Examples with LogFile org.neo4j.kernel.impl.transaction.log.files.LogFile used on opensource projects

Example 26 with LogFile

use of org.neo4j.kernel.impl.transaction.log.files.LogFile in project neo4j by neo4j.

the class LogVersionUpgradeCheckerIT method appendCheckpoint.

private void appendCheckpoint(byte logEntryVersion, boolean removeCheckpointFile) throws IOException {
    VersionAwareLogEntryReader logEntryReader = new VersionAwareLogEntryReader(StorageEngineFactory.defaultStorageEngine().commandReaderFactory());
    LogFiles logFiles = LogFilesBuilder.activeFilesBuilder(databaseLayout, fileSystem, pageCache).withLogEntryReader(logEntryReader).withStoreId(StoreId.UNKNOWN).build();
    if (removeCheckpointFile) {
        for (Path file : fileSystem.listFiles(logFiles.logFilesDirectory(), path -> path.getFileName().toString().startsWith(CHECKPOINT_FILE_PREFIX))) {
            fileSystem.deleteFile(file);
        }
    }
    try (Lifespan lifespan = new Lifespan(logFiles)) {
        LogFile logFile = logFiles.getLogFile();
        TransactionLogWriter transactionLogWriter = logFile.getTransactionLogWriter();
        var channel = transactionLogWriter.getChannel();
        LogPosition logPosition = transactionLogWriter.getCurrentPosition();
        // Fake record
        channel.put(logEntryVersion).put(LEGACY_CHECK_POINT).putLong(logPosition.getLogVersion()).putLong(logPosition.getByteOffset());
        logFile.flush();
    }
}

Example 27 with LogFile

use of org.neo4j.kernel.impl.transaction.log.files.LogFile in project neo4j by neo4j.

the class CorruptedLogsTruncator method truncateLogFiles.

private void truncateLogFiles(long recoveredTransactionLogVersion, long recoveredTransactionOffset, Optional<CheckpointInfo> corruptCheckpoint) throws IOException {
    LogFile transactionLogFile = logFiles.getLogFile();
    truncateFilesFromVersion(recoveredTransactionLogVersion, recoveredTransactionOffset, transactionLogFile.getHighestLogVersion(), transactionLogFile::getLogFileForVersion);
    if (corruptCheckpoint.isPresent()) {
        LogPosition checkpointPosition = corruptCheckpoint.get().getCheckpointEntryPosition();
        CheckpointFile checkpointFile = logFiles.getCheckpointFile();
        truncateFilesFromVersion(checkpointPosition.getLogVersion(), checkpointPosition.getByteOffset(), checkpointFile.getCurrentDetachedLogVersion(), checkpointFile::getDetachedCheckpointFileForVersion);
    }
}

Example 28 with LogFile

use of org.neo4j.kernel.impl.transaction.log.files.LogFile in project neo4j by neo4j.

the class CorruptedLogsTruncator method backupCorruptedContent.

private void backupCorruptedContent(long recoveredTransactionLogVersion, long recoveredTransactionOffset, Optional<CheckpointInfo> corruptCheckpoint) throws IOException {
    Path corruptedLogArchive = getArchiveFile(recoveredTransactionLogVersion, recoveredTransactionOffset);
    try (ZipOutputStream recoveryContent = new ZipOutputStream(fs.openAsOutputStream(corruptedLogArchive, false));
        var bufferScope = new HeapScopedBuffer(1, MebiByte, memoryTracker)) {
        LogFile transactionLogFile = logFiles.getLogFile();
        copyLogsContent(recoveredTransactionLogVersion, recoveredTransactionOffset, transactionLogFile.getHighestLogVersion(), recoveryContent, bufferScope, transactionLogFile::getLogFileForVersion);
        if (corruptCheckpoint.isPresent()) {
            LogPosition checkpointPosition = corruptCheckpoint.get().getCheckpointEntryPosition();
            CheckpointFile checkpointFile = logFiles.getCheckpointFile();
            copyLogsContent(checkpointPosition.getLogVersion(), checkpointPosition.getByteOffset(), checkpointFile.getCurrentDetachedLogVersion(), recoveryContent, bufferScope, checkpointFile::getDetachedCheckpointFileForVersion);
        }
    }
}

Example 29 with LogFile

use of org.neo4j.kernel.impl.transaction.log.files.LogFile in project neo4j by neo4j.

the class TransactionLogsRecoveryTest method shouldRecoverExistingData.

