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YARN-4462. FairScheduler: Disallow preemption from a queue. (Tao Jie via kasha) 

(cherry picked from commit fb238d7e5d)
This commit is contained in:
Karthik Kambatla 2016-01-27 11:47:29 -08:00
parent b94fbdf6f0
commit c25154576b
8 changed files with 377 additions and 6 deletions
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2
hadoop-yarn-project/CHANGES.txt
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@ -9,6 +9,8 @@ Release 2.9.0 - UNRELEASED
YARN-1856. Added cgroups based memory monitoring for containers as another
alternative to custom memory-monitoring. (Varun Vasudev via vinodkv)
YARN-4462. FairScheduler: Disallow preemption from a queue. (Tao Jie via kasha)
IMPROVEMENTS
YARN-4072. ApplicationHistoryServer, WebAppProxyServer, NodeManager and

11
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/AllocationConfiguration.java
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@ -98,6 +98,8 @@ public class AllocationConfiguration extends ReservationSchedulerConfiguration {
// Reservation system configuration
private ReservationQueueConfiguration globalReservationQueueConfig;
private final Set<String> nonPreemptableQueues;
public AllocationConfiguration(Map<String, Resource> minQueueResources,
Map<String, Resource> maxQueueResources,
Map<String, Integer> queueMaxApps, Map<String, Integer> userMaxApps,
@ -114,7 +116,8 @@ public AllocationConfiguration(Map<String, Resource> minQueueResources,
QueuePlacementPolicy placementPolicy,
Map<FSQueueType, Set<String>> configuredQueues,
ReservationQueueConfiguration globalReservationQueueConfig,
Set<String> reservableQueues) {
Set<String> reservableQueues,
Set<String> nonPreemptableQueues) {
this.minQueueResources = minQueueResources;
this.maxQueueResources = maxQueueResources;
this.queueMaxApps = queueMaxApps;
@ -135,6 +138,7 @@ public AllocationConfiguration(Map<String, Resource> minQueueResources,
this.globalReservationQueueConfig = globalReservationQueueConfig;
this.placementPolicy = placementPolicy;
this.configuredQueues = configuredQueues;
this.nonPreemptableQueues = nonPreemptableQueues;
}
public AllocationConfiguration(Configuration conf) {
@ -161,6 +165,7 @@ public AllocationConfiguration(Configuration conf) {
}
placementPolicy = QueuePlacementPolicy.fromConfiguration(conf,
configuredQueues);
nonPreemptableQueues = new HashSet<String>();
}
/**
@ -210,6 +215,10 @@ public float getFairSharePreemptionThreshold(String queueName) {
-1f : fairSharePreemptionThreshold;
}
public boolean isPreemptable(String queueName) {
return !nonPreemptableQueues.contains(queueName);
}
public ResourceWeights getQueueWeight(String queue) {
ResourceWeights weight = queueWeights.get(queue);
return (weight == null) ? ResourceWeights.NEUTRAL : weight;

16
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/AllocationFileLoaderService.java
View File

@ -224,6 +224,7 @@ public synchronized void reloadAllocations() throws IOException,
Map<String, Map<QueueACL, AccessControlList>> queueAcls =
new HashMap<String, Map<QueueACL, AccessControlList>>();
Set<String> reservableQueues = new HashSet<String>();
Set<String> nonPreemptableQueues = new HashSet<String>();
int userMaxAppsDefault = Integer.MAX_VALUE;
int queueMaxAppsDefault = Integer.MAX_VALUE;
Resource queueMaxResourcesDefault = Resources.unbounded();
@ -360,7 +361,7 @@ public synchronized void reloadAllocations() throws IOException,
queueMaxApps, userMaxApps, queueMaxAMShares, queueWeights,
queuePolicies, minSharePreemptionTimeouts, fairSharePreemptionTimeouts,
