conf.setClass(JTConfig.JT_TASK_SCHEDULER,
FakeTaskScheduler.class, TaskScheduler.class);
conf.set(JTConfig.JT_INSTRUMENTATION,
FakeJobTrackerMetricsInst.class.getName());
jobTracker = new FakeJobTracker(conf, new FakeClock(), trackers);
mi = (FakeJobTrackerMetricsInst) jobTracker.getInstrumentation();
for (String tracker : trackers) {
FakeObjectUtilities.establishFirstContact(jobTracker, tracker);
}