Examples with PeerChanges org.apache.ratis.server.impl.MiniRaftCluster.PeerChanges used on opensource projects

Example 1 with PeerChanges

use of org.apache.ratis.server.impl.MiniRaftCluster.PeerChanges in project incubator-ratis by apache.

the class RaftReconfigurationBaseTest method runTestReconfTimeout.

void runTestReconfTimeout(CLUSTER cluster) throws Exception {
    final RaftPeerId leaderId = RaftTestUtil.waitForLeader(cluster).getId();
    try (final RaftClient client = cluster.createClient(leaderId)) {
        PeerChanges c1 = cluster.addNewPeers(2, false);
        LOG.info("Start changing the configuration: {}", asList(c1.allPeersInNewConf));
        Assert.assertFalse(((RaftConfigurationImpl) cluster.getLeader().getRaftConf()).isTransitional());
        final RaftClientRpc sender = client.getClientRpc();
        final SetConfigurationRequest request = cluster.newSetConfigurationRequest(client.getId(), leaderId, c1.allPeersInNewConf);
        try {
            sender.sendRequest(request);
            Assert.fail("did not get expected exception");
        } catch (IOException e) {
            Assert.assertTrue("Got exception " + e, e instanceof ReconfigurationTimeoutException);
        }
        // the two new peers have not started yet, the bootstrapping must timeout
        LOG.info(cluster.printServers());
        // state so that we still get timeout instead of in-progress exception
        try {
            sender.sendRequest(request);
            Assert.fail("did not get expected exception");
        } catch (IOException e) {
            Assert.assertTrue("Got exception " + e, e instanceof ReconfigurationTimeoutException);
        }
        // start the two new peers
        LOG.info("Start new peers");
        for (RaftPeer np : c1.newPeers) {
            cluster.restartServer(np.getId(), false);
        }
        Assert.assertTrue(client.admin().setConfiguration(c1.allPeersInNewConf).isSuccess());
    }
}

Example 2 with PeerChanges

use of org.apache.ratis.server.impl.MiniRaftCluster.PeerChanges in project incubator-ratis by apache.

the class RaftReconfigurationBaseTest method runTestKillLeaderDuringReconf.

void runTestKillLeaderDuringReconf(CLUSTER cluster) throws Exception {
    final AtomicBoolean clientRunning = new AtomicBoolean(true);
    Thread clientThread = null;
    try {
        final RaftPeerId leaderId = RaftTestUtil.waitForLeader(cluster).getId();
        PeerChanges c1 = cluster.addNewPeers(1, false);
        PeerChanges c2 = cluster.removePeers(1, false, asList(c1.newPeers));
        LOG.info("Start setConf: {}", asList(c2.allPeersInNewConf));
        LOG.info(cluster.printServers());
        final CompletableFuture<Void> setConf = new CompletableFuture<>();
        clientThread = new Thread(() -> {
            try (final RaftClient client = cluster.createClient(leaderId)) {
                for (int i = 0; clientRunning.get() && !setConf.isDone(); i++) {
                    final RaftClientReply reply = client.admin().setConfiguration(c2.allPeersInNewConf);
                    if (reply.isSuccess()) {
                        setConf.complete(null);
                    }
                    LOG.info("setConf attempt #{} failed, {}", i, cluster.printServers());
                }
            } catch (Exception e) {
                LOG.error("Failed to setConf", e);
                setConf.completeExceptionally(e);
            }
        });
        clientThread.start();
        TimeUnit.SECONDS.sleep(1);
        // the leader cannot generate the (old, new) conf, and it will keep
        // bootstrapping the 2 new peers since they have not started yet
        Assert.assertFalse(((RaftConfigurationImpl) cluster.getLeader().getRaftConf()).isTransitional());
        // only (0) the first conf entry, (1) the 1st setConf entry and (2) a metadata entry
        {
            final RaftLog leaderLog = cluster.getLeader().getRaftLog();
            for (LogEntryProto e : RaftTestUtil.getLogEntryProtos(leaderLog)) {
                LOG.info("{}", LogProtoUtils.toLogEntryString(e));
            }
            final long commitIndex = leaderLog.getLastCommittedIndex();
            Assert.assertTrue("commitIndex = " + commitIndex + " > 2", commitIndex <= 2);
        }
        final RaftPeerId killed = RaftTestUtil.waitAndKillLeader(cluster);
        Assert.assertEquals(leaderId, killed);
        final RaftPeerId newLeaderId = RaftTestUtil.waitForLeader(cluster).getId();
        LOG.info("newLeaderId: {}", newLeaderId);
        LOG.info("start new peers: {}", Arrays.asList(c1.newPeers));
        for (RaftPeer np : c1.newPeers) {
            cluster.restartServer(np.getId(), false);
        }
        try {
            setConf.get(10, TimeUnit.SECONDS);
        } catch (TimeoutException ignored) {
        }
        // the client fails with the first leader, and then retry the same setConfiguration request
        waitAndCheckNewConf(cluster, c2.allPeersInNewConf, 2, Collections.singletonList(leaderId));
        setConf.get(1, TimeUnit.SECONDS);
    } finally {
        if (clientThread != null) {
            clientRunning.set(false);
            clientThread.interrupt();
        }
    }
}

