jsun98 commented on a change in pull request #6431: Add Kinesis Indexing
Service to core Druid
URL: https://github.com/apache/incubator-druid/pull/6431#discussion_r238026369
##########
File path:
indexing-service/src/main/java/org/apache/druid/indexing/seekablestream/SeekableStreamIndexTaskRunner.java
##########
@@ -16,55 +16,1991 @@
* specific language governing permissions and limitations
* under the License.
*/
+
package org.apache.druid.indexing.seekablestream;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Function;
+import com.google.common.base.Joiner;
+import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
+import com.google.common.base.Supplier;
+import com.google.common.base.Throwables;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Sets;
+import com.google.common.util.concurrent.FutureCallback;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.SettableFuture;
+import org.apache.druid.data.input.Committer;
+import org.apache.druid.data.input.InputRow;
+import org.apache.druid.data.input.impl.InputRowParser;
+import org.apache.druid.discovery.DiscoveryDruidNode;
+import org.apache.druid.discovery.LookupNodeService;
+import org.apache.druid.discovery.NodeType;
+import org.apache.druid.indexer.IngestionState;
import org.apache.druid.indexer.TaskStatus;
+import org.apache.druid.indexing.common.IngestionStatsAndErrorsTaskReport;
+import org.apache.druid.indexing.common.IngestionStatsAndErrorsTaskReportData;
+import org.apache.druid.indexing.common.TaskRealtimeMetricsMonitorBuilder;
+import org.apache.druid.indexing.common.TaskReport;
import org.apache.druid.indexing.common.TaskToolbox;
+import
org.apache.druid.indexing.common.actions.CheckPointDataSourceMetadataAction;
+import org.apache.druid.indexing.common.actions.ResetDataSourceMetadataAction;
+import
org.apache.druid.indexing.common.actions.SegmentTransactionalInsertAction;
import org.apache.druid.indexing.common.stats.RowIngestionMeters;
+import org.apache.druid.indexing.common.stats.RowIngestionMetersFactory;
+import org.apache.druid.indexing.common.task.IndexTaskUtils;
+import org.apache.druid.indexing.common.task.RealtimeIndexTask;
+import
org.apache.druid.indexing.seekablestream.common.OrderedPartitionableRecord;
+import org.apache.druid.indexing.seekablestream.common.OrderedSequenceNumber;
+import org.apache.druid.indexing.seekablestream.common.RecordSupplier;
+import org.apache.druid.indexing.seekablestream.common.StreamPartition;
+import org.apache.druid.java.util.common.DateTimes;
+import org.apache.druid.java.util.common.ISE;
+import org.apache.druid.java.util.common.StringUtils;
+import org.apache.druid.java.util.common.collect.Utils;
+import org.apache.druid.java.util.common.parsers.ParseException;
+import org.apache.druid.java.util.emitter.EmittingLogger;
+import org.apache.druid.segment.indexing.RealtimeIOConfig;
+import org.apache.druid.segment.realtime.FireDepartment;
+import org.apache.druid.segment.realtime.FireDepartmentMetrics;
import org.apache.druid.segment.realtime.appenderator.Appenderator;
+import
org.apache.druid.segment.realtime.appenderator.AppenderatorDriverAddResult;
+import org.apache.druid.segment.realtime.appenderator.SegmentsAndMetadata;
+import org.apache.druid.segment.realtime.appenderator.StreamAppenderatorDriver;
+import
org.apache.druid.segment.realtime.appenderator.TransactionalSegmentPublisher;
import org.apache.druid.segment.realtime.firehose.ChatHandler;
+import org.apache.druid.segment.realtime.firehose.ChatHandlerProvider;
+import org.apache.druid.server.security.Access;
+import org.apache.druid.server.security.Action;
+import org.apache.druid.server.security.AuthorizerMapper;
+import org.apache.druid.timeline.DataSegment;
+import org.apache.druid.utils.CircularBuffer;
+import org.joda.time.DateTime;
+import javax.annotation.Nullable;
+import javax.annotation.ParametersAreNonnullByDefault;
+import javax.servlet.http.HttpServletRequest;
+import javax.validation.constraints.NotNull;
+import javax.ws.rs.Consumes;
+import javax.ws.rs.DefaultValue;
+import javax.ws.rs.GET;
+import javax.ws.rs.POST;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.QueryParam;
+import javax.ws.rs.core.Context;
+import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
+import java.io.File;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
import java.util.Map;
+import java.util.Set;
+import java.util.TreeMap;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+import java.util.concurrent.RejectedExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.locks.Condition;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+import java.util.stream.Collectors;
/**
* Interface for abstracting the indexing task run logic. Only used by Kafka
indexing tasks,
* but will also be used by Kinesis indexing tasks once implemented
*
* @param <PartitionType> Partition Number Type
- * @param <SequenceType> Sequence Number Type
+ * @param <SequenceType> Sequence Number Type
*/
-public interface SeekableStreamIndexTaskRunner<PartitionType, SequenceType>
extends ChatHandler
+public abstract class SeekableStreamIndexTaskRunner<PartitionType,
SequenceType> implements ChatHandler
{
- Appenderator getAppenderator();
+ public enum Status
+ {
+ NOT_STARTED,
+ STARTING,
+ READING,
+ PAUSED,
+ PUBLISHING
+ }
- TaskStatus run(TaskToolbox toolbox);
+ private final EmittingLogger log = new EmittingLogger(this.getClass());
+ private static final String METADATA_NEXT_PARTITIONS = "nextPartitions";
+ private static final String METADATA_PUBLISH_PARTITIONS =
"publishPartitions";
- void stopGracefully();
+ private final Map<PartitionType, SequenceType> endOffsets;
+ private final Map<PartitionType, SequenceType> currOffsets = new
ConcurrentHashMap<>();
+ private final Map<PartitionType, SequenceType> lastPersistedOffsets = new
ConcurrentHashMap<>();
- @VisibleForTesting
- RowIngestionMeters getRowIngestionMeters();
+ // The pause lock and associated conditions are to support coordination
between the Jetty threads and the main
+ // ingestion loop. The goal is to provide callers of the API a guarantee
that if pause() returns successfully
+ // the ingestion loop has been stopped at the returned sequences and will
not ingest any more data until resumed. The
+ // fields are used as follows (every step requires acquiring [pauseLock]):
+ // Pausing:
+ // - In pause(), [pauseRequested] is set to true and then execution waits
for [status] to change to PAUSED, with the
+ // condition checked when [hasPaused] is signalled.
+ // - In possiblyPause() called from the main loop, if [pauseRequested] is
true, [status] is set to PAUSED,
+ // [hasPaused] is signalled, and execution pauses until [pauseRequested]
becomes false, either by being set or by
+ // the [pauseMillis] timeout elapsing. [pauseRequested] is checked when
[shouldResume] is signalled.
+ // Resuming:
+ // - In resume(), [pauseRequested] is set to false, [shouldResume] is
signalled, and execution waits for [status] to
+ // change to something other than PAUSED, with the condition checked
when [shouldResume] is signalled.
+ // - In possiblyPause(), when [shouldResume] is signalled, if
[pauseRequested] has become false the pause loop ends,
+ // [status] is changed to STARTING and [shouldResume] is signalled.
+ private final Lock pauseLock = new ReentrantLock();
+ private final Condition hasPaused = pauseLock.newCondition();
+ private final Condition shouldResume = pauseLock.newCondition();
- @VisibleForTesting
- SeekableStreamIndexTask.Status getStatus();
+ protected final AtomicBoolean stopRequested = new AtomicBoolean(false);
+ private final AtomicBoolean publishOnStop = new AtomicBoolean(false);
+
+ // [statusLock] is used to synchronize the Jetty thread calling
stopGracefully() with the main run thread. It prevents
+ // the main run thread from switching into a publishing state while the
stopGracefully() thread thinks it's still in
+ // a pre-publishing state. This is important because stopGracefully() will
try to use the [stopRequested] flag to stop
+ // the main thread where possible, but this flag is not honored once
publishing has begun so in this case we must
+ // interrupt the thread. The lock ensures that if the run thread is about to
transition into publishing state, it
+ // blocks until after stopGracefully() has set [stopRequested] and then does
a final check on [stopRequested] before
+ // transitioning to publishing state.
