/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity;
import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
import org.apache.hadoop.yarn.api.records.ContainerId;
import org.apache.hadoop.yarn.api.records.Priority;
import org.apache.hadoop.yarn.api.records.ResourceRequest;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.server.resourcemanager.MockAM;
import org.apache.hadoop.yarn.server.resourcemanager.MockNM;
import org.apache.hadoop.yarn.server.resourcemanager.MockRM;
import org.apache.hadoop.yarn.server.resourcemanager.monitor.SchedulingEditPolicy;
import org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy;
import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMApp;
import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainer;
import org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.common.fica.FiCaSchedulerApp;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.event.NodeUpdateSchedulerEvent;
import org.apache.hadoop.yarn.util.resource.Resources;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Set;
public class TestCapacitySchedulerSurgicalPreemption
extends CapacitySchedulerPreemptionTestBase {
@Override
@Before
public void setUp() throws Exception {
super.setUp();
conf.setBoolean(
CapacitySchedulerConfiguration.PREEMPTION_SELECT_CANDIDATES_FOR_RESERVED_CONTAINERS,
true);
}
@Test(timeout = 60000)
public void testSimpleSurgicalPreemption()
throws Exception {
/**
* Test case: Submit two application (app1/app2) to different queues, queue
* structure:
*
* <pre>
* Root
* / | \
* a b c
* 10 20 70
* </pre>
*
* 1) Two nodes (n1/n2) in the cluster, each of them has 20G.
*
* 2) app1 submit to queue-a first, it asked 32 * 1G containers
* We will allocate 16 on n1 and 16 on n2.
*
* 3) app2 submit to queue-c, ask for one 1G container (for AM)
*
* 4) app2 asks for another 6G container, it will be reserved on n1
*
* Now: we have:
* n1: 17 from app1, 1 from app2, and 1 reserved from app2
* n2: 16 from app1.
*
* After preemption, we should expect:
* Preempt 4 containers from app1 on n1.
*/
MockRM rm1 = new MockRM(conf);
rm1.getRMContext().setNodeLabelManager(mgr);
rm1.start();
MockNM nm1 = rm1.registerNode("h1:1234", 20 * GB);
MockNM nm2 = rm1.registerNode("h2:1234", 20 * GB);
CapacityScheduler cs = (CapacityScheduler) rm1.getResourceScheduler();
RMNode rmNode1 = rm1.getRMContext().getRMNodes().get(nm1.getNodeId());
RMNode rmNode2 = rm1.getRMContext().getRMNodes().get(nm2.getNodeId());
// launch an app to queue, AM container should be launched in nm1
RMApp app1 = rm1.submitApp(1 * GB, "app", "user", null, "a");
MockAM am1 = MockRM.launchAndRegisterAM(app1, rm1, nm1);
am1.allocate("*", 1 * GB, 32, new ArrayList<ContainerId>());
// Do allocation for node1/node2
for (int i = 0; i < 32; i++) {
cs.handle(new NodeUpdateSchedulerEvent(rmNode1));
cs.handle(new NodeUpdateSchedulerEvent(rmNode2));
}
// App1 should have 33 containers now
FiCaSchedulerApp schedulerApp1 = cs.getApplicationAttempt(
am1.getApplicationAttemptId());
Assert.assertEquals(33, schedulerApp1.getLiveContainers().size());
// 17 from n1 and 16 from n2
waitNumberOfLiveContainersOnNodeFromApp(cs.getNode(rmNode1.getNodeID()),
am1.getApplicationAttemptId(), 17);
waitNumberOfLiveContainersOnNodeFromApp(cs.getNode(rmNode2.getNodeID()),
am1.getApplicationAttemptId(), 16);
// Submit app2 to queue-c and asks for a 1G container for AM
RMApp app2 = rm1.submitApp(1 * GB, "app", "user", null, "c");
MockAM am2 = MockRM.launchAndRegisterAM(app2, rm1, nm1);
// NM1/NM2 has available resource = 2G/4G
Assert.assertEquals(2 * GB, cs.getNode(nm1.getNodeId())
.getAvailableResource().getMemorySize());
Assert.assertEquals(4 * GB, cs.getNode(nm2.getNodeId())
.getAvailableResource().getMemorySize());
// AM asks for a 1 * GB container
am2.allocate(Arrays.asList(ResourceRequest
.newInstance(Priority.newInstance(1), ResourceRequest.ANY,
Resources.createResource(6 * GB), 1)), null);
// Call allocation once on n1, we should expect the container reserved on n1
cs.handle(new NodeUpdateSchedulerEvent(rmNode1));
Assert.assertNotNull(cs.getNode(nm1.getNodeId()).getReservedContainer());
// Get edit policy and do one update
SchedulingEditPolicy editPolicy = getSchedulingEditPolicy(rm1);
// Call edit schedule twice, and check if 4 containers from app1 at n1 killed
editPolicy.editSchedule();
editPolicy.editSchedule();
waitNumberOfLiveContainersFromApp(schedulerApp1, 29);
// 13 from n1 (4 preempted) and 16 from n2
waitNumberOfLiveContainersOnNodeFromApp(cs.getNode(rmNode1.getNodeID()),
am1.getApplicationAttemptId(), 13);
waitNumberOfLiveContainersOnNodeFromApp(cs.getNode(rmNode2.getNodeID()),
am1.getApplicationAttemptId(), 16);
rm1.close();
}
@Test(timeout = 60000)
public void testSurgicalPreemptionWithAvailableResource()
throws Exception {
/**
* Test case: Submit two application (app1/app2) to different queues, queue
* structure:
*
* <pre>
* Root
* / | \
* a b c
* 10 20 70
* </pre>
*
* 1) Two nodes (n1/n2) in the cluster, each of them has 20G.
