newHashMap(), Optional.of(config), NO_PERSISTENCE, collectorActor); setPersistence(false); } static Props props(ConfigParams config, TestActorRef collectorActor) { return Props.create(MockNewFollowerRaftActor.class, config, collectorActor); } } }