Examples with DataLogNotAvailableException io.pravega.segmentstore.storage.DataLogNotAvailableException used on opensource projects

Example 1 with DataLogNotAvailableException

use of io.pravega.segmentstore.storage.DataLogNotAvailableException in project pravega by pravega.

the class BookKeeperLogTests method testAutoCloseOnBookieFailure.

/**
 * Tests the ability to auto-close upon a permanent write failure caused by BookKeeper.
 *
 * @throws Exception If one got thrown.
 */
@Test
public void testAutoCloseOnBookieFailure() throws Exception {
    try (DurableDataLog log = createDurableDataLog()) {
        log.initialize(TIMEOUT);
        try {
            // Suspend a bookie (this will trigger write errors).
            stopFirstBookie();
            // First write should fail. Either a DataLogNotAvailableException (insufficient bookies) or
            // WriteFailureException (general unable to write) should be thrown.
            AssertExtensions.assertSuppliedFutureThrows("First write did not fail with the appropriate exception.", () -> log.append(new CompositeByteArraySegment(getWriteData()), TIMEOUT), ex -> ex instanceof RetriesExhaustedException && (ex.getCause() instanceof DataLogNotAvailableException || isLedgerClosedException(ex.getCause())) || ex instanceof ObjectClosedException || ex instanceof CancellationException);
            // Subsequent writes should be rejected since the BookKeeperLog is now closed.
            AssertExtensions.assertSuppliedFutureThrows("Second write did not fail with the appropriate exception.", () -> log.append(new CompositeByteArraySegment(getWriteData()), TIMEOUT), ex -> ex instanceof ObjectClosedException || ex instanceof CancellationException);
        } finally {
            // Don't forget to resume the bookie.
            restartFirstBookie();
        }
    }
}

Example 2 with DataLogNotAvailableException

use of io.pravega.segmentstore.storage.DataLogNotAvailableException in project pravega by pravega.

the class DurableLogTests method testRecoveryFailures.

