Examples with ZKException com.twitter.distributedlog.exceptions.ZKException used on opensource projects

Example 6 with ZKException

use of com.twitter.distributedlog.exceptions.ZKException in project distributedlog by twitter.

the class TestLedgerAllocator method testSuccessAllocatorShouldDeleteUnusedledger.

@Test(timeout = 60000)
public void testSuccessAllocatorShouldDeleteUnusedledger() throws Exception {
    String allocationPath = "/allocation-delete-unused-ledger";
    zkc.get().create(allocationPath, new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
    Stat stat = new Stat();
    byte[] data = zkc.get().getData(allocationPath, false, stat);
    Versioned<byte[]> allocationData = new Versioned<byte[]>(data, new ZkVersion(stat.getVersion()));
    SimpleLedgerAllocator allocator1 = new SimpleLedgerAllocator(allocationPath, allocationData, newQuorumConfigProvider(dlConf), zkc, bkc);
    allocator1.allocate();
    // wait until allocated
    ZKTransaction txn1 = newTxn();
    LedgerHandle lh1 = FutureUtils.result(allocator1.tryObtain(txn1, NULL_LISTENER));
    // Second allocator kicks in
    stat = new Stat();
    data = zkc.get().getData(allocationPath, false, stat);
    allocationData = new Versioned<byte[]>(data, new ZkVersion(stat.getVersion()));
    SimpleLedgerAllocator allocator2 = new SimpleLedgerAllocator(allocationPath, allocationData, newQuorumConfigProvider(dlConf), zkc, bkc);
    allocator2.allocate();
    // wait until allocated
    ZKTransaction txn2 = newTxn();
    LedgerHandle lh2 = FutureUtils.result(allocator2.tryObtain(txn2, NULL_LISTENER));
    // should fail to commit txn1 as version is changed by second allocator
    try {
        FutureUtils.result(txn1.execute());
        fail("Should fail commit obtaining ledger handle from first allocator as allocator is modified by second allocator.");
    } catch (ZKException ke) {
    // as expected
    }
    FutureUtils.result(txn2.execute());
    Utils.close(allocator1);
    Utils.close(allocator2);
    // ledger handle should be deleted
    try {
        lh1.close();
        fail("LedgerHandle allocated by allocator1 should be deleted.");
    } catch (BKException bke) {
    // as expected
    }
    try {
        bkc.get().openLedger(lh1.getId(), BookKeeper.DigestType.CRC32, dlConf.getBKDigestPW().getBytes());
        fail("LedgerHandle allocated by allocator1 should be deleted.");
    } catch (BKException.BKNoSuchLedgerExistsException nslee) {
    // as expected
    }
    long eid = lh2.addEntry("hello world".getBytes());
    lh2.close();
    LedgerHandle readLh = bkc.get().openLedger(lh2.getId(), BookKeeper.DigestType.CRC32, dlConf.getBKDigestPW().getBytes());
    Enumeration<LedgerEntry> entries = readLh.readEntries(eid, eid);
    int i = 0;
    while (entries.hasMoreElements()) {
        LedgerEntry entry = entries.nextElement();
        assertEquals("hello world", new String(entry.getEntry(), UTF_8));
        ++i;
    }
    assertEquals(1, i);
}

Example 7 with ZKException

use of com.twitter.distributedlog.exceptions.ZKException in project distributedlog by twitter.

the class TestZKLogSegmentMetadataStore method testStoreMaxTxnIdBadVersion.

@Test(timeout = 60000)
public void testStoreMaxTxnIdBadVersion() throws Exception {
    Transaction<Object> updateTxn = lsmStore.transaction();
    Versioned<Long> value = new Versioned<Long>(999L, new ZkVersion(10));
    final Promise<Version> result = new Promise<Version>();
    lsmStore.storeMaxTxnId(updateTxn, rootZkPath, value, new Transaction.OpListener<Version>() {

        @Override
        public void onCommit(Version r) {
            result.setValue(r);
        }

        @Override
        public void onAbort(Throwable t) {
            result.setException(t);
        }
    });
    try {
        FutureUtils.result(updateTxn.execute());
        fail("Should fail on storing log record transaction id if providing bad version");
    } catch (ZKException zke) {
        assertEquals(KeeperException.Code.BADVERSION, zke.getKeeperExceptionCode());
    }
    try {
        Await.result(result);
        fail("Should fail on storing log record transaction id if providing bad version");
    } catch (KeeperException ke) {
        assertEquals(KeeperException.Code.BADVERSION, ke.code());
    }
    Stat stat = new Stat();
    byte[] data = zkc.get().getData(rootZkPath, false, stat);
    assertEquals(0, stat.getVersion());
    assertEquals(0, data.length);
}

Example 8 with ZKException

use of com.twitter.distributedlog.exceptions.ZKException in project distributedlog by twitter.

the class TestZKLogSegmentMetadataStore method testStoreMaxLogSegmentSequenceNumberOnNonExistentPath.

