Package org.apache.hadoop.mapreduce.v2.app.job

Examples of org.apache.hadoop.mapreduce.v2.app.job.Task

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    Job job = app.submit(new Configuration());
    JobId jobId = app.getJobId();
    app.waitForState(job, JobState.RUNNING);
    Assert.assertEquals("Num tasks not correct", 2, job.getTasks().size());
    Iterator<Task> it = job.getTasks().values().iterator();
    Task mapTask = it.next();
    Task reduceTask = it.next();
    app.waitForState(mapTask, TaskState.RUNNING);
    app.waitForState(reduceTask, TaskState.RUNNING);
    TaskAttempt mapAttempt = mapTask.getAttempts().values().iterator().next();
    app.waitForState(mapAttempt, TaskAttemptState.RUNNING);
    TaskAttempt reduceAttempt = reduceTask.getAttempts().values().iterator().next();
    app.waitForState(reduceAttempt, TaskAttemptState.RUNNING);

    // Finish map
    app.getContext().getEventHandler().handle(
        new TaskAttemptEvent(
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    Job job = app.submit(new Configuration());
    JobId jobId = app.getJobId();
    app.waitForState(job, JobState.RUNNING);
    Assert.assertEquals("Num tasks not correct", 2, job.getTasks().size());
    Iterator<Task> it = job.getTasks().values().iterator();
    Task mapTask = it.next();
    Task reduceTask = it.next();
    app.waitForState(mapTask, TaskState.RUNNING);
    app.waitForState(reduceTask, TaskState.RUNNING);
    TaskAttempt mapAttempt = mapTask.getAttempts().values().iterator().next();
    app.waitForState(mapAttempt, TaskAttemptState.RUNNING);
    TaskAttempt reduceAttempt = reduceTask.getAttempts().values().iterator().next();
    app.waitForState(reduceAttempt, TaskAttemptState.RUNNING);

    // The order in the dispatch event queue, from the oldest to the newest
    // TA_DONE
    // JOB_KILL
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    app.waitForState(job, JobState.RUNNING);
    Map<TaskId,Task> tasks = job.getTasks();
    Assert.assertEquals("No of tasks is not correct", 2,
        tasks.size());
    Iterator<Task> it = tasks.values().iterator();
    Task task1 = it.next();
    Task task2 = it.next();
   
    //wait for tasks to become running
    app.waitForState(task1, TaskState.SCHEDULED);
    app.waitForState(task2, TaskState.SCHEDULED);
   
    //send the kill signal to the first Task's attempt
    TaskAttempt attempt = task1.getAttempts().values().iterator().next();
    app.getContext().getEventHandler().handle(
          new TaskAttemptEvent(attempt.getID(), TaskAttemptEventType.TA_KILL));
   
    //unblock
    latch.countDown();
   
    //wait and validate for Job to become SUCCEEDED
    //job will still succeed
    app.waitForState(job, JobState.SUCCEEDED);
   
    //first Task will have two attempts 1st is killed, 2nd Succeeds
    //both Tasks and Job succeeds
    Assert.assertEquals("Task state not correct", TaskState.SUCCEEDED,
        task1.getReport().getTaskState());
    Assert.assertEquals("Task state not correct", TaskState.SUCCEEDED,
        task2.getReport().getTaskState());
    Map<TaskAttemptId, TaskAttempt> attempts = task1.getAttempts();
    Assert.assertEquals("No of attempts is not correct", 2,
        attempts.size());
    Iterator<TaskAttempt> iter = attempts.values().iterator();
    Assert.assertEquals("Attempt state not correct", TaskAttemptState.KILLED,
          iter.next().getReport().getTaskAttemptState());
    Assert.assertEquals("Attempt state not correct", TaskAttemptState.SUCCEEDED,
        iter.next().getReport().getTaskAttemptState());
   