fairSharePreemptionThresholds, queueAcls, configuredQueues,
reservableQueues);
reservableQueues, nonPreemptableQueues);
}
// Load placement policy and pass it configured queues
@ -409,7 +410,7 @@ public synchronized void reloadAllocations() throws IOException,
defaultSchedPolicy, minSharePreemptionTimeouts,
fairSharePreemptionTimeouts, fairSharePreemptionThresholds, queueAcls,
newPlacementPolicy, configuredQueues, globalReservationQueueConfig,
reservableQueues);
reservableQueues, nonPreemptableQueues);
lastSuccessfulReload = clock.getTime();
lastReloadAttemptFailed = false;
@ -431,7 +432,8 @@ private void loadQueue(String parentName, Element element,
Map<String, Float> fairSharePreemptionThresholds,
Map<String, Map<QueueACL, AccessControlList>> queueAcls,
Map<FSQueueType, Set<String>> configuredQueues,
Set<String> reservableQueues)
Set<String> reservableQueues,
Set<String> nonPreemptableQueues)
throws AllocationConfigurationException {
String queueName = element.getAttribute("name").trim();
@ -508,13 +510,19 @@ private void loadQueue(String parentName, Element element,
isLeaf = false;
reservableQueues.add(queueName);
configuredQueues.get(FSQueueType.PARENT).add(queueName);
} else if ("allowPreemptionFrom".equals(field.getTagName())) {
String text = ((Text)field.getFirstChild()).getData().trim();
if (!Boolean.parseBoolean(text)) {
nonPreemptableQueues.add(queueName);
}
} else if ("queue".endsWith(field.getTagName()) ||
"pool".equals(field.getTagName())) {
loadQueue(queueName, field, minQueueResources, maxQueueResources,
queueMaxApps, userMaxApps, queueMaxAMShares, queueWeights,
queuePolicies, minSharePreemptionTimeouts,
fairSharePreemptionTimeouts, fairSharePreemptionThresholds,
queueAcls, configuredQueues, reservableQueues);
queueAcls, configuredQueues, reservableQueues,
nonPreemptableQueues);
isLeaf = false;
}
}

8
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSParentQueue.java
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@ -260,6 +260,14 @@ public RMContainer preemptContainer() {
readLock.lock();
try {
for (FSQueue queue : childQueues) {
// Skip selection for non-preemptable queue
if (!queue.isPreemptable()) {
if (LOG.isDebugEnabled()) {
LOG.debug("skipping from queue=" + getName()
+ " because it's a non-preemptable queue");
}
continue;
}
if (candidateQueue == null ||
comparator.compare(queue, candidateQueue) > 0) {
candidateQueue = queue;

11
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSQueue.java
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@ -62,6 +62,7 @@ public abstract class FSQueue implements Queue, Schedulable {
private long fairSharePreemptionTimeout = Long.MAX_VALUE;
private long minSharePreemptionTimeout = Long.MAX_VALUE;
private float fairSharePreemptionThreshold = 0.5f;
private boolean preemptable = true;
public FSQueue(String name, FairScheduler scheduler, FSParentQueue parent) {
this.name = name;
@ -235,6 +236,10 @@ public void setFairSharePreemptionThreshold(float fairSharePreemptionThreshold)
this.fairSharePreemptionThreshold = fairSharePreemptionThreshold;
}
public boolean isPreemptable() {
return preemptable;
}
/**
* Recomputes the shares for all child queues and applications based on this
* queue's current share
@ -242,7 +247,8 @@ public void setFairSharePreemptionThreshold(float fairSharePreemptionThreshold)
public abstract void recomputeShares();
/**
* Update the min/fair share preemption timeouts and threshold for this queue.
* Update the min/fair share preemption timeouts, threshold and preemption
* disabled flag for this queue.
