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

Example 6 with PeerChanges

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

the class RaftReconfigurationBaseTest method testKillLeaderDuringReconf.

/**
 * kill the leader before reconfiguration finishes. Make sure the client keeps
 * retrying.
 */
@Test
public void testKillLeaderDuringReconf() throws Exception {
    LOG.info("Start testKillLeaderDuringReconf");
    // 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);
        PeerChanges c1 = cluster.addNewPeers(2, false);
        PeerChanges c2 = cluster.removePeers(2, false, asList(c1.newPeers));
        LOG.info("Start changing the configuration: {}", asList(c2.allPeersInNewConf));
        final AtomicReference<Boolean> success = new AtomicReference<>();
        final AtomicBoolean clientRunning = new AtomicBoolean(true);
        Thread clientThread = new Thread(() -> {
            try {
                boolean r = false;
                while (clientRunning.get() && !r) {
                    r = client.setConfiguration(c2.allPeersInNewConf).isSuccess();
                }
                success.set(r);
                client.close();
            } catch (IOException ignored) {
            }
        });
        clientThread.start();
        // the leader cannot generate the (old, new) conf, and it will keep
        // bootstrapping the 2 new peers since they have not started yet
        LOG.info(cluster.printServers());
        Assert.assertFalse(cluster.getLeader().getRaftConf().isTransitional());
        // only the first empty entry got committed
        final long committedIndex = cluster.getLeader().getState().getLog().getLastCommittedIndex();
        Assert.assertTrue("committedIndex is " + committedIndex, committedIndex <= 1);
        LOG.info("kill the current leader");
        final String oldLeaderId = RaftTestUtil.waitAndKillLeader(cluster, true);
        LOG.info("start the two new peers: {}", Arrays.asList(c1.newPeers));
        for (RaftPeer np : c1.newPeers) {
            cluster.startServer(np.getId());
        }
        Thread.sleep(3000);
        // the client should get the NotLeaderException from the first leader, and
        // will retry the same setConfiguration request
        waitAndCheckNewConf(cluster, c2.allPeersInNewConf, 2, Collections.singletonList(oldLeaderId));
        clientRunning.set(false);
    // Assert.assertTrue(success.get());
    } finally {
        cluster.shutdown();
    }
}

Example 7 with PeerChanges

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

the class RaftReconfigurationBaseTest method testReconfTimeout.

@Test
public void testReconfTimeout() throws Exception {
    LOG.info("Start testReconfTimeout");
    // 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);
        PeerChanges c1 = cluster.addNewPeers(2, false);
        LOG.info("Start changing the configuration: {}", asList(c1.allPeersInNewConf));
        Assert.assertFalse(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.startServer(np.getId());
        }
        Assert.assertTrue(client.setConfiguration(c1.allPeersInNewConf).isSuccess());
        client.close();
    } finally {
        cluster.shutdown();
    }
}