//
// runs a single task tracker
// checks that generated events conform to expectedEvents
// and the mock jobtracker checks that the heartbeats() sent to it are right
//
private void runTaskTracker() {
long runUntil = eventQueue.getLastCheckTime();
LOG.debug("Running task tracker until simulation time=" + runUntil);
List<SimulatorEvent> events = taskTracker.init(simulationStartTime);
eventQueue.addAll(events);
while (true) {
// can't be empty as it must go past runUntil for verifiability
// besides it is never empty because of HeartbeatEvent
SimulatorEvent currentEvent = eventQueue.get();
// copy time, make sure TT does not modify it
long now = currentEvent.getTimeStamp();
LOG.debug("Number of events to deliver=" + (eventQueue.getSize() + 1) + ", now=" + now);
if (now > runUntil) {
break;
}
LOG.debug("Calling accept(), event=" + currentEvent + ", now=" + now);
events = taskTracker.accept(currentEvent);
LOG.debug("Accept() returned " + events.size() + " new event(s)");
for (SimulatorEvent newEvent : events) {
LOG.debug("New event " + newEvent);
}
eventQueue.addAll(events);
LOG.debug("Done checking and enqueuing new events");
}
// make sure we have seen all expected events, even for the last
// time checked
eventQueue.checkMissingExpected();
// Mock JT should have consumed all entries from its heartbeat table
jobTracker.checkMissingHeartbeats();
}
private void setUpReduceTask(
TaskAttemptID reduceTaskId,
long reduceStart,
long mapDoneDelay,
long reduceRuntime,
long reduceKill) {
jobTracker.runReduceTask(
taskTrackerName, reduceTaskId, reduceStart, mapDoneDelay, reduceRuntime, reduceKill);
long mapDone = jobTracker.nextHeartbeat(reduceStart + mapDoneDelay);
if (reduceKill < 0 || mapDone < reduceKill) {
// it generates completion events iff it survives mapDone
eventQueue.expectReduceTask(
taskTracker, reduceTaskId,
mapDone, reduceRuntime);
}
}
private void setUpMapTask(TaskAttemptID mapTaskId, long mapStart, long mapRuntime, long mapKill) {
jobTracker.runMapTask(taskTrackerName, mapTaskId, mapStart, mapRuntime, mapKill);
eventQueue.expectMapTask(taskTracker, mapTaskId, mapStart, mapRuntime);
}
// numAccepts must be at least 1
private void setUpHeartbeats(int numAccepts) {
eventQueue.expectHeartbeats(taskTracker, numAccepts, heartbeatInterval);
jobTracker.expectEmptyHeartbeats(taskTrackerName, numAccepts);
}