Examples with DLIllegalStateException org.apache.distributedlog.exceptions.DLIllegalStateException used on opensource projects

Example 6 with DLIllegalStateException

use of org.apache.distributedlog.exceptions.DLIllegalStateException in project bookkeeper by apache.

the class ReadAheadEntryReader method unsafeReinitializeLogSegments.

/**
 * Reinitialize the log segments.
 */
private void unsafeReinitializeLogSegments(List<LogSegmentMetadata> segments) {
    logger.info("Reinitialize log segments with {}", segments);
    int segmentIdx = 0;
    for (; segmentIdx < segments.size(); segmentIdx++) {
        LogSegmentMetadata segment = segments.get(segmentIdx);
        if (segment.getLogSegmentSequenceNumber() < currentSegmentSequenceNumber) {
            continue;
        }
        break;
    }
    if (segmentIdx >= segments.size()) {
        return;
    }
    LogSegmentMetadata segment = segments.get(segmentIdx);
    if (null != currentSegmentReader) {
        if (!updateLogSegmentMetadata(currentSegmentReader, segment)) {
            return;
        }
    } else {
        if (currentSegmentSequenceNumber != segment.getLogSegmentSequenceNumber()) {
            logger.error("Inconsistent state found in entry reader for {} : " + "current segment sn = {}, new segment sn = {}", new Object[] { streamName, currentSegmentSequenceNumber, segment.getLogSegmentSequenceNumber() });
            setLastException(new DLIllegalStateException("Inconsistent state found in entry reader for " + streamName + " : current segment sn = " + currentSegmentSequenceNumber + ", new segment sn = " + segment.getLogSegmentSequenceNumber()));
            return;
        }
    }
    segmentIdx++;
    if (segmentIdx >= segments.size()) {
        return;
    }
    // check next segment
    segment = segments.get(segmentIdx);
    if (null != nextSegmentReader) {
        if (!updateLogSegmentMetadata(nextSegmentReader, segment)) {
            return;
        }
        segmentIdx++;
    }
    // check the segment readers in the queue
    for (int readerIdx = 0; readerIdx < segmentReaders.size() && segmentIdx < segments.size(); readerIdx++, segmentIdx++) {
        SegmentReader reader = segmentReaders.get(readerIdx);
        segment = segments.get(segmentIdx);
        if (!updateLogSegmentMetadata(reader, segment)) {
            return;
        }
    }
    // add the remaining segments to the reader queue
    for (; segmentIdx < segments.size(); segmentIdx++) {
        segment = segments.get(segmentIdx);
        SegmentReader reader = new SegmentReader(segment, 0L);
        reader.openReader();
        segmentReaders.add(reader);
    }
    if (null == currentSegmentReader) {
        unsafeMoveToNextLogSegment();
    }
    // resume readahead if necessary
    invokeReadAhead();
}

Example 7 with DLIllegalStateException

use of org.apache.distributedlog.exceptions.DLIllegalStateException in project bookkeeper by apache.

the class ReadAheadEntryReader method updateLogSegmentMetadata.

/**
 * Update the log segment metadata.
 *
 * @param reader the reader to update the metadata
 * @param newMetadata the new metadata received
 * @return true if successfully, false on encountering errors
 */
private boolean updateLogSegmentMetadata(SegmentReader reader, LogSegmentMetadata newMetadata) {
    if (reader.getSegment().getLogSegmentSequenceNumber() != newMetadata.getLogSegmentSequenceNumber()) {
        logger.error("Inconsistent state found in entry reader for {} : " + "current segment = {}, new segment = {}", new Object[] { streamName, reader.getSegment(), newMetadata });
        setLastException(new DLIllegalStateException("Inconsistent state found in entry reader for " + streamName + " : current segment = " + reader.getSegment() + ", new segment = " + newMetadata));
        return false;
    }
    if (!reader.getSegment().isInProgress() && newMetadata.isInProgress()) {
        setLastException(new DLIllegalStateException("An inprogress log segment " + newMetadata + " received after a closed log segment " + reader.getSegment() + " on reading segment " + newMetadata.getLogSegmentSequenceNumber() + " @ stream " + streamName));
        return false;
    }
    if (reader.getSegment().isInProgress() && !newMetadata.isInProgress()) {
        reader.updateLogSegmentMetadata(newMetadata);
    }
    return true;
}

Example 8 with DLIllegalStateException

use of org.apache.distributedlog.exceptions.DLIllegalStateException in project bookkeeper by apache.

the class TestBKDistributedLogManager method deleteDuringRead.