    attempts = task2.getAttempts();
    Assert.assertEquals("No of attempts is not correct", 1,
        attempts.size());
    iter = attempts.values().iterator();
    Assert.assertEquals("Attempt state not correct", TaskAttemptState.SUCCEEDED,
          iter.next().getReport().getTaskAttemptState());
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    MRApp app = new MRApp(1, 0, false, this.getClass().getName(), true);
    Job job = app.submit(new Configuration());
    app.waitForState(job, JobState.RUNNING);
    Assert.assertEquals("Num tasks not correct", 1, job.getTasks().size());
    Iterator<Task> it = job.getTasks().values().iterator();
    Task task = it.next();
    app.waitForState(task, TaskState.RUNNING);
    TaskAttempt attempt = task.getAttempts().values().iterator().next();
    app.waitForState(attempt, TaskAttemptState.RUNNING);

    //send the commit pending signal to the task
    app.getContext().getEventHandler().handle(
        new TaskAttemptEvent(
            attempt.getID(),
            TaskAttemptEventType.TA_COMMIT_PENDING));

    //wait for first attempt to commit pending
    app.waitForState(attempt, TaskAttemptState.COMMIT_PENDING);

    //re-send the commit pending signal to the task
    app.getContext().getEventHandler().handle(
        new TaskAttemptEvent(
            attempt.getID(),
            TaskAttemptEventType.TA_COMMIT_PENDING));

    //the task attempt should be still at COMMIT_PENDING
    app.waitForState(attempt, TaskAttemptState.COMMIT_PENDING);

    //send the done signal to the task
    app.getContext().getEventHandler().handle(
        new TaskAttemptEvent(
            task.getAttempts().values().iterator().next().getID(),
            TaskAttemptEventType.TA_DONE));

    app.waitForState(job, JobState.SUCCEEDED);
  }
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    Job job = app.submit(conf);
    app.waitForState(job, JobState.RUNNING);
    //all maps would be running
    Assert.assertEquals("Num tasks not correct", 3, job.getTasks().size());
    Iterator<Task> it = job.getTasks().values().iterator();
    Task mapTask1 = it.next();
    Task mapTask2 = it.next();
    Task reduceTask = it.next();
   
    // all maps must be running
    app.waitForState(mapTask1, TaskState.RUNNING);
    app.waitForState(mapTask2, TaskState.RUNNING);
   
    TaskAttempt task1Attempt = mapTask1.getAttempts().values().iterator().next();
    TaskAttempt task2Attempt = mapTask2.getAttempts().values().iterator().next();
   
    //before sending the TA_DONE, event make sure attempt has come to
    //RUNNING state
    app.waitForState(task1Attempt, TaskAttemptState.RUNNING);
    app.waitForState(task2Attempt, TaskAttemptState.RUNNING);
   
    // reduces must be in NEW state
    Assert.assertEquals("Reduce Task state not correct",
        TaskState.NEW, reduceTask.getReport().getTaskState());
   
    //send the done signal to the 1st map task
    app.getContext().getEventHandler().handle(
        new TaskAttemptEvent(
            mapTask1.getAttempts().values().iterator().next().getID(),
            TaskAttemptEventType.TA_DONE));
   
    //wait for first map task to complete
    app.waitForState(mapTask1, TaskState.SUCCEEDED);

    //Once the first map completes, it will schedule the reduces
    //now reduce must be running
    app.waitForState(reduceTask, TaskState.RUNNING);
   
    //send the done signal to 2nd map and the reduce to complete the job
    app.getContext().getEventHandler().handle(
        new TaskAttemptEvent(
            mapTask2.getAttempts().values().iterator().next().getID(),
            TaskAttemptEventType.TA_DONE));
    app.getContext().getEventHandler().handle(
        new TaskAttemptEvent(
            reduceTask.getAttempts().values().iterator().next().getID(),
            TaskAttemptEventType.TA_DONE));
   
    app.waitForState(job, JobState.SUCCEEDED);
  }
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    conf.setBoolean(MRJobConfig.JOB_UBERTASK_ENABLE, false);
    Job job = app.submit(conf);
    app.waitForState(job, JobState.RUNNING);
    Assert.assertEquals("Num tasks not correct", 4, job.getTasks().size());
    Iterator<Task> it = job.getTasks().values().iterator();
    Task mapTask1 = it.next();
    Task mapTask2 = it.next();

