private synchronized void checkTaskCompletion() {
if (taskStateMachine.getState().isDone()) {
return;
}
// are there more partition splits expected?
if (partitionedDriverFactory != null && !partitionedDriverFactory.isNoMoreSplits()) {
return;
}
// do we still have running tasks?
if (remainingDrivers.get() != 0) {
return;
}
// no more output will be created
sharedBuffer.finish();
// are there still pages in the output buffer
if (!sharedBuffer.isFinished()) {
return;
}
// Cool! All done!
taskStateMachine.finished();
}
@Override
public synchronized void addResultQueue(OutputBuffers outputBuffers) {
checkNotNull(outputBuffers, "outputBuffers is null");
try (SetThreadName setThreadName = new SetThreadName("Task-%s", taskId)) {
sharedBuffer.setOutputBuffers(outputBuffers);
}
}
@Override
public BufferResult getResults(
String outputId, long startingSequenceId, DataSize maxSize, Duration maxWait)
throws InterruptedException {
checkNotNull(outputId, "outputId is null");
checkArgument(maxSize.toBytes() > 0, "maxSize must be at least 1 byte");
checkNotNull(maxWait, "maxWait is null");
checkState(
!Thread.holdsLock(this),
"Can not get result data while holding a lock on the %s",
getClass().getSimpleName());
try (SetThreadName setThreadName = new SetThreadName("Task-%s", taskId)) {
return sharedBuffer.get(outputId, startingSequenceId, maxSize, maxWait);
}
}
@Override
public TaskInfo getTaskInfo(boolean full) {
try (SetThreadName setThreadName = new SetThreadName("Task-%s", taskId)) {
checkTaskCompletion();
TaskState state = taskStateMachine.getState();
List<ExecutionFailureInfo> failures = ImmutableList.of();
if (state == TaskState.FAILED) {
failures = toFailures(taskStateMachine.getFailureCauses());
}
return new TaskInfo(
taskStateMachine.getTaskId(),
nextTaskInfoVersion.getAndIncrement(),
state,
location,
lastHeartbeat.get(),
sharedBuffer.getInfo(),
getNoMoreSplits(),
taskContext.getTaskStats(),
failures);
}
}
@Override
public void abortResults(String outputId) {
try (SetThreadName setThreadName = new SetThreadName("Task-%s", taskId)) {
sharedBuffer.abort(outputId);
}
}
private SqlTaskExecution(
Session session,
TaskId taskId,
URI location,
PlanFragment fragment,
OutputBuffers outputBuffers,
LocalExecutionPlanner planner,
DataSize maxBufferSize,
TaskExecutor taskExecutor,
DataSize maxTaskMemoryUsage,
DataSize operatorPreAllocatedMemory,
QueryMonitor queryMonitor,
Executor notificationExecutor,
boolean cpuTimerEnabled) {
try (SetThreadName setThreadName = new SetThreadName("Task-%s", taskId)) {
this.taskId = checkNotNull(taskId, "taskId is null");
this.location = checkNotNull(location, "location is null");
this.taskExecutor = checkNotNull(taskExecutor, "driverExecutor is null");
this.notificationExecutor =
checkNotNull(notificationExecutor, "notificationExecutor is null");
this.taskStateMachine = new TaskStateMachine(taskId, notificationExecutor);
taskStateMachine.addStateChangeListener(
new StateChangeListener<TaskState>() {
@Override
public void stateChanged(TaskState taskState) {
if (taskState.isDone()) {
SqlTaskExecution.this.taskExecutor.removeTask(taskHandle);
// make sure buffers are cleaned up
if (taskState != TaskState.FAILED) {
// don't close buffers for a failed query
// closed buffers signal to upstream tasks that everything finished cleanly
sharedBuffer.destroy();
}
}
}
});
this.taskContext =
new TaskContext(
taskStateMachine,
notificationExecutor,
session,
checkNotNull(maxTaskMemoryUsage, "maxTaskMemoryUsage is null"),
checkNotNull(operatorPreAllocatedMemory, "operatorPreAllocatedMemory is null"),
cpuTimerEnabled);
this.sharedBuffer =
new SharedBuffer(
taskId,
notificationExecutor,
checkNotNull(maxBufferSize, "maxBufferSize is null"),
outputBuffers);
sharedBuffer.addStateChangeListener(
new StateChangeListener<QueueState>() {
@Override
public void stateChanged(QueueState taskState) {
if (taskState == QueueState.FINISHED) {
checkTaskCompletion();
}
}
});
this.queryMonitor = checkNotNull(queryMonitor, "queryMonitor is null");
taskHandle = taskExecutor.addTask(taskId);
LocalExecutionPlan localExecutionPlan =
planner.plan(
session,
fragment.getRoot(),
