Examples with FollowerState org.neo4j.causalclustering.core.consensus.roles.follower.FollowerState used on opensource projects

Example 11 with FollowerState

use of org.neo4j.causalclustering.core.consensus.roles.follower.FollowerState in project neo4j by neo4j.

the class CatchupGoalTrackerTest method shouldFailToAchieveGoalDueToCatchupTimeoutExpiring.

@Test
public void shouldFailToAchieveGoalDueToCatchupTimeoutExpiring() throws Exception {
    FakeClock clock = Clocks.fakeClock();
    StubLog log = new StubLog();
    log.setAppendIndex(10);
    CatchupGoalTracker catchupGoalTracker = new CatchupGoalTracker(log, clock, ROUND_TIMEOUT, CATCHUP_TIMEOUT);
    // when
    clock.forward(CATCHUP_TIMEOUT + 10, TimeUnit.MILLISECONDS);
    catchupGoalTracker.updateProgress(new FollowerState().onSuccessResponse(4));
    // then
    assertFalse(catchupGoalTracker.isGoalAchieved());
    assertTrue(catchupGoalTracker.isFinished());
}

Example 12 with FollowerState

use of org.neo4j.causalclustering.core.consensus.roles.follower.FollowerState in project neo4j by neo4j.

the class CatchupGoalTrackerTest method shouldFailToAchieveGoalDueToCatchupTimeoutExpiringEvenThoughWeDoEventuallyAchieveTarget.

@Test
public void shouldFailToAchieveGoalDueToCatchupTimeoutExpiringEvenThoughWeDoEventuallyAchieveTarget() throws Exception {
    FakeClock clock = Clocks.fakeClock();
    StubLog log = new StubLog();
    log.setAppendIndex(10);
    CatchupGoalTracker catchupGoalTracker = new CatchupGoalTracker(log, clock, ROUND_TIMEOUT, CATCHUP_TIMEOUT);
    // when
    clock.forward(CATCHUP_TIMEOUT + 10, TimeUnit.MILLISECONDS);
    catchupGoalTracker.updateProgress(new FollowerState().onSuccessResponse(10));
    // then
    assertFalse(catchupGoalTracker.isGoalAchieved());
    assertTrue(catchupGoalTracker.isFinished());
}

Example 13 with FollowerState

use of org.neo4j.causalclustering.core.consensus.roles.follower.FollowerState in project neo4j by neo4j.

the class LeaderTest method leaderShouldIgnoreSuccessResponseThatIndicatesLaggingWhileLocalStateIndicatesFollowerIsCaughtUp.

@Test
public void leaderShouldIgnoreSuccessResponseThatIndicatesLaggingWhileLocalStateIndicatesFollowerIsCaughtUp() 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);
    int j = 100;
    FollowerState instance2State = createArtificialFollowerState(j);
    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(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().success().matchIndex(80).term(4).from(instance2).build();
    Outcome outcome = leader.handle(response, state, mock(Log.class));
    // then the leader should not send anything, since this is a delayed, out of order response to a previous append
    // request
    assertTrue(outcome.getOutgoingMessages().isEmpty());
    // The follower state should not be touched
    FollowerStates<MemberId> updatedFollowerStates = outcome.getFollowerStates();
    assertEquals(100, updatedFollowerStates.get(instance2).getMatchIndex());
}