+ private final Object statusLock = new Object();
+
+ protected final Lock pollRetryLock = new ReentrantLock();
+ protected final Condition isAwaitingRetry = pollRetryLock.newCondition();
+
+ private final SeekableStreamIndexTask<PartitionType, SequenceType> task;
+ private final SeekableStreamIOConfig<PartitionType, SequenceType> ioConfig;
+ private final SeekableStreamTuningConfig tuningConfig;
+ private final InputRowParser<ByteBuffer> parser;
+ private final AuthorizerMapper authorizerMapper;
+ private final Optional<ChatHandlerProvider> chatHandlerProvider;
+ private final CircularBuffer<Throwable> savedParseExceptions;
+ private final String stream;
+ private final RowIngestionMeters rowIngestionMeters;
+
+ private final Set<String> publishingSequences = Sets.newConcurrentHashSet();
+ private final List<ListenableFuture<SegmentsAndMetadata>> publishWaitList =
new ArrayList<>();
+ private final List<ListenableFuture<SegmentsAndMetadata>> handOffWaitList =
new ArrayList<>();
+ private final Map<PartitionType, SequenceType> initialOffsetsSnapshot = new
HashMap<>();
+ private final Set<PartitionType> exclusiveStartingPartitions = new
HashSet<>();
+
+ // true for kafka, falsse for kinesis
+ private final boolean isSkipSegmentLineageCheck;
+
+ private volatile DateTime startTime;
+ private volatile Status status = Status.NOT_STARTED; // this is only ever
set by the task runner thread (runThread)
+ private volatile TaskToolbox toolbox;
+ private volatile Thread runThread;
+ private volatile Appenderator appenderator;
+ private volatile StreamAppenderatorDriver driver;
+ private volatile IngestionState ingestionState;
+
+ protected volatile boolean pauseRequested = false;
+ private volatile long nextCheckpointTime;
+
+ private volatile CopyOnWriteArrayList<SequenceMetadata> sequences;
+ private volatile Throwable backgroundThreadException;
+
+ public SeekableStreamIndexTaskRunner(
+ final SeekableStreamIndexTask<PartitionType, SequenceType> task,
+ final InputRowParser<ByteBuffer> parser,
+ final AuthorizerMapper authorizerMapper,
+ final Optional<ChatHandlerProvider> chatHandlerProvider,
+ final CircularBuffer<Throwable> savedParseExceptions,
+ final RowIngestionMetersFactory rowIngestionMetersFactory,
+ final boolean isSkipSegmentLineageCheck
+ )
+ {
+ this.task = task;
+ this.ioConfig = task.getIOConfig();
+ this.tuningConfig = task.getTuningConfig();
+ this.parser = parser;
+ this.authorizerMapper = authorizerMapper;
+ this.chatHandlerProvider = chatHandlerProvider;
+ this.savedParseExceptions = savedParseExceptions;
+ this.stream = ioConfig.getStartPartitions().getStream();
+ this.rowIngestionMeters =
rowIngestionMetersFactory.createRowIngestionMeters();
+ this.isSkipSegmentLineageCheck = isSkipSegmentLineageCheck;
+
+ this.endOffsets = new
ConcurrentHashMap<>(ioConfig.getEndPartitions().getPartitionSequenceNumberMap());
+ this.sequences = new CopyOnWriteArrayList<>();
+ this.ingestionState = IngestionState.NOT_STARTED;
+
+ resetNextCheckpointTime();
+ }
+
+
+ public TaskStatus run(TaskToolbox toolbox)
+ {
+ try {
+ return runInternal(toolbox);
+ }
+ catch (Exception e) {
+ log.error(e, "Encountered exception while running task.");
+ final String errorMsg = Throwables.getStackTraceAsString(e);
+
toolbox.getTaskReportFileWriter().write(getTaskCompletionReports(errorMsg));
+ return TaskStatus.failure(
+ task.getId(),
+ errorMsg
+ );
+ }
+ }
+
+ private TaskStatus runInternal(TaskToolbox toolbox) throws Exception
+ {
+ log.info("SeekableStream indexing task starting up!");
+ startTime = DateTimes.nowUtc();
+ status = Status.STARTING;
+ this.toolbox = toolbox;
+
+
+ if (!restoreSequences()) {
+ final TreeMap<Integer, Map<PartitionType, SequenceType>> checkpoints =
getCheckPointsFromContext(toolbox, task);
+ if (checkpoints != null) {
+ boolean exclusive = false;
+ Iterator<Map.Entry<Integer, Map<PartitionType, SequenceType>>>
sequenceOffsets = checkpoints.entrySet()
+
.iterator();
+ Map.Entry<Integer, Map<PartitionType, SequenceType>> previous =
sequenceOffsets.next();
+ while (sequenceOffsets.hasNext()) {
+ Map.Entry<Integer, Map<PartitionType, SequenceType>> current =
sequenceOffsets.next();
+ sequences.add(createSequenceMetaData(
+ previous.getKey(),
+ StringUtils.format("%s_%s", ioConfig.getBaseSequenceName(),
previous.getKey()),
+ previous.getValue(),
+ current.getValue(),
+ true,
+ exclusive ? previous.getValue().keySet() : null
+ ));
+ previous = current;
+ exclusive = true;
+ }
+ sequences.add(createSequenceMetaData(
+ previous.getKey(),
+ StringUtils.format("%s_%s", ioConfig.getBaseSequenceName(),
previous.getKey()),
+ previous.getValue(),
+ endOffsets,
+ false,
+ exclusive ? previous.getValue().keySet() : null
+ ));
+ } else {
+ sequences.add(createSequenceMetaData(
+ 0,
+ StringUtils.format("%s_%s", ioConfig.getBaseSequenceName(), 0),
+ ioConfig.getStartPartitions().getPartitionSequenceNumberMap(),
+ endOffsets,
+ false,
+ null
+ ));
+ }
+ }
+
+ log.info("Starting with sequences: %s", sequences);
+
+ if (chatHandlerProvider.isPresent()) {
+ log.info("Found chat handler of class[%s]",
chatHandlerProvider.get().getClass().getName());
+ chatHandlerProvider.get().register(task.getId(), this, false);
+ } else {
+ log.warn("No chat handler detected");
+ }
+
+ runThread = Thread.currentThread();
+
+ // Set up FireDepartmentMetrics
+ final FireDepartment fireDepartmentForMetrics = new FireDepartment(
+ task.getDataSchema(),
+ new RealtimeIOConfig(null, null, null),
+ null
+ );
+ FireDepartmentMetrics fireDepartmentMetrics =
fireDepartmentForMetrics.getMetrics();
+ toolbox.getMonitorScheduler()
+ .addMonitor(TaskRealtimeMetricsMonitorBuilder.build(task,
fireDepartmentForMetrics, rowIngestionMeters));
+
+ final String lookupTier =
task.getContextValue(RealtimeIndexTask.CTX_KEY_LOOKUP_TIER);
+ final LookupNodeService lookupNodeService = lookupTier == null ?
