Package org.apache.hadoop.mapred.TaskTracker

Examples of org.apache.hadoop.mapred.TaskTracker.TaskLauncher

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    tt.setConf(ttConf);
    tt.setIndexCache(new IndexCache(ttConf));
    tt.setTaskMemoryManagerEnabledFlag();
   
    // start map-task launcher with four slots
    TaskLauncher mapLauncher = tt.new TaskLauncher(TaskType.MAP, 4);
    mapLauncher.start();
   
    // launch a task which requires five slots
    String jtId = "test";
    TaskAttemptID attemptID = new TaskAttemptID(jtId, 1, TaskType.MAP, 0, 0);
    Task task = new MapTask(null, attemptID, 0, null, 5);
    mapLauncher.addToTaskQueue(new LaunchTaskAction(task));
    // verify that task is added to runningTasks
    TaskInProgress killTip = tt.runningTasks.get(attemptID);
    assertNotNull(killTip);

    // wait for a while for launcher to pick up the task
    // this loop waits atmost for 30 seconds
    for (int i = 0; i < 300; i++) {
      if (mapLauncher.getNumWaitingTasksToLaunch() == 0) {
        break;
      }
      UtilsForTests.waitFor(100);
    }
    assertEquals("Launcher didnt pick up the task " + attemptID + "to launch",
        0, mapLauncher.getNumWaitingTasksToLaunch());

    // Now, that launcher has picked up the task, it waits until all five slots
    // are available. i.e. it waits for-ever
    // lets kill the task so that map launcher comes out
    tt.processKillTaskAction(new KillTaskAction(attemptID));
    assertEquals(TaskStatus.State.KILLED, killTip.getRunState());

    // launch another attempt which requires only one slot
    TaskAttemptID runningAttemptID = new TaskAttemptID(jtId, 1, TaskType.MAP,
        0, expectedLaunchAttemptId);
    mapLauncher.addToTaskQueue(new LaunchTaskAction(new MapTask(null,
        runningAttemptID, 0, null, 1)));
    TaskInProgress runningTip = tt.runningTasks.get(runningAttemptID);
    assertNotNull(runningTip);

    // wait for a while for the task to be launched
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    tt.runningTasks = new LinkedHashMap<TaskAttemptID, TaskInProgress>();
    tt.setIndexCache(new IndexCache(ttConf));
    tt.setTaskMemoryManagerEnabledFlag();

    // start map-task launcher with four slots
    TaskLauncher mapLauncher = tt.new TaskLauncher(TaskType.MAP, 4);
    mapLauncher.start();

    // launch a task which requires five slots
    String jtId = "test";
    TaskAttemptID attemptID = new TaskAttemptID(jtId, 1, true, 0, 0);
    Task task = new MapTask(null, attemptID, 0, null, 5);
    mapLauncher.addToTaskQueue(new LaunchTaskAction(task));
    // verify that task is added to runningTasks
    TaskInProgress killTip = tt.runningTasks.get(attemptID);
    assertNotNull(killTip);

    // wait for a while for launcher to pick up the task
    // this loop waits atmost for 30 seconds
    for (int i = 0; i < 300; i++) {
      if (mapLauncher.getNumWaitingTasksToLaunch() == 0) {
        break;
      }
      UtilsForTests.waitFor(100);
    }
    assertEquals("Launcher didnt pick up the task " + attemptID + "to launch",
        0, mapLauncher.getNumWaitingTasksToLaunch());

    // Now, that launcher has picked up the task, it waits until all five slots
    // are available. i.e. it waits for-ever
    // lets kill the task so that map launcher comes out
    tt.processKillTaskAction(new KillTaskAction(attemptID));
    assertEquals(TaskStatus.State.KILLED, killTip.getRunState());

    // launch another attempt which requires only one slot
    TaskAttemptID runningAttemptID = new TaskAttemptID(jtId, 1, true,
        0, expectedLaunchAttemptId);
    mapLauncher.addToTaskQueue(new LaunchTaskAction(new MapTask(null,
        runningAttemptID, 0, null, 1)));
    TaskInProgress runningTip = tt.runningTasks.get(runningAttemptID);
    assertNotNull(runningTip);

    // wait for a while for the task to be launched
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    tt.runningTasks = new LinkedHashMap<TaskAttemptID, TaskInProgress>();
    tt.setIndexCache(new IndexCache(ttConf));
    tt.setTaskMemoryManagerEnabledFlag();

    // start map-task launcher with four slots
    TaskLauncher mapLauncher = tt.new TaskLauncher(TaskType.MAP, 4);
    mapLauncher.start();

    // launch a task which simulates large localization
    String jtId = "test";
    TaskAttemptID attemptID = new TaskAttemptID(jtId, 1, true, 0, 0);
    Task task = new MapTask(null, attemptID, 0, null, 2);
    mapLauncher.addToTaskQueue(new LaunchTaskAction(task));
    // verify that task is added to runningTasks
    TaskInProgress runningTip = tt.runningTasks.get(attemptID);
    assertNotNull(runningTip);

