Examples with ZooKeeper org.apache.zookeeper.ZooKeeper used on opensource projects

Example 41 with ZooKeeper

use of org.apache.zookeeper.ZooKeeper in project zookeeper by apache.

the class LeaderSessionTrackerTest method testCreateEphemeral.

/**
     * When we create ephemeral node, we need to check against global
     * session, so the leader never accept request from an expired session
     * (that we no longer track)
     *
     * This is not the same as SessionInvalidationTest since session
     * is not in closing state
     */
public void testCreateEphemeral(boolean localSessionEnabled) throws Exception {
    if (localSessionEnabled) {
        qu.enableLocalSession(true);
    }
    qu.startAll();
    QuorumPeer leader = qu.getLeaderQuorumPeer();
    ZooKeeper zk = ClientBase.createZKClient(qu.getConnectString(leader));
    CreateRequest createRequest = new CreateRequest("/impossible", new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL.toFlag());
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    BinaryOutputArchive boa = BinaryOutputArchive.getArchive(baos);
    createRequest.serialize(boa, "request");
    ByteBuffer bb = ByteBuffer.wrap(baos.toByteArray());
    // Mimic sessionId generated by follower's local session tracker
    long sid = qu.getFollowerQuorumPeers().get(0).getActiveServer().getServerId();
    long fakeSessionId = (sid << 56) + 1;
    LOG.info("Fake session Id: " + Long.toHexString(fakeSessionId));
    Request request = new Request(null, fakeSessionId, 0, OpCode.create, bb, new ArrayList<Id>());
    // Submit request directly to leader
    leader.getActiveServer().submitRequest(request);
    // Make sure that previous request is finished
    zk.create("/ok", new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
    Stat stat = zk.exists("/impossible", null);
    Assert.assertEquals("Node from fake session get created", null, stat);
}

Example 42 with ZooKeeper

use of org.apache.zookeeper.ZooKeeper in project zookeeper by apache.

the class LeaderSessionTrackerTest method testCreatePersistent.

/**
     * When local session is enabled, leader will allow persistent node
     * to be create for unknown session
     */
@Test
public void testCreatePersistent() throws Exception {
    qu.enableLocalSession(true);
    qu.startAll();
    QuorumPeer leader = qu.getLeaderQuorumPeer();
    ZooKeeper zk = ClientBase.createZKClient(qu.getConnectString(leader));
    CreateRequest createRequest = new CreateRequest("/success", new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT.toFlag());
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    BinaryOutputArchive boa = BinaryOutputArchive.getArchive(baos);
    createRequest.serialize(boa, "request");
    ByteBuffer bb = ByteBuffer.wrap(baos.toByteArray());
    // Mimic sessionId generated by follower's local session tracker
    long sid = qu.getFollowerQuorumPeers().get(0).getActiveServer().getServerId();
    long locallSession = (sid << 56) + 1;
    LOG.info("Local session Id: " + Long.toHexString(locallSession));
    Request request = new Request(null, locallSession, 0, OpCode.create, bb, new ArrayList<Id>());
    // Submit request directly to leader
    leader.getActiveServer().submitRequest(request);
    // Make sure that previous request is finished
    zk.create("/ok", new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
    Stat stat = zk.exists("/success", null);
    Assert.assertTrue("Request from local sesson failed", stat != null);
}

Example 43 with ZooKeeper

use of org.apache.zookeeper.ZooKeeper in project zookeeper by apache.

the class LoadFromLogTest method testRestoreWithTransactionErrors.

