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Example 1 with MemberId

use of org.neo4j.causalclustering.identity.MemberId in project neo4j by neo4j.

the class LeaderTest method leaderShouldNotRespondToSuccessResponseThatIndicatesUpToDateFollower.

@Test
public void leaderShouldNotRespondToSuccessResponseThatIndicatesUpToDateFollower() throws Exception {
    // given
    /*
         * A leader who
         * - has an append index of 100
         * - knows about instance 2
         * - assumes that instance 2 is at an index less than 100 -say 84
         */
    Leader leader = new Leader();
    MemberId instance2 = member(2);
    FollowerState instance2State = createArtificialFollowerState(84);
    ReadableRaftState state = mock(ReadableRaftState.class);
    FollowerStates<MemberId> followerState = new FollowerStates<>();
    followerState = new FollowerStates<>(followerState, instance2, instance2State);
    ReadableRaftLog logMock = mock(ReadableRaftLog.class);
    when(logMock.appendIndex()).thenReturn(100L);
    when(state.commitIndex()).thenReturn(-1L);
    when(state.entryLog()).thenReturn(logMock);
    when(state.followerStates()).thenReturn(followerState);
    // both leader and follower are in the same term
    when(state.term()).thenReturn(4L);
    // when
    // that leader is asked to handle a response from that follower that says that the follower is up to date
    RaftMessages.AppendEntries.Response response = appendEntriesResponse().success().matchIndex(100).term(4).from(instance2).build();
    Outcome outcome = leader.handle(response, state, mock(Log.class));
    // then
    // The leader should not be trying to send any messages to that instance
    assertTrue(outcome.getOutgoingMessages().isEmpty());
    // And the follower state should be updated
    FollowerStates<MemberId> updatedFollowerStates = outcome.getFollowerStates();
    assertEquals(100, updatedFollowerStates.get(instance2).getMatchIndex());
}
Also used : MemberId(org.neo4j.causalclustering.identity.MemberId) ReadableRaftLog(org.neo4j.causalclustering.core.consensus.log.ReadableRaftLog) InMemoryRaftLog(org.neo4j.causalclustering.core.consensus.log.InMemoryRaftLog) Log(org.neo4j.logging.Log) ReadableRaftLog(org.neo4j.causalclustering.core.consensus.log.ReadableRaftLog) RaftLog(org.neo4j.causalclustering.core.consensus.log.RaftLog) Outcome(org.neo4j.causalclustering.core.consensus.outcome.Outcome) FollowerStates(org.neo4j.causalclustering.core.consensus.roles.follower.FollowerStates) AppendEntries(org.neo4j.causalclustering.core.consensus.RaftMessages.AppendEntries) FollowerState(org.neo4j.causalclustering.core.consensus.roles.follower.FollowerState) ReadableRaftState(org.neo4j.causalclustering.core.consensus.state.ReadableRaftState) Test(org.junit.Test)

Example 2 with MemberId

use of org.neo4j.causalclustering.identity.MemberId in project neo4j by neo4j.

the class LeaderTest method leaderShouldRespondToSuccessResponseThatIndicatesLaggingFollowerWithJustWhatItsMissing.

@Test
public void leaderShouldRespondToSuccessResponseThatIndicatesLaggingFollowerWithJustWhatItsMissing() throws Exception {
    // given
    /*
         * A leader who
         * - has an append index of 100
         * - knows about instance 2
         * - assumes that instance 2 is at an index less than 100 -say 50
         */
    Leader leader = new Leader();
    MemberId instance2 = member(2);
    FollowerState instance2State = createArtificialFollowerState(50);
    ReadableRaftState state = mock(ReadableRaftState.class);
    FollowerStates<MemberId> followerState = new FollowerStates<>();
    followerState = new FollowerStates<>(followerState, instance2, instance2State);
    ReadableRaftLog logMock = mock(ReadableRaftLog.class);
    when(logMock.appendIndex()).thenReturn(100L);
    // with commit requests in this test
    when(state.commitIndex()).thenReturn(-1L);
    when(state.entryLog()).thenReturn(logMock);
    when(state.followerStates()).thenReturn(followerState);
    // both leader and follower are in the same term
    when(state.term()).thenReturn(231L);
    // when that leader is asked to handle a response from that follower that says that the follower is still
    // missing things
    RaftMessages.AppendEntries.Response response = appendEntriesResponse().success().matchIndex(89).term(231).from(instance2).build();
    Outcome outcome = leader.handle(response, state, mock(Log.class));
    // then
    int matchCount = 0;
    for (ShipCommand shipCommand : outcome.getShipCommands()) {
        if (shipCommand instanceof ShipCommand.Match) {
            matchCount++;
        }
    }
    assertThat(matchCount, greaterThan(0));
}
Also used : ShipCommand(org.neo4j.causalclustering.core.consensus.outcome.ShipCommand) InMemoryRaftLog(org.neo4j.causalclustering.core.consensus.log.InMemoryRaftLog) Log(org.neo4j.logging.Log) ReadableRaftLog(org.neo4j.causalclustering.core.consensus.log.ReadableRaftLog) RaftLog(org.neo4j.causalclustering.core.consensus.log.RaftLog) AppendEntries(org.neo4j.causalclustering.core.consensus.RaftMessages.AppendEntries) ReadableRaftState(org.neo4j.causalclustering.core.consensus.state.ReadableRaftState) MemberId(org.neo4j.causalclustering.identity.MemberId) ReadableRaftLog(org.neo4j.causalclustering.core.consensus.log.ReadableRaftLog) Outcome(org.neo4j.causalclustering.core.consensus.outcome.Outcome) FollowerStates(org.neo4j.causalclustering.core.consensus.roles.follower.FollowerStates) FollowerState(org.neo4j.causalclustering.core.consensus.roles.follower.FollowerState) Test(org.junit.Test)