*/
public void updatePreemptionVariables() {
// For min share timeout
@ -263,6 +269,9 @@ public void updatePreemptionVariables() {
if (fairSharePreemptionThreshold < 0 && parent != null) {
fairSharePreemptionThreshold = parent.getFairSharePreemptionThreshold();
}
// For option whether allow preemption from this queue
preemptable = scheduler.getAllocationConfiguration()
.isPreemptable(getName());
}
/**

1
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/FairSchedulerPage.java
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@ -81,6 +81,7 @@ protected void render(Block html) {
}
ri._(STEADY_FAIR_SHARE + ":", qinfo.getSteadyFairShare().toString());
ri._(INSTANTANEOUS_FAIR_SHARE + ":", qinfo.getFairShare().toString());
ri._("Preemptable:", qinfo.isPreemptable());
html._(InfoBlock.class);
// clear the info contents so this queue's info doesn't accumulate into another queue's info

7
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/FairSchedulerQueueInfo.java
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@ -65,6 +65,8 @@ public class FairSchedulerQueueInfo {
private String queueName;
private String schedulingPolicy;
private boolean preemptable;
private FairSchedulerQueueInfoList childQueues;
public FairSchedulerQueueInfo() {
@ -108,6 +110,7 @@ public FairSchedulerQueueInfo(FSQueue queue, FairScheduler scheduler) {
return;
}
preemptable = queue.isPreemptable();
childQueues = getChildQueues(queue, scheduler);
}
@ -228,4 +231,8 @@ public Collection<FairSchedulerQueueInfo> getChildQueues() {
return childQueues != null ? childQueues.getQueueInfoList() :
new ArrayList<FairSchedulerQueueInfo>();
}
public boolean isPreemptable() {
return preemptable;
}
}

327
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestFairScheduler.java
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@ -2492,6 +2492,333 @@ public void testPreemptionDecisionWithVariousTimeout() throws Exception {
1536, scheduler.resourceDeficit(queueC, clock.getTime()).getMemory());
}
@Test
/**
* Tests the decision to preempt tasks respect to non-preemptable queues
* 1, Queues as follow:
* queueA(non-preemptable)
* queueB(preemptable)
* parentQueue(non-preemptable)
* --queueC(preemptable)
* queueD(preemptable)
* 2, Submit request to queueA, queueB, queueC, and all of them are over MinShare
* 3, Now all resource are occupied
* 4, Submit request to queueD, and need to preempt resource from other queues
* 5, Only preemptable queue(queueB) would be preempted.
*/
public void testPreemptionDecisionWithNonPreemptableQueue() throws Exception {
conf.set(FairSchedulerConfiguration.ALLOCATION_FILE, ALLOC_FILE);
ControlledClock clock = new ControlledClock();
scheduler.setClock(clock);
PrintWriter out = new PrintWriter(new FileWriter(ALLOC_FILE));
out.println("<?xml version=\"1.0\"?>");
out.println("<allocations>");
out.println("<queue name=\"default\">");
out.println("<maxResources>0mb,0vcores</maxResources>");
out.println("</queue>");
out.println("<queue name=\"queueA\">");
out.println("<weight>.25</weight>");
out.println("<minResources>1024mb,0vcores</minResources>");
out.println("<allowPreemptionFrom>false</allowPreemptionFrom>");
out.println("</queue>");
out.println("<queue name=\"queueB\">");
out.println("<weight>.25</weight>");
out.println("<minResources>1024mb,0vcores</minResources>");
out.println("</queue>");
out.println("<queue name=\"parentQueue\">");
out.println("<allowPreemptionFrom>false</allowPreemptionFrom>");
out.println("<queue name=\"queueC\">");
out.println("<weight>.25</weight>");
out.println("<minResources>1024mb,0vcores</minResources>");
out.println("</queue>");
out.println("</queue>");
out.println("<queue name=\"queueD\">");
out.println("<weight>.25</weight>");
out.println("<minResources>2048mb,0vcores</minResources>");
out.println("</queue>");
out.println("<defaultMinSharePreemptionTimeout>5</defaultMinSharePreemptionTimeout>");
out.println("<defaultFairSharePreemptionTimeout>10</defaultFairSharePreemptionTimeout>");
out.println("<defaultFairSharePreemptionThreshold>.5</defaultFairSharePreemptionThreshold>");
out.println("</allocations>");
out.close();
scheduler.init(conf);
scheduler.start();