@Test
void shouldRecoverExistingData() throws Exception {
    LogFile logFile = logFiles.getLogFile();
    Path file = logFile.getLogFileForVersion(logVersion);
    writeSomeData(file, pair -> {
        LogEntryWriter writer = pair.first();
        Consumer<LogPositionMarker> consumer = pair.other();
        LogPositionMarker marker = new LogPositionMarker();
        // last committed tx
        int previousChecksum = BASE_TX_CHECKSUM;
        consumer.accept(marker);
        LogPosition lastCommittedTxPosition = marker.newPosition();
        writer.writeStartEntry(2L, 3L, previousChecksum, new byte[0]);
        lastCommittedTxStartEntry = new LogEntryStart(2L, 3L, previousChecksum, new byte[0], lastCommittedTxPosition);
        previousChecksum = writer.writeCommitEntry(4L, 5L);
        lastCommittedTxCommitEntry = new LogEntryCommit(4L, 5L, previousChecksum);
        // check point pointing to the previously committed transaction
        var checkpointFile = logFiles.getCheckpointFile();
        var checkpointAppender = checkpointFile.getCheckpointAppender();
        checkpointAppender.checkPoint(LogCheckPointEvent.NULL, lastCommittedTxPosition, Instant.now(), "test");
        // tx committed after checkpoint
        consumer.accept(marker);
        writer.writeStartEntry(6L, 4L, previousChecksum, new byte[0]);
        expectedStartEntry = new LogEntryStart(6L, 4L, previousChecksum, new byte[0], marker.newPosition());
        previousChecksum = writer.writeCommitEntry(5L, 7L);
        expectedCommitEntry = new LogEntryCommit(5L, 7L, previousChecksum);
        return true;
    });
    LifeSupport life = new LifeSupport();
    var recoveryRequired = new AtomicBoolean();
    var recoveredTransactions = new MutableInt();
    RecoveryMonitor monitor = new RecoveryMonitor() {

        @Override
        public void recoveryRequired(LogPosition recoveryPosition) {
            recoveryRequired.set(true);
        }

        @Override
        public void recoveryCompleted(int numberOfRecoveredTransactions, long recoveryTimeInMilliseconds) {
            recoveredTransactions.setValue(numberOfRecoveredTransactions);
        }
    };
    try {
        StorageEngine storageEngine = mock(StorageEngine.class);
        final LogEntryReader reader = logEntryReader();
        TransactionMetadataCache metadataCache = new TransactionMetadataCache();
        LogicalTransactionStore txStore = new PhysicalLogicalTransactionStore(logFiles, metadataCache, reader, monitors, false);
        CorruptedLogsTruncator logPruner = new CorruptedLogsTruncator(storeDir, logFiles, fileSystem, INSTANCE);
        monitors.addMonitorListener(monitor);
        life.add(new TransactionLogsRecovery(new DefaultRecoveryService(storageEngine, transactionIdStore, txStore, versionRepository, logFiles, NO_MONITOR, mock(Log.class), false) {

            private int nr;

            @Override
            public RecoveryApplier getRecoveryApplier(TransactionApplicationMode mode, PageCacheTracer cacheTracer, String tracerTag) {
                RecoveryApplier actual = super.getRecoveryApplier(mode, cacheTracer, tracerTag);
                if (mode == TransactionApplicationMode.REVERSE_RECOVERY) {
                    return actual;
                }
                return new RecoveryApplier() {

                    @Override
                    public void close() throws Exception {
                        actual.close();
                    }

                    @Override
                    public boolean visit(CommittedTransactionRepresentation tx) throws Exception {
                        actual.visit(tx);
                        switch(nr++) {
                            case 0:
                                assertEquals(lastCommittedTxStartEntry, tx.getStartEntry());
                                assertEquals(lastCommittedTxCommitEntry, tx.getCommitEntry());
                                break;
                            case 1:
                                assertEquals(expectedStartEntry, tx.getStartEntry());
                                assertEquals(expectedCommitEntry, tx.getCommitEntry());
                                break;
                            default:
                                fail("Too many recovered transactions");
                        }
                        return false;
                    }
                };
            }
        }, logPruner, schemaLife, monitor, ProgressReporter.SILENT, false, EMPTY_CHECKER, NULL));
        life.start();
        assertTrue(recoveryRequired.get());
        assertEquals(2, recoveredTransactions.getValue());
    } finally {
        life.shutdown();
    }
}

Example 30 with LogFile

use of org.neo4j.kernel.impl.transaction.log.files.LogFile in project neo4j by neo4j.

the class CorruptedLogsTruncatorTest method doNotPruneNonCorruptedLogs.

@Test
void doNotPruneNonCorruptedLogs() throws IOException {
    life.start();
    generateTransactionLogFiles(logFiles);
    var logFile = logFiles.getLogFile();
    long highestLogVersion = logFile.getHighestLogVersion();
    long fileSizeBeforePrune = Files.size(logFile.getHighestLogFile());
    LogPosition endOfLogsPosition = new LogPosition(highestLogVersion, fileSizeBeforePrune);
    assertEquals(TOTAL_NUMBER_OF_TRANSACTION_LOG_FILES - 1, highestLogVersion);
    logPruner.truncate(endOfLogsPosition);
    assertEquals(TOTAL_NUMBER_OF_LOG_FILES, logFiles.logFiles().length);
    assertEquals(fileSizeBeforePrune, Files.size(logFile.getHighestLogFile()));
    assertTrue(ArrayUtils.isEmpty(databaseDirectory.toFile().listFiles(File::isDirectory)));
}