+ toolbox.getLookupNodeService()
:
+ new
LookupNodeService(lookupTier);
+
+ final DiscoveryDruidNode discoveryDruidNode = new DiscoveryDruidNode(
+ toolbox.getDruidNode(),
+ NodeType.PEON,
+ ImmutableMap.of(
+ toolbox.getDataNodeService().getName(),
toolbox.getDataNodeService(),
+ lookupNodeService.getName(), lookupNodeService
+ )
+ );
+
+ Throwable caughtExceptionOuter = null;
+ try (final RecordSupplier<PartitionType, SequenceType> recordSupplier =
task.newRecordSupplier()) {
+ toolbox.getDataSegmentServerAnnouncer().announce();
+ toolbox.getDruidNodeAnnouncer().announce(discoveryDruidNode);
+
+ appenderator = task.newAppenderator(fireDepartmentMetrics, toolbox);
+ driver = task.newDriver(appenderator, toolbox, fireDepartmentMetrics);
+
+ final String stream = ioConfig.getStartPartitions().getStream();
+
+ // Start up, set up initial sequences.
+ final Object restoredMetadata = driver.startJob();
+ if (restoredMetadata == null) {
+ // no persist has happened so far
+ // so either this is a brand new task or replacement of a failed task
+
Preconditions.checkState(sequences.get(0).startOffsets.entrySet().stream().allMatch(
+ partitionOffsetEntry ->
+
createSequenceNumber(partitionOffsetEntry.getValue()).compareTo(
+ createSequenceNumber(ioConfig.getStartPartitions()
+
.getPartitionSequenceNumberMap()
+
.get(partitionOffsetEntry.getKey())
+ )) >= 0
+ ), "Sequence sequences are not compatible with start sequences of
task");
+ currOffsets.putAll(sequences.get(0).startOffsets);
+ } else {
+ @SuppressWarnings("unchecked")
+ final Map<String, Object> restoredMetadataMap = (Map) restoredMetadata;
+ final SeekableStreamPartitions<PartitionType, SequenceType>
restoredNextPartitions = createSeekableStreamPartitions(
+ toolbox.getObjectMapper(),
+ restoredMetadataMap.get(METADATA_NEXT_PARTITIONS)
+ );
+
+
currOffsets.putAll(restoredNextPartitions.getPartitionSequenceNumberMap());
+
+ // Sanity checks.
+ if
(!restoredNextPartitions.getStream().equals(ioConfig.getStartPartitions().getStream()))
{
+ throw new ISE(
+ "WTF?! Restored stream[%s] but expected stream[%s]",
+ restoredNextPartitions.getStream(),
+ ioConfig.getStartPartitions().getStream()
+ );
+ }
+
+ if
(!currOffsets.keySet().equals(ioConfig.getStartPartitions().getPartitionSequenceNumberMap().keySet()))
{
+ throw new ISE(
+ "WTF?! Restored partitions[%s] but expected partitions[%s]",
+ currOffsets.keySet(),
+
ioConfig.getStartPartitions().getPartitionSequenceNumberMap().keySet()
+ );
+ }
+ // sequences size can be 0 only when all sequences got published and
task stopped before it could finish
+ // which is super rare
+ if (sequences.size() == 0 || sequences.get(sequences.size() -
1).isCheckpointed()) {
+ this.endOffsets.putAll(sequences.size() == 0
+ ? currOffsets
+ : sequences.get(sequences.size() -
1).getEndOffsets());
+ log.info("End sequences changed to [%s]", endOffsets);
+ }
+ }
+
+ // Filter out partitions with END_OF_SHARD markers since these
partitions have already been fully read. This
+ // should have been done by the supervisor already so this is defensive.
+ int numPreFilterPartitions = currOffsets.size();
+ if (currOffsets.entrySet().removeIf(x ->
OrderedPartitionableRecord.END_OF_SHARD_MARKER.equals(x.getValue()))) {
+ log.info(
+ "Removed [%d] partitions from assignment which have already been
closed",
+ numPreFilterPartitions - currOffsets.size()
+ );
+ }
+
+ // Set up committer.
+ final Supplier<Committer> committerSupplier = () -> {
+ final Map<PartitionType, SequenceType> snapshot =
ImmutableMap.copyOf(currOffsets);
+ lastPersistedOffsets.clear();
+ lastPersistedOffsets.putAll(snapshot);
+
+ return new Committer()
+ {
+ @Override
+ public Object getMetadata()
+ {
+ return ImmutableMap.of(
+ METADATA_NEXT_PARTITIONS, new SeekableStreamPartitions<>(
+ ioConfig.getStartPartitions().getStream(),
+ snapshot
+ )
+ );
+ }
+
+ @Override
+ public void run()
+ {
+ // Do nothing.
+ }
+ };
+ };
+
+ // restart publishing of sequences (if any)
+ maybePersistAndPublishSequences(committerSupplier);
+
+ Set<StreamPartition<PartitionType>> assignment =
assignPartitions(recordSupplier);
+ possiblyResetDataSourceMetadata(recordSupplier, assignment);
+ seekToStartingSequence(recordSupplier, assignment);
+
+ ingestionState = IngestionState.BUILD_SEGMENTS;
+
+ // Main loop.
+ // Could eventually support leader/follower mode (for keeping replicas
more in sync)
+ boolean stillReading = !assignment.isEmpty();
+ status = Status.READING;
+ Throwable caughtExceptionInner = null;
+
+ initialOffsetsSnapshot.putAll(currOffsets);
+
exclusiveStartingPartitions.addAll(ioConfig.getExclusiveStartSequenceNumberPartitions());
+
+ try {
+ while (stillReading) {
+ if (possiblyPause()) {
+ // The partition assignments may have changed while paused by a
call to setEndOffsets() so reassign
+ // partitions upon resuming. This is safe even if the end
sequences have not been modified.
+ assignment = assignPartitions(recordSupplier);
+ possiblyResetDataSourceMetadata(recordSupplier, assignment);
+ seekToStartingSequence(recordSupplier, assignment);
+
+ if (assignment.isEmpty()) {
+ log.info("All partitions have been fully read");
+ publishOnStop.set(true);
+ stopRequested.set(true);
+ }
+ }
+
+ // if stop is requested or task's end sequence is set by call to
setEndOffsets method with finish set to true
+ if (stopRequested.get() || sequences.get(sequences.size() -
1).isCheckpointed()) {
+ status = Status.PUBLISHING;
+ }
+
+ if (stopRequested.get()) {
+ break;
+ }
+
+ if (backgroundThreadException != null) {
+ throw new RuntimeException(backgroundThreadException);
+ }
+
+ checkPublishAndHandoffFailure();
+
+ maybePersistAndPublishSequences(committerSupplier);
+
+
+ // calling getReocrd() ensures that excpetions specific to
kafka/kinesis like OffsetOutOfRangeException
+ // are handled in the subclasses
+ List<OrderedPartitionableRecord<PartitionType, SequenceType>>
records = getRecords(recordSupplier, toolbox);
+
+ stillReading = !assignment.isEmpty();
+
+ SequenceMetadata sequenceToCheckpoint = null;
+ for (OrderedPartitionableRecord<PartitionType, SequenceType> record
: records) {
+
+ // for Kafka, the end offsets are exclusive, so skip it
+ if (getRunnerType() == Type.KAFKA &&
createSequenceNumber(record.getSequenceNumber()).equals(
+
createSequenceNumber(endOffsets.get(record.getPartitionId())))) {
+ continue;
+ }
+
+ // for the first message we receive, check that we were given a
message with a sequenceNumber that matches our
+ // expected starting sequenceNumber
+ if (!verifyInitialRecordAndSkipExclusiveParition(record,
initialOffsetsSnapshot)) {
+ continue;
+ }
+
+ if (log.isTraceEnabled()) {
+ log.trace(
+ "Got stream[%s] partition[%s] sequence[%s].",
+ record.getStream(),
+ record.getPartitionId(),
+ record.getSequenceNumber()
+ );
+ }
+
+ if
(OrderedPartitionableRecord.END_OF_SHARD_MARKER.equals(record.getSequenceNumber()))
{
+ // shard is closed
+ currOffsets.put(record.getPartitionId(),
record.getSequenceNumber());
+ } else if
(createSequenceNumber(record.getSequenceNumber()).compareTo(
+ createSequenceNumber(endOffsets.get(record.getPartitionId())))
<= 0) {
+
+
+ if
(!record.getSequenceNumber().equals(currOffsets.get(record.getPartitionId()))) {
+ if (!ioConfig.isSkipOffsetGaps()) {
+ throw new ISE(
+ "WTF?! Got sequence[%s] after sequence[%s] in
partition[%s].",
+ record.getSequenceNumber(),
+ currOffsets.get(record.getPartitionId()),
+ record.getPartitionId()
+ );
+ }
+ }
+
+ try {
+ final List<byte[]> valueBytess = record.getData();
+ final List<InputRow> rows;
+ if (valueBytess == null || valueBytess.isEmpty()) {
+ rows = Utils.nullableListOf((InputRow) null);
+ } else {
+ rows = new ArrayList<>();
+ for (byte[] valueBytes : valueBytess) {
+
rows.addAll(parser.parseBatch(ByteBuffer.wrap(valueBytes)));
+ }
+ }
+ boolean isPersistRequired = false;
+
+ final SequenceMetadata sequenceToUse = sequences
+ .stream()
+ .filter(sequenceMetadata ->
sequenceMetadata.canHandle(record))
+ .findFirst()
+ .orElse(null);
+
+ if (sequenceToUse == null) {
+ throw new ISE(
+ "WTH?! cannot find any valid sequence for record with
partition [%d] and sequence [%d]. Current sequences: %s",
+ record.getPartitionId(),
+ record.getSequenceNumber(),
+ sequences
+ );
+ }
+
+ for (InputRow row : rows) {
+ if (row != null && task.withinMinMaxRecordTime(row)) {
+ final AppenderatorDriverAddResult addResult = driver.add(
+ row,
+ sequenceToUse.getSequenceName(),
+ committerSupplier,
+ // true for kafka, false for kinesis
+ isSkipSegmentLineageCheck,
+ // do not allow incremental persists to happen until
all the rows from this batch
+ // of rows are indexed
+ false
+ );
+
+ if (addResult.isOk()) {
+ // If the number of rows in the segment exceeds the
threshold after adding a row,
+ // move the segment out from the active segments of
BaseAppenderatorDriver to make a new segment.