Example 3 with MemberId

use of org.neo4j.causalclustering.identity.MemberId in project neo4j by neo4j.

the class LeaderTest method leaderShouldSpawnMismatchCommandOnFailure.

// TODO: rethink this test, it does too much
@Test
public void leaderShouldSpawnMismatchCommandOnFailure() throws Exception {
    // given
    /*
         * A leader who
         * - has an append index of 100
         * - knows about instance 2
         * - assumes that instance 2 is fully caught up
         */
    Leader leader = new Leader();
    MemberId instance2 = member(2);
    FollowerState instance2State = createArtificialFollowerState(100);
    ReadableRaftState state = mock(ReadableRaftState.class);
    FollowerStates<MemberId> followerState = new FollowerStates<>();
    followerState = new FollowerStates<>(followerState, instance2, instance2State);
    RaftLog log = new InMemoryRaftLog();
    for (int i = 0; i <= 100; i++) {
        log.append(new RaftLogEntry(0, valueOf(i)));
    }
    when(state.commitIndex()).thenReturn(-1L);
    when(state.entryLog()).thenReturn(log);
    when(state.followerStates()).thenReturn(followerState);
    // both leader and follower are in the same term
    when(state.term()).thenReturn(4L);
    // when
    // that leader is asked to handle a response from that follower that says that the follower is still missing
    // things
    RaftMessages.AppendEntries.Response response = appendEntriesResponse().failure().appendIndex(0).matchIndex(-1).term(4).from(instance2).build();
    Outcome outcome = leader.handle(response, state, mock(Log.class));
    // then
    int mismatchCount = 0;
    for (ShipCommand shipCommand : outcome.getShipCommands()) {
        if (shipCommand instanceof ShipCommand.Mismatch) {
            mismatchCount++;
        }
    }
    assertThat(mismatchCount, greaterThan(0));
}
Also used : ShipCommand(org.neo4j.causalclustering.core.consensus.outcome.ShipCommand) InMemoryRaftLog(org.neo4j.causalclustering.core.consensus.log.InMemoryRaftLog) Log(org.neo4j.logging.Log) ReadableRaftLog(org.neo4j.causalclustering.core.consensus.log.ReadableRaftLog) RaftLog(org.neo4j.causalclustering.core.consensus.log.RaftLog) AppendEntries(org.neo4j.causalclustering.core.consensus.RaftMessages.AppendEntries) ReadableRaftState(org.neo4j.causalclustering.core.consensus.state.ReadableRaftState) RaftLogEntry(org.neo4j.causalclustering.core.consensus.log.RaftLogEntry) MemberId(org.neo4j.causalclustering.identity.MemberId) InMemoryRaftLog(org.neo4j.causalclustering.core.consensus.log.InMemoryRaftLog) Outcome(org.neo4j.causalclustering.core.consensus.outcome.Outcome) FollowerStates(org.neo4j.causalclustering.core.consensus.roles.follower.FollowerStates) FollowerState(org.neo4j.causalclustering.core.consensus.roles.follower.FollowerState) InMemoryRaftLog(org.neo4j.causalclustering.core.consensus.log.InMemoryRaftLog) ReadableRaftLog(org.neo4j.causalclustering.core.consensus.log.ReadableRaftLog) RaftLog(org.neo4j.causalclustering.core.consensus.log.RaftLog) Test(org.junit.Test)

Example 4 with MemberId

use of org.neo4j.causalclustering.identity.MemberId in project neo4j by neo4j.

the class LeaderTest method leaderShouldNotRespondToSuccessResponseFromFollowerThatWillSoonUpToDateViaInFlightMessages.