/**
     * Test we can restore a snapshot that has errors and data ahead of the zxid
     * of the snapshot file.
     */
@Test
public void testRestoreWithTransactionErrors() throws Exception {
    final String hostPort = HOST + PortAssignment.unique();
    // setup a single server cluster
    File tmpDir = ClientBase.createTmpDir();
    ClientBase.setupTestEnv();
    ZooKeeperServer zks = new ZooKeeperServer(tmpDir, tmpDir, 3000);
    SyncRequestProcessor.setSnapCount(10000);
    final int PORT = Integer.parseInt(hostPort.split(":")[1]);
    ServerCnxnFactory f = ServerCnxnFactory.createFactory(PORT, -1);
    f.startup(zks);
    Assert.assertTrue("waiting for server being up ", ClientBase.waitForServerUp(hostPort, CONNECTION_TIMEOUT));
    ZooKeeper zk = getConnectedZkClient(hostPort);
    // generate some transactions
    try {
        for (int i = 0; i < NUM_MESSAGES; i++) {
            try {
                zk.create("/invaliddir/test-", new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT_SEQUENTIAL);
            } catch (NoNodeException e) {
            //Expected
            }
        }
    } finally {
        zk.close();
    }
    // force the zxid to be behind the content
    zks.getZKDatabase().setlastProcessedZxid(zks.getZKDatabase().getDataTreeLastProcessedZxid() - 10);
    LOG.info("Set lastProcessedZxid to " + zks.getZKDatabase().getDataTreeLastProcessedZxid());
    // Force snapshot and restore
    zks.takeSnapshot();
    zks.shutdown();
    f.shutdown();
    zks = new ZooKeeperServer(tmpDir, tmpDir, 3000);
    SyncRequestProcessor.setSnapCount(10000);
    f = ServerCnxnFactory.createFactory(PORT, -1);
    f.startup(zks);
    Assert.assertTrue("waiting for server being up ", ClientBase.waitForServerUp(hostPort, CONNECTION_TIMEOUT));
    f.shutdown();
    zks.shutdown();
}

Example 44 with ZooKeeper

use of org.apache.zookeeper.ZooKeeper in project zookeeper by apache.

the class LoadFromLogTest method testLoad.

/**
     * test that all transactions from the Log are loaded, and only once
     * @throws Exception an exception might be thrown here
     */
@Test
public void testLoad() throws Exception {
    final String hostPort = HOST + PortAssignment.unique();
    // setup a single server cluster
    File tmpDir = ClientBase.createTmpDir();
    ClientBase.setupTestEnv();
    ZooKeeperServer zks = new ZooKeeperServer(tmpDir, tmpDir, 3000);
    SyncRequestProcessor.setSnapCount(100);
    final int PORT = Integer.parseInt(hostPort.split(":")[1]);
    ServerCnxnFactory f = ServerCnxnFactory.createFactory(PORT, -1);
    f.startup(zks);
    Assert.assertTrue("waiting for server being up ", ClientBase.waitForServerUp(hostPort, CONNECTION_TIMEOUT));
    ZooKeeper zk = ClientBase.createZKClient(hostPort);
    // generate some transactions that will get logged
    try {
        for (int i = 0; i < NUM_MESSAGES; i++) {
            zk.create("/invalidsnap-" + i, new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
        }
    } finally {
        zk.close();
    }
    f.shutdown();
    Assert.assertTrue("waiting for server to shutdown", ClientBase.waitForServerDown(hostPort, CONNECTION_TIMEOUT));
    // now verify that the FileTxnLog reads every transaction only once
    File logDir = new File(tmpDir, FileTxnSnapLog.version + FileTxnSnapLog.VERSION);
    FileTxnLog txnLog = new FileTxnLog(logDir);
    TxnIterator itr = txnLog.read(0);
    // Check that storage space return some value
    FileTxnIterator fileItr = (FileTxnIterator) itr;
    long storageSize = fileItr.getStorageSize();
    LOG.info("Txnlog size: " + storageSize + " bytes");
    Assert.assertTrue("Storage size is greater than zero ", (storageSize > 0));
    long expectedZxid = 0;
    long lastZxid = 0;
    TxnHeader hdr;
    do {
        hdr = itr.getHeader();
        expectedZxid++;
        Assert.assertTrue("not the same transaction. lastZxid=" + lastZxid + ", zxid=" + hdr.getZxid(), lastZxid != hdr.getZxid());
        Assert.assertTrue("excepting next transaction. expected=" + expectedZxid + ", retreived=" + hdr.getZxid(), (hdr.getZxid() == expectedZxid));
        lastZxid = hdr.getZxid();
    } while (itr.next());
    Assert.assertTrue("processed all transactions. " + expectedZxid + " == " + TOTAL_TRANSACTIONS, (expectedZxid == TOTAL_TRANSACTIONS));
    zks.shutdown();
}