+ if (addResult.isPushRequired(tuningConfig) &&
!sequenceToUse.isCheckpointed()) {
+ sequenceToCheckpoint = sequenceToUse;
+ }
+ isPersistRequired |= addResult.isPersistRequired();
+ } else {
+ // Failure to allocate segment puts determinism at risk,
bail out to be safe.
+ // May want configurable behavior here at some point.
+ // If we allow continuing, then consider blacklisting
the interval for a while to avoid constant checks.
+ throw new ISE("Could not allocate segment for row with
timestamp[%s]", row.getTimestamp());
+ }
+
+ if (addResult.getParseException() != null) {
+ handleParseException(addResult.getParseException(),
record);
+ } else {
+ rowIngestionMeters.incrementProcessed();
+ }
+ } else {
+ rowIngestionMeters.incrementThrownAway();
+ }
+ }
+ if (isPersistRequired) {
+ Futures.addCallback(
+ driver.persistAsync(committerSupplier.get()),
+ new FutureCallback<Object>()
+ {
+ @Override
+ public void onSuccess(@Nullable Object result)
+ {
+ log.info("Persist completed with metadata [%s]",
result);
+ }
+
+ @Override
+ public void onFailure(@ParametersAreNonnullByDefault
Throwable t)
+ {
+ log.error("Persist failed, dying");
+ backgroundThreadException = t;
+ }
+ }
+ );
+ }
+ }
+ catch (ParseException e) {
+ handleParseException(e, record);
+ }
+
+ // in kafka, we can easily get the next offset by adding 1, but
for kinesis, there's no way
+ // to get the next sequence number without having to make an
expensive api call. So the behavior
+ // here for kafka is to +1 while for kinesis we simply save the
current sequence numberkkkkk
+ currOffsets.put(record.getPartitionId(),
getNextSequenceNumber(record.getSequenceNumber()));
+ }
+
+ if
((currOffsets.get(record.getPartitionId()).equals(endOffsets.get(record.getPartitionId()))
+ ||
currOffsets.get(record.getPartitionId()).equals(OrderedPartitionableRecord.END_OF_SHARD_MARKER))
+ && assignment.remove(record.getStreamPartition())) {
+ log.info("Finished reading stream[%s], partition[%s].",
record.getStream(), record.getPartitionId());
+ recordSupplier.assign(assignment);
+ stillReading = !assignment.isEmpty();
+ }
+ }
+
+ if (System.currentTimeMillis() > nextCheckpointTime) {
+ sequenceToCheckpoint = sequences.get(sequences.size() - 1);
+ }
+
+ if (sequenceToCheckpoint != null && stillReading) {
+ Preconditions.checkArgument(
+ sequences.get(sequences.size() - 1)
+ .getSequenceName()
+ .equals(sequenceToCheckpoint.getSequenceName()),
+ "Cannot checkpoint a sequence [%s] which is not the latest
one, sequences %s",
+ sequenceToCheckpoint,
+ sequences
+ );
+ requestPause();
+ final CheckPointDataSourceMetadataAction checkpointAction = new
CheckPointDataSourceMetadataAction(
+ task.getDataSource(),
+ ioConfig.getTaskGroupId(),
+ task.getIOConfig().getBaseSequenceName(),
+ createDataSourceMetadata(new SeekableStreamPartitions<>(
+ stream,
+ sequenceToCheckpoint.getStartOffsets()
+ )),
+ createDataSourceMetadata(new
SeekableStreamPartitions<>(stream, currOffsets))
+ );
+ if (!toolbox.getTaskActionClient().submit(checkpointAction)) {
+ throw new ISE("Checkpoint request with sequences [%s] failed,
dying", currOffsets);
+ }
+ }
+ }
+ ingestionState = IngestionState.COMPLETED;
+ }
+ catch (Exception e) {
+ // (1) catch all exceptions while reading from kafka
+ caughtExceptionInner = e;
+ log.error(e, "Encountered exception in run() before persisting.");
+ throw e;
+ }
+ finally {
+ log.info("Persisting all pending data");
+ try {
+ driver.persist(committerSupplier.get()); // persist pending data
+ }
+ catch (Exception e) {
+ if (caughtExceptionInner != null) {
+ caughtExceptionInner.addSuppressed(e);
+ } else {
+ throw e;
+ }
+ }
+ }
+
+ synchronized (statusLock) {
+ if (stopRequested.get() && !publishOnStop.get()) {
+ throw new InterruptedException("Stopping without publishing");
+ }
+
+ status = Status.PUBLISHING;
+ }
+
+ for (SequenceMetadata sequenceMetadata : sequences) {
+ if (!publishingSequences.contains(sequenceMetadata.getSequenceName()))
{
+ // this is done to prevent checks in sequence specific commit
supplier from failing
+ sequenceMetadata.setEndOffsets(currOffsets);
+ sequenceMetadata.updateAssignments(currOffsets);
+ publishingSequences.add(sequenceMetadata.getSequenceName());
+ // persist already done in finally, so directly add to publishQueue
+ publishAndRegisterHandoff(sequenceMetadata);
+ }
+ }
+
+ if (backgroundThreadException != null) {
+ throw new RuntimeException(backgroundThreadException);
+ }
+
+ // Wait for publish futures to complete.
+ Futures.allAsList(publishWaitList).get();
+
+ // Wait for handoff futures to complete.
+ // Note that every publishing task (created by calling
AppenderatorDriver.publish()) has a corresponding
+ // handoffFuture. handoffFuture can throw an exception if 1) the
corresponding publishFuture failed or 2) it
+ // failed to persist sequences. It might also return null if handoff
failed, but was recoverable.
+ // See publishAndRegisterHandoff() for details.