@Test(timeout = 60000)
public void testStoreMaxLogSegmentSequenceNumberOnNonExistentPath() throws Exception {
    Transaction<Object> updateTxn = lsmStore.transaction();
    Versioned<Long> value = new Versioned<Long>(999L, new ZkVersion(10));
    final Promise<Version> result = new Promise<Version>();
    String nonExistentPath = rootZkPath + "/non-existent";
    lsmStore.storeMaxLogSegmentSequenceNumber(updateTxn, nonExistentPath, value, new Transaction.OpListener<Version>() {

        @Override
        public void onCommit(Version r) {
            result.setValue(r);
        }

        @Override
        public void onAbort(Throwable t) {
            result.setException(t);
        }
    });
    try {
        FutureUtils.result(updateTxn.execute());
        fail("Should fail on storing log segment sequence number if path doesn't exist");
    } catch (ZKException zke) {
        assertEquals(KeeperException.Code.NONODE, zke.getKeeperExceptionCode());
    }
    try {
        Await.result(result);
        fail("Should fail on storing log segment sequence number if path doesn't exist");
    } catch (KeeperException ke) {
        assertEquals(KeeperException.Code.NONODE, ke.code());
    }
}

Example 9 with ZKException

use of com.twitter.distributedlog.exceptions.ZKException in project distributedlog by twitter.

the class BookKeeperClient method initialize.

private synchronized void initialize() throws IOException {
    if (null != this.bkc) {
        return;
    }
    boolean registerExpirationHandler;
    if (null == this.zkc) {
        int zkSessionTimeout = conf.getBKClientZKSessionTimeoutMilliSeconds();
        RetryPolicy retryPolicy = null;
        if (conf.getBKClientZKNumRetries() > 0) {
            retryPolicy = new BoundExponentialBackoffRetryPolicy(conf.getBKClientZKRetryBackoffStartMillis(), conf.getBKClientZKRetryBackoffMaxMillis(), conf.getBKClientZKNumRetries());
        }
        Credentials credentials = Credentials.NONE;
        if (conf.getZkAclId() != null) {
            credentials = new DigestCredentials(conf.getZkAclId(), conf.getZkAclId());
        }
        this.zkc = new ZooKeeperClient(name + ":zk", zkSessionTimeout, 2 * zkSessionTimeout, zkServers, retryPolicy, statsLogger.scope("bkc_zkc"), conf.getZKClientNumberRetryThreads(), conf.getBKClientZKRequestRateLimit(), credentials);
    }
    registerExpirationHandler = conf.getBKClientZKNumRetries() <= 0;
    try {
        commonInitialization(conf, ledgersPath, channelFactory, statsLogger, requestTimer, registerExpirationHandler);
    } catch (InterruptedException e) {
        throw new DLInterruptedException("Interrupted on creating bookkeeper client " + name + " : ", e);
    } catch (KeeperException e) {
        throw new ZKException("Error on creating bookkeeper client " + name + " : ", e);
    }
    if (ownZK) {
        LOG.info("BookKeeper Client created {} with its own ZK Client : ledgersPath = {}, numRetries = {}, " + "sessionTimeout = {}, backoff = {}, maxBackoff = {}, dnsResolver = {}, registerExpirationHandler = {}", new Object[] { name, ledgersPath, conf.getBKClientZKNumRetries(), conf.getBKClientZKSessionTimeoutMilliSeconds(), conf.getBKClientZKRetryBackoffStartMillis(), conf.getBKClientZKRetryBackoffMaxMillis(), conf.getBkDNSResolverOverrides(), registerExpirationHandler });
    } else {
        LOG.info("BookKeeper Client created {} with shared zookeeper client : ledgersPath = {}, numRetries = {}, " + "sessionTimeout = {}, backoff = {}, maxBackoff = {}, dnsResolver = {}, registerExpirationHandler = {}", new Object[] { name, ledgersPath, conf.getZKNumRetries(), conf.getZKSessionTimeoutMilliseconds(), conf.getZKRetryBackoffStartMillis(), conf.getZKRetryBackoffMaxMillis(), conf.getBkDNSResolverOverrides(), registerExpirationHandler });
    }
}

Example 10 with ZKException

use of com.twitter.distributedlog.exceptions.ZKException in project distributedlog by twitter.

the class TestZKLogSegmentMetadataStore method testDeleteNonExistentLogSegment.

@Test(timeout = 60000)
public void testDeleteNonExistentLogSegment() throws Exception {
    LogSegmentMetadata segment = createLogSegment(1L);
    Transaction<Object> deleteTxn = lsmStore.transaction();
    lsmStore.deleteLogSegment(deleteTxn, segment);
    try {
        FutureUtils.result(deleteTxn.execute());
        fail("Should fail deletion if log segment doesn't exist");
    } catch (Throwable t) {
        assertTrue("Should throw NoNodeException if log segment doesn't exist", t instanceof ZKException);
        ZKException zke = (ZKException) t;
        assertEquals("Should throw NoNodeException if log segment doesn't exist", KeeperException.Code.NONODE, zke.getKeeperExceptionCode());
    }
}