/**
 * Tests the DurableLog recovery process in a scenario when there are failures during the process
 * (these may or may not be DataCorruptionExceptions).
 */
@Test
public void testRecoveryFailures() throws Exception {
    int streamSegmentCount = 50;
    int appendsPerStreamSegment = 20;
    // Fail DataLog reads after X reads.
    int failReadAfter = 2;
    // Setup a DurableLog and start it.
    AtomicReference<TestDurableDataLog> dataLog = new AtomicReference<>();
    @Cleanup TestDurableDataLogFactory dataLogFactory = new TestDurableDataLogFactory(new InMemoryDurableDataLogFactory(MAX_DATA_LOG_APPEND_SIZE, executorService()), dataLog::set);
    @Cleanup Storage storage = InMemoryStorageFactory.newStorage(executorService());
    storage.initialize(1);
    Set<Long> streamSegmentIds;
    List<OperationWithCompletion> completionFutures;
    // First DurableLog. We use this for generating data.
    UpdateableContainerMetadata metadata = new MetadataBuilder(CONTAINER_ID).build();
    @Cleanup CacheStorage cacheStorage = new DirectMemoryCache(Integer.MAX_VALUE);
    @Cleanup CacheManager cacheManager = new CacheManager(CachePolicy.INFINITE, cacheStorage, executorService());
    try (ReadIndex readIndex = new ContainerReadIndex(DEFAULT_READ_INDEX_CONFIG, metadata, storage, cacheManager, executorService());
        DurableLog durableLog = new DurableLog(ContainerSetup.defaultDurableLogConfig(), metadata, dataLogFactory, readIndex, executorService())) {
        durableLog.startAsync().awaitRunning();
        // Generate some test data (we need to do this after we started the DurableLog because in the process of
        // recovery, it wipes away all existing metadata).
        streamSegmentIds = createStreamSegmentsWithOperations(streamSegmentCount, durableLog);
        List<Operation> operations = generateOperations(streamSegmentIds, new HashMap<>(), appendsPerStreamSegment, METADATA_CHECKPOINT_EVERY, false, false);
        // Process all generated operations and wait for them to complete
        completionFutures = processOperations(operations, durableLog);
        OperationWithCompletion.allOf(completionFutures).join();
        // Stop the processor.
        durableLog.stopAsync().awaitTerminated();
    }
    // Recovery failure due to DataLog Failures.
    metadata = new MetadataBuilder(CONTAINER_ID).build();
    dataLog.set(null);
    try (ReadIndex readIndex = new ContainerReadIndex(DEFAULT_READ_INDEX_CONFIG, metadata, storage, cacheManager, executorService());
        DurableLog durableLog = new DurableLog(ContainerSetup.defaultDurableLogConfig(), metadata, dataLogFactory, readIndex, executorService())) {
        // Inject some artificial error into the DataLogRead after a few reads.
        ErrorInjector<Exception> readNextInjector = new ErrorInjector<>(count -> count > failReadAfter, () -> new DataLogNotAvailableException("intentional"));
        dataLog.get().setReadErrorInjectors(null, readNextInjector);
        // Verify the exception thrown from startAsync() is of the right kind. This exception will be wrapped in
        // multiple layers, so we need to dig deep into it.
        AssertExtensions.assertThrows("Recovery did not fail properly when expecting DurableDataLogException.", () -> durableLog.startAsync().awaitRunning(), ex -> {
            if (ex instanceof IllegalStateException) {
                ex = ex.getCause();
            }
            if (ex == null) {
                try {
                    // We need this to enter a FAILED state to get its failure cause.
                    durableLog.awaitTerminated();
                } catch (Exception ex2) {
                    ex = durableLog.failureCause();
                }
            }
            ex = Exceptions.unwrap(ex);
            return ex instanceof DataLogNotAvailableException && ex.getMessage().equals("intentional");
        });
    }
    // Recovery failure due to DataCorruptionException.
    metadata = new MetadataBuilder(CONTAINER_ID).build();
    dataLog.set(null);
    try (ReadIndex readIndex = new ContainerReadIndex(DEFAULT_READ_INDEX_CONFIG, metadata, storage, cacheManager, executorService());
        DurableLog durableLog = new DurableLog(ContainerSetup.defaultDurableLogConfig(), metadata, dataLogFactory, readIndex, executorService())) {
        // Reset error injectors to nothing.
        dataLog.get().setReadErrorInjectors(null, null);
        AtomicInteger readCounter = new AtomicInteger();
        dataLog.get().setReadInterceptor(readItem -> {
            if (readCounter.incrementAndGet() > failReadAfter && readItem.getLength() > DataFrame.MIN_ENTRY_LENGTH_NEEDED) {
                // Mangle with the payload and overwrite its contents with a DataFrame having a bogus
                // previous sequence number.
                DataFrame df = DataFrame.ofSize(readItem.getLength());
                df.seal();
                CompositeArrayView serialization = df.getData();
                return new InjectedReadItem(serialization.getReader(), serialization.getLength(), readItem.getAddress());
            }
            return readItem;
        });
        // Verify the exception thrown from startAsync() is of the right kind. This exception will be wrapped in
        // multiple layers, so we need to dig deep into it.
        AssertExtensions.assertThrows("Recovery did not fail properly when expecting DataCorruptionException.", () -> durableLog.startAsync().awaitRunning(), ex -> {
            if (ex instanceof IllegalStateException) {
                ex = ex.getCause();
            }
            return Exceptions.unwrap(ex) instanceof DataCorruptionException;
        });
        // Verify that the underlying DurableDataLog has been disabled.
        val disabledDataLog = dataLogFactory.createDurableDataLog(CONTAINER_ID);
        AssertExtensions.assertThrows("DurableDataLog has not been disabled following a recovery failure with DataCorruptionException.", () -> disabledDataLog.initialize(TIMEOUT), ex -> ex instanceof DataLogDisabledException);
    }
}

Example 3 with DataLogNotAvailableException

use of io.pravega.segmentstore.storage.DataLogNotAvailableException in project pravega by pravega.

the class DataFrameReaderTests method testReadsWithDataLogFailure.