    // all maps must be running
    app.waitForState(mapTask1, TaskState.RUNNING);
    app.waitForState(mapTask2, TaskState.RUNNING);

    TaskAttempt task1Attempt = mapTask1.getAttempts().values().iterator()
        .next();
    TaskAttempt task2Attempt = mapTask2.getAttempts().values().iterator()
        .next();
    NodeId node1 = task1Attempt.getNodeId();
    NodeId node2 = task2Attempt.getNodeId();
    Assert.assertEquals(node1, node2);

    // send the done signal to the task
    app.getContext()
        .getEventHandler()
        .handle(
            new TaskAttemptEvent(task1Attempt.getID(),
                TaskAttemptEventType.TA_DONE));
    app.getContext()
        .getEventHandler()
        .handle(
            new TaskAttemptEvent(task2Attempt.getID(),
                TaskAttemptEventType.TA_DONE));

    // all maps must be succeeded
    app.waitForState(mapTask1, TaskState.SUCCEEDED);
    app.waitForState(mapTask2, TaskState.SUCCEEDED);

    TaskAttemptCompletionEvent[] events = job.getTaskAttemptCompletionEvents(0,
        100);
    Assert.assertEquals("Expecting 2 completion events for success", 2,
        events.length);

    // send updated nodes info
    ArrayList<NodeReport> updatedNodes = new ArrayList<NodeReport>();
    NodeReport nr = RecordFactoryProvider.getRecordFactory(null)
        .newRecordInstance(NodeReport.class);
    nr.setNodeId(node1);
    nr.setNodeState(NodeState.UNHEALTHY);
    updatedNodes.add(nr);
    app.getContext().getEventHandler()
        .handle(new JobUpdatedNodesEvent(job.getID(), updatedNodes));

    app.waitForState(task1Attempt, TaskAttemptState.KILLED);
    app.waitForState(task2Attempt, TaskAttemptState.KILLED);

    events = job.getTaskAttemptCompletionEvents(0, 100);
    Assert.assertEquals("Expecting 2 more completion events for killed", 4,
        events.length);

    // all maps must be back to running
    app.waitForState(mapTask1, TaskState.RUNNING);
    app.waitForState(mapTask2, TaskState.RUNNING);

    Iterator<TaskAttempt> itr = mapTask1.getAttempts().values().iterator();
    itr.next();
    task1Attempt = itr.next();

    // send the done signal to the task
    app.getContext()
        .getEventHandler()
        .handle(
            new TaskAttemptEvent(task1Attempt.getID(),
                TaskAttemptEventType.TA_DONE));

    // map1 must be succeeded. map2 must be running
    app.waitForState(mapTask1, TaskState.SUCCEEDED);
    app.waitForState(mapTask2, TaskState.RUNNING);

    events = job.getTaskAttemptCompletionEvents(0, 100);
    Assert.assertEquals("Expecting 1 more completion events for success", 5,
        events.length);

    // Crash the app again.
    app.stop();

    // rerun
    // in rerun the 1st map will be recovered from previous run
    app = new MRAppWithHistory(2, 2, false, this.getClass().getName(), false,
        ++runCount);
    conf = new Configuration();
    conf.setBoolean(MRJobConfig.MR_AM_JOB_RECOVERY_ENABLE, true);
    conf.setBoolean(MRJobConfig.JOB_UBERTASK_ENABLE, false);
    job = app.submit(conf);
    app.waitForState(job, JobState.RUNNING);
    Assert.assertEquals("No of tasks not correct", 4, job.getTasks().size());
    it = job.getTasks().values().iterator();
    mapTask1 = it.next();
    mapTask2 = it.next();
    Task reduceTask1 = it.next();
    Task reduceTask2 = it.next();