*
* 2) app1 submit to queue-b, asks for 1G * 5
*
* 3) app2 submit to queue-c, ask for one 4G container (for AM)
*
* After preemption, we should expect:
* Preempt 3 containers from app1 and AM of app2 successfully allocated.
*/
MockRM rm1 = new MockRM(conf);
rm1.getRMContext().setNodeLabelManager(mgr);
rm1.start();
MockNM nm1 = rm1.registerNode("h1:1234", 20 * GB);
MockNM nm2 = rm1.registerNode("h2:1234", 20 * GB);
CapacityScheduler cs = (CapacityScheduler) rm1.getResourceScheduler();
RMNode rmNode1 = rm1.getRMContext().getRMNodes().get(nm1.getNodeId());
RMNode rmNode2 = rm1.getRMContext().getRMNodes().get(nm2.getNodeId());
// launch an app to queue, AM container should be launched in nm1
RMApp app1 = rm1.submitApp(1 * GB, "app", "user", null, "a");
MockAM am1 = MockRM.launchAndRegisterAM(app1, rm1, nm1);
am1.allocate("*", 1 * GB, 38, new ArrayList<ContainerId>());
// Do allocation for node1/node2
for (int i = 0; i < 38; i++) {
cs.handle(new NodeUpdateSchedulerEvent(rmNode1));
cs.handle(new NodeUpdateSchedulerEvent(rmNode2));
}
// App1 should have 31 containers now
FiCaSchedulerApp schedulerApp1 = cs.getApplicationAttempt(
am1.getApplicationAttemptId());
Assert.assertEquals(39, schedulerApp1.getLiveContainers().size());
// 17 from n1 and 16 from n2
waitNumberOfLiveContainersOnNodeFromApp(cs.getNode(rmNode1.getNodeID()),
am1.getApplicationAttemptId(), 20);
waitNumberOfLiveContainersOnNodeFromApp(cs.getNode(rmNode2.getNodeID()),
am1.getApplicationAttemptId(), 19);
// Submit app2 to queue-c and asks for a 4G container for AM
RMApp app2 = rm1.submitApp(4 * GB, "app", "user", null, "c");
FiCaSchedulerApp schedulerApp2 = cs.getApplicationAttempt(
ApplicationAttemptId.newInstance(app2.getApplicationId(), 1));
// Call editSchedule: containers are selected to be preemption candidate
ProportionalCapacityPreemptionPolicy editPolicy =
(ProportionalCapacityPreemptionPolicy) getSchedulingEditPolicy(rm1);
editPolicy.editSchedule();
Assert.assertEquals(3, editPolicy.getToPreemptContainers().size());
// Call editSchedule again: selected containers are killed
editPolicy.editSchedule();
waitNumberOfLiveContainersFromApp(schedulerApp1, 36);
// Call allocation, containers are reserved
cs.handle(new NodeUpdateSchedulerEvent(rmNode1));
cs.handle(new NodeUpdateSchedulerEvent(rmNode2));
waitNumberOfReservedContainersFromApp(schedulerApp2, 1);
// Call editSchedule twice and allocation once, container should get allocated
editPolicy.editSchedule();
editPolicy.editSchedule();
int tick = 0;
while (schedulerApp2.getLiveContainers().size() != 1 && tick < 10) {
cs.handle(new NodeUpdateSchedulerEvent(rmNode1));
cs.handle(new NodeUpdateSchedulerEvent(rmNode2));
tick++;
Thread.sleep(100);
}
waitNumberOfReservedContainersFromApp(schedulerApp2, 0);
rm1.close();
}
@Test(timeout = 60000)
public void testPriorityPreemptionWhenAllQueuesAreBelowGuaranteedCapacities()
throws Exception {
/**
* Test case: Submit two application (app1/app2) to different queues, queue
* structure:
*
* <pre>
* Root
* / | \
* a b c
* 10 20 70
* </pre>
*
* 1) Two nodes (n1/n2) in the cluster, each of them has 20G.