Example 45 with ZooKeeper

use of org.apache.zookeeper.ZooKeeper in project zookeeper by apache.

the class LoadFromLogTest method testLoadFailure.

/**
     * test that we fail to load txnlog of a request zxid that is older
     * than what exist on disk
     * @throws Exception an exception might be thrown here
     */
@Test
public void testLoadFailure() throws Exception {
    final String hostPort = HOST + PortAssignment.unique();
    // setup a single server cluster
    File tmpDir = ClientBase.createTmpDir();
    ClientBase.setupTestEnv();
    ZooKeeperServer zks = new ZooKeeperServer(tmpDir, tmpDir, 3000);
    // So we have at least 4 logs
    SyncRequestProcessor.setSnapCount(50);
    final int PORT = Integer.parseInt(hostPort.split(":")[1]);
    ServerCnxnFactory f = ServerCnxnFactory.createFactory(PORT, -1);
    f.startup(zks);
    Assert.assertTrue("waiting for server being up ", ClientBase.waitForServerUp(hostPort, CONNECTION_TIMEOUT));
    ZooKeeper zk = ClientBase.createZKClient(hostPort);
    // generate some transactions that will get logged
    try {
        for (int i = 0; i < NUM_MESSAGES; i++) {
            zk.create("/data-", new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT_SEQUENTIAL);
        }
    } finally {
        zk.close();
    }
    f.shutdown();
    Assert.assertTrue("waiting for server to shutdown", ClientBase.waitForServerDown(hostPort, CONNECTION_TIMEOUT));
    File logDir = new File(tmpDir, FileTxnSnapLog.version + FileTxnSnapLog.VERSION);
    File[] logFiles = FileTxnLog.getLogFiles(logDir.listFiles(), 0);
    // Verify that we have at least 4 txnlog
    Assert.assertTrue(logFiles.length > 4);
    // Delete the first log file, so we will fail to read it back from disk
    Assert.assertTrue("delete the first log file", logFiles[0].delete());
    // Find zxid for the second log
    long secondStartZxid = Util.getZxidFromName(logFiles[1].getName(), "log");
    FileTxnLog txnLog = new FileTxnLog(logDir);
    TxnIterator itr = txnLog.read(1, false);
    // Oldest log is already remove, so this should point to the start of
    // of zxid on the second log
    Assert.assertEquals(secondStartZxid, itr.getHeader().getZxid());
    itr = txnLog.read(secondStartZxid, false);
    Assert.assertEquals(secondStartZxid, itr.getHeader().getZxid());
    Assert.assertTrue(itr.next());
    // Trying to get a second txn on second txnlog give us the
    // the start of second log, since the first one is removed
    long nextZxid = itr.getHeader().getZxid();
    itr = txnLog.read(nextZxid, false);
    Assert.assertEquals(secondStartZxid, itr.getHeader().getZxid());
    // Trying to get a first txn on the third give us the
    // the start of second log, since the first one is removed
    long thirdStartZxid = Util.getZxidFromName(logFiles[2].getName(), "log");
    itr = txnLog.read(thirdStartZxid, false);
    Assert.assertEquals(secondStartZxid, itr.getHeader().getZxid());
    Assert.assertTrue(itr.next());
    nextZxid = itr.getHeader().getZxid();
    itr = txnLog.read(nextZxid, false);
    Assert.assertEquals(secondStartZxid, itr.getHeader().getZxid());
}