+ List<SegmentsAndMetadata> handedOffList = Collections.emptyList();
+ if (tuningConfig.getHandoffConditionTimeout() == 0) {
+ handedOffList = Futures.allAsList(handOffWaitList).get();
+ } else {
+ try {
+ handedOffList = Futures.allAsList(handOffWaitList)
+
.get(tuningConfig.getHandoffConditionTimeout(), TimeUnit.MILLISECONDS);
+ }
+ catch (TimeoutException e) {
+ // Handoff timeout is not an indexing failure, but coordination
failure. We simply ignore timeout exception
+ // here.
+ log.makeAlert("Timed out after [%d] millis waiting for handoffs",
tuningConfig.getHandoffConditionTimeout())
+ .addData("TaskId", task.getId())
+ .emit();
+ }
+ }
+
+ for (SegmentsAndMetadata handedOff : handedOffList) {
+ log.info(
+ "Handoff completed for segments[%s] with metadata[%s].",
+ Joiner.on(", ").join(
+
handedOff.getSegments().stream().map(DataSegment::getIdentifier).collect(Collectors.toList())
+ ),
+ Preconditions.checkNotNull(handedOff.getCommitMetadata(),
"commitMetadata")
+ );
+ }
+
+ appenderator.close();
+ recordSupplier.close();
+ }
+ catch (InterruptedException | RejectedExecutionException e) {
+ // (2) catch InterruptedException and RejectedExecutionException thrown
for the whole ingestion steps including
+ // the final publishing.
+ caughtExceptionOuter = e;
+ try {
+ Futures.allAsList(publishWaitList).cancel(true);
+ Futures.allAsList(handOffWaitList).cancel(true);
+ if (appenderator != null) {
+ appenderator.closeNow();
+ }
+ }
+ catch (Exception e2) {
+ e.addSuppressed(e2);
+ }
+
+ // handle the InterruptedException that gets wrapped in a
RejectedExecutionException
+ if (e instanceof RejectedExecutionException
+ && (e.getCause() == null || !(e.getCause() instanceof
InterruptedException))) {
+ throw e;
+ }
+
+ // if we were interrupted because we were asked to stop, handle the
exception and return success, else rethrow
+ if (!stopRequested.get()) {
+ Thread.currentThread().interrupt();
+ throw e;
+ }
+
+ log.info("The task was asked to stop before completing");
+ }
+ catch (Exception e) {
+ // (3) catch all other exceptions thrown for the whole ingestion steps
including the final publishing.
+ caughtExceptionOuter = e;
+ try {
+ Futures.allAsList(publishWaitList).cancel(true);
+ Futures.allAsList(handOffWaitList).cancel(true);
+ if (appenderator != null) {
+ appenderator.closeNow();
+ }
+ }
+ catch (Exception e2) {
+ e.addSuppressed(e2);
+ }
+ throw e;
+ }
+ finally {
+ try {
+
+ if (driver != null) {
+ driver.close();
+ }
+ if (chatHandlerProvider.isPresent()) {
+ chatHandlerProvider.get().unregister(task.getId());
+ }
+
+ toolbox.getDruidNodeAnnouncer().unannounce(discoveryDruidNode);
+ toolbox.getDataSegmentServerAnnouncer().unannounce();
+ }
+ catch (Exception e) {
+ if (caughtExceptionOuter != null) {
+ caughtExceptionOuter.addSuppressed(e);
+ } else {
+ throw e;
+ }
+ }
+ }
+
+ toolbox.getTaskReportFileWriter().write(getTaskCompletionReports(null));
+ return TaskStatus.success(task.getId());
+ }
+
+ private void checkPublishAndHandoffFailure() throws ExecutionException,
InterruptedException
+ {
+ // Check if any publishFuture failed.
+ final List<ListenableFuture<SegmentsAndMetadata>> publishFinished =
publishWaitList
+ .stream()
+ .filter(Future::isDone)
+ .collect(Collectors.toList());
+
+ for (ListenableFuture<SegmentsAndMetadata> publishFuture :
publishFinished) {
+ // If publishFuture failed, the below line will throw an exception and
catched by (1), and then (2) or (3).
+ publishFuture.get();
+ }
+
+ publishWaitList.removeAll(publishFinished);
+
+ // Check if any handoffFuture failed.
+ final List<ListenableFuture<SegmentsAndMetadata>> handoffFinished =
handOffWaitList
+ .stream()
+ .filter(Future::isDone)
+ .collect(Collectors.toList());
+
+ for (ListenableFuture<SegmentsAndMetadata> handoffFuture :
handoffFinished) {
+ // If handoffFuture failed, the below line will throw an exception and
catched by (1), and then (2) or (3).
+ handoffFuture.get();
+ }
+
+ handOffWaitList.removeAll(handoffFinished);
+ }
+
+ private void publishAndRegisterHandoff(SequenceMetadata sequenceMetadata)
+ {
+ log.info("Publishing segments for sequence [%s]", sequenceMetadata);
+
+ final ListenableFuture<SegmentsAndMetadata> publishFuture =
Futures.transform(
+ driver.publish(
+ sequenceMetadata.createPublisher(toolbox,
ioConfig.isUseTransaction()),
+ sequenceMetadata.getCommitterSupplier(stream,
lastPersistedOffsets).get(),
+ Collections.singletonList(sequenceMetadata.getSequenceName())
+ ),
+ (Function<SegmentsAndMetadata, SegmentsAndMetadata>)
publishedSegmentsAndMetadata -> {
+ if (publishedSegmentsAndMetadata == null) {
+ throw new ISE(
+ "Transaction failure publishing segments for sequence [%s]",
+ sequenceMetadata
+ );
+ } else {
+ return publishedSegmentsAndMetadata;
+ }
+ }
+ );
+ publishWaitList.add(publishFuture);
+
+ // Create a handoffFuture for every publishFuture. The created
handoffFuture must fail if publishFuture fails.
