Examples with RaftLog org.apache.ratis.server.storage.RaftLog used on opensource projects

Example 1 with RaftLog

use of org.apache.ratis.server.storage.RaftLog in project incubator-ratis by apache.

the class RaftBasicTests method testOldLeaderCommit.

@Test
public void testOldLeaderCommit() throws Exception {
    LOG.info("Running testOldLeaderCommit");
    final MiniRaftCluster cluster = getCluster();
    final RaftServerImpl leader = waitForLeader(cluster);
    final RaftPeerId leaderId = leader.getId();
    final long term = leader.getState().getCurrentTerm();
    List<RaftServerImpl> followers = cluster.getFollowers();
    final RaftServerImpl followerToSendLog = followers.get(0);
    for (int i = 1; i < NUM_SERVERS - 1; i++) {
        RaftServerImpl follower = followers.get(i);
        cluster.killServer(follower.getId());
    }
    SimpleMessage[] messages = SimpleMessage.create(1);
    RaftTestUtil.sendMessageInNewThread(cluster, messages);
    Thread.sleep(cluster.getMaxTimeout() + 100);
    RaftLog followerLog = followerToSendLog.getState().getLog();
    assertTrue(logEntriesContains(followerLog, messages));
    LOG.info(String.format("killing old leader: %s", leaderId.toString()));
    cluster.killServer(leaderId);
    for (int i = 1; i < 3; i++) {
        RaftServerImpl follower = followers.get(i);
        LOG.info(String.format("restarting follower: %s", follower.getId().toString()));
        cluster.restartServer(follower.getId(), false);
    }
    Thread.sleep(cluster.getMaxTimeout() * 5);
    // confirm the server with log is elected as new leader.
    final RaftPeerId newLeaderId = waitForLeader(cluster).getId();
    Assert.assertEquals(followerToSendLog.getId(), newLeaderId);
    cluster.getServerAliveStream().map(s -> s.getState().getLog()).forEach(log -> RaftTestUtil.assertLogEntries(log, false, term, messages));
    LOG.info("terminating testOldLeaderCommit test");
}

Example 2 with RaftLog

use of org.apache.ratis.server.storage.RaftLog in project incubator-ratis by apache.

the class TestRaftStream method testSimpleWrite.

@Test
public void testSimpleWrite() throws Exception {
    final int numRequests = 500;
    LOG.info("Running testSimpleWrite, numRequests=" + numRequests);
    // default 64K is too large for a test
    GrpcConfigKeys.OutputStream.setBufferSize(prop, SizeInBytes.valueOf(4));
    cluster = MiniRaftClusterWithGRpc.FACTORY.newCluster(NUM_SERVERS, prop);
    cluster.start();
    RaftServerImpl leader = waitForLeader(cluster);
    try (RaftOutputStream out = new RaftOutputStream(prop, ClientId.randomId(), cluster.getGroup(), leader.getId())) {
        for (int i = 0; i < numRequests; i++) {
            // generate requests
            out.write(toBytes(i));
        }
    }
    // check the leader's raft log
    final RaftLog raftLog = leader.getState().getLog();
    final AtomicInteger i = new AtomicInteger();
    checkLog(raftLog, numRequests, () -> toBytes(i.getAndIncrement()));
}

Example 3 with RaftLog

use of org.apache.ratis.server.storage.RaftLog in project incubator-ratis by apache.

the class RaftReconfigurationBaseTest method testRevertConfigurationChange.

/**
 * Test a scenario where the follower truncates its log entries which causes
 * configuration change.
 */
@Test
public void testRevertConfigurationChange() throws Exception {
    LOG.info("Start testRevertConfigurationChange");
    RaftLog log2 = null;
    final MiniRaftCluster cluster = getCluster(5);
    try {
        cluster.start();
        RaftTestUtil.waitForLeader(cluster);
        final RaftServerImpl leader = cluster.getLeader();
        final RaftPeerId leaderId = leader.getId();
        final RaftLog log = leader.getState().getLog();
        log2 = 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, there may be NOOP before and after it.
        final long confIndex = JavaUtils.attempt(() -> {
            final long last = log.getLastEntryTermIndex().getIndex();
            for (long i = 1; i <= last; i++) {
                if (log.get(i).getLogEntryBodyCase() == CONFIGURATIONENTRY) {
                    return i;
                }
            }
            throw new Exception("CONFIGURATIONENTRY not found: last=" + last);
        }, 10, 500, "confIndex", LOG);
        // wait till the old leader persist the new conf
        JavaUtils.attempt(() -> log.getLatestFlushedIndex() >= confIndex, 10, 500L, "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.attempt(() -> log.getLastCommittedIndex() >= confIndex, 10, 500L, "COMMIT", LOG);
        Assert.assertEquals(NOOP, log.get(confIndex).getLogEntryBodyCase());
        log2 = null;
    } finally {
        RaftStorageTestUtils.printLog(log2, s -> LOG.info(s));
        cluster.shutdown();
    }
}

Example 4 with RaftLog

use of org.apache.ratis.server.storage.RaftLog in project incubator-ratis by apache.

the class RaftReconfigurationBaseTest method testBootstrapReconf.

@Test
public void testBootstrapReconf() throws Exception {
    LOG.info("Start testBootstrapReconf");
    // originally 3 peers
    final MiniRaftCluster cluster = getCluster(3);
    cluster.start();
    try {
        RaftTestUtil.waitForLeader(cluster);
        final RaftPeerId leaderId = cluster.getLeader().getId();
        final RaftClient client = cluster.createClient(leaderId);
        // submit some msgs before reconf
        for (int i = 0; i < getStagingGap() * 2; i++) {
            RaftClientReply reply = client.send(new SimpleMessage("m" + i));
            Assert.assertTrue(reply.isSuccess());
        }
        PeerChanges c1 = cluster.addNewPeers(2, true);
        LOG.info("Start changing the configuration: {}", asList(c1.allPeersInNewConf));
        final AtomicReference<Boolean> success = new AtomicReference<>();
        Thread clientThread = new Thread(() -> {
            try {
                RaftClientReply reply = client.setConfiguration(c1.allPeersInNewConf);
                success.set(reply.isSuccess());
                client.close();
            } catch (IOException ioe) {
                LOG.error("FAILED", ioe);
            }
        });
        clientThread.start();
        Thread.sleep(5000);
        LOG.info(cluster.printServers());
        assertSuccess(success);
        final RaftLog leaderLog = cluster.getLeader().getState().getLog();
        for (RaftPeer newPeer : c1.newPeers) {
            Assert.assertArrayEquals(leaderLog.getEntries(0, Long.MAX_VALUE), cluster.getServer(newPeer.getId()).getImpl().getState().getLog().getEntries(0, Long.MAX_VALUE));
        }
    } finally {
        cluster.shutdown();
    }
}

Example 5 with RaftLog

use of org.apache.ratis.server.storage.RaftLog in project incubator-ratis by apache.

the class MiniRaftCluster method printAllLogs.

public String printAllLogs() {
    StringBuilder b = new StringBuilder("\n#servers = " + servers.size() + "\n");
    for (RaftServerImpl s : iterateServerImpls()) {
        b.append("  ");
        b.append(s).append("\n");
        final RaftLog log = s.getState().getLog();
        if (log instanceof MemoryRaftLog) {
            b.append("    ");
            b.append(((MemoryRaftLog) log).getEntryString());
        }
    }
    return b.toString();
}