Examples with RestoredRaftState com.hazelcast.cp.internal.raft.impl.persistence.RestoredRaftState used on opensource projects

Example 1 with RestoredRaftState

use of com.hazelcast.cp.internal.raft.impl.persistence.RestoredRaftState in project hazelcast by hazelcast.

the class PersistenceTest method when_followerIsRestarted_then_itAppliesPreviouslyCommittedMemberList.

@Test
public void when_followerIsRestarted_then_itAppliesPreviouslyCommittedMemberList() throws ExecutionException, InterruptedException {
    RaftAlgorithmConfig config = new RaftAlgorithmConfig().setLeaderHeartbeatPeriodInMillis(SECONDS.toMillis(30));
    group = new LocalRaftGroupBuilder(3, config).setAppendNopEntryOnLeaderElection(true).setRaftStateStoreFactory(RAFT_STATE_STORE_FACTORY).build();
    group.start();
    final RaftNodeImpl leader = group.waitUntilLeaderElected();
    RaftNodeImpl[] followers = group.getNodesExcept(leader.getLocalMember());
    RaftNodeImpl removedFollower = followers[0];
    RaftNodeImpl terminatedFollower = followers[1];
    group.terminateNode(removedFollower.getLocalMember());
    leader.replicate(new ApplyRaftRunnable("val")).get();
    leader.replicateMembershipChange(removedFollower.getLocalMember(), REMOVE).get();
    RaftEndpoint terminatedEndpoint = terminatedFollower.getLocalMember();
    InMemoryRaftStateStore stateStore = getRaftStateStore(terminatedFollower);
    RestoredRaftState terminatedState = stateStore.toRestoredRaftState();
    group.terminateNode(terminatedEndpoint);
    final RaftNodeImpl restartedNode = group.createNewRaftNode(terminatedState, stateStore);
    assertTrueEventually(() -> {
        assertEquals(getCommitIndex(leader), getCommitIndex(restartedNode));
        assertEquals(getLastApplied(leader), getLastApplied(restartedNode));
        assertEquals(new ArrayList<>(getCommittedGroupMembers(leader).members()), new ArrayList<>(getCommittedGroupMembers(restartedNode).members()));
        assertEquals(new ArrayList<>(getLastGroupMembers(leader).members()), new ArrayList<>(getLastGroupMembers(restartedNode).members()));
    });
}

Example 2 with RestoredRaftState

use of com.hazelcast.cp.internal.raft.impl.persistence.RestoredRaftState in project hazelcast by hazelcast.

the class PersistenceTest method testUncommittedEntriesArePersisted.

@Test
public void testUncommittedEntriesArePersisted() {
    group = new LocalRaftGroupBuilder(3).setRaftStateStoreFactory(RAFT_STATE_STORE_FACTORY).build();
    group.start();
    final RaftNodeImpl leader = group.waitUntilLeaderElected();
    RaftNodeImpl[] followers = group.getNodesExcept(leader.getLocalMember());
    final RaftNodeImpl responsiveFollower = followers[0];
    for (int i = 1; i < followers.length; i++) {
        group.dropMessagesToMember(leader.getLocalMember(), followers[i].getLocalMember(), AppendRequest.class);
    }
    final int count = 10;
    for (int i = 0; i < count; i++) {
        leader.replicate(new ApplyRaftRunnable("val" + i));
    }
    assertTrueEventually(() -> {
        for (RaftNodeImpl node : Arrays.asList(leader, responsiveFollower)) {
            RestoredRaftState restoredState = getRestoredState(node);
            LogEntry[] entries = restoredState.entries();
            assertEquals(count, entries.length);
            for (int i = 0; i < count; i++) {
                LogEntry entry = entries[i];
                assertEquals(i + 1, entry.index());
                assertEquals("val" + i, ((ApplyRaftRunnable) entry.operation()).getVal());
            }
        }
    });
}

Example 3 with RestoredRaftState

use of com.hazelcast.cp.internal.raft.impl.persistence.RestoredRaftState in project hazelcast by hazelcast.

the class PersistenceTest method testTermAndVoteArePersisted.

@Test
public void testTermAndVoteArePersisted() {
    group = new LocalRaftGroupBuilder(3).setRaftStateStoreFactory(RAFT_STATE_STORE_FACTORY).build();
    group.start();
    final RaftNodeImpl leader = group.waitUntilLeaderElected();
    final RaftNodeImpl[] followers = group.getNodesExcept(leader.getLocalMember());
    final Set<RaftEndpoint> endpoints = new HashSet<RaftEndpoint>();
    for (RaftNodeImpl node : group.getNodes()) {
        endpoints.add(node.getLocalMember());
    }
    final int term1 = getTerm(leader);
    assertTrueEventually(() -> {
        for (RaftNodeImpl node : group.getNodes()) {
            RestoredRaftState restoredState = getRestoredState(node);
            assertEquals(node.getLocalMember(), restoredState.localEndpoint());
            assertEquals(term1, restoredState.term());
            assertEquals(endpoints, restoredState.initialMembers());
        }
    });
    group.terminateNode(leader.getLocalMember());
    assertTrueEventually(() -> {
        for (RaftNodeImpl node : followers) {
            RaftEndpoint l = node.getLeader();
            assertNotNull(l);
            assertNotEquals(leader.getLeader(), l);
        }
    });
    final RaftNodeImpl newLeader = group.waitUntilLeaderElected();
    final int term2 = getTerm(newLeader);
    assertTrueEventually(() -> {
        for (RaftNodeImpl node : followers) {
            RestoredRaftState restoredState = getRestoredState(node);
            assertEquals(term2, restoredState.term());
            assertEquals(newLeader.getLocalMember(), restoredState.votedFor());
        }
    });
}