+ final SettableFuture<SegmentsAndMetadata> handoffFuture =
SettableFuture.create();
+ handOffWaitList.add(handoffFuture);
+
+ Futures.addCallback(
+ publishFuture,
+ new FutureCallback<SegmentsAndMetadata>()
+ {
+ @Override
+ public void onSuccess(SegmentsAndMetadata
publishedSegmentsAndMetadata)
+ {
+ log.info(
+ "Published segments[%s] with metadata[%s].",
+ publishedSegmentsAndMetadata.getSegments()
+ .stream()
+ .map(DataSegment::getIdentifier)
+ .collect(Collectors.toList()),
+
Preconditions.checkNotNull(publishedSegmentsAndMetadata.getCommitMetadata(),
"commitMetadata")
+ );
+
+ sequences.remove(sequenceMetadata);
+ publishingSequences.remove(sequenceMetadata.getSequenceName());
+ try {
+ persistSequences();
+ }
+ catch (IOException e) {
+ log.error(e, "Unable to persist state, dying");
+ handoffFuture.setException(e);
+ throw new RuntimeException(e);
+ }
+
+ Futures.transform(
+ driver.registerHandoff(publishedSegmentsAndMetadata),
+ new Function<SegmentsAndMetadata, Void>()
+ {
+ @Nullable
+ @Override
+ public Void apply(@Nullable SegmentsAndMetadata
handoffSegmentsAndMetadata)
+ {
+ if (handoffSegmentsAndMetadata == null) {
+ log.warn(
+ "Failed to handoff segments[%s]",
+ publishedSegmentsAndMetadata.getSegments()
+ .stream()
+
.map(DataSegment::getIdentifier)
+
.collect(Collectors.toList())
+ );
+ }
+ handoffFuture.set(handoffSegmentsAndMetadata);
+ return null;
+ }
+ }
+ );
+ }
+
+ @Override
+ public void onFailure(@ParametersAreNonnullByDefault Throwable t)
+ {
+ log.error(t, "Error while publishing segments for sequence[%s]",
sequenceMetadata);
+ handoffFuture.setException(t);
+ }
+ }
+ );
+ }
+
+ private static File getSequencesPersistFile(TaskToolbox toolbox)
+ {
+ return new File(toolbox.getPersistDir(), "sequences.json");
+ }
+
+ private boolean restoreSequences() throws IOException
+ {
+ final File sequencesPersistFile = getSequencesPersistFile(toolbox);
+ if (sequencesPersistFile.exists()) {
+ sequences = new CopyOnWriteArrayList<>(
+ toolbox.getObjectMapper().<List<SequenceMetadata>>readValue(
+ sequencesPersistFile,
+ new TypeReference<List<SequenceMetadata>>()
+ {
+ }
+ )
+ );
+ return true;
+ } else {
+ return false;
+ }
+ }
+
+ private synchronized void persistSequences() throws IOException
+ {
+ log.info("Persisting Sequences Metadata [%s]", sequences);
+ toolbox.getObjectMapper().writerWithType(
+ new TypeReference<List<SequenceMetadata>>()
+ {
+ }
+ ).writeValue(getSequencesPersistFile(toolbox), sequences);
+ }
+
+ private Map<String, TaskReport> getTaskCompletionReports(@Nullable String
errorMsg)
+ {
+ return TaskReport.buildTaskReports(
+ new IngestionStatsAndErrorsTaskReport(
+ task.getId(),
+ new IngestionStatsAndErrorsTaskReportData(
+ ingestionState,
+ getTaskCompletionUnparseableEvents(),
+ getTaskCompletionRowStats(),
+ errorMsg
+ )
+ )
+ );
+ }
+
+ private Map<String, Object> getTaskCompletionUnparseableEvents()
+ {
+ Map<String, Object> unparseableEventsMap = new HashMap<>();
+ List<String> buildSegmentsParseExceptionMessages =
IndexTaskUtils.getMessagesFromSavedParseExceptions(
+ savedParseExceptions
+ );
+ if (buildSegmentsParseExceptionMessages != null) {
+ unparseableEventsMap.put(RowIngestionMeters.BUILD_SEGMENTS,
buildSegmentsParseExceptionMessages);
+ }
+ return unparseableEventsMap;
+ }
+
+ private Map<String, Object> getTaskCompletionRowStats()
+ {
+ Map<String, Object> metrics = new HashMap<>();
+ metrics.put(
+ RowIngestionMeters.BUILD_SEGMENTS,
+ rowIngestionMeters.getTotals()
+ );
+ return metrics;
+ }
+
+
+ private void maybePersistAndPublishSequences(Supplier<Committer>
committerSupplier)
+ throws InterruptedException
+ {
+ for (SequenceMetadata sequenceMetadata : sequences) {
+ sequenceMetadata.updateAssignments(currOffsets);
+ if (!sequenceMetadata.isOpen() &&
!publishingSequences.contains(sequenceMetadata.getSequenceName())) {
+ publishingSequences.add(sequenceMetadata.getSequenceName());
+ try {
+ Object result = driver.persist(committerSupplier.get());
+ log.info(
+ "Persist completed with results: [%s], adding sequence [%s] to
publish queue",
+ result,
+ sequenceMetadata
+ );
+ publishAndRegisterHandoff(sequenceMetadata);
+ }
+ catch (InterruptedException e) {
+ log.warn("Interrupted while persisting sequence [%s]",
sequenceMetadata);
+ throw e;
+ }
+ }
+ }
+ }
+
+ private Set<StreamPartition<PartitionType>> assignPartitions(
+ RecordSupplier<PartitionType, SequenceType> recordSupplier
+ )
+ {
+ final Set<StreamPartition<PartitionType>> assignment = new HashSet<>();
+ for (Map.Entry<PartitionType, SequenceType> entry :
currOffsets.entrySet()) {
+ final SequenceType endOffset = endOffsets.get(entry.getKey());
+ if (OrderedPartitionableRecord.END_OF_SHARD_MARKER.equals(endOffset)
+ || SeekableStreamPartitions.NO_END_SEQUENCE_NUMBER.equals(endOffset)
+ ||
createSequenceNumber(entry.getValue()).compareTo(createSequenceNumber(endOffset))
< 0) {
+ assignment.add(StreamPartition.of(stream, entry.getKey()));
+ } else if (entry.getValue().equals(endOffset)) {
+ log.info("Finished reading partition[%s].", entry.getKey());
+ } else {
+ throw new ISE(
+ "WTF?! Cannot start from sequence[%,d] > endOffset[%,d]",
+ entry.getValue(),
+ endOffset
+ );
+ }
+ }
+
+ recordSupplier.assign(assignment);
+
+ return assignment;
+ }
+
+
+ private void seekToStartingSequence(
+ RecordSupplier<PartitionType, SequenceType> recordSupplier,
Set<StreamPartition<PartitionType>> partitions
+ )
+ {
+ for (final StreamPartition<PartitionType> partition : partitions) {
+ final SequenceType sequence =
currOffsets.get(partition.getPartitionId());
+ log.info("Seeking partition[%s] to sequence[%s].",
partition.getPartitionId(), sequence);
+ recordSupplier.seek(partition, sequence);
+ }
+ }
+
+ /**
+ * Checks if the pauseRequested flag was set and if so blocks:
+ * a) if pauseMillis == PAUSE_FOREVER, until pauseRequested is cleared
+ * b) if pauseMillis != PAUSE_FOREVER, until pauseMillis elapses -or-
pauseRequested is cleared
+ * <p>
+ * If pauseMillis is changed while paused, the new pause timeout will be
applied. This allows adjustment of the
+ * pause timeout (making a timed pause into an indefinite pause and vice
versa is valid) without having to resume
+ * and ensures that the loop continues to stay paused without ingesting any
new events. You will need to signal
+ * shouldResume after adjusting pauseMillis for the new value to take effect.
+ * <p>
+ * Sets paused = true and signals paused so callers can be notified when the
pause command has been accepted.
+ * <p>
+ * Additionally, pauses if all partitions assignments have been read and
pauseAfterRead flag is set.