@Test(timeout = 60000)
public void deleteDuringRead() throws Exception {
    String name = "distrlog-delete-with-reader";
    DistributedLogManager dlm = createNewDLM(conf, name);
    long txid = 1;
    for (long i = 0; i < 3; i++) {
        long start = txid;
        BKSyncLogWriter writer = (BKSyncLogWriter) dlm.startLogSegmentNonPartitioned();
        for (long j = 1; j <= DEFAULT_SEGMENT_SIZE; j++) {
            writer.write(DLMTestUtil.getLogRecordInstance(txid++));
        }
        BKLogSegmentWriter perStreamLogWriter = writer.getCachedLogWriter();
        writer.closeAndComplete();
        BKLogWriteHandler blplm = ((BKDistributedLogManager) (dlm)).createWriteHandler(true);
        assertNotNull(zkc.exists(blplm.completedLedgerZNode(start, txid - 1, perStreamLogWriter.getLogSegmentSequenceNumber()), false));
        Utils.ioResult(blplm.asyncClose());
    }
    LogReader reader = dlm.getInputStream(1);
    LogRecord record = reader.readNext(false);
    assert (null != record);
    DLMTestUtil.verifyLogRecord(record);
    long lastTxId = record.getTransactionId();
    dlm.delete();
    boolean exceptionEncountered;
    try {
        record = reader.readNext(false);
        while (null != record) {
            DLMTestUtil.verifyLogRecord(record);
            assert (lastTxId < record.getTransactionId());
            lastTxId = record.getTransactionId();
            record = reader.readNext(false);
        }
        // make sure the exception is thrown from readahead
        while (true) {
            reader.readNext(false);
        }
    } catch (LogReadException | LogNotFoundException | DLIllegalStateException e) {
        exceptionEncountered = true;
    }
    assertTrue(exceptionEncountered);
    reader.close();
}

Example 9 with DLIllegalStateException

use of org.apache.distributedlog.exceptions.DLIllegalStateException in project bookkeeper by apache.

the class TestLogSegmentsZK method testCreateLogSegmentUnmatchMaxSequenceNumber.

/**
 * Create Log Segment while max sequence number isn't match with list of log segments.
 */
@Test(timeout = 60000)
public void testCreateLogSegmentUnmatchMaxSequenceNumber() throws Exception {
    URI uri = createURI();
    String streamName = testName.getMethodName();
    DistributedLogConfiguration conf = new DistributedLogConfiguration().setLockTimeout(99999).setOutputBufferSize(0).setImmediateFlushEnabled(true).setEnableLedgerAllocatorPool(true).setLedgerAllocatorPoolName("test");
    Namespace namespace = NamespaceBuilder.newBuilder().conf(conf).uri(uri).build();
    namespace.createLog(streamName);
    MaxLogSegmentSequenceNo max1 = getMaxLogSegmentSequenceNo(getZooKeeperClient(namespace), uri, streamName, conf);
    assertEquals(DistributedLogConstants.UNASSIGNED_LOGSEGMENT_SEQNO, max1.getSequenceNumber());
    DistributedLogManager dlm = namespace.openLog(streamName);
    final int numSegments = 3;
    for (int i = 0; i < numSegments; i++) {
        BKSyncLogWriter out = (BKSyncLogWriter) dlm.startLogSegmentNonPartitioned();
        out.write(DLMTestUtil.getLogRecordInstance(i));
        out.closeAndComplete();
    }
    MaxLogSegmentSequenceNo max2 = getMaxLogSegmentSequenceNo(getZooKeeperClient(namespace), uri, streamName, conf);
    assertEquals(3, max2.getSequenceNumber());
    // update the max ledger sequence number
    updateMaxLogSegmentSequenceNo(getZooKeeperClient(namespace), uri, streamName, conf, DLUtils.serializeLogSegmentSequenceNumber(99));
    DistributedLogManager dlm1 = namespace.openLog(streamName);
    try {
        BKSyncLogWriter out1 = (BKSyncLogWriter) dlm1.startLogSegmentNonPartitioned();
        out1.write(DLMTestUtil.getLogRecordInstance(numSegments + 1));
        out1.closeAndComplete();
        fail("Should fail creating new log segment when encountered unmatch max ledger sequence number");
    } catch (DLIllegalStateException lse) {
    // expected
    } finally {
        dlm1.close();
    }
    DistributedLogManager dlm2 = namespace.openLog(streamName);
    List<LogSegmentMetadata> segments = dlm2.getLogSegments();
    try {
        assertEquals(3, segments.size());
        assertEquals(1L, segments.get(0).getLogSegmentSequenceNumber());
        assertEquals(2L, segments.get(1).getLogSegmentSequenceNumber());
        assertEquals(3L, segments.get(2).getLogSegmentSequenceNumber());
    } finally {
        dlm2.close();
    }
    dlm.close();
    namespace.close();
}

Example 10 with DLIllegalStateException

use of org.apache.distributedlog.exceptions.DLIllegalStateException in project bookkeeper by apache.

the class BKAsyncLogReader method safeRun.

