Examples with ApplyRaftRunnable com.hazelcast.cp.internal.raft.impl.dataservice.ApplyRaftRunnable used on opensource projects

Example 36 with ApplyRaftRunnable

use of com.hazelcast.cp.internal.raft.impl.dataservice.ApplyRaftRunnable in project hazelcast by hazelcast.

the class PersistenceTest method when_followerIsRestarted_then_itRestoresItsRaftState.

@Test
public void when_followerIsRestarted_then_itRestoresItsRaftState() throws ExecutionException, InterruptedException {
    group = new LocalRaftGroupBuilder(3).setRaftStateStoreFactory(RAFT_STATE_STORE_FACTORY).build();
    group.start();
    final RaftNodeImpl leader = group.waitUntilLeaderElected();
    RaftNodeImpl terminatedFollower = group.getAnyFollowerNode();
    final int count = 10;
    for (int i = 0; i < count; i++) {
        leader.replicate(new ApplyRaftRunnable("val" + i)).get();
    }
    assertTrueEventually(() -> assertEquals(getCommitIndex(leader), getCommitIndex(terminatedFollower)));
    RaftEndpoint terminatedEndpoint = terminatedFollower.getLocalMember();
    InMemoryRaftStateStore stateStore = getRaftStateStore(terminatedFollower);
    RestoredRaftState terminatedState = stateStore.toRestoredRaftState();
    group.terminateNode(terminatedEndpoint);
    leader.replicate(new ApplyRaftRunnable("val" + count)).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(count + 1));
        for (int i = 0; i <= count; i++) {
            assertEquals("val" + i, values[i]);
        }
    });
}

Example 37 with ApplyRaftRunnable

use of com.hazelcast.cp.internal.raft.impl.dataservice.ApplyRaftRunnable in project hazelcast by hazelcast.

the class PersistenceTest method when_leaderIsRestarted_then_itBecomesFollowerAndRestoresItsRaftState.

@Test
public void when_leaderIsRestarted_then_itBecomesFollowerAndRestoresItsRaftState() throws ExecutionException, InterruptedException {
    group = new LocalRaftGroupBuilder(3).setRaftStateStoreFactory(RAFT_STATE_STORE_FACTORY).setAppendNopEntryOnLeaderElection(true).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();
    }
    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(count));
        for (int i = 0; i < count; i++) {
            assertEquals("val" + i, values[i]);
        }
    });
}

Example 38 with ApplyRaftRunnable

use of com.hazelcast.cp.internal.raft.impl.dataservice.ApplyRaftRunnable in project hazelcast by hazelcast.

the class PersistenceTest method when_followerIsRestarted_then_itAppliesPreviouslyCommittedMemberListViaSnapshot.

@Test
public void when_followerIsRestarted_then_itAppliesPreviouslyCommittedMemberListViaSnapshot() throws ExecutionException, InterruptedException {
    int committedEntryCountToSnapshot = 50;
    RaftAlgorithmConfig config = new RaftAlgorithmConfig().setCommitIndexAdvanceCountToSnapshot(committedEntryCountToSnapshot).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();
    while (getSnapshotEntry(terminatedFollower).index() == 0) {
        leader.replicate(new ApplyRaftRunnable("val")).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 39 with ApplyRaftRunnable

use of com.hazelcast.cp.internal.raft.impl.dataservice.ApplyRaftRunnable in project hazelcast by hazelcast.

the class PersistenceTest method when_leaderAppendEntriesInMinoritySplit_then_itTruncatesEntriesOnStore.

