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

Example 6 with RestoredRaftState

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

the class PersistenceTest method testSnapshotIsPersisted.

@Test
public void testSnapshotIsPersisted() throws ExecutionException, InterruptedException {
    final int committedEntryCountToSnapshot = 50;
    RaftAlgorithmConfig config = new RaftAlgorithmConfig().setCommitIndexAdvanceCountToSnapshot(committedEntryCountToSnapshot);
    group = new LocalRaftGroupBuilder(3, config).setRaftStateStoreFactory(RAFT_STATE_STORE_FACTORY).build();
    group.start();
    final RaftNodeImpl leader = group.waitUntilLeaderElected();
    for (int i = 0; i < committedEntryCountToSnapshot; i++) {
        leader.replicate(new ApplyRaftRunnable("val" + i)).get();
    }
    assertTrueEventually(() -> {
        assertEquals(committedEntryCountToSnapshot, getSnapshotEntry(leader).index());
        for (RaftNodeImpl node : group.getNodes()) {
            RestoredRaftState restoredState = getRestoredState(node);
            SnapshotEntry snapshot = restoredState.snapshot();
            assertNotNull(snapshot);
            assertEquals(committedEntryCountToSnapshot, snapshot.index());
        }
    });
}

Example 7 with RestoredRaftState

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

the class PersistenceTest method when_leaderIsRestarted_then_itBecomesFollowerAndRestoresItsRaftStateWithSnapshot.

@Test
public void when_leaderIsRestarted_then_itBecomesFollowerAndRestoresItsRaftStateWithSnapshot() 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);
    RaftEndpoint terminatedEndpoint = leader.getLocalMember();
    InMemoryRaftStateStore stateStore = getRaftStateStore(leader);
    RestoredRaftState terminatedState = stateStore.toRestoredRaftState();
    group.terminateNode(terminatedEndpoint);
    final RaftNodeImpl newLeader = group.waitUntilLeaderElected();
    final RaftNodeImpl restartedNode = group.createNewRaftNode(terminatedState, stateStore);
    assertEquals(new ArrayList<>(getCommittedGroupMembers(newLeader).members()), new ArrayList<>(getCommittedGroupMembers(restartedNode).members()));
    assertEquals(new ArrayList<>(getLastGroupMembers(newLeader).members()), new ArrayList<>(getLastGroupMembers(restartedNode).members()));
    assertTrueEventually(() -> {
        assertEquals(newLeader.getLocalMember(), restartedNode.getLeader());
        assertEquals(getTerm(newLeader), getTerm(restartedNode));
        assertEquals(getCommitIndex(newLeader), getCommitIndex(restartedNode));
        assertEquals(getLastApplied(newLeader), getLastApplied(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 8 with RestoredRaftState

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

the class PersistenceTest method testCommittedEntriesArePersisted.

@Test
public void testCommittedEntriesArePersisted() throws ExecutionException, InterruptedException {
    group = new LocalRaftGroupBuilder(3).setRaftStateStoreFactory(RAFT_STATE_STORE_FACTORY).build();
    group.start();
    RaftNodeImpl leader = group.waitUntilLeaderElected();
    final int count = 10;
    for (int i = 0; i < count; i++) {
        leader.replicate(new ApplyRaftRunnable("val" + i)).get();
    }
    assertTrueEventually(() -> {
        for (RaftNodeImpl node : group.getNodes()) {
            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 9 with RestoredRaftState

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

the class PersistenceTest method when_followerIsRestarted_then_itRestoresItsRaftStateWithSnapshot.

@Test
public void when_followerIsRestarted_then_itRestoresItsRaftStateWithSnapshot() 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();
    final RaftNodeImpl leader = group.waitUntilLeaderElected();
    for (int i = 0; i <= committedEntryCountToSnapshot; i++) {
        leader.replicate(new ApplyRaftRunnable("val" + i)).get();
    }
    assertTrueEventually(() -> {
        for (RaftNodeImpl node : group.getNodes()) {
            assertTrue(getSnapshotEntry(node).index() > 0);
        }
    });
    RaftNodeImpl terminatedFollower = group.getAnyFollowerNode();
    RaftEndpoint terminatedEndpoint = terminatedFollower.getLocalMember();
    InMemoryRaftStateStore stateStore = getRaftStateStore(terminatedFollower);
    RestoredRaftState terminatedState = stateStore.toRestoredRaftState();
    group.terminateNode(terminatedEndpoint);
    leader.replicate(new ApplyRaftRunnable("val" + (committedEntryCountToSnapshot + 1))).get();
    final RaftNodeImpl restartedNode = group.createNewRaftNode(terminatedState, stateStore);
    assertEquals(new ArrayList<>(getCommittedGroupMembers(leader).members()), new ArrayList<>(getCommittedGroupMembers(restartedNode).members()));
    assertEquals(new ArrayList<>(getLastGroupMembers(leader).members()), new ArrayList<>(getLastGroupMembers(restartedNode).members()));
    assertTrueEventually(() -> {
        assertEquals(leader.getLocalMember(), restartedNode.getLeader());
        assertEquals(getTerm(leader), getTerm(restartedNode));
        assertEquals(getCommitIndex(leader), getCommitIndex(restartedNode));
        assertEquals(getLastApplied(leader), getLastApplied(restartedNode));
        RaftDataService service = group.getService(restartedNode);
        Object[] values = service.valuesArray();
        assertThat(values, arrayWithSize(committedEntryCountToSnapshot + 2));
        for (int i = 0; i <= committedEntryCountToSnapshot + 1; i++) {
            assertEquals("val" + i, values[i]);
        }
    });
}

Example 10 with RestoredRaftState

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

the class PersistenceTest method when_leaderIsRestarted_then_itBecomesLeaderAndAppliesPreviouslyCommittedMemberListViaSnapshot.

@Test
public void when_leaderIsRestarted_then_itBecomesLeaderAndAppliesPreviouslyCommittedMemberListViaSnapshot() throws ExecutionException, InterruptedException {
    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();
    RaftNodeImpl[] followers = group.getNodesExcept(leader.getLocalMember());
    RaftNodeImpl removedFollower = followers[0];
    final RaftNodeImpl runningFollower = followers[1];
    group.terminateNode(removedFollower.getLocalMember());
    leader.replicate(new ApplyRaftRunnable("val")).get();
    leader.replicateMembershipChange(removedFollower.getLocalMember(), REMOVE).get();
    while (getSnapshotEntry(leader).index() == 0) {
        leader.replicate(new ApplyRaftRunnable("val")).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()));
    });
}