/**
 * Tests the case when the DataFrameReader reads from a log and it encounters log read failures.
 * 1. Initial read failures.
 * 2. Somewhere in the middle of reading.
 */
@Test
public void testReadsWithDataLogFailure() throws Exception {
    // Fail reads synchronously every X attempts.
    int failReadSyncEvery = 3;
    ArrayList<TestLogItem> records = DataFrameTestHelpers.generateLogItems(100, SMALL_RECORD_MIN_SIZE, SMALL_RECORD_MAX_SIZE, 0);
    records.addAll(DataFrameTestHelpers.generateLogItems(100, LARGE_RECORD_MIN_SIZE, LARGE_RECORD_MAX_SIZE, records.size()));
    try (TestDurableDataLog dataLog = TestDurableDataLog.create(CONTAINER_ID, FRAME_SIZE, executorService())) {
        dataLog.initialize(TIMEOUT);
        BiConsumer<Throwable, DataFrameBuilder.CommitArgs> errorCallback = (ex, a) -> Assert.fail(String.format("Unexpected error occurred upon commit. %s", ex));
        val args = new DataFrameBuilder.Args(Callbacks::doNothing, Callbacks::doNothing, errorCallback, executorService());
        try (DataFrameBuilder<TestLogItem> b = new DataFrameBuilder<>(dataLog, SERIALIZER, args)) {
            for (TestLogItem r : records) {
                b.append(r);
            }
        }
        TestSerializer logItemFactory = new TestSerializer();
        // Test 1: Initial call to getReader.
        ErrorInjector<Exception> getReaderErrorInjector = new ErrorInjector<>(// Fail every time.
        count -> true, () -> new DataLogNotAvailableException("intentional getReader exception"));
        dataLog.setReadErrorInjectors(getReaderErrorInjector, null);
        AssertExtensions.assertThrows("No exception or wrong type of exception thrown by getNext() with exception thrown by getReader().", () -> new DataFrameReader<>(dataLog, logItemFactory, CONTAINER_ID), ex -> Exceptions.unwrap(ex) == getReaderErrorInjector.getLastCycleException());
        // Test 2: Failures during getNext().
        ErrorInjector<Exception> readErrorInjector = new ErrorInjector<>(count -> count % failReadSyncEvery == 0, () -> new DataLogNotAvailableException("intentional getNext exception"));
        dataLog.setReadErrorInjectors(null, readErrorInjector);
        testReadWithException(dataLog, logItemFactory, ex -> ex == readErrorInjector.getLastCycleException());
    }
}

Example 4 with DataLogNotAvailableException

use of io.pravega.segmentstore.storage.DataLogNotAvailableException in project pravega by pravega.

the class BookKeeperLog method handleWriteException.

/**
 * Handles an exception after a Write operation, converts it to a Pravega Exception and completes the given future
 * exceptionally using it.
 *
 * @param ex The exception from BookKeeper client.
 * @param write The Write that failed.
 */
@VisibleForTesting
static void handleWriteException(Throwable ex, Write write, BookKeeperLog bookKeeperLog) {
    try {
        int code = Code.UnexpectedConditionException;
        if (ex instanceof BKException) {
            BKException bKException = (BKException) ex;
            code = bKException.getCode();
        }
        switch(code) {
            case Code.LedgerFencedException:
                // We were fenced out.
                ex = new DataLogWriterNotPrimaryException("BookKeeperLog is not primary anymore.", ex);
                break;
            case Code.NotEnoughBookiesException:
                // Insufficient Bookies to complete the operation. This is a retryable exception.
                ex = new DataLogNotAvailableException("BookKeeperLog is not available.", ex);
                break;
            case Code.LedgerClosedException:
                // LedgerClosed can happen because we just rolled over the ledgers or because BookKeeper closed a ledger
                // due to some error. In either case, this is a retryable exception.
                ex = new WriteFailureException("Active Ledger is closed.", ex);
                break;
            case Code.WriteException:
                // Write-related failure or current Ledger closed. This is a retryable exception.
                ex = new WriteFailureException("Unable to write to active Ledger.", ex);
                break;
            case Code.ClientClosedException:
                // The BookKeeper client was closed externally. We cannot restart it here. We should close.
                ex = new ObjectClosedException(bookKeeperLog, ex);
                break;
            default:
                // All the other kind of exceptions go in the same bucket.
                ex = new DurableDataLogException("General exception while accessing BookKeeper.", ex);
        }
    } finally {
        write.fail(ex, !isRetryable(ex));
    }
}

Example 5 with DataLogNotAvailableException

use of io.pravega.segmentstore.storage.DataLogNotAvailableException in project pravega by pravega.

the class BookKeeperLogTests method testFactoryInitialize.

/**
 * Tests the BookKeeperLogFactory and its initialization.
 */
@Test
public void testFactoryInitialize() {
    BookKeeperConfig bkConfig = BookKeeperConfig.builder().with(BookKeeperConfig.ZK_ADDRESS, "127.0.0.1:" + TestUtils.getAvailableListenPort()).with(BookKeeperConfig.BK_LEDGER_MAX_SIZE, // Very frequent rollovers.
    WRITE_MAX_LENGTH * 10).with(BookKeeperConfig.ZK_METADATA_PATH, this.zkClient.get().getNamespace()).build();
    @Cleanup val factory = new BookKeeperLogFactory(bkConfig, this.zkClient.get(), executorService());
    AssertExtensions.assertThrows("", factory::initialize, ex -> ex instanceof DataLogNotAvailableException && ex.getCause() != null);
}