Example 4 with RestoredRaftState

use of com.hazelcast.cp.internal.raft.impl.persistence.RestoredRaftState in project hazelcast by hazelcast.

the class PersistenceTest method when_leaderIsRestarted_then_itRestoresItsRaftStateWithSnapshotAndBecomesLeader.

@Test
public void when_leaderIsRestarted_then_itRestoresItsRaftStateWithSnapshotAndBecomesLeader() throws ExecutionException, InterruptedException {
    final int committedEntryCountToSnapshot = 50;
    RaftAlgorithmConfig config = new RaftAlgorithmConfig().setCommitIndexAdvanceCountToSnapshot(committedEntryCountToSnapshot);
    group = new LocalRaftGroupBuilder(3, config).setAppendNopEntryOnLeaderElection(true).setRaftStateStoreFactory(RAFT_STATE_STORE_FACTORY).build();
    group.start();
    RaftNodeImpl leader = group.waitUntilLeaderElected();
    for (int i = 0; i <= committedEntryCountToSnapshot; i++) {
        leader.replicate(new ApplyRaftRunnable("val" + i)).get();
    }
    assertTrue(getSnapshotEntry(leader).index() > 0);
    final int term = getTerm(leader);
    final long commitIndex = getCommitIndex(leader);
    RaftEndpoint terminatedEndpoint = leader.getLocalMember();
    InMemoryRaftStateStore stateStore = getRaftStateStore(leader);
    RestoredRaftState terminatedState = stateStore.toRestoredRaftState();
    // Block voting between followers
    // to avoid a leader election before leader restarts.
    blockVotingBetweenFollowers();
    group.terminateNode(terminatedEndpoint);
    RaftNodeImpl restartedNode = group.createNewRaftNode(terminatedState, stateStore);
    RaftNodeImpl newLeader = group.waitUntilLeaderElected();
    assertSame(restartedNode, newLeader);
    assertTrueEventually(() -> {
        assertTrue(getTerm(restartedNode) > term);
        assertEquals(commitIndex + 1, getCommitIndex(restartedNode));
        RaftDataService service = group.getService(restartedNode);
        Object[] values = service.valuesArray();
        assertThat(values, arrayWithSize(committedEntryCountToSnapshot + 1));
        for (int i = 0; i <= committedEntryCountToSnapshot; i++) {
            assertEquals("val" + i, values[i]);
        }
    });
}

Example 5 with RestoredRaftState

use of com.hazelcast.cp.internal.raft.impl.persistence.RestoredRaftState in project hazelcast by hazelcast.

the class PersistenceTest method when_leaderIsRestarted_then_itBecomesLeaderAndAppliesPreviouslyCommittedMemberList.

@Test
public void when_leaderIsRestarted_then_itBecomesLeaderAndAppliesPreviouslyCommittedMemberList() throws ExecutionException, InterruptedException {
    group = new LocalRaftGroupBuilder(3).setAppendNopEntryOnLeaderElection(true).setRaftStateStoreFactory(RAFT_STATE_STORE_FACTORY).build();
    group.start();
    RaftNodeImpl leader = group.waitUntilLeaderElected();
    RaftNodeImpl[] followers = group.getNodesExcept(leader.getLocalMember());
    RaftNodeImpl removedFollower = followers[0];
    RaftNodeImpl runningFollower = followers[1];
    group.terminateNode(removedFollower.getLocalMember());
    leader.replicate(new ApplyRaftRunnable("val")).get();
    leader.replicateMembershipChange(removedFollower.getLocalMember(), REMOVE).get();
    RaftEndpoint terminatedEndpoint = leader.getLocalMember();
    InMemoryRaftStateStore stateStore = getRaftStateStore(leader);
    RestoredRaftState terminatedState = stateStore.toRestoredRaftState();
    // Block voting between followers
    // to avoid a leader election before leader restarts.
    blockVotingBetweenFollowers();
    group.terminateNode(terminatedEndpoint);
    RaftNodeImpl restartedNode = group.createNewRaftNode(terminatedState, stateStore);
    RaftNodeImpl newLeader = group.waitUntilLeaderElected();
    assertSame(restartedNode, newLeader);
    assertTrueEventually(() -> {
        assertEquals(getCommitIndex(runningFollower), getCommitIndex(restartedNode));
        assertEquals(new ArrayList<>(getCommittedGroupMembers(runningFollower).members()), new ArrayList<>(getCommittedGroupMembers(restartedNode).members()));
        assertEquals(new ArrayList<>(getLastGroupMembers(runningFollower).members()), new ArrayList<>(getLastGroupMembers(restartedNode).members()));
    });
}