@Override
public void safeRun() {
    synchronized (scheduleLock) {
        if (scheduleDelayStopwatch.isRunning()) {
            scheduleLatency.registerSuccessfulEvent(scheduleDelayStopwatch.stop().elapsed(TimeUnit.MICROSECONDS), TimeUnit.MICROSECONDS);
        }
        Stopwatch runTime = Stopwatch.createStarted();
        int iterations = 0;
        long scheduleCountLocal = scheduleCountUpdater.get(this);
        LOG.debug("{}: Scheduled Background Reader", readHandler.getFullyQualifiedName());
        while (true) {
            if (LOG.isTraceEnabled()) {
                LOG.trace("{}: Executing Iteration: {}", readHandler.getFullyQualifiedName(), iterations++);
            }
            PendingReadRequest nextRequest = null;
            synchronized (this) {
                nextRequest = pendingRequests.peek();
                // Queue is empty, nothing to read, return
                if (null == nextRequest) {
                    LOG.trace("{}: Queue Empty waiting for Input", readHandler.getFullyQualifiedName());
                    scheduleCountUpdater.set(this, 0);
                    backgroundReaderRunTime.registerSuccessfulEvent(runTime.stop().elapsed(TimeUnit.MICROSECONDS), TimeUnit.MICROSECONDS);
                    return;
                }
                if (disableProcessingReadRequests) {
                    LOG.info("Reader of {} is forced to stop processing read requests", readHandler.getFullyQualifiedName());
                    return;
                }
            }
            lastProcessTime.reset().start();
            // know the last consumed read
            if (null == lastExceptionUpdater.get(this)) {
                if (nextRequest.getPromise().isCancelled()) {
                    setLastException(new DLInterruptedException("Interrupted on reading " + readHandler.getFullyQualifiedName()));
                }
            }
            if (checkClosedOrInError("readNext")) {
                Throwable lastException = lastExceptionUpdater.get(this);
                if (lastException != null && !(lastException.getCause() instanceof LogNotFoundException)) {
                    LOG.warn("{}: Exception", readHandler.getFullyQualifiedName(), lastException);
                }
                backgroundReaderRunTime.registerFailedEvent(runTime.stop().elapsed(TimeUnit.MICROSECONDS), TimeUnit.MICROSECONDS);
                return;
            }
            try {
                // Fail 10% of the requests when asked to simulate errors
                if (bkDistributedLogManager.getFailureInjector().shouldInjectErrors()) {
                    throw new IOException("Reader Simulated Exception");
                }
                LogRecordWithDLSN record;
                while (!nextRequest.hasReadEnoughRecords()) {
                    // read single record
                    do {
                        record = readNextRecord();
                    } while (null != record && (record.isControl() || (record.getDlsn().compareTo(getStartDLSN()) < 0)));
                    if (null == record) {
                        break;
                    } else {
                        if (record.isEndOfStream() && !returnEndOfStreamRecord) {
                            setLastException(new EndOfStreamException("End of Stream Reached for " + readHandler.getFullyQualifiedName()));
                            break;
                        }
                        // gap detection
                        if (recordPositionsContainsGap(record, lastPosition)) {
                            bkDistributedLogManager.raiseAlert("Gap detected between records at record = {}", record);
                            if (positionGapDetectionEnabled) {
                                throw new DLIllegalStateException("Gap detected between records at record = " + record);
                            }
                        }
                        lastPosition = record.getLastPositionWithinLogSegment();
                        nextRequest.addRecord(record);
                    }
                }
            } catch (IOException exc) {
                setLastException(exc);
                if (!(exc instanceof LogNotFoundException)) {
                    LOG.warn("{} : read with skip Exception", readHandler.getFullyQualifiedName(), lastExceptionUpdater.get(this));
                }
                continue;
            }
            if (nextRequest.hasReadRecords()) {
                long remainingWaitTime = nextRequest.getRemainingWaitTime();
                if (remainingWaitTime > 0 && !nextRequest.hasReadEnoughRecords()) {
                    backgroundReaderRunTime.registerSuccessfulEvent(runTime.stop().elapsed(TimeUnit.MICROSECONDS), TimeUnit.MICROSECONDS);
                    scheduleDelayStopwatch.reset().start();
                    scheduleCountUpdater.set(this, 0);
                    // the request could still wait for more records
                    backgroundScheduleTask = scheduler.scheduleOrdered(streamName, BACKGROUND_READ_SCHEDULER, remainingWaitTime, nextRequest.deadlineTimeUnit);
                    return;
                }
                PendingReadRequest request = pendingRequests.poll();
                if (null != request && nextRequest == request) {
                    request.complete();
                    if (null != backgroundScheduleTask) {
                        backgroundScheduleTask.cancel(true);
                        backgroundScheduleTask = null;
                    }
                } else {
                    DLIllegalStateException ise = new DLIllegalStateException("Unexpected condition at dlsn = " + nextRequest.records.get(0).getDlsn());
                    nextRequest.completeExceptionally(ise);
                    if (null != request) {
                        request.completeExceptionally(ise);
                    }
                    // We should never get here as we should have exited the loop if
                    // pendingRequests were empty
                    bkDistributedLogManager.raiseAlert("Unexpected condition at dlsn = {}", nextRequest.records.get(0).getDlsn());
                    setLastException(ise);
                }
            } else {
                if (0 == scheduleCountLocal) {
                    LOG.trace("Schedule count dropping to zero", lastExceptionUpdater.get(this));
                    backgroundReaderRunTime.registerSuccessfulEvent(runTime.stop().elapsed(TimeUnit.MICROSECONDS), TimeUnit.MICROSECONDS);
                    return;
                }
                scheduleCountLocal = scheduleCountUpdater.decrementAndGet(this);
            }
        }
    }
}