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Launch separate TaskTracker nodes for Map/Reduce slots #57

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Launch separate TaskTracker nodes for Map/Reduce slots #57

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02ef187
Launch separate task trackers for Map/Reduce slots
tarnfeld May 5, 2015
4a7b729
Check reduceSlots instead of mapSlots, typo
tarnfeld May 5, 2015
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29 changes: 15 additions & 14 deletions src/main/java/org/apache/hadoop/mapred/MesosTracker.java
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
import org.apache.commons.httpclient.HttpHost;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.mapreduce.TaskType;
import org.apache.mesos.Protos.TaskID;

import java.util.Collection;
Expand All @@ -20,8 +21,8 @@ public class MesosTracker {
public static final Log LOG = LogFactory.getLog(MesosScheduler.class);
public volatile HttpHost host;
public TaskID taskId;
public long mapSlots;
public long reduceSlots;
public long slots;
public TaskType slotType;
public volatile long idleCounter = 0;
public volatile long idleCheckInterval = 0;
public volatile long idleCheckMax = 0;
Expand All @@ -32,12 +33,12 @@ public class MesosTracker {
public Set<JobID> jobs = Collections.newSetFromMap(new ConcurrentHashMap<JobID, Boolean>());
public com.codahale.metrics.Timer.Context context;

public MesosTracker(HttpHost host, TaskID taskId, long mapSlots,
long reduceSlots, MesosScheduler scheduler) {
public MesosTracker(HttpHost host, TaskID taskId, long slots,
TaskType slotType, MesosScheduler scheduler) {
this.host = host;
this.taskId = taskId;
this.mapSlots = mapSlots;
this.reduceSlots = reduceSlots;
this.slots = slots;
this.slotType = slotType;
this.scheduler = scheduler;

if (scheduler.metrics != null) {
Expand Down Expand Up @@ -119,23 +120,23 @@ public void run() {
return;
}

long idleMapSlots = 0;
long idleReduceSlots = 0;
long idleSlots = 0;

Collection<TaskTrackerStatus> taskTrackers = scheduler.jobTracker.taskTrackers();
for (TaskTrackerStatus status : taskTrackers) {
HttpHost host = new HttpHost(status.getHost(), status.getHttpPort());
if (host.toString().equals(MesosTracker.this.host.toString())) {
idleMapSlots += status.getAvailableMapSlots();
idleReduceSlots += status.getAvailableReduceSlots();
if (slotType == TaskType.MAP) {
idleSlots += status.getAvailableMapSlots();
} else {
idleSlots += status.getAvailableReduceSlots();
}

break;
}
}

trackerIsIdle = idleMapSlots == MesosTracker.this.mapSlots &&
idleReduceSlots == MesosTracker.this.reduceSlots;

if (trackerIsIdle) {
if (idleSlots == MesosTracker.this.slots) {
LOG.info("TaskTracker appears idle right now: " + MesosTracker.this.host);
MesosTracker.this.idleCounter += 1;
} else {
Expand Down
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