+ *
+ * @return true if a pause request was handled, false otherwise
+ */
+ private boolean possiblyPause() throws InterruptedException
+ {
+ pauseLock.lockInterruptibly();
+ try {
+ if (pauseRequested) {
+ status = Status.PAUSED;
+ hasPaused.signalAll();
+
+ while (pauseRequested) {
+ log.info("Pausing ingestion until resumed");
+ shouldResume.await();
+ }
+
+ status = Status.READING;
+ shouldResume.signalAll();
+ log.info("Ingestion loop resumed");
+ return true;
+ }
+ }
+ finally {
+ pauseLock.unlock();
+ }
+
+ return false;
+ }
+
+ private void possiblyResetDataSourceMetadata(
+ RecordSupplier<PartitionType, SequenceType> recordSupplier,
+ Set<StreamPartition<PartitionType>> assignment
+ )
+ {
+ for (final StreamPartition<PartitionType> streamPartition : assignment) {
+ SequenceType sequence =
currOffsets.get(streamPartition.getPartitionId());
+ if (!tuningConfig.isSkipSequenceNumberAvailabilityCheck()) {
+ SequenceType earliestSequenceNumber =
recordSupplier.getEarliestSequenceNumber(streamPartition);
+ /*
+ if (earliestSequenceNumber == null) {
+ log.warn(
+ "unable to verify sequence number[%s] availability, unable to
fetch earliest sequence number",
+ sequence
+ );
+ }
+ */
+ if (earliestSequenceNumber == null
+ ||
createSequenceNumber(earliestSequenceNumber).compareTo(createSequenceNumber(sequence))
> 0) {
+ if (tuningConfig.isResetOffsetAutomatically()) {
+ log.info("Attempting to reset sequences automatically for all
partitions");
+ try {
+ sendResetRequestAndWait(
+ assignment.stream()
+ .collect(Collectors.toMap(x -> x, x ->
currOffsets.get(x.getPartitionId()))),
+ toolbox
+ );
+ }
+ catch (IOException e) {
+ throw new ISE(e, "Exception while attempting to automatically
reset sequences");
+ }
+ } else {
+ throw new ISE(
+ "Starting sequenceNumber [%s] is no longer available for
partition [%s] (earliest: [%s]) and resetOffsetAutomatically is not enabled",
+ sequence,
+ streamPartition.getPartitionId(),
+ earliestSequenceNumber
+ );
+ }
+ }
+ }
+ }
+ }
+
+
+ private void handleParseException(ParseException pe,
OrderedPartitionableRecord record)
+ {
+ if (pe.isFromPartiallyValidRow()) {
+ rowIngestionMeters.incrementProcessedWithError();
+ } else {
+ rowIngestionMeters.incrementUnparseable();
+ }
+
+ if (tuningConfig.isLogParseExceptions()) {
+ log.error(
+ pe,
+ "Encountered parse exception on row from partition[%s] sequence[%s]",
+ record.getPartitionId(),
+ record.getSequenceNumber()
+ );
+ }
+
+ if (savedParseExceptions != null) {
+ savedParseExceptions.add(pe);
+ }
+
+ if (rowIngestionMeters.getUnparseable() +
rowIngestionMeters.getProcessedWithError()
+ > tuningConfig.getMaxParseExceptions()) {
+ log.error("Max parse exceptions exceeded, terminating task...");
+ throw new RuntimeException("Max parse exceptions exceeded, terminating
task...");
+ }
+ }
+
+ private boolean isPaused()
+ {
+ return status == Status.PAUSED;
+ }
+
+ private void requestPause()
+ {
+ pauseRequested = true;
+ }
+
+
+ protected void sendResetRequestAndWait(
+ Map<StreamPartition<PartitionType>, SequenceType> outOfRangePartitions,
+ TaskToolbox taskToolbox
+ )
+ throws IOException
+ {
+ Map<PartitionType, SequenceType> partitionOffsetMap = outOfRangePartitions
+ .entrySet().stream().collect(Collectors.toMap(x ->
x.getKey().getPartitionId(), Map.Entry::getValue));
+
+ boolean result = taskToolbox
+ .getTaskActionClient()
+ .submit(
+ new ResetDataSourceMetadataAction(
+ task.getDataSource(),
+ createDataSourceMetadata(
+ new SeekableStreamPartitions<>(
+ ioConfig.getStartPartitions().getStream(),
+ partitionOffsetMap
+ )
+ )
+ )
+ );
+
+ if (result) {
+ log.makeAlert("Resetting sequences for datasource [%s]",
task.getDataSource())
+ .addData("partitions", partitionOffsetMap.keySet())
+ .emit();
+
+ requestPause();
+ } else {
+ log.makeAlert("Failed to send reset request for partitions [%s]",
partitionOffsetMap.keySet()).emit();
+ }
+ }
+
+ /**
+ * Authorizes action to be performed on this task's datasource
+ *
+ * @return authorization result
+ */
+ private Access authorizationCheck(final HttpServletRequest req, Action
action)
+ {
+ return IndexTaskUtils.datasourceAuthorizationCheck(req, action,
task.getDataSource(), authorizerMapper);
+ }
+
+ public Appenderator getAppenderator()
+ {
+ return appenderator;
+ }
@VisibleForTesting
- Map<PartitionType, SequenceType> getCurrentOffsets();
+ public RowIngestionMeters getRowIngestionMeters()
+ {
+ return rowIngestionMeters;
+ }
+
+
+ public void stopGracefully()
+ {
+ log.info("Stopping gracefully (status: [%s])", status);
+ stopRequested.set(true);
+
+ synchronized (statusLock) {
+ if (status == Status.PUBLISHING) {
+ runThread.interrupt();
+ return;
+ }
+ }
+
+ try {
+ if
(pauseLock.tryLock(SeekableStreamIndexTask.LOCK_ACQUIRE_TIMEOUT_SECONDS,
TimeUnit.SECONDS)) {
+ try {
+ if (pauseRequested) {
+ pauseRequested = false;
+ shouldResume.signalAll();
+ }
+ }
+ finally {
+ pauseLock.unlock();
+ }
+ } else {
+ log.warn("While stopping: failed to acquire pauseLock before timeout,
interrupting run thread");
+ runThread.interrupt();
+ return;
+ }
+
+ if
(pollRetryLock.tryLock(SeekableStreamIndexTask.LOCK_ACQUIRE_TIMEOUT_SECONDS,
TimeUnit.SECONDS)) {
+ try {
+ isAwaitingRetry.signalAll();
+ }
+ finally {
+ pollRetryLock.unlock();
+ }
+ } else {
+ log.warn("While stopping: failed to acquire pollRetryLock before
timeout, interrupting run thread");
+ runThread.interrupt();
+ }
+ }
+ catch (Exception e) {
+ Throwables.propagate(e);
+ }
+ }
+
+ @POST
+ @Path("/stop")
+ public Response stop(@Context final HttpServletRequest req)
+ {
+ authorizationCheck(req, Action.WRITE);
+ stopGracefully();
+ return Response.status(Response.Status.OK).build();
+ }
+
+ @GET
+ @Path("/status")
+ @Produces(MediaType.APPLICATION_JSON)
+ public Status getStatusHTTP(@Context final HttpServletRequest req)
+ {
+ authorizationCheck(req, Action.READ);
+ return status;
+ }
@VisibleForTesting
- Map<PartitionType, SequenceType> getEndOffsets();
+ public Status getStatus()
+ {
+ return status;
+ }
+
+ @GET
+ @Path("/offsets/current")
+ @Produces(MediaType.APPLICATION_JSON)
+ public Map<PartitionType, SequenceType> getCurrentOffsets(@Context final
HttpServletRequest req)
+ {
+ authorizationCheck(req, Action.READ);
+ return getCurrentOffsets();
+ }
+
+ public Map<PartitionType, SequenceType> getCurrentOffsets()
+ {
+ return currOffsets;
+ }
+
+ @GET
+ @Path("/offsets/end")
+ @Produces(MediaType.APPLICATION_JSON)
+ public Map<PartitionType, SequenceType> getEndOffsetsHTTP(@Context final
HttpServletRequest req)
+ {
+ authorizationCheck(req, Action.READ);
+ return getEndOffsets();
+ }
+
+ public Map<PartitionType, SequenceType> getEndOffsets()
+ {
+ return endOffsets;
+ }
+
+ @POST
+ @Path("/offsets/end")
+ @Consumes(MediaType.APPLICATION_JSON)
+ @Produces(MediaType.APPLICATION_JSON)
+ public Response setEndOffsetsHTTP(
+ Map<PartitionType, SequenceType> sequences,
+ @QueryParam("finish") @DefaultValue("true") final boolean finish,
+ // this field is only for internal purposes, shouldn't be usually set by
users
+ @Context final HttpServletRequest req
+ ) throws InterruptedException
+ {
+ authorizationCheck(req, Action.WRITE);
+ return setEndOffsets(sequences, finish);
+ }
+
+ @GET
+ @Path("/rowStats")
+ @Produces(MediaType.APPLICATION_JSON)