    // wait for a while for the first task to start initializing
    // this loop waits at most for 30 seconds
    for (int i = 0; i < 300; i++) {
      if (firstJobStarted == true) {
        break;
      }
      UtilsForTests.waitFor(100);
    }

    // Now start a second task and make sure it doesn't wait while first one initializes
    String secondjtId = "test2";
    TaskAttemptID secondAttemptID = new TaskAttemptID(secondjtId, 1, true, 0, 0);
    Task secondTask = new MapTask(null, secondAttemptID, 0, null, 2);
    mapLauncher.addToTaskQueue(new LaunchTaskAction(secondTask));
    // verify that task is added to runningTasks
    TaskInProgress secondRunningTip = tt.runningTasks.get(secondAttemptID);
    assertNotNull(secondRunningTip);

    // wait for a while for the second task to be launched
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    tt.runningTasks = new LinkedHashMap<TaskAttemptID, TaskInProgress>();
    tt.setIndexCache(new IndexCache(ttConf));
    tt.setTaskMemoryManagerEnabledFlag();

    // start map-task launcher with four slots
    TaskLauncher mapLauncher = tt.new TaskLauncher(TaskType.MAP, 4);
    mapLauncher.start();

    // launch a task which simulates large localization
    String jtId = "test";
    TaskAttemptID attemptID = new TaskAttemptID(jtId, 1, true, 0, 0);
    Task task = new MapTask(null, attemptID, 0, null, 2);
    mapLauncher.addToTaskQueue(new LaunchTaskAction(task));
    // verify that task is added to runningTasks
    TaskInProgress runningTip = tt.runningTasks.get(attemptID);
    assertNotNull(runningTip);

    // wait for a while for the first task to start initializing
    // this loop waits at most for 30 seconds
    for (int i = 0; i < 300; i++) {
      if (firstJobStarted == true) {
        break;
      }
      UtilsForTests.waitFor(100);
    }

    // Now start a second task and make sure it doesn't wait while first one initializes
    String secondjtId = "test2";
    TaskAttemptID secondAttemptID = new TaskAttemptID(secondjtId, 1, true, 0, 0);
    Task secondTask = new MapTask(null, secondAttemptID, 0, null, 2);
    mapLauncher.addToTaskQueue(new LaunchTaskAction(secondTask));
    // verify that task is added to runningTasks
    TaskInProgress secondRunningTip = tt.runningTasks.get(secondAttemptID);
    assertNotNull(secondRunningTip);

    // wait for a while for the second task to be launched
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    // Set up TaskTracker instrumentation
    tt.setTaskTrackerInstrumentation(
        TaskTracker.createInstrumentation(tt, tt.getJobConf()));

    // start map-task launcher with four slots
    TaskLauncher mapLauncher = tt.new TaskLauncher(TaskType.MAP, 4);
    mapLauncher.start();
   
    // launch a task which requires five slots
    String jtId = "test";
    TaskAttemptID attemptID = new TaskAttemptID(jtId, 1, TaskType.MAP, 0, 0);
    Task task = new MapTask(null, attemptID, 0, null, 5);
    mapLauncher.addToTaskQueue(new LaunchTaskAction(task));
    // verify that task is added to runningTasks
    TaskInProgress killTip = tt.runningTasks.get(attemptID);
    assertNotNull(killTip);

    // wait for a while for launcher to pick up the task
    // this loop waits atmost for 30 seconds
    for (int i = 0; i < 300; i++) {
      if (mapLauncher.getNumWaitingTasksToLaunch() == 0) {
        break;
      }
      UtilsForTests.waitFor(100);
    }
    assertEquals("Launcher didnt pick up the task " + attemptID + "to launch",
        0, mapLauncher.getNumWaitingTasksToLaunch());

    // Now, that launcher has picked up the task, it waits until all five slots
    // are available. i.e. it waits for-ever
    // lets kill the task so that map launcher comes out
    tt.processKillTaskAction(new KillTaskAction(attemptID));
    assertEquals(TaskStatus.State.KILLED, killTip.getRunState());

    // launch another attempt which requires only one slot
    TaskAttemptID runningAttemptID = new TaskAttemptID(jtId, 1, TaskType.MAP,
        0, expectedLaunchAttemptId);
    mapLauncher.addToTaskQueue(new LaunchTaskAction(new MapTask(null,
        runningAttemptID, 0, null, 1)));
    TaskInProgress runningTip = tt.runningTasks.get(runningAttemptID);
    assertNotNull(runningTip);

    // wait for a while for the task to be launched
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Related Classes of org.apache.hadoop.mapred.TaskTracker.TaskLauncher

  • org.apache.hadoop.mapred.TestTaskLauncher
  • org.apache.hadoop.mapred.TestTaskLauncherThreaded
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