Examples with QuorumPeer org.apache.zookeeper.server.quorum.QuorumPeer used on opensource projects

Example 46 with QuorumPeer

use of org.apache.zookeeper.server.quorum.QuorumPeer in project zookeeper by apache.

the class NonRecoverableErrorTest method testZooKeeperServiceAvailableOnLeader.

/**
 * Test case for https://issues.apache.org/jira/browse/ZOOKEEPER-2247.
 * Test to verify that even after non recoverable error (error while
 * writing transaction log), ZooKeeper is still available.
 */
@Test
@Timeout(value = 30)
public void testZooKeeperServiceAvailableOnLeader() throws Exception {
    int SERVER_COUNT = 3;
    final int[] clientPorts = new int[SERVER_COUNT];
    StringBuilder sb = new StringBuilder();
    String server;
    for (int i = 0; i < SERVER_COUNT; i++) {
        clientPorts[i] = PortAssignment.unique();
        server = "server." + i + "=127.0.0.1:" + PortAssignment.unique() + ":" + PortAssignment.unique() + ":participant;127.0.0.1:" + clientPorts[i];
        sb.append(server + "\n");
    }
    String currentQuorumCfgSection = sb.toString();
    MainThread[] mt = new MainThread[SERVER_COUNT];
    for (int i = 0; i < SERVER_COUNT; i++) {
        mt[i] = new MainThread(i, clientPorts[i], currentQuorumCfgSection, false);
        mt[i].start();
    }
    // ensure server started
    for (int i = 0; i < SERVER_COUNT; i++) {
        assertTrue(ClientBase.waitForServerUp("127.0.0.1:" + clientPorts[i], CONNECTION_TIMEOUT), "waiting for server " + i + " being up");
    }
    CountdownWatcher watcher = new CountdownWatcher();
    ZooKeeper zk = new ZooKeeper("127.0.0.1:" + clientPorts[0], ClientBase.CONNECTION_TIMEOUT, watcher);
    watcher.waitForConnected(ClientBase.CONNECTION_TIMEOUT);
    String data = "originalData";
    zk.create(NODE_PATH, data.getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
    // get information of current leader
    QuorumPeer leader = getLeaderQuorumPeer(mt);
    assertNotNull(leader, "Leader must have been elected by now");
    // inject problem in leader
    FileTxnSnapLog snapLog = leader.getActiveServer().getTxnLogFactory();
    FileTxnSnapLog fileTxnSnapLogWithError = new FileTxnSnapLog(snapLog.getDataDir(), snapLog.getSnapDir()) {

        @Override
        public void commit() throws IOException {
            throw new IOException("Input/output error");
        }
    };
    ZKDatabase originalZKDatabase = leader.getActiveServer().getZKDatabase();
    long leaderCurrentEpoch = leader.getCurrentEpoch();
    ZKDatabase newDB = new ZKDatabase(fileTxnSnapLogWithError);
    leader.getActiveServer().setZKDatabase(newDB);
    try {
        // do create operation, so that injected IOException is thrown
        zk.create(uniqueZnode(), data.getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
        fail("IOException is expected due to error injected to transaction log commit");
    } catch (Exception e) {
    // do nothing
    }
    // resetting watcher so that this watcher can be again used to ensure
    // that the zkClient is able to re-establish connection with the
    // newly elected zookeeper quorum.
    watcher.reset();
    waitForNewLeaderElection(leader, leaderCurrentEpoch);
    // takes place
    for (int i = 0; i < SERVER_COUNT; i++) {
        assertTrue(ClientBase.waitForServerUp("127.0.0.1:" + clientPorts[i], CONNECTION_TIMEOUT), "waiting for server " + i + " being up");
    }
    // revert back the error
    leader.getActiveServer().setZKDatabase(originalZKDatabase);
    // verify that now ZooKeeper service is up and running
    leader = getLeaderQuorumPeer(mt);
    assertNotNull(leader, "New leader must have been elected by now");
    String uniqueNode = uniqueZnode();
    watcher.waitForConnected(ClientBase.CONNECTION_TIMEOUT);
    String createNode = zk.create(uniqueNode, data.getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
    // if node is created successfully then it means that ZooKeeper service
    // is available
    assertEquals(uniqueNode, createNode, "Failed to create znode");
    zk.close();
    // stop all severs
    for (int i = 0; i < SERVER_COUNT; i++) {
        mt[i].shutdown();
    }
}

Example 47 with QuorumPeer

use of org.apache.zookeeper.server.quorum.QuorumPeer in project zookeeper by apache.

the class QuorumUtil method start.

public void start(int id) throws IOException {
    PeerStruct ps = getPeer(id);
    LOG.info("Creating QuorumPeer {}; public port {}", ps.id, ps.clientPort);
    ps.peer = new QuorumPeer(peersView, ps.dataDir, ps.dataDir, ps.clientPort, electionAlg, ps.id, tickTime, initLimit, syncLimit, connectToLearnerMasterLimit);
    if (localSessionEnabled) {
        ps.peer.enableLocalSessions(true);
    }
    assertEquals(ps.clientPort, ps.peer.getClientPort());
    ps.peer.start();
}

Example 48 with QuorumPeer

use of org.apache.zookeeper.server.quorum.QuorumPeer in project zookeeper by apache.

the class ObserverLETest method testLEWithObserver.

