Examples with Node com.alipay.sofa.jraft.Node used on opensource projects

Example 56 with Node

use of com.alipay.sofa.jraft.Node in project sofa-jraft by sofastack.

the class NodeTest method readCommittedUserLog.

@Test
public void readCommittedUserLog() throws Exception {
    // setup cluster
    final List<PeerId> peers = TestUtils.generatePeers(3);
    final TestCluster cluster = new TestCluster("unitest", this.dataPath, peers, 1000);
    for (final PeerId peer : peers) {
        assertTrue(cluster.start(peer.getEndpoint()));
    }
    cluster.waitLeader();
    final Node leader = cluster.getLeader();
    assertNotNull(leader);
    this.sendTestTaskAndWait(leader);
    // index == 1 is a CONFIGURATION log, so real_index will be 2 when returned.
    UserLog userLog = leader.readCommittedUserLog(1);
    assertNotNull(userLog);
    assertEquals(2, userLog.getIndex());
    assertEquals("hello0", new String(userLog.getData().array()));
    // index == 5 is a DATA log(a user log)
    userLog = leader.readCommittedUserLog(5);
    assertNotNull(userLog);
    assertEquals(5, userLog.getIndex());
    assertEquals("hello3", new String(userLog.getData().array()));
    // index == 15 is greater than last_committed_index
    try {
        assertNull(leader.readCommittedUserLog(15));
        fail();
    } catch (final LogIndexOutOfBoundsException e) {
        assertEquals(e.getMessage(), "Request index 15 is greater than lastAppliedIndex: 11");
    }
    // index == 0 invalid request
    try {
        assertNull(leader.readCommittedUserLog(0));
        fail();
    } catch (final LogIndexOutOfBoundsException e) {
        assertEquals(e.getMessage(), "Request index is invalid: 0");
    }
    LOG.info("Trigger leader snapshot");
    CountDownLatch latch = new CountDownLatch(1);
    leader.snapshot(new ExpectClosure(latch));
    waitLatch(latch);
    // remove and add a peer to add two CONFIGURATION logs
    final List<Node> followers = cluster.getFollowers();
    assertEquals(2, followers.size());
    final Node testFollower = followers.get(0);
    latch = new CountDownLatch(1);
    leader.removePeer(testFollower.getNodeId().getPeerId(), new ExpectClosure(latch));
    waitLatch(latch);
    latch = new CountDownLatch(1);
    leader.addPeer(testFollower.getNodeId().getPeerId(), new ExpectClosure(latch));
    waitLatch(latch);
    this.sendTestTaskAndWait(leader, 10, RaftError.SUCCESS);
    // trigger leader snapshot for the second time, after this the log of index 1~11 will be deleted.
    LOG.info("Trigger leader snapshot");
    latch = new CountDownLatch(1);
    leader.snapshot(new ExpectClosure(latch));
    waitLatch(latch);
    Thread.sleep(100);
    // index == 5 log has been deleted in log_storage.
    try {
        leader.readCommittedUserLog(5);
        fail();
    } catch (final LogNotFoundException e) {
        assertEquals("User log is deleted at index: 5", e.getMessage());
    }
    // index == 12、index == 13、index=14、index=15 are 4 CONFIGURATION logs(joint consensus), so real_index will be 16 when returned.
    userLog = leader.readCommittedUserLog(12);
    assertNotNull(userLog);
    assertEquals(16, userLog.getIndex());
    assertEquals("hello10", new String(userLog.getData().array()));
    // now index == 17 is a user log
    userLog = leader.readCommittedUserLog(17);
    assertNotNull(userLog);
    assertEquals(17, userLog.getIndex());
    assertEquals("hello11", new String(userLog.getData().array()));
    cluster.ensureSame();
    assertEquals(3, cluster.getFsms().size());
    for (final MockStateMachine fsm : cluster.getFsms()) {
        assertEquals(20, fsm.getLogs().size());
        for (int i = 0; i < 20; i++) {
            assertEquals("hello" + i, new String(fsm.getLogs().get(i).array()));
        }
    }
    cluster.stopAll();
}

Example 57 with Node

use of com.alipay.sofa.jraft.Node in project sofa-jraft by sofastack.

the class NodeTest method testTripleNodesWithLearners.

