@Override
public TaskStatus call() {
final long startTime = System.currentTimeMillis();
final File taskDir = toolbox.getTaskWorkDir();
TaskStatus status;
try {
log.info("Running task: %s", task.getId());
status = task.run(toolbox);
} catch (InterruptedException e) {
log.error(e, "Interrupted while running task[%s]", task);
throw Throwables.propagate(e);
} catch (Exception e) {
log.error(e, "Exception while running task[%s]", task);
status = TaskStatus.failure(task.getId());
} catch (Throwable t) {
log.error(t, "Uncaught Throwable while running task[%s]", task);
throw Throwables.propagate(t);
}
try {
if (taskDir.exists()) {
log.info("Removing task directory: %s", taskDir);
FileUtils.deleteDirectory(taskDir);
}
} catch (Exception e) {
log.makeAlert(e, "Failed to delete task directory")
.addData("taskDir", taskDir.toString())
.addData("task", task.getId())
.emit();
}
try {
return status.withDuration(System.currentTimeMillis() - startTime);
} catch (Exception e) {
log.error(e, "Uncaught Exception during callback for task[%s]", task);
throw Throwables.propagate(e);
}
}
@Override
public TaskStatus run(final TaskToolbox toolbox) throws Exception {
if (this.plumber != null) {
throw new IllegalStateException("WTF?!? run with non-null plumber??!");
}
// Shed any locks we might have (e.g. if we were uncleanly killed and restarted) since we'll
// reacquire
// them if we actually need them
for (final TaskLock taskLock : getTaskLocks(toolbox)) {
toolbox.getTaskActionClient().submit(new LockReleaseAction(taskLock.getInterval()));
}
boolean normalExit = true;
// Set up firehose
final Period intermediatePersistPeriod = fireDepartmentConfig.getIntermediatePersistPeriod();
final Firehose firehose = firehoseFactory.connect();
// It would be nice to get the PlumberSchool in the constructor. Although that will need
// jackson injectables for
// stuff like the ServerView, which seems kind of odd? Perhaps revisit this when Guice has been
// introduced.
final RealtimePlumberSchool realtimePlumberSchool =
new RealtimePlumberSchool(
windowPeriod, new File(toolbox.getTaskWorkDir(), "persist"), segmentGranularity);
realtimePlumberSchool.setDefaultMaxPendingPersists(maxPendingPersists);
final SegmentPublisher segmentPublisher = new TaskActionSegmentPublisher(this, toolbox);
// NOTE: We talk to the coordinator in various places in the plumber and we could be more robust
// to issues
// with the coordinator. Right now, we'll block/throw in whatever thread triggered the
// coordinator behavior,
// which will typically be either the main data processing loop or the persist thread.
// Wrap default DataSegmentAnnouncer such that we unlock intervals as we unannounce segments
final DataSegmentAnnouncer lockingSegmentAnnouncer =
new DataSegmentAnnouncer() {
@Override
public void announceSegment(final DataSegment segment) throws IOException {
// Side effect: Calling announceSegment causes a lock to be acquired
toolbox.getTaskActionClient().submit(new LockAcquireAction(segment.getInterval()));
toolbox.getSegmentAnnouncer().announceSegment(segment);
}
@Override
public void unannounceSegment(final DataSegment segment) throws IOException {
try {
toolbox.getSegmentAnnouncer().unannounceSegment(segment);
} finally {
toolbox.getTaskActionClient().submit(new LockReleaseAction(segment.getInterval()));
}
}
@Override
public void announceSegments(Iterable<DataSegment> segments) throws IOException {
// Side effect: Calling announceSegments causes locks to be acquired
for (DataSegment segment : segments) {
toolbox.getTaskActionClient().submit(new LockAcquireAction(segment.getInterval()));
}
toolbox.getSegmentAnnouncer().announceSegments(segments);
}
@Override
public void unannounceSegments(Iterable<DataSegment> segments) throws IOException {
try {
toolbox.getSegmentAnnouncer().unannounceSegments(segments);
} finally {
for (DataSegment segment : segments) {
toolbox.getTaskActionClient().submit(new LockReleaseAction(segment.getInterval()));
}
}
}
};
// NOTE: getVersion will block if there is lock contention, which will block plumber.getSink
// NOTE: (and thus the firehose)
// Shouldn't usually happen, since we don't expect people to submit tasks that intersect with
// the
// realtime window, but if they do it can be problematic. If we decide to care, we can use more
// threads in
// the plumber such that waiting for the coordinator doesn't block data processing.