/**
 * See ZOOKEEPER-1294. Confirms that an observer will not support the quorum
 * of a leader by forming a 5-node, 2-observer ensemble (so quorum size is 2).
 * When all but the leader and one observer are shut down, the leader should
 * enter the 'looking' state, not stay in the 'leading' state.
 */
@Test
public void testLEWithObserver() throws Exception {
    QuorumPeer leader = null;
    for (QuorumPeer server : Arrays.asList(qb.s1, qb.s2, qb.s3)) {
        if (server.getServerState().equals(QuorumStats.Provider.FOLLOWING_STATE)) {
            server.shutdown();
            assertTrue(ClientBase.waitForServerDown("127.0.0.1:" + server.getClientPort(), ClientBase.CONNECTION_TIMEOUT), "Waiting for server down");
        } else {
            assertNull(leader, "More than one leader found");
            leader = server;
        }
    }
    assertTrue(ClientBase.waitForServerState(leader, ClientBase.CONNECTION_TIMEOUT, QuorumStats.Provider.LOOKING_STATE), "Leader is not in Looking state");
}

Example 49 with QuorumPeer

use of org.apache.zookeeper.server.quorum.QuorumPeer in project coprhd-controller by CoprHD.

the class CoordinatorImpl method runFromConfig.

// Start Zookeeper peer in cluster mode
private void runFromConfig(SpringQuorumPeerConfig config) throws Exception {
    _log.info(String.format("Starting quorum peer from config for %d", config.getServerId()));
    ServerCnxnFactory cnxnFactory = ServerCnxnFactory.createFactory();
    cnxnFactory.configure(config.getClientPortAddress(), config.getMaxClientCnxns());
    QuorumPeer quorumPeer = new QuorumPeer();
    quorumPeer.setClientPortAddress(config.getClientPortAddress());
    quorumPeer.setTxnFactory(new FileTxnSnapLog(new File(config.getDataLogDir()), new File(config.getDataDir())));
    quorumPeer.setQuorumPeers(config.getServers());
    quorumPeer.setElectionType(config.getElectionAlg());
    quorumPeer.setMyid(config.getServerId());
    quorumPeer.setTickTime(config.getTickTime());
    quorumPeer.setMinSessionTimeout(config.getMinSessionTimeout());
    quorumPeer.setMaxSessionTimeout(config.getMaxSessionTimeout());
    quorumPeer.setInitLimit(config.getInitLimit());
    quorumPeer.setSyncLimit(config.getSyncLimit());
    quorumPeer.setQuorumVerifier(config.getQuorumVerifier());
    quorumPeer.setCnxnFactory(cnxnFactory);
    quorumPeer.setZKDatabase(new ZKDatabase(quorumPeer.getTxnFactory()));
    quorumPeer.setLearnerType(config.getPeerType());
    quorumPeer.setSyncEnabled(config.getSyncEnabled());
    quorumPeer.setQuorumListenOnAllIPs(config.getQuorumListenOnAllIPs());
    quorumPeer.start();
}

Example 50 with QuorumPeer

use of org.apache.zookeeper.server.quorum.QuorumPeer in project ecf by eclipse.

the class ZooDiscoveryContainer method startQuorumPeer.

/**
 * Start a local ZooKeeer server to write nodes to. It plays as a peer
 * within a replicated servers configuration. Implied by
 * {@link IDiscoveryConfig#ZOODISCOVERY_FLAVOR_REPLICATED} configuration.
 *
 * @param conf
 */
void startQuorumPeer(final Configuration conf) {
    if (this.quorumPeer != null && this.quorumPeer.isAlive()) {
        return;
    } else if (this.quorumPeer != null && !this.quorumPeer.isAlive()) {
        this.quorumPeer.start();
        return;
    }
    try {
        final QuorumPeerConfig quorumPeerConfig = new QuorumPeerConfig();
        quorumPeerConfig.parse(conf.getConfFile());
        QuorumPeer.Factory qpFactory = new QuorumPeer.Factory() {

            public QuorumPeer create(NIOServerCnxn.Factory cnxnFactory) throws IOException {
                ServerConfig serverConfig = new ServerConfig();
                serverConfig.readFrom(quorumPeerConfig);
                QuorumPeer peer = new QuorumPeer(quorumPeerConfig.getServers(), new File(serverConfig.getDataDir()), new File(serverConfig.getDataLogDir()), quorumPeerConfig.getElectionAlg(), quorumPeerConfig.getServerId(), quorumPeerConfig.getTickTime(), quorumPeerConfig.getInitLimit(), quorumPeerConfig.getSyncLimit(), cnxnFactory, quorumPeerConfig.getQuorumVerifier());
                ZooDiscoveryContainer.this.quorumPeer = peer;
                return peer;
            }

            public NIOServerCnxn.Factory createConnectionFactory() throws IOException {
                return new NIOServerCnxn.Factory(quorumPeerConfig.getClientPortAddress());
            }
        };
        quorumPeer = qpFactory.create(qpFactory.createConnectionFactory());
        quorumPeer.start();
        quorumPeer.setDaemon(true);
        isQuorumPeerReady = true;
    } catch (Exception e) {
        // $NON-NLS-1$
        Logger.log(LogService.LOG_ERROR, "Zookeeper quorum cannot be started! ", e);
        isQuorumPeerReady = false;
    }
}