Examples with TaskAttemptEvent org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptEvent used on opensource projects

Example 61 with TaskAttemptEvent

use of org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptEvent in project hadoop by apache.

the class TestSpeculativeExecutionWithMRApp method testSpeculateSuccessfulWithoutUpdateEvents.

@Test
public void testSpeculateSuccessfulWithoutUpdateEvents() throws Exception {
    Clock actualClock = SystemClock.getInstance();
    final ControlledClock clock = new ControlledClock(actualClock);
    clock.setTime(System.currentTimeMillis());
    MRApp app = new MRApp(NUM_MAPPERS, NUM_REDUCERS, false, "test", true, clock);
    Job job = app.submit(new Configuration(), true, true);
    app.waitForState(job, JobState.RUNNING);
    Map<TaskId, Task> tasks = job.getTasks();
    Assert.assertEquals("Num tasks is not correct", NUM_MAPPERS + NUM_REDUCERS, tasks.size());
    Iterator<Task> taskIter = tasks.values().iterator();
    while (taskIter.hasNext()) {
        app.waitForState(taskIter.next(), TaskState.RUNNING);
    }
    // Process the update events
    clock.setTime(System.currentTimeMillis() + 2000);
    EventHandler appEventHandler = app.getContext().getEventHandler();
    for (Map.Entry<TaskId, Task> mapTask : tasks.entrySet()) {
        for (Map.Entry<TaskAttemptId, TaskAttempt> taskAttempt : mapTask.getValue().getAttempts().entrySet()) {
            TaskAttemptStatus status = createTaskAttemptStatus(taskAttempt.getKey(), (float) 0.8, TaskAttemptState.RUNNING);
            TaskAttemptStatusUpdateEvent event = new TaskAttemptStatusUpdateEvent(taskAttempt.getKey(), status);
            appEventHandler.handle(event);
        }
    }
    Random generator = new Random();
    Object[] taskValues = tasks.values().toArray();
    final Task taskToBeSpeculated = (Task) taskValues[generator.nextInt(taskValues.length)];
    // Other than one random task, finish every other task.
    for (Map.Entry<TaskId, Task> mapTask : tasks.entrySet()) {
        for (Map.Entry<TaskAttemptId, TaskAttempt> taskAttempt : mapTask.getValue().getAttempts().entrySet()) {
            if (mapTask.getKey() != taskToBeSpeculated.getID()) {
                appEventHandler.handle(new TaskAttemptEvent(taskAttempt.getKey(), TaskAttemptEventType.TA_DONE));
                appEventHandler.handle(new TaskAttemptEvent(taskAttempt.getKey(), TaskAttemptEventType.TA_CONTAINER_COMPLETED));
                app.waitForState(taskAttempt.getValue(), TaskAttemptState.SUCCEEDED);
            }
        }
    }
    GenericTestUtils.waitFor(new Supplier<Boolean>() {

        @Override
        public Boolean get() {
            if (taskToBeSpeculated.getAttempts().size() != 2) {
                clock.setTime(System.currentTimeMillis() + 1000);
                return false;
            } else {
                return true;
            }
        }
    }, 1000, 60000);
    // finish 1st TA, 2nd will be killed
    TaskAttempt[] ta = makeFirstAttemptWin(appEventHandler, taskToBeSpeculated);
    verifySpeculationMessage(app, ta);
    app.waitForState(Service.STATE.STOPPED);
}