@Test
public void leaderShouldNotRespondToSuccessResponseFromFollowerThatWillSoonUpToDateViaInFlightMessages() throws Exception {
    // given
    /*
         * A leader who
         * - has an append index of 100
         * - knows about instance 2
         * - assumes that instance 2 is at an index less than 100 -say 84 but it has already been sent up to 100
         */
    Leader leader = new Leader();
    MemberId instance2 = member(2);
    FollowerState instance2State = createArtificialFollowerState(84);
    ReadableRaftState state = mock(ReadableRaftState.class);
    FollowerStates<MemberId> followerState = new FollowerStates<>();
    followerState = new FollowerStates<>(followerState, instance2, instance2State);
    ReadableRaftLog logMock = mock(ReadableRaftLog.class);
    when(logMock.appendIndex()).thenReturn(100L);
    when(state.commitIndex()).thenReturn(-1L);
    when(state.entryLog()).thenReturn(logMock);
    when(state.followerStates()).thenReturn(followerState);
    // both leader and follower are in the same term
    when(state.term()).thenReturn(4L);
    // when
    // that leader is asked to handle a response from that follower that says that the follower is up to date
    RaftMessages.AppendEntries.Response response = appendEntriesResponse().success().matchIndex(90).term(4).from(instance2).build();
    Outcome outcome = leader.handle(response, state, mock(Log.class));
    // then
    // The leader should not be trying to send any messages to that instance
    assertTrue(outcome.getOutgoingMessages().isEmpty());
    // And the follower state should be updated
    FollowerStates<MemberId> leadersViewOfFollowerStates = outcome.getFollowerStates();
    assertEquals(90, leadersViewOfFollowerStates.get(instance2).getMatchIndex());
}
Also used : MemberId(org.neo4j.causalclustering.identity.MemberId) ReadableRaftLog(org.neo4j.causalclustering.core.consensus.log.ReadableRaftLog) InMemoryRaftLog(org.neo4j.causalclustering.core.consensus.log.InMemoryRaftLog) Log(org.neo4j.logging.Log) ReadableRaftLog(org.neo4j.causalclustering.core.consensus.log.ReadableRaftLog) RaftLog(org.neo4j.causalclustering.core.consensus.log.RaftLog) Outcome(org.neo4j.causalclustering.core.consensus.outcome.Outcome) FollowerStates(org.neo4j.causalclustering.core.consensus.roles.follower.FollowerStates) AppendEntries(org.neo4j.causalclustering.core.consensus.RaftMessages.AppendEntries) FollowerState(org.neo4j.causalclustering.core.consensus.roles.follower.FollowerState) ReadableRaftState(org.neo4j.causalclustering.core.consensus.state.ReadableRaftState) Test(org.junit.Test)

Example 5 with MemberId

use of org.neo4j.causalclustering.identity.MemberId in project neo4j by neo4j.

the class CoreReplicatedContentMarshalTest method shouldMarshalIdRangeRequest.

@Test
public void shouldMarshalIdRangeRequest() throws Exception {
    ByteBuf buffer = Unpooled.buffer();
    ReplicatedContent message = new ReplicatedIdAllocationRequest(new MemberId(UUID.randomUUID()), IdType.PROPERTY, 100, 200);
    assertMarshalingEquality(buffer, message);
}
Also used : MemberId(org.neo4j.causalclustering.identity.MemberId) ReplicatedIdAllocationRequest(org.neo4j.causalclustering.core.state.machines.id.ReplicatedIdAllocationRequest) ByteBuf(io.netty.buffer.ByteBuf) NetworkFlushableByteBuf(org.neo4j.causalclustering.messaging.NetworkFlushableByteBuf) Test(org.junit.Test)

Aggregations

MemberId (org.neo4j.causalclustering.identity.MemberId)114 Test (org.junit.Test)83 HashMap (java.util.HashMap)26 CoreTopology (org.neo4j.causalclustering.discovery.CoreTopology)16 CoreServerInfo (org.neo4j.causalclustering.discovery.CoreServerInfo)15 LeaderLocator (org.neo4j.causalclustering.core.consensus.LeaderLocator)13 ReadReplicaTopology (org.neo4j.causalclustering.discovery.ReadReplicaTopology)12 DirectNetworking (org.neo4j.causalclustering.core.consensus.DirectNetworking)10 RaftTestFixture (org.neo4j.causalclustering.core.consensus.RaftTestFixture)10 CoreTopologyService (org.neo4j.causalclustering.discovery.CoreTopologyService)10 Log (org.neo4j.logging.Log)10 ClusterId (org.neo4j.causalclustering.identity.ClusterId)9 ArrayList (java.util.ArrayList)8 UUID (java.util.UUID)8 RaftMessages (org.neo4j.causalclustering.core.consensus.RaftMessages)8 TopologyService (org.neo4j.causalclustering.discovery.TopologyService)7 ByteBuf (io.netty.buffer.ByteBuf)6 File (java.io.File)6 RaftLogEntry (org.neo4j.causalclustering.core.consensus.log.RaftLogEntry)6 HashSet (java.util.HashSet)5