Examples with CompositeArrayView io.pravega.common.util.CompositeArrayView used on opensource projects

Example 1 with CompositeArrayView

use of io.pravega.common.util.CompositeArrayView 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 2 with CompositeArrayView

use of io.pravega.common.util.CompositeArrayView in project pravega by pravega.

the class InMemoryDurableDataLog method append.

@Override
public CompletableFuture<LogAddress> append(CompositeArrayView data, Duration timeout) {
    ensurePreconditions();
    if (data.getLength() > getWriteSettings().getMaxWriteLength()) {
        return Futures.failedFuture(new WriteTooLongException(data.getLength(), getWriteSettings().getMaxWriteLength()));
    }
    CompletableFuture<LogAddress> result;
    try {
        Entry entry = new Entry(data);
        synchronized (this.entries) {
            entry.sequenceNumber = this.offset;
            this.entries.add(entry, clientId);
            // Only update internals after a successful add.
            this.offset += entry.data.length;
        }
        result = CompletableFuture.completedFuture(new InMemoryLogAddress(entry.sequenceNumber));
    } catch (Throwable ex) {
        return Futures.failedFuture(ex);
    }
    Duration delay = this.appendDelayProvider.get();
    if (delay.compareTo(Duration.ZERO) <= 0) {
        // No delay, execute right away.
        return result;
    } else {
        // Schedule the append after the given delay.
        return result.thenComposeAsync(logAddress -> Futures.delayedFuture(delay, this.executorService).thenApply(ignored -> logAddress), this.executorService);
    }
}