Example 3 with PeerChanges

use of org.apache.ratis.server.impl.MiniRaftCluster.PeerChanges in project incubator-ratis by apache.

the class RaftReconfigurationBaseTest method runTestRevertConfigurationChange.

void runTestRevertConfigurationChange(CLUSTER cluster) throws Exception {
    RaftLogBase log2 = null;
    try {
        RaftTestUtil.waitForLeader(cluster);
        final RaftServer.Division leader = cluster.getLeader();
        final RaftPeerId leaderId = leader.getId();
        final RaftLog log = leader.getRaftLog();
        log2 = (RaftLogBase) log;
        Thread.sleep(1000);
        // we block the incoming msg for the leader and block its requests to
        // followers, so that we force the leader change and the old leader will
        // not know
        LOG.info("start blocking the leader");
        BlockRequestHandlingInjection.getInstance().blockReplier(leaderId.toString());
        cluster.setBlockRequestsFrom(leaderId.toString(), true);
        PeerChanges change = cluster.removePeers(1, false, new ArrayList<>());
        AtomicBoolean gotNotLeader = new AtomicBoolean(false);
        final Thread clientThread = new Thread(() -> {
            try (final RaftClient client = cluster.createClient(leaderId)) {
                LOG.info("client starts to change conf");
                final RaftClientRpc sender = client.getClientRpc();
                RaftClientReply reply = sender.sendRequest(cluster.newSetConfigurationRequest(client.getId(), leaderId, change.allPeersInNewConf));
                if (reply.getNotLeaderException() != null) {
                    gotNotLeader.set(true);
                }
            } catch (IOException e) {
                LOG.warn("Got unexpected exception when client1 changes conf", e);
            }
        });
        clientThread.start();
        // find ConfigurationEntry
        final TimeDuration sleepTime = TimeDuration.valueOf(500, TimeUnit.MILLISECONDS);
        final long confIndex = JavaUtils.attemptRepeatedly(() -> {
            final long last = log.getLastEntryTermIndex().getIndex();
            for (long i = last; i >= 1; i--) {
                if (log.get(i).hasConfigurationEntry()) {
                    return i;
                }
            }
            throw new Exception("ConfigurationEntry not found: last=" + last);
        }, 10, sleepTime, "confIndex", LOG);
        // wait till the old leader persist the new conf
        JavaUtils.attemptRepeatedly(() -> {
            Assert.assertTrue(log.getFlushIndex() >= confIndex);
            return null;
        }, 10, sleepTime, "FLUSH", LOG);
        final long committed = log.getLastCommittedIndex();
        Assert.assertTrue(committed < confIndex);
        // unblock the old leader
        BlockRequestHandlingInjection.getInstance().unblockReplier(leaderId.toString());
        cluster.setBlockRequestsFrom(leaderId.toString(), false);
        // the client should get NotLeaderException
        clientThread.join(5000);
        Assert.assertTrue(gotNotLeader.get());
        // the old leader should have truncated the setConf from the log
        JavaUtils.attemptRepeatedly(() -> {
            Assert.assertTrue(log.getLastCommittedIndex() >= confIndex);
            return null;
        }, 10, ONE_SECOND, "COMMIT", LOG);
        Assert.assertTrue(log.get(confIndex).hasConfigurationEntry());
        log2 = null;
    } finally {
        RaftStorageTestUtils.printLog(log2, s -> LOG.info(s));
    }
}