scheduler.reinitialize(conf, resourceManager.getRMContext());
// Create four nodes(3G each)
RMNode node1 =
MockNodes.newNodeInfo(1, Resources.createResource(3 * 1024, 3), 1,
"127.0.0.1");
NodeAddedSchedulerEvent nodeEvent1 = new NodeAddedSchedulerEvent(node1);
scheduler.handle(nodeEvent1);
RMNode node2 =
MockNodes.newNodeInfo(1, Resources.createResource(3 * 1024, 3), 2,
"127.0.0.2");
NodeAddedSchedulerEvent nodeEvent2 = new NodeAddedSchedulerEvent(node2);
scheduler.handle(nodeEvent2);
RMNode node3 =
MockNodes.newNodeInfo(1, Resources.createResource(3 * 1024, 3), 3,
"127.0.0.3");
NodeAddedSchedulerEvent nodeEvent3 = new NodeAddedSchedulerEvent(node3);
scheduler.handle(nodeEvent3);
RMNode node4 =
MockNodes.newNodeInfo(1, Resources.createResource(3 * 1024, 3), 4,
"127.0.0.4");
NodeAddedSchedulerEvent nodeEvent4 = new NodeAddedSchedulerEvent(node4);
scheduler.handle(nodeEvent4);
// Submit apps to queueA, queueB, queueC,
// now all resource of the cluster is occupied
ApplicationAttemptId app1 =
createSchedulingRequest(1 * 1024, "queueA", "user1", 4, 1);
ApplicationAttemptId app2 =
createSchedulingRequest(1 * 1024, "queueB", "user1", 4, 2);
ApplicationAttemptId app3 =
createSchedulingRequest(1 * 1024, "parentQueue.queueC", "user1", 4, 3);
scheduler.update();
// Sufficient node check-ins to fully schedule containers
for (int i = 0; i < 3; i++) {
NodeUpdateSchedulerEvent nodeUpdate1 = new NodeUpdateSchedulerEvent(node1);
scheduler.handle(nodeUpdate1);
NodeUpdateSchedulerEvent nodeUpdate2 = new NodeUpdateSchedulerEvent(node2);
scheduler.handle(nodeUpdate2);
NodeUpdateSchedulerEvent nodeUpdate3 = new NodeUpdateSchedulerEvent(node3);
scheduler.handle(nodeUpdate3);
NodeUpdateSchedulerEvent nodeUpdate4 = new NodeUpdateSchedulerEvent(node4);
scheduler.handle(nodeUpdate4);
}
assertEquals(4, scheduler.getSchedulerApp(app1).getLiveContainers().size());
assertEquals(4, scheduler.getSchedulerApp(app2).getLiveContainers().size());
assertEquals(4, scheduler.getSchedulerApp(app3).getLiveContainers().size());
// Now new requests arrive from queues D
ApplicationAttemptId app4 =
createSchedulingRequest(1 * 1024, "queueD", "user1", 4, 1);
scheduler.update();
FSLeafQueue schedD =
scheduler.getQueueManager().getLeafQueue("queueD", true);
// After minSharePreemptionTime has passed, 2G resource should preempted from
// queueB to queueD
clock.tickSec(6);
assertEquals(2048,
scheduler.resourceDeficit(schedD, clock.getTime()).getMemory());
scheduler.preemptResources(Resources.createResource(2 * 1024));
// now only app2 is selected to be preempted
assertTrue("App2 should have container to be preempted",
!Collections.disjoint(
scheduler.getSchedulerApp(app2).getLiveContainers(),
scheduler.getSchedulerApp(app2).getPreemptionContainers()));
assertTrue("App1 should not have container to be preempted",
Collections.disjoint(
scheduler.getSchedulerApp(app1).getLiveContainers(),
scheduler.getSchedulerApp(app1).getPreemptionContainers()));
assertTrue("App3 should not have container to be preempted",
Collections.disjoint(
scheduler.getSchedulerApp(app3).getLiveContainers(),
scheduler.getSchedulerApp(app3).getPreemptionContainers()));
// Pretend 20 seconds have passed
clock.tickSec(20);
scheduler.preemptResources(Resources.createResource(2 * 1024));
for (int i = 0; i < 3; i++) {
NodeUpdateSchedulerEvent nodeUpdate1 = new NodeUpdateSchedulerEvent(node1);
scheduler.handle(nodeUpdate1);
NodeUpdateSchedulerEvent nodeUpdate2 = new NodeUpdateSchedulerEvent(node2);
scheduler.handle(nodeUpdate2);
NodeUpdateSchedulerEvent nodeUpdate3 = new NodeUpdateSchedulerEvent(node3);
scheduler.handle(nodeUpdate3);
NodeUpdateSchedulerEvent nodeUpdate4 = new NodeUpdateSchedulerEvent(node4);
scheduler.handle(nodeUpdate4);
}
// after preemption
assertEquals(4, scheduler.getSchedulerApp(app1).getLiveContainers().size());
assertEquals(2, scheduler.getSchedulerApp(app2).getLiveContainers().size());
assertEquals(4, scheduler.getSchedulerApp(app3).getLiveContainers().size());
assertEquals(2, scheduler.getSchedulerApp(app4).getLiveContainers().size());
}
@Test
/**
* Tests the decision to preempt tasks when allowPreemptionFrom is set false on
* all queues.
