Ejemplo n.º 1
1
  @Override
  public void handle(TaskSchedulerEvent event) {
    if (event.getType() == EventType.T_SCHEDULE) {
      if (event instanceof FragmentScheduleEvent) {
        FragmentScheduleEvent castEvent = (FragmentScheduleEvent) event;
        if (context.isLeafQuery()) {
          TaskAttemptScheduleContext taskContext = new TaskAttemptScheduleContext();
          Task task = Stage.newEmptyTask(context, taskContext, stage, nextTaskId++);
          task.addFragment(castEvent.getLeftFragment(), true);
          scheduledObjectNum++;
          if (castEvent.hasRightFragments()) {
            task.addFragments(castEvent.getRightFragments());
          }
          stage.getEventHandler().handle(new TaskEvent(task.getId(), TaskEventType.T_SCHEDULE));
        } else {
          fragmentsForNonLeafTask = new FileFragment[2];
          fragmentsForNonLeafTask[0] = castEvent.getLeftFragment();
          if (castEvent.hasRightFragments()) {
            Collection<Fragment> var = castEvent.getRightFragments();
            FileFragment[] rightFragments = var.toArray(new FileFragment[var.size()]);
            fragmentsForNonLeafTask[1] = rightFragments[0];
            if (rightFragments.length > 1) {
              broadcastFragmentsForNonLeafTask = new FileFragment[rightFragments.length - 1];
              System.arraycopy(
                  rightFragments,
                  1,
                  broadcastFragmentsForNonLeafTask,
                  0,
                  broadcastFragmentsForNonLeafTask.length);
            } else {
              broadcastFragmentsForNonLeafTask = null;
            }
          }
        }
      } else if (event instanceof FetchScheduleEvent) {
        FetchScheduleEvent castEvent = (FetchScheduleEvent) event;
        Map<String, List<FetchImpl>> fetches = castEvent.getFetches();
        TaskAttemptScheduleContext taskScheduleContext = new TaskAttemptScheduleContext();
        Task task = Stage.newEmptyTask(context, taskScheduleContext, stage, nextTaskId++);
        scheduledObjectNum++;
        for (Entry<String, List<FetchImpl>> eachFetch : fetches.entrySet()) {
          task.addFetches(eachFetch.getKey(), eachFetch.getValue());
          task.addFragment(fragmentsForNonLeafTask[0], true);
          if (fragmentsForNonLeafTask[1] != null) {
            task.addFragment(fragmentsForNonLeafTask[1], true);
          }
        }
        if (broadcastFragmentsForNonLeafTask != null
            && broadcastFragmentsForNonLeafTask.length > 0) {
          task.addFragments(Arrays.asList(broadcastFragmentsForNonLeafTask));
        }
        stage.getEventHandler().handle(new TaskEvent(task.getId(), TaskEventType.T_SCHEDULE));
      } else if (event instanceof TaskAttemptToSchedulerEvent) {
        TaskAttemptToSchedulerEvent castEvent = (TaskAttemptToSchedulerEvent) event;
        if (context.isLeafQuery()) {
          scheduledRequests.addLeafTask(castEvent);
        } else {
          scheduledRequests.addNonLeafTask(castEvent);
        }

        if (needWakeup.getAndSet(false)) {
          // wake up scheduler thread after scheduled
          synchronized (schedulingThread) {
            schedulingThread.notifyAll();
          }
        }
      }
    } else if (event.getType() == EventType.T_SCHEDULE_CANCEL) {
      // when a stage is killed, unassigned query unit attmpts are canceled from the scheduler.
      // This event is triggered by TaskAttempt.
      TaskAttemptToSchedulerEvent castedEvent = (TaskAttemptToSchedulerEvent) event;
      scheduledRequests.leafTasks.remove(castedEvent.getTaskAttempt().getId());
      LOG.info(
          castedEvent.getTaskAttempt().getId()
              + " is canceled from "
              + this.getClass().getSimpleName());
      ((TaskAttemptToSchedulerEvent) event)
          .getTaskAttempt()
          .handle(
              new TaskAttemptEvent(
                  castedEvent.getTaskAttempt().getId(), TaskAttemptEventType.TA_SCHEDULE_CANCELED));
    }
  }
Ejemplo n.º 2
0
  protected LinkedList<TaskRequestEvent> createTaskRequest(final int incompleteTaskNum)
      throws Exception {
    LinkedList<TaskRequestEvent> taskRequestEvents = new LinkedList<>();