Example 4 with PeerChanges

use of org.apache.ratis.server.impl.MiniRaftCluster.PeerChanges in project incubator-ratis by apache.

the class RetryCacheTests method runTestRetryOnNewLeader.

void runTestRetryOnNewLeader(CLUSTER cluster) throws Exception {
    RaftTestUtil.waitForLeader(cluster);
    final RaftPeerId leaderId = cluster.getLeaderAndSendFirstMessage(false).getId();
    try (final RaftClient client = cluster.createClient(leaderId)) {
        RaftClientRpc rpc = client.getClientRpc();
        final long callId = 999;
        RaftClientRequest r = cluster.newRaftClientRequest(client.getId(), leaderId, callId, new SimpleMessage("message"));
        assertReply(rpc.sendRequest(r), client, callId);
        final long oldLastApplied = cluster.getLeader().getInfo().getLastAppliedIndex();
        // trigger the reconfiguration, make sure the original leader is kicked out
        PeerChanges change = cluster.addNewPeers(2, true);
        RaftPeer[] allPeers = cluster.removePeers(2, true, asList(change.newPeers)).allPeersInNewConf;
        // trigger setConfiguration
        cluster.setConfiguration(allPeers);
        final RaftPeerId newLeaderId = JavaUtils.attemptRepeatedly(() -> {
            final RaftPeerId id = RaftTestUtil.waitForLeader(cluster).getId();
            Assert.assertNotEquals(leaderId, id);
            return id;
        }, 10, TimeDuration.valueOf(100, TimeUnit.MILLISECONDS), "wait for a leader different than " + leaderId, LOG);
        Assert.assertNotEquals(leaderId, newLeaderId);
        // same clientId and callId in the request
        r = cluster.newRaftClientRequest(client.getId(), newLeaderId, callId, new SimpleMessage("message"));
        rpc.addRaftPeers(Arrays.asList(change.newPeers));
        for (int i = 0; i < 10; i++) {
            try {
                assertReply(rpc.sendRequest(r), client, callId);
                LOG.info("successfully sent out the retry request_" + i);
            } catch (Exception e) {
                LOG.info("hit exception while retrying the same request: " + r, e);
            }
            Thread.sleep(100);
        }
        // check the new leader and make sure the retry did not get committed
        Assert.assertEquals(0, count(cluster.getLeader().getRaftLog(), oldLastApplied + 1));
    }
}

Example 5 with PeerChanges

use of org.apache.ratis.server.impl.MiniRaftCluster.PeerChanges in project incubator-ratis by apache.

the class RaftReconfigurationBaseTest method runTestAddRemovePeers.

private void runTestAddRemovePeers(boolean leaderStepdown, CLUSTER cluster) throws Exception {
    RaftTestUtil.waitForLeader(cluster);
    PeerChanges change = cluster.addNewPeers(2, true);
    RaftPeer[] allPeers = cluster.removePeers(2, leaderStepdown, asList(change.newPeers)).allPeersInNewConf;
    // trigger setConfiguration
    cluster.setConfiguration(allPeers);
    // wait for the new configuration to take effect
    waitAndCheckNewConf(cluster, allPeers, 2, null);
}