* Then none of them would be preempted actually.
* 1, Queues as follow:
* queueA(non-preemptable)
* queueB(non-preemptable)
* parentQueue(non-preemptable)
* --queueC(preemptable)
* parentQueue(preemptable)
* --queueD(non-preemptable)
* 2, Submit request to queueB, queueC, queueD, and all of them are over MinShare
* 3, Now all resource are occupied
* 4, Submit request to queueA, and need to preempt resource from other queues
* 5, None of queues would be preempted.
*/
public void testPreemptionDecisionWhenPreemptionDisabledOnAllQueues()
throws Exception {
conf.set(FairSchedulerConfiguration.ALLOCATION_FILE, ALLOC_FILE);
ControlledClock clock = new ControlledClock();
scheduler.setClock(clock);
PrintWriter out = new PrintWriter(new FileWriter(ALLOC_FILE));
out.println("<?xml version=\"1.0\"?>");
out.println("<allocations>");
out.println("<queue name=\"default\">");
out.println("<maxResources>0mb,0vcores</maxResources>");
out.println("</queue>");
out.println("<queue name=\"queueA\">");
out.println("<weight>.25</weight>");
out.println("<minResources>2048mb,0vcores</minResources>");
out.println("<allowPreemptionFrom>false</allowPreemptionFrom>");
out.println("</queue>");
out.println("<queue name=\"queueB\">");
out.println("<weight>.25</weight>");
out.println("<minResources>1024mb,0vcores</minResources>");
out.println("<allowPreemptionFrom>false</allowPreemptionFrom>");
out.println("</queue>");
out.println("<queue name=\"parentQueue1\">");
out.println("<allowPreemptionFrom>false</allowPreemptionFrom>");
out.println("<queue name=\"queueC\">");
out.println("<weight>.25</weight>");
out.println("<minResources>1024mb,0vcores</minResources>");
out.println("</queue>");
out.println("</queue>");
out.println("<queue name=\"parentQueue2\">");
out.println("<queue name=\"queueD\">");
out.println("<weight>.25</weight>");
out.println("<minResources>1024mb,0vcores</minResources>");
out.println("<allowPreemptionFrom>false</allowPreemptionFrom>");
out.println("</queue>");
out.println("</queue>");
out.println("<defaultMinSharePreemptionTimeout>5</defaultMinSharePreemptionTimeout>");
out.println("<defaultFairSharePreemptionTimeout>10</defaultFairSharePreemptionTimeout>");
out.println("<defaultFairSharePreemptionThreshold>.5</defaultFairSharePreemptionThreshold>");
out.println("</allocations>");
out.close();
scheduler.init(conf);
scheduler.start();
scheduler.reinitialize(conf, resourceManager.getRMContext());
// Create four nodes(3G each)
RMNode node1 =
MockNodes.newNodeInfo(1, Resources.createResource(3 * 1024, 3), 1,
"127.0.0.1");
NodeAddedSchedulerEvent nodeEvent1 = new NodeAddedSchedulerEvent(node1);
scheduler.handle(nodeEvent1);
RMNode node2 =
MockNodes.newNodeInfo(1, Resources.createResource(3 * 1024, 3), 2,
"127.0.0.2");
NodeAddedSchedulerEvent nodeEvent2 = new NodeAddedSchedulerEvent(node2);
scheduler.handle(nodeEvent2);
RMNode node3 =
MockNodes.newNodeInfo(1, Resources.createResource(3 * 1024, 3), 3,
"127.0.0.3");
NodeAddedSchedulerEvent nodeEvent3 = new NodeAddedSchedulerEvent(node3);
scheduler.handle(nodeEvent3);
RMNode node4 =
MockNodes.newNodeInfo(1, Resources.createResource(3 * 1024, 3), 4,
"127.0.0.4");
NodeAddedSchedulerEvent nodeEvent4 = new NodeAddedSchedulerEvent(node4);
scheduler.handle(nodeEvent4);
// Submit apps to queueB, queueC, queueD