    // map 1 will be recovered, no need to send done
    app.waitForState(mapTask1, TaskState.SUCCEEDED);
    app.waitForState(mapTask2, TaskState.RUNNING);

    events = job.getTaskAttemptCompletionEvents(0, 100);
    Assert.assertEquals(
        "Expecting 2 completion events for killed & success of map1", 2,
        events.length);

    task2Attempt = mapTask2.getAttempts().values().iterator().next();
    app.getContext()
        .getEventHandler()
        .handle(
            new TaskAttemptEvent(task2Attempt.getID(),
                TaskAttemptEventType.TA_DONE));
    app.waitForState(mapTask2, TaskState.SUCCEEDED);

    events = job.getTaskAttemptCompletionEvents(0, 100);
    Assert.assertEquals("Expecting 1 more completion events for success", 3,
        events.length);

    app.waitForState(reduceTask1, TaskState.RUNNING);
    app.waitForState(reduceTask2, TaskState.RUNNING);

    TaskAttempt task3Attempt = reduceTask1.getAttempts().values().iterator()
        .next();
    app.getContext()
        .getEventHandler()
        .handle(
            new TaskAttemptEvent(task3Attempt.getID(),
                TaskAttemptEventType.TA_DONE));
    app.waitForState(reduceTask1, TaskState.SUCCEEDED);
    app.getContext()
    .getEventHandler()
    .handle(
        new TaskAttemptEvent(task3Attempt.getID(),
            TaskAttemptEventType.TA_KILL));
    app.waitForState(reduceTask1, TaskState.SUCCEEDED);
   
    TaskAttempt task4Attempt = reduceTask2.getAttempts().values().iterator()
        .next();
    app.getContext()
        .getEventHandler()
        .handle(
            new TaskAttemptEvent(task4Attempt.getID(),
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    MRApp app = new MRApp(1, 0, false, this.getClass().getName(), true);
    Job job = app.submit(new Configuration());
    app.waitForState(job, JobState.RUNNING);
    Assert.assertEquals("Num tasks not correct", 1, job.getTasks().size());
    Iterator<Task> it = job.getTasks().values().iterator();
    Task task = it.next();
    app.waitForState(task, TaskState.RUNNING);

    //send an invalid event on task at current state
    app.getContext().getEventHandler().handle(
        new TaskEvent(
            task.getID(), TaskEventType.T_SCHEDULE));

    //this must lead to job error
    app.waitForState(job, JobState.ERROR);
  }
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    MRApp app = new MRApp(1, 0, false, this.getClass().getName(), true);
    Job job = app.submit(new Configuration());
    app.waitForState(job, JobState.RUNNING);
    Assert.assertEquals("Num tasks not correct", 1, job.getTasks().size());
    Iterator<Task> it = job.getTasks().values().iterator();
    Task task = it.next();
    app.waitForState(task, TaskState.RUNNING);

    //send an reboot event
    app.getContext().getEventHandler().handle(new JobEvent(job.getID(),
      JobEventType.JOB_AM_REBOOT));
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    Configuration conf = new Configuration();
    Job job = app.submit(conf);
    app.waitForState(job, JobState.RUNNING);
    Assert.assertEquals("Num tasks not correct", 1, job.getTasks().size());
    Iterator<Task> it = job.getTasks().values().iterator();
    Task task = it.next();
    app.waitForState(task, TaskState.RUNNING);

    //send an reboot event
    app.getContext().getEventHandler().handle(new JobEvent(job.getID(),
      JobEventType.JOB_AM_REBOOT));
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  class SpeculationRequestEventHandler implements EventHandler<TaskEvent> {

    @Override
    public void handle(TaskEvent event) {
      TaskId taskID = event.getTaskID();
      Task task = myJob.getTask(taskID);

      Assert.assertEquals
          ("Wrong type event", TaskEventType.T_ADD_SPEC_ATTEMPT, event.getType());

      System.out.println("SpeculationRequestEventHandler.handle adds a speculation task for " + taskID);
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Related Classes of org.apache.hadoop.mapreduce.v2.app.job.Task

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  • org.apache.hadoop.mapred.TestClientRedirect$AMService
  • org.apache.hadoop.mapred.TestClientRedirect$HistoryService
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