fragment.getSymbols(),
new TaskOutputFactory(sharedBuffer));
List<DriverFactory> driverFactories = localExecutionPlan.getDriverFactories();
// index driver factories
DriverSplitRunnerFactory partitionedDriverFactory = null;
ImmutableList.Builder<DriverSplitRunnerFactory> unpartitionedDriverFactories =
ImmutableList.builder();
for (DriverFactory driverFactory : driverFactories) {
if (driverFactory.getSourceIds().contains(fragment.getPartitionedSource())) {
checkState(
partitionedDriverFactory == null, "multiple partitioned sources are not supported");
partitionedDriverFactory = new DriverSplitRunnerFactory(driverFactory);
} else {
unpartitionedDriverFactories.add(new DriverSplitRunnerFactory(driverFactory));
}
}
this.unpartitionedDriverFactories = unpartitionedDriverFactories.build();
if (fragment.getDistribution() == PlanDistribution.SOURCE) {
checkArgument(
partitionedDriverFactory != null,
"Fragment is partitioned, but no partitioned driver found");
}
this.partitionedSourceId = fragment.getPartitionedSource();
this.partitionedDriverFactory = partitionedDriverFactory;
}
}
private SqlTaskExecution(
TaskStateMachine taskStateMachine,
TaskContext taskContext,
SharedBuffer sharedBuffer,
PlanFragment fragment,
LocalExecutionPlanner planner,
TaskExecutor taskExecutor,
QueryMonitor queryMonitor,
Executor notificationExecutor) {
this.taskStateMachine = checkNotNull(taskStateMachine, "taskStateMachine is null");
this.taskId = taskStateMachine.getTaskId();
this.taskContext = checkNotNull(taskContext, "taskContext is null");
this.sharedBuffer = checkNotNull(sharedBuffer, "sharedBuffer is null");
this.taskExecutor = checkNotNull(taskExecutor, "driverExecutor is null");
this.notificationExecutor = checkNotNull(notificationExecutor, "notificationExecutor is null");
this.queryMonitor = checkNotNull(queryMonitor, "queryMonitor is null");
try (SetThreadName ignored = new SetThreadName("Task-%s", taskId)) {
List<DriverFactory> driverFactories;
try {
OutputFactory outputOperatorFactory;
if (fragment.getOutputPartitioning() == OutputPartitioning.NONE) {
outputOperatorFactory = new TaskOutputFactory(sharedBuffer);
} else if (fragment.getOutputPartitioning() == OutputPartitioning.HASH) {
outputOperatorFactory = new PartitionedOutputFactory(sharedBuffer);
} else {
throw new PrestoException(
NOT_SUPPORTED,
format("OutputPartitioning %s is not supported", fragment.getOutputPartitioning()));
}
LocalExecutionPlan localExecutionPlan =
planner.plan(
taskContext.getSession(),
fragment.getRoot(),
fragment.getOutputLayout(),
fragment.getSymbols(),
fragment.getDistribution(),
outputOperatorFactory);
driverFactories = localExecutionPlan.getDriverFactories();
} catch (Throwable e) {
// planning failed
taskStateMachine.failed(e);
throw Throwables.propagate(e);
}
// index driver factories
DriverSplitRunnerFactory partitionedDriverFactory = null;
ImmutableList.Builder<DriverSplitRunnerFactory> unpartitionedDriverFactories =
ImmutableList.builder();
for (DriverFactory driverFactory : driverFactories) {
if (driverFactory.getSourceIds().contains(fragment.getPartitionedSource())) {
checkState(
partitionedDriverFactory == null, "multiple partitioned sources are not supported");
partitionedDriverFactory = new DriverSplitRunnerFactory(driverFactory);
} else {
unpartitionedDriverFactories.add(new DriverSplitRunnerFactory(driverFactory));
}
}
this.unpartitionedDriverFactories = unpartitionedDriverFactories.build();
if (fragment.getDistribution() == PlanDistribution.SOURCE) {
checkArgument(
partitionedDriverFactory != null,
"Fragment is partitioned, but no partitioned driver found");
}
this.partitionedSourceId = fragment.getPartitionedSource();
this.partitionedDriverFactory = partitionedDriverFactory;
// don't register the task if it is already completed (most likely failed during planning
// above)
if (!taskStateMachine.getState().isDone()) {
taskHandle = taskExecutor.addTask(taskId);
taskStateMachine.addStateChangeListener(
new RemoveTaskHandleWhenDone(taskExecutor, taskHandle));
} else {
taskHandle = null;
}
sharedBuffer.addStateChangeListener(
new CheckTaskCompletionOnBufferFinish(SqlTaskExecution.this));
}
}