// now all resource of the cluster is occupied
ApplicationAttemptId app1 =
createSchedulingRequest(1 * 1024, "queueB", "user1", 4, 1);
ApplicationAttemptId app2 =
createSchedulingRequest(1 * 1024, "parentQueue1.queueC", "user1", 4, 2);
ApplicationAttemptId app3 =
createSchedulingRequest(1 * 1024, "parentQueue2.queueD", "user1", 4, 3);
scheduler.update();
// Sufficient node check-ins to fully schedule containers
for (int i = 0; i < 3; i++) {
NodeUpdateSchedulerEvent nodeUpdate1 = new NodeUpdateSchedulerEvent(node1);
scheduler.handle(nodeUpdate1);
NodeUpdateSchedulerEvent nodeUpdate2 = new NodeUpdateSchedulerEvent(node2);
scheduler.handle(nodeUpdate2);
NodeUpdateSchedulerEvent nodeUpdate3 = new NodeUpdateSchedulerEvent(node3);
scheduler.handle(nodeUpdate3);
NodeUpdateSchedulerEvent nodeUpdate4 = new NodeUpdateSchedulerEvent(node4);
scheduler.handle(nodeUpdate4);
}
assertEquals(4, scheduler.getSchedulerApp(app1).getLiveContainers().size());
assertEquals(4, scheduler.getSchedulerApp(app2).getLiveContainers().size());
assertEquals(4, scheduler.getSchedulerApp(app3).getLiveContainers().size());
// Now new requests arrive from queues A
ApplicationAttemptId app4 =
createSchedulingRequest(1 * 1024, "queueA", "user1", 4, 1);
scheduler.update();
FSLeafQueue schedA =
scheduler.getQueueManager().getLeafQueue("queueA", true);
// After minSharePreemptionTime has passed, resource deficit is 2G
clock.tickSec(6);
assertEquals(2048,
scheduler.resourceDeficit(schedA, clock.getTime()).getMemory());
scheduler.preemptResources(Resources.createResource(2 * 1024));
// now none app is selected to be preempted
assertTrue("App1 should have container to be preempted",
Collections.disjoint(
scheduler.getSchedulerApp(app1).getLiveContainers(),
scheduler.getSchedulerApp(app1).getPreemptionContainers()));
assertTrue("App2 should not have container to be preempted",
Collections.disjoint(
scheduler.getSchedulerApp(app2).getLiveContainers(),
scheduler.getSchedulerApp(app2).getPreemptionContainers()));
assertTrue("App3 should not have container to be preempted",
Collections.disjoint(
scheduler.getSchedulerApp(app3).getLiveContainers(),
scheduler.getSchedulerApp(app3).getPreemptionContainers()));
// Pretend 20 seconds have passed
clock.tickSec(20);
scheduler.preemptResources(Resources.createResource(2 * 1024));
for (int i = 0; i < 3; i++) {
NodeUpdateSchedulerEvent nodeUpdate1 = new NodeUpdateSchedulerEvent(node1);
scheduler.handle(nodeUpdate1);
NodeUpdateSchedulerEvent nodeUpdate2 = new NodeUpdateSchedulerEvent(node2);
scheduler.handle(nodeUpdate2);
NodeUpdateSchedulerEvent nodeUpdate3 = new NodeUpdateSchedulerEvent(node3);
scheduler.handle(nodeUpdate3);
NodeUpdateSchedulerEvent nodeUpdate4 = new NodeUpdateSchedulerEvent(node4);
scheduler.handle(nodeUpdate4);
}
// after preemption
assertEquals(4, scheduler.getSchedulerApp(app1).getLiveContainers().size());
assertEquals(4, scheduler.getSchedulerApp(app2).getLiveContainers().size());
assertEquals(4, scheduler.getSchedulerApp(app3).getLiveContainers().size());
assertEquals(0, scheduler.getSchedulerApp(app4).getLiveContainers().size());
}
@Test
public void testBackwardsCompatiblePreemptionConfiguration() throws Exception {
conf.set(FairSchedulerConfiguration.ALLOCATION_FILE, ALLOC_FILE);