job.finishTask(taskAttemptID[5]);
assertEquals("Tracker "+ trackers[0] + " expected to be not slow ",
job.isSlowTracker(trackers[0]), false);
clock.advance(100000);
//After a long time, some tasks finished on trackers[2]
job.finishTask(taskAttemptID[6]);
job.finishTask(taskAttemptID[7]);
job.finishTask(taskAttemptID[8]);
assertEquals("Tracker "+ trackers[2] + " expected to be slow ",
job.isSlowTracker(trackers[2]), true);
}