@Test
public void testTripleNodesWithLearners() throws Exception {
    final List<PeerId> peers = TestUtils.generatePeers(3);
    final TestCluster cluster = new TestCluster("unittest", this.dataPath, peers);
    for (final PeerId peer : peers) {
        assertTrue(cluster.start(peer.getEndpoint()));
    }
    // elect leader
    cluster.waitLeader();
    // get leader
    final Node leader = cluster.getLeader();
    assertNotNull(leader);
    assertEquals(3, leader.listPeers().size());
    assertTrue(leader.listLearners().isEmpty());
    assertTrue(leader.listAliveLearners().isEmpty());
    {
        // Adds a learner
        SynchronizedClosure done = new SynchronizedClosure();
        PeerId learnerPeer = new PeerId(TestUtils.getMyIp(), TestUtils.INIT_PORT + 3);
        // Start learner
        assertTrue(cluster.startLearner(learnerPeer));
        leader.addLearners(Arrays.asList(learnerPeer), done);
        assertTrue(done.await().isOk());
        assertEquals(1, leader.listAliveLearners().size());
        assertEquals(1, leader.listLearners().size());
    }
    // apply tasks to leader
    this.sendTestTaskAndWait(leader);
    {
        final ByteBuffer data = ByteBuffer.wrap("no closure".getBytes());
        final Task task = new Task(data, null);
        leader.apply(task);
    }
    {
        // task with TaskClosure
        final ByteBuffer data = ByteBuffer.wrap("task closure".getBytes());
        final Vector<String> cbs = new Vector<>();
        final CountDownLatch latch = new CountDownLatch(1);
        final Task task = new Task(data, new TaskClosure() {

            @Override
            public void run(final Status status) {
                cbs.add("apply");
                latch.countDown();
            }

            @Override
            public void onCommitted() {
                cbs.add("commit");
            }
        });
        leader.apply(task);
        latch.await();
        assertEquals(2, cbs.size());
        assertEquals("commit", cbs.get(0));
        assertEquals("apply", cbs.get(1));
    }
    assertEquals(4, cluster.getFsms().size());
    assertEquals(2, cluster.getFollowers().size());
    assertEquals(1, cluster.getLearners().size());
    cluster.ensureSame(-1);
    {
        // Adds another learner
        SynchronizedClosure done = new SynchronizedClosure();
        PeerId learnerPeer = new PeerId(TestUtils.getMyIp(), TestUtils.INIT_PORT + 4);
        // Start learner
        assertTrue(cluster.startLearner(learnerPeer));
        leader.addLearners(Arrays.asList(learnerPeer), done);
        assertTrue(done.await().isOk());
        assertEquals(2, leader.listAliveLearners().size());
        assertEquals(2, leader.listLearners().size());
    }
    {
        // stop two followers
        for (Node follower : cluster.getFollowers()) {
            assertTrue(cluster.stop(follower.getNodeId().getPeerId().getEndpoint()));
        }
        // send a new task
        final ByteBuffer data = ByteBuffer.wrap("task closure".getBytes());
        SynchronizedClosure done = new SynchronizedClosure();
        leader.apply(new Task(data, done));
        // should fail
        assertFalse(done.await().isOk());
        assertEquals(RaftError.EPERM, done.getStatus().getRaftError());
        // One peer with two learners.
        assertEquals(3, cluster.getFsms().size());
        cluster.ensureSame(-1);
    }
    cluster.stopAll();
}

Example 58 with Node

use of com.alipay.sofa.jraft.Node in project sofa-jraft by sofastack.

the class NodeTest method testSetPeer1.

@Test
public void testSetPeer1() throws Exception {
    final TestCluster cluster = new TestCluster("testSetPeer1", this.dataPath, new ArrayList<>());
    final PeerId bootPeer = new PeerId(TestUtils.getMyIp(), TestUtils.INIT_PORT);
    assertTrue(cluster.start(bootPeer.getEndpoint()));
    final List<Node> nodes = cluster.getFollowers();
    assertEquals(1, nodes.size());
    final List<PeerId> peers = new ArrayList<>();
    peers.add(bootPeer);
    // reset peers from empty
    assertTrue(nodes.get(0).resetPeers(new Configuration(peers)).isOk());
    cluster.waitLeader();
    assertNotNull(cluster.getLeader());
    cluster.stopAll();
}

Example 59 with Node

use of com.alipay.sofa.jraft.Node in project sofa-jraft by sofastack.

the class NodeTest method testAppendEntriesWhenFollowerIsInErrorState.

@Test
public void testAppendEntriesWhenFollowerIsInErrorState() throws Exception {
    // start five nodes
    final List<PeerId> peers = TestUtils.generatePeers(5);
    final TestCluster cluster = new TestCluster("unitest", this.dataPath, peers, 1000);
    for (final PeerId peer : peers) {
        assertTrue(cluster.start(peer.getEndpoint()));
    }
    cluster.waitLeader();
    final Node oldLeader = cluster.getLeader();
    assertNotNull(oldLeader);
    // apply something
    this.sendTestTaskAndWait(oldLeader);
    // set one follower into error state
    final List<Node> followers = cluster.getFollowers();
    assertEquals(4, followers.size());
    final Node errorNode = followers.get(0);
    final PeerId errorPeer = errorNode.getNodeId().getPeerId().copy();
    final Endpoint errorFollowerAddr = errorPeer.getEndpoint();
    LOG.info("Set follower {} into error state", errorNode);
    ((NodeImpl) errorNode).onError(new RaftException(EnumOutter.ErrorType.ERROR_TYPE_STATE_MACHINE, new Status(-1, "Follower has something wrong.")));
    // increase term  by stopping leader and electing a new leader again
    final Endpoint oldLeaderAddr = oldLeader.getNodeId().getPeerId().getEndpoint().copy();
    assertTrue(cluster.stop(oldLeaderAddr));
    cluster.waitLeader();
    final Node leader = cluster.getLeader();
    assertNotNull(leader);
    LOG.info("Elect a new leader {}", leader);
    // apply something again
    this.sendTestTaskAndWait(leader, 10, RaftError.SUCCESS);
    // stop error follower
    Thread.sleep(20);
    LOG.info("Stop error follower {}", errorNode);
    assertTrue(cluster.stop(errorFollowerAddr));
    // restart error and old leader
    LOG.info("Restart error follower {} and old leader {}", errorFollowerAddr, oldLeaderAddr);
    assertTrue(cluster.start(errorFollowerAddr));
    assertTrue(cluster.start(oldLeaderAddr));
    cluster.ensureSame();
    assertEquals(5, cluster.getFsms().size());
    for (final MockStateMachine fsm : cluster.getFsms()) {
        assertEquals(20, fsm.getLogs().size());
    }
    cluster.stopAll();
}

