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

Example 21 with ApplyRaftRunnable

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

the class LocalRaftTest method when_leaderStaysInMinority_then_itDemotesItselfToFollower.

@Test
public void when_leaderStaysInMinority_then_itDemotesItselfToFollower() {
    group = newGroup(3);
    group.start();
    RaftNodeImpl leader = group.waitUntilLeaderElected();
    group.split(leader.getLocalMember());
    InternalCompletableFuture f = leader.replicate(new ApplyRaftRunnable("val"));
    try {
        f.joinInternal();
        fail();
    } catch (StaleAppendRequestException ignored) {
    }
}

Example 22 with ApplyRaftRunnable

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

the class LocalRaftTest method when_leaderCrashes_then_theFollowerWithLongestLogMayNotBecomeLeaderIfItsLogIsNotMajority.

@Test
public void when_leaderCrashes_then_theFollowerWithLongestLogMayNotBecomeLeaderIfItsLogIsNotMajority() throws Exception {
    group = newGroup(5);
    group.start();
    RaftNodeImpl leader = group.waitUntilLeaderElected();
    leader.replicate(new ApplyRaftRunnable("val1")).get();
    RaftNodeImpl[] followers = group.getNodesExcept(leader.getLocalMember());
    RaftNodeImpl followerWithLongestLog = followers[0];
    long commitIndex = getCommitIndex(leader);
    assertTrueEventually(() -> {
        for (RaftNodeImpl raftNode : group.getNodes()) {
            assertEquals(commitIndex, getCommitIndex(raftNode));
        }
    });
    for (int i = 1; i < followers.length; i++) {
        group.dropMessagesToMember(leader.getLocalMember(), followers[i].getLocalMember(), AppendRequest.class);
    }
    leader.replicate(new ApplyRaftRunnable("val2"));
    assertTrueEventually(() -> assertTrue(getLastLogOrSnapshotEntry(followerWithLongestLog).index() > commitIndex));
    assertTrueAllTheTime(() -> {
        for (RaftNodeImpl raftNode : group.getNodes()) {
            assertEquals(commitIndex, getCommitIndex(raftNode));
        }
    }, 10);
    group.dropMessagesToMember(followerWithLongestLog.getLocalMember(), followers[1].getLocalMember(), VoteRequest.class);
    group.dropMessagesToMember(followerWithLongestLog.getLocalMember(), followers[2].getLocalMember(), VoteRequest.class);
    group.terminateNode(leader.getLocalMember());
    RaftNodeImpl newLeader = group.waitUntilLeaderElected();
    // followerWithLongestLog has 2 entries, other 3 followers have 1 entry
    // and those 3 followers will elect a leader among themselves
    assertTrueEventually(() -> {
        for (RaftNodeImpl raftNode : followers) {
            RaftEndpoint newLeader1 = getLeaderMember(raftNode);
            assertNotEquals(leader.getLocalMember(), newLeader1);
            assertNotEquals(followerWithLongestLog.getLocalMember(), newLeader1);
        }
    });
    for (int i = 1; i < followers.length; i++) {
        assertEquals(commitIndex, getCommitIndex(followers[i]));
        assertEquals(commitIndex, getLastLogOrSnapshotEntry(followers[i]).index());
    }
    // followerWithLongestLog does not truncate its extra log entry until the new leader appends a new entry
    assertTrue(getLastLogOrSnapshotEntry(followerWithLongestLog).index() > commitIndex);
    newLeader.replicate(new ApplyRaftRunnable("val3")).get();
    assertTrueEventually(() -> {
        for (RaftNodeImpl follower : followers) {
            assertEquals(2, getCommitIndex(follower));
            RaftDataService service = group.getService(follower);
            assertEquals(2, service.size());
            assertEquals("val1", service.get(1));
            assertEquals("val3", service.get(2));
        }
    });
    assertEquals(2, getLastLogOrSnapshotEntry(followerWithLongestLog).index());
}

Example 23 with ApplyRaftRunnable

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

the class SnapshotTest method when_followersMatchIndexIsUnknown_then_itInstallsSnapshot.