final VersioningPolicy versioningPolicy =
new VersioningPolicy() {
@Override
public String getVersion(final Interval interval) {
try {
// Side effect: Calling getVersion causes a lock to be acquired
final TaskLock myLock =
toolbox.getTaskActionClient().submit(new LockAcquireAction(interval));
return myLock.getVersion();
} catch (IOException e) {
throw Throwables.propagate(e);
}
}
};
// NOTE: This pusher selects path based purely on global configuration and the DataSegment,
// which means
// NOTE: that redundant realtime tasks will upload to the same location. This can cause
// index.zip and
// NOTE: descriptor.json to mismatch, or it can cause historical nodes to load different
// instances of the
// NOTE: "same" segment.
realtimePlumberSchool.setDataSegmentPusher(toolbox.getSegmentPusher());
realtimePlumberSchool.setConglomerate(toolbox.getQueryRunnerFactoryConglomerate());
realtimePlumberSchool.setQueryExecutorService(toolbox.getQueryExecutorService());
realtimePlumberSchool.setVersioningPolicy(versioningPolicy);
realtimePlumberSchool.setSegmentAnnouncer(lockingSegmentAnnouncer);
realtimePlumberSchool.setSegmentPublisher(segmentPublisher);
realtimePlumberSchool.setServerView(toolbox.getNewSegmentServerView());
realtimePlumberSchool.setEmitter(toolbox.getEmitter());
if (this.rejectionPolicyFactory != null) {
realtimePlumberSchool.setRejectionPolicyFactory(rejectionPolicyFactory);
}
final FireDepartment fireDepartment =
new FireDepartment(schema, fireDepartmentConfig, null, null);
final RealtimeMetricsMonitor metricsMonitor =
new RealtimeMetricsMonitor(ImmutableList.of(fireDepartment));
this.queryRunnerFactoryConglomerate = toolbox.getQueryRunnerFactoryConglomerate();
this.plumber = realtimePlumberSchool.findPlumber(schema, fireDepartment.getMetrics());
try {
plumber.startJob();
// Set up metrics emission
toolbox.getMonitorScheduler().addMonitor(metricsMonitor);
// Time to read data!
long nextFlush = new DateTime().plus(intermediatePersistPeriod).getMillis();
while (firehose.hasMore()) {
final InputRow inputRow;
try {
inputRow = firehose.nextRow();
if (inputRow == null) {
continue;
}
final Sink sink = plumber.getSink(inputRow.getTimestampFromEpoch());
if (sink == null) {
fireDepartment.getMetrics().incrementThrownAway();
log.debug("Throwing away event[%s]", inputRow);
if (System.currentTimeMillis() > nextFlush) {
plumber.persist(firehose.commit());
nextFlush = new DateTime().plus(intermediatePersistPeriod).getMillis();
}
continue;
}
if (sink.isEmpty()) {
log.info("Task %s: New sink: %s", getId(), sink);
}
int currCount = sink.add(inputRow);
fireDepartment.getMetrics().incrementProcessed();
if (currCount >= fireDepartmentConfig.getMaxRowsInMemory()
|| System.currentTimeMillis() > nextFlush) {
plumber.persist(firehose.commit());
nextFlush = new DateTime().plus(intermediatePersistPeriod).getMillis();
}
} catch (FormattedException e) {
log.warn(e, "unparseable line");
fireDepartment.getMetrics().incrementUnparseable();
}
}
} catch (Throwable e) {
normalExit = false;
log.makeAlert(e, "Exception aborted realtime processing[%s]", schema.getDataSource()).emit();
throw e;
} finally {
if (normalExit) {
try {
plumber.persist(firehose.commit());
plumber.finishJob();
} catch (Exception e) {
log.makeAlert(e, "Failed to finish realtime task").emit();
} finally {
Closeables.closeQuietly(firehose);
toolbox.getMonitorScheduler().removeMonitor(metricsMonitor);
}
}
}
return TaskStatus.success(getId());
}