@Test
public void when_leaderAppendEntriesInMinoritySplit_then_itTruncatesEntriesOnStore() throws ExecutionException, InterruptedException {
    group = new LocalRaftGroupBuilder(3).setRaftStateStoreFactory(RAFT_STATE_STORE_FACTORY).build();
    group.start();
    final RaftNodeImpl leader = group.waitUntilLeaderElected();
    leader.replicate(new ApplyRaftRunnable("val1")).get();
    assertTrueEventually(() -> {
        for (RaftNodeImpl raftNode : group.getNodes()) {
            assertEquals(1, getCommitIndex(raftNode));
        }
    });
    final RaftNodeImpl[] followers = group.getNodesExcept(leader.getLocalMember());
    group.split(leader.getLocalMember());
    assertTrueEventually(() -> {
        for (RaftNodeImpl raftNode : followers) {
            RaftEndpoint leaderEndpoint = getLeaderMember(raftNode);
            assertNotNull(leaderEndpoint);
            assertNotEquals(leader.getLocalMember(), leaderEndpoint);
        }
    });
    for (int i = 0; i < 10; i++) {
        leader.replicate(new ApplyRaftRunnable("isolated" + i));
    }
    assertTrueEventually(() -> {
        RestoredRaftState restoredState = getRestoredState(leader);
        LogEntry[] entries = restoredState.entries();
        assertEquals(11, entries.length);
        assertEquals("val1", ((ApplyRaftRunnable) entries[0].operation()).getVal());
        for (int i = 1; i < 11; i++) {
            assertEquals("isolated" + (i - 1), ((ApplyRaftRunnable) entries[i].operation()).getVal());
        }
    });
    RaftNodeImpl newLeader = group.getNode(getLeaderMember(followers[0]));
    for (int i = 0; i < 10; i++) {
        newLeader.replicate(new ApplyRaftRunnable("valNew" + i)).get();
    }
    assertTrueEventually(() -> {
        for (RaftNodeImpl raftNode : followers) {
            assertEquals(11, getCommitIndex(raftNode));
        }
    });
    group.merge();
    RaftNodeImpl finalLeader = group.waitUntilLeaderElected();
    assertNotEquals(leader.getLocalMember(), finalLeader.getLocalMember());
    assertTrueEventually(() -> {
        RestoredRaftState state = getRestoredState(leader);
        LogEntry[] entries = state.entries();
        assertEquals(11, entries.length);
        assertEquals("val1", ((ApplyRaftRunnable) entries[0].operation()).getVal());
        for (int i = 1; i < 11; i++) {
            assertEquals("valNew" + (i - 1), ((ApplyRaftRunnable) entries[i].operation()).getVal());
        }
    });
}

Example 40 with ApplyRaftRunnable

use of com.hazelcast.cp.internal.raft.impl.dataservice.ApplyRaftRunnable in project hazelcast by hazelcast.

the class SnapshotTest method when_leaderMissesInstallSnapshotResponse_then_itAdvancesMatchIndexWithNextInstallSnapshotResponse.

@Test
public void when_leaderMissesInstallSnapshotResponse_then_itAdvancesMatchIndexWithNextInstallSnapshotResponse() throws ExecutionException, InterruptedException {
    final int entryCount = 50;
    RaftAlgorithmConfig config = new RaftAlgorithmConfig().setCommitIndexAdvanceCountToSnapshot(entryCount).setAppendRequestBackoffTimeoutInMillis(1000);
    group = newGroup(3, config);
    group.start();
    RaftNodeImpl leader = group.waitUntilLeaderElected();
    RaftNodeImpl[] followers = group.getNodesExcept(leader.getLocalMember());
    RaftNodeImpl slowFollower = followers[1];
    // the leader cannot send AppendEntriesRPC to the follower
    group.dropMessagesToMember(leader.getLocalMember(), slowFollower.getLocalMember(), AppendRequest.class);
    // the follower cannot send append response to the leader after installing the snapshot
    group.dropMessagesToMember(slowFollower.getLocalMember(), leader.getLocalMember(), AppendSuccessResponse.class);
    for (int i = 0; i < entryCount; i++) {
        leader.replicate(new ApplyRaftRunnable("val" + i)).get();
    }
    assertTrueEventually(() -> assertEquals(entryCount, getSnapshotEntry(leader).index()));
    leader.replicate(new ApplyRaftRunnable("valFinal")).get();
    group.resetAllRulesFrom(leader.getLocalMember());
    assertTrueEventually(() -> {
        for (RaftNodeImpl raftNode : group.getNodesExcept(slowFollower.getLocalMember())) {
            assertEquals(entryCount + 1, getCommitIndex(raftNode));
            RaftDataService service = group.getService(raftNode);
            assertEquals(entryCount + 1, service.size());
            for (int i = 0; i < entryCount; i++) {
                assertEquals(("val" + i), service.get(i + 1));
            }
            assertEquals("valFinal", service.get(51));
        }
        assertEquals(entryCount, getCommitIndex(slowFollower));
        RaftDataService service = group.getService(slowFollower);
        assertEquals(entryCount, service.size());
        for (int i = 0; i < entryCount; i++) {
            assertEquals(("val" + i), service.get(i + 1));
        }
    });
    group.resetAllRulesFrom(slowFollower.getLocalMember());
    long commitIndex = getCommitIndex(leader);
    assertTrueEventually(() -> {
        for (RaftNode raftNode : group.getNodesExcept(leader.getLocalMember())) {
            assertEquals(commitIndex, getMatchIndex(leader, raftNode.getLocalMember()));
        }
    });
}