    // If scheduled tasks is long-term task, cluster resource can be the worst load balance.
    // This part is to throttle the maximum required container per request
    int requestContainerNum = Math.min(incompleteTaskNum, maximumRequestContainer);
    if (LOG.isDebugEnabled()) {
      LOG.debug("Try to schedule task resources: " + requestContainerNum);
    }

    ServiceTracker serviceTracker =
        context.getMasterContext().getQueryMasterContext().getWorkerContext().getServiceTracker();
    NettyClientBase tmClient =
        RpcClientManager.getInstance()
            .getClient(
                serviceTracker.getUmbilicalAddress(),
                QueryCoordinatorProtocol.class,
                true,
                rpcParams);
    QueryCoordinatorProtocolService masterClientService = tmClient.getStub();

    CallFuture<NodeResourceResponse> callBack = new CallFuture<>();
    NodeResourceRequest.Builder request = NodeResourceRequest.newBuilder();
    request
        .setCapacity(NodeResources.createResource(minTaskMemory, isLeaf ? 1 : 0).getProto())
        .setNumContainers(requestContainerNum)
        .setPriority(stage.getPriority())
        .setQueryId(context.getMasterContext().getQueryId().getProto())
        .setType(isLeaf ? ResourceType.LEAF : ResourceType.INTERMEDIATE)
        .setUserId(context.getMasterContext().getQueryContext().getUser())
        .setRunningTasks(stage.getTotalScheduledObjectsCount() - stage.getCompletedTaskCount())
        .addAllCandidateNodes(candidateWorkers)
        .setQueue(
            context.getMasterContext().getQueryContext().get("queue", "default")); // TODO set queue

    masterClientService.reserveNodeResources(callBack.getController(), request.build(), callBack);
    NodeResourceResponse response =
        callBack.get(RpcConstants.FUTURE_TIMEOUT_SECONDS_DEFAULT, TimeUnit.SECONDS);

    for (AllocationResourceProto resource : response.getResourceList()) {
      taskRequestEvents.add(
          new TaskRequestEvent(resource.getWorkerId(), resource, context.getBlockId()));
    }

    return taskRequestEvents;
  }
Ejemplo n.º 3
0
  private Set<Integer> getWorkerIds(Collection<String> hosts) {
    Set<Integer> workerIds = Sets.newHashSet();
    if (hosts.isEmpty()) return workerIds;

    for (WorkerConnectionInfo worker : stage.getContext().getWorkerMap().values()) {
      if (hosts.contains(worker.getHost())) {
        workerIds.add(worker.getId());
      }
    }
    return workerIds;
  }
Ejemplo n.º 4
0
  @Override
  public void init(Configuration conf) {
    tajoConf = TUtil.checkTypeAndGet(conf, TajoConf.class);
    rpcParams = RpcParameterFactory.get(new TajoConf());

    scheduledRequests = new ScheduledRequests();
    minTaskMemory = tajoConf.getIntVar(TajoConf.ConfVars.TASK_RESOURCE_MINIMUM_MEMORY);
    schedulerDelay = tajoConf.getIntVar(TajoConf.ConfVars.QUERYMASTER_TASK_SCHEDULER_DELAY);
    isLeaf = stage.getMasterPlan().isLeaf(stage.getBlock());

    this.schedulingThread =
        new Thread() {
          public void run() {

            while (!isStopped && !Thread.currentThread().isInterrupted()) {

              try {
                schedule();
              } catch (InterruptedException e) {
                if (isStopped) {
                  break;
                } else {
                  LOG.fatal(e.getMessage(), e);
                  stage.abort(StageState.ERROR);
                }
              } catch (Throwable e) {
                LOG.fatal(e.getMessage(), e);
                stage.abort(StageState.ERROR);
                break;
              }
            }
            LOG.info("TaskScheduler schedulingThread stopped");
          }
        };
    super.init(conf);
  }
Ejemplo n.º 5
0
  @Override
  public void start() {
    LOG.info("Start TaskScheduler");
    maximumRequestContainer =
        tajoConf.getInt(REQUEST_MAX_NUM, stage.getContext().getWorkerMap().size() * 2);

    if (isLeaf) {
      candidateWorkers.addAll(getWorkerIds(getLeafTaskHosts()));
    } else {
      // find assigned hosts for Non-Leaf locality in children executionBlock
      List<ExecutionBlock> executionBlockList = stage.getMasterPlan().getChilds(stage.getBlock());
      for (ExecutionBlock executionBlock : executionBlockList) {
        Stage childStage = stage.getContext().getStage(executionBlock.getId());
        candidateWorkers.addAll(childStage.getAssignedWorkerMap().keySet());
      }
    }

    this.schedulingThread.start();
    super.start();
  }