+ public Response getRowStats(
+ @Context final HttpServletRequest req
+ )
+ {
+ authorizationCheck(req, Action.READ);
+ Map<String, Object> returnMap = new HashMap<>();
+ Map<String, Object> totalsMap = new HashMap<>();
+ Map<String, Object> averagesMap = new HashMap<>();
+
+ totalsMap.put(
+ RowIngestionMeters.BUILD_SEGMENTS,
+ rowIngestionMeters.getTotals()
+ );
+ averagesMap.put(
+ RowIngestionMeters.BUILD_SEGMENTS,
+ rowIngestionMeters.getMovingAverages()
+ );
+
+ returnMap.put("movingAverages", averagesMap);
+ returnMap.put("totals", totalsMap);
+ return Response.ok(returnMap).build();
+ }
+
+ @GET
+ @Path("/unparseableEvents")
+ @Produces(MediaType.APPLICATION_JSON)
+ public Response getUnparseableEvents(
+ @Context final HttpServletRequest req
+ )
+ {
+ authorizationCheck(req, Action.READ);
+ List<String> events =
IndexTaskUtils.getMessagesFromSavedParseExceptions(savedParseExceptions);
+ return Response.ok(events).build();
+ }
@VisibleForTesting
- Response setEndOffsets(
- Map<PartitionType, SequenceType> offsets,
+ public Response setEndOffsets(
+ Map<PartitionType, SequenceType> sequenceNumbers,
boolean finish // this field is only for internal purposes, shouldn't be
usually set by users
- ) throws InterruptedException;
+ ) throws InterruptedException
+ {
+ if (sequenceNumbers == null) {
+ return Response.status(Response.Status.BAD_REQUEST)
+ .entity("Request body must contain a map of {
partition:endOffset }")
+ .build();
+ } else if (!endOffsets.keySet().containsAll(sequenceNumbers.keySet())) {
+ return Response.status(Response.Status.BAD_REQUEST)
+ .entity(
+ StringUtils.format(
+ "Request contains partitions not being handled by
this task, my partitions: %s",
+ endOffsets.keySet()
+ )
+ )
+ .build();
+ } else {
+ try {
+ pauseLock.lockInterruptibly();
+ // Perform all sequence related checks before checking for isPaused()
+ // and after acquiring pauseLock to correctly guard against duplicate
requests
+ Preconditions.checkState(sequenceNumbers.size() > 0, "WTH?! No
Sequences found to set end sequences");
+
+ final SequenceMetadata latestSequence = sequences.get(sequences.size()
- 1);
+ // if a partition has not been read yet (contained in
initialOffsetsSnapshot), then
+ // do not mark the starting sequence number as exclusive
+ Set<PartitionType> exclusivePartitions = sequenceNumbers.keySet()
+ .stream()
+ .filter(x ->
!initialOffsetsSnapshot.containsKey(x)
+
|| ioConfig.getExclusiveStartSequenceNumberPartitions()
+
.contains(x))
+
.collect(Collectors.toSet());
+
+ if ((latestSequence.getStartOffsets().equals(sequenceNumbers) &&
latestSequence.exclusiveStartPartitions.equals(
+ exclusivePartitions) && !finish) ||
+ (latestSequence.getEndOffsets().equals(sequenceNumbers) &&
finish)) {
+ log.warn("Ignoring duplicate request, end sequences already set for
sequences [%s]", sequenceNumbers);
+ return Response.ok(sequenceNumbers).build();
+ } else if (latestSequence.isCheckpointed()) {
+ return Response.status(Response.Status.BAD_REQUEST)
+ .entity(StringUtils.format(
+ "WTH?! Sequence [%s] has already endOffsets set,
cannot set to [%s]",
+ latestSequence,
+ sequenceNumbers
+ )).build();
+ } else if (!isPaused()) {
+ return Response.status(Response.Status.BAD_REQUEST)
+ .entity("Task must be paused before changing the end
sequences")
+ .build();
+ }
+
+ for (Map.Entry<PartitionType, SequenceType> entry :
sequenceNumbers.entrySet()) {
+ if
(createSequenceNumber(entry.getValue()).compareTo(createSequenceNumber(currOffsets.get(entry.getKey())))
+ < 0) {
+ return Response.status(Response.Status.BAD_REQUEST)
+ .entity(
+ StringUtils.format(
+ "End sequence must be >= current sequence
for partition [%s] (current: %s)",
+ entry.getKey(),
+ currOffsets.get(entry.getKey())
+ )
+ )
+ .build();
+ }
+ }
+
+ resetNextCheckpointTime();
+ latestSequence.setEndOffsets(sequenceNumbers);
+
+ if (finish) {
+ log.info("Updating endOffsets from [%s] to [%s]", endOffsets,
sequenceNumbers);
+ endOffsets.putAll(sequenceNumbers);
+ } else {
+ exclusiveStartingPartitions.addAll(exclusivePartitions);
+
+ // create new sequence
+ final SequenceMetadata newSequence = createSequenceMetaData(
+ latestSequence.getSequenceId() + 1,
+ StringUtils.format("%s_%d", ioConfig.getBaseSequenceName(),
latestSequence.getSequenceId() + 1),
+ sequenceNumbers,
+ endOffsets,
+ false,
+ exclusivePartitions
+ );
+ sequences.add(newSequence);
+ initialOffsetsSnapshot.putAll(sequenceNumbers);
+ }
+ persistSequences();
+ }
+ catch (Exception e) {
+ log.error(e, "Unable to set end sequences, dying");
+ backgroundThreadException = e;
+ // should resume to immediately finish kafka index task as failed
+ resume();
+ return Response.status(Response.Status.INTERNAL_SERVER_ERROR)
+ .entity(Throwables.getStackTraceAsString(e))
+ .build();
+ }
+ finally {
+ pauseLock.unlock();
+ }
+ }
+
+ resume();
+
+ return Response.ok(sequenceNumbers).build();
+ }
+
+ private void resetNextCheckpointTime()
+ {
+ nextCheckpointTime =
DateTimes.nowUtc().plus(tuningConfig.getIntermediateHandoffPeriod()).getMillis();
+ }
+
+ @GET
+ @Path("/checkpoints")
+ @Produces(MediaType.APPLICATION_JSON)
+ public Map<Integer, Map<PartitionType, SequenceType>>
getCheckpointsHTTP(@Context final HttpServletRequest req)
+ {
+ authorizationCheck(req, Action.READ);
+ return getCheckpoints();
+ }
+
+ private Map<Integer, Map<PartitionType, SequenceType>> getCheckpoints()
+ {
+ return new TreeMap<>(sequences.stream()
+ .collect(Collectors.toMap(
+ SequenceMetadata::getSequenceId,
+ SequenceMetadata::getStartOffsets
+ )));
+ }
+
+ /**
+ * Signals the ingestion loop to pause.
+ *
+ * @return one of the following Responses: 400 Bad Request if the task has
started publishing; 202 Accepted if the
+ * method has timed out and returned before the task has paused; 200 OK with
a map of the current partition sequences
+ * in the response body if the task successfully paused
+ */
+ @POST
+ @Path("/pause")
+ @Produces(MediaType.APPLICATION_JSON)
+ public Response pauseHTTP(
+ @Context final HttpServletRequest req
+ ) throws InterruptedException
+ {
+ authorizationCheck(req, Action.WRITE);
+ return pause();
+ }
@VisibleForTesting
- Response pause() throws InterruptedException;
+ public Response pause() throws InterruptedException
+ {
+ if (!(status == Status.PAUSED || status == Status.READING)) {
+ return Response.status(Response.Status.BAD_REQUEST)
+ .entity(StringUtils.format("Can't pause, task is not in a
pausable state (state: [%s])", status))
+ .build();
+ }
+
+ pauseLock.lockInterruptibly();
+ try {
+ pauseRequested = true;
+
+ pollRetryLock.lockInterruptibly();
+ try {
+ isAwaitingRetry.signalAll();
+ }
+ finally {
+ pollRetryLock.unlock();
+ }
+
+ if (isPaused()) {
+ shouldResume.signalAll(); // kick the monitor so it re-awaits with the
new pauseMillis
+ }
+
+ long nanos = TimeUnit.SECONDS.toNanos(2);
+ while (!isPaused()) {
+ if (nanos <= 0L) {
+ return Response.status(Response.Status.ACCEPTED)
+ .entity("Request accepted but task has not yet
paused")
+ .build();
+ }
+ nanos = hasPaused.awaitNanos(nanos);
+ }
+
Review comment:
is this needed because `exclusiveStartingPartitions` will not be empty for
Kafka when initial offsets are fetched from metadata storage
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