@Test
public void when_followersMatchIndexIsUnknown_then_itInstallsSnapshot() throws ExecutionException, InterruptedException {
    final int entryCount = 50;
    RaftAlgorithmConfig config = new RaftAlgorithmConfig().setCommitIndexAdvanceCountToSnapshot(entryCount);
    group = newGroup(3, config);
    group.start();
    RaftNodeImpl leader = group.waitUntilLeaderElected();
    RaftNodeImpl[] followers = group.getNodesExcept(leader.getLocalMember());
    RaftNodeImpl slowFollower = followers[1];
    group.dropMessagesToMember(leader.getLocalMember(), slowFollower.getLocalMember(), AppendRequest.class);
    group.dropMessagesToMember(leader.getLocalMember(), slowFollower.getLocalMember(), InstallSnapshot.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.allowMessagesToMember(leader.getLocalMember(), slowFollower.getLocalMember(), InstallSnapshot.class);
    assertTrueEventually(() -> assertEquals(entryCount, getCommitIndex(slowFollower)));
    group.resetAllRulesFrom(leader.getLocalMember());
    assertTrueEventually(() -> {
        for (RaftNodeImpl raftNode : group.getNodes()) {
            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));
        }
    });
}

Example 24 with ApplyRaftRunnable

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

the class SnapshotTest method when_snapshotIsTaken_then_nextEntryIsCommitted.

@Test
public void when_snapshotIsTaken_then_nextEntryIsCommitted() throws ExecutionException, InterruptedException {
    final int entryCount = 50;
    RaftAlgorithmConfig config = new RaftAlgorithmConfig().setCommitIndexAdvanceCountToSnapshot(entryCount);
    group = newGroup(3, config);
    group.start();
    RaftNodeImpl leader = group.waitUntilLeaderElected();
    for (int i = 0; i < entryCount; i++) {
        leader.replicate(new ApplyRaftRunnable("val" + i)).get();
    }
    assertTrueEventually(() -> {
        for (RaftNodeImpl raftNode : group.getNodes()) {
            assertEquals(entryCount, getCommitIndex(raftNode));
            assertEquals(entryCount, getSnapshotEntry(raftNode).index());
        }
    });
    leader.replicate(new ApplyRaftRunnable("valFinal")).get();
    assertTrueEventually(() -> {
        for (RaftNodeImpl raftNode : group.getNodes()) {
            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));
        }
    });
}

Example 25 with ApplyRaftRunnable

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

the class SnapshotTest method when_followersLastAppendIsMembershipChange_then_itUpdatesRaftNodeStateWithInstalledSnapshot.

@Test
public void when_followersLastAppendIsMembershipChange_then_itUpdatesRaftNodeStateWithInstalledSnapshot() throws ExecutionException, InterruptedException {
    final int entryCount = 50;
    final RaftAlgorithmConfig config = new RaftAlgorithmConfig().setCommitIndexAdvanceCountToSnapshot(entryCount);
    group = newGroup(5, config);
    group.start();
    RaftNodeImpl leader = group.waitUntilLeaderElected();
    RaftNodeImpl[] followers = group.getNodesExcept(leader.getLocalMember());
    leader.replicate(new ApplyRaftRunnable("val")).get();
    assertTrueEventually(() -> {
        for (RaftNodeImpl follower : followers) {
            assertEquals(1L, getCommitIndex(follower));
        }
    });
    RaftNodeImpl slowFollower = followers[0];
    for (RaftNodeImpl follower : followers) {
        if (follower != slowFollower) {
            group.dropMessagesToMember(follower.getLocalMember(), follower.getLeader(), AppendSuccessResponse.class);
            group.dropMessagesToMember(follower.getLocalMember(), follower.getLeader(), AppendFailureResponse.class);
        }
    }
    RaftNodeImpl newRaftNode1 = group.createNewRaftNode();
    Future f1 = leader.replicateMembershipChange(newRaftNode1.getLocalMember(), MembershipChangeMode.ADD);
    assertTrueEventually(() -> {
        for (RaftNodeImpl follower : followers) {
            assertEquals(2L, getLastLogOrSnapshotEntry(follower).index());
        }
    });
    group.dropMessagesToMember(leader.getLocalMember(), slowFollower.getLocalMember(), AppendRequest.class);
    group.dropMessagesToMember(leader.getLocalMember(), slowFollower.getLocalMember(), InstallSnapshot.class);
    for (RaftNodeImpl follower : followers) {
        if (follower != slowFollower) {
            group.allowAllMessagesToMember(follower.getLocalMember(), leader.getLeader());
        }
    }
    f1.get();
    for (int i = 0; i < entryCount; i++) {
        leader.replicate(new ApplyRaftRunnable("val" + i)).get();
    }
    assertTrueEventually(() -> assertThat(getSnapshotEntry(leader).index(), greaterThanOrEqualTo((long) entryCount)));
    group.allowAllMessagesToMember(leader.getLeader(), slowFollower.getLocalMember());
    assertTrueEventually(() -> assertThat(getSnapshotEntry(slowFollower).index(), greaterThanOrEqualTo((long) entryCount)));
    assertTrueEventually(() -> {
        assertEquals(getCommittedGroupMembers(leader).index(), getCommittedGroupMembers(slowFollower).index());
        assertEquals(ACTIVE, getStatus(slowFollower));
    });
}