Example 60 with Node

use of com.alipay.sofa.jraft.Node in project sofa-jraft by sofastack.

the class NodeTest method testRollbackStateMachineWithReadIndex_Issue317.

/**
 * Test rollback stateMachine with readIndex for issue 317:
 * https://github.com/sofastack/sofa-jraft/issues/317
 */
@Test
public void testRollbackStateMachineWithReadIndex_Issue317() throws Exception {
    final Endpoint addr = new Endpoint(TestUtils.getMyIp(), TestUtils.INIT_PORT);
    final PeerId peer = new PeerId(addr, 0);
    NodeManager.getInstance().addAddress(addr);
    final NodeOptions nodeOptions = createNodeOptionsWithSharedTimer();
    final CountDownLatch applyCompleteLatch = new CountDownLatch(1);
    final CountDownLatch applyLatch = new CountDownLatch(1);
    final CountDownLatch readIndexLatch = new CountDownLatch(1);
    final AtomicInteger currentValue = new AtomicInteger(-1);
    final String errorMsg = this.testName.getMethodName();
    final StateMachine fsm = new StateMachineAdapter() {

        @Override
        public void onApply(final Iterator iter) {
            // Notify that the #onApply is preparing to go.
            readIndexLatch.countDown();
            // Wait for submitting a read-index request
            try {
                applyLatch.await();
            } catch (InterruptedException e) {
                fail();
            }
            int i = 0;
            while (iter.hasNext()) {
                byte[] data = iter.next().array();
                int v = Bits.getInt(data, 0);
                assertEquals(i++, v);
                currentValue.set(v);
            }
            if (i > 0) {
                // rollback
                currentValue.set(i - 1);
                iter.setErrorAndRollback(1, new Status(-1, errorMsg));
                applyCompleteLatch.countDown();
            }
        }
    };
    nodeOptions.setFsm(fsm);
    nodeOptions.setLogUri(this.dataPath + File.separator + "log");
    nodeOptions.setRaftMetaUri(this.dataPath + File.separator + "meta");
    nodeOptions.setSnapshotUri(this.dataPath + File.separator + "snapshot");
    nodeOptions.setInitialConf(new Configuration(Collections.singletonList(peer)));
    final Node node = new NodeImpl("unittest", peer);
    assertTrue(node.init(nodeOptions));
    assertEquals(1, node.listPeers().size());
    assertTrue(node.listPeers().contains(peer));
    while (!node.isLeader()) {
        ;
    }
    int n = 5;
    {
        // apply tasks
        for (int i = 0; i < n; i++) {
            byte[] b = new byte[4];
            Bits.putInt(b, 0, i);
            node.apply(new Task(ByteBuffer.wrap(b), null));
        }
    }
    final AtomicInteger readIndexSuccesses = new AtomicInteger(0);
    {
        // Submit a read-index, wait for #onApply
        readIndexLatch.await();
        final CountDownLatch latch = new CountDownLatch(1);
        node.readIndex(null, new ReadIndexClosure() {

            @Override
            public void run(final Status status, final long index, final byte[] reqCtx) {
                try {
                    if (status.isOk()) {
                        readIndexSuccesses.incrementAndGet();
                    } else {
                        assertTrue("Unexpected status: " + status, status.getErrorMsg().contains(errorMsg) || status.getRaftError() == RaftError.ETIMEDOUT || status.getErrorMsg().contains("Invalid state for readIndex: STATE_ERROR"));
                    }
                } finally {
                    latch.countDown();
                }
            }
        });
        // We have already submit a read-index request,
        // notify #onApply can go right now
        applyLatch.countDown();
        // The state machine is in error state, the node should step down.
        while (node.isLeader()) {
            Thread.sleep(10);
        }
        latch.await();
        applyCompleteLatch.await();
    }
    // No read-index request succeed.
    assertEquals(0, readIndexSuccesses.get());
    assertTrue(n - 1 >= currentValue.get());
    node.shutdown();
    node.join();
}