*
* 2) app1 submit to queue-b first, it asked 6 * 1G containers
* We will allocate 4 on n1 (including AM) and 3 on n2.
*
* 3) app2 submit to queue-c, ask for one 18G container (for AM)
*
* After preemption, we should expect:
* Preempt 3 containers from app1 and AM of app2 successfully allocated.
*/
conf.setPUOrderingPolicyUnderUtilizedPreemptionEnabled(true);
conf.setPUOrderingPolicyUnderUtilizedPreemptionDelay(1000);
conf.setQueueOrderingPolicy(CapacitySchedulerConfiguration.ROOT,
CapacitySchedulerConfiguration.QUEUE_PRIORITY_UTILIZATION_ORDERING_POLICY);
// Queue c has higher priority than a/b
conf.setQueuePriority(CapacitySchedulerConfiguration.ROOT + ".c", 1);
MockRM rm1 = new MockRM(conf);
rm1.getRMContext().setNodeLabelManager(mgr);
rm1.start();
MockNM nm1 = rm1.registerNode("h1:1234", 20 * GB);
MockNM nm2 = rm1.registerNode("h2:1234", 20 * GB);
CapacityScheduler cs = (CapacityScheduler) rm1.getResourceScheduler();
RMNode rmNode1 = rm1.getRMContext().getRMNodes().get(nm1.getNodeId());
RMNode rmNode2 = rm1.getRMContext().getRMNodes().get(nm2.getNodeId());
// launch an app to queue, AM container should be launched in nm1
RMApp app1 = rm1.submitApp(1 * GB, "app", "user", null, "b");
MockAM am1 = MockRM.launchAndRegisterAM(app1, rm1, nm1);
am1.allocate("*", 1 * GB, 6, new ArrayList<ContainerId>());
// Do allocation for node1/node2
for (int i = 0; i < 3; i++) {
cs.handle(new NodeUpdateSchedulerEvent(rmNode1));
cs.handle(new NodeUpdateSchedulerEvent(rmNode2));
}
// App1 should have 7 containers now, so the abs-used-cap of b is
// 7 / 40 = 17.5% < 20% (guaranteed)
FiCaSchedulerApp schedulerApp1 = cs.getApplicationAttempt(
am1.getApplicationAttemptId());
Assert.assertEquals(7, schedulerApp1.getLiveContainers().size());
// 4 from n1 and 3 from n2
waitNumberOfLiveContainersOnNodeFromApp(cs.getNode(rmNode1.getNodeID()),
am1.getApplicationAttemptId(), 4);
waitNumberOfLiveContainersOnNodeFromApp(cs.getNode(rmNode2.getNodeID()),
am1.getApplicationAttemptId(), 3);
// Submit app2 to queue-c and asks for a 1G container for AM
RMApp app2 = rm1.submitApp(18 * GB, "app", "user", null, "c");
FiCaSchedulerApp schedulerApp2 = cs.getApplicationAttempt(
ApplicationAttemptId.newInstance(app2.getApplicationId(), 1));
while (cs.getNode(rmNode1.getNodeID()).getReservedContainer() == null) {
cs.handle(new NodeUpdateSchedulerEvent(rmNode1));
Thread.sleep(10);
}
// Call editSchedule immediately: containers are not selected
ProportionalCapacityPreemptionPolicy editPolicy =
(ProportionalCapacityPreemptionPolicy) getSchedulingEditPolicy(rm1);
editPolicy.editSchedule();
Assert.assertEquals(0, editPolicy.getToPreemptContainers().size());
// Sleep the timeout interval, we should be able to see containers selected
Thread.sleep(1000);
editPolicy.editSchedule();
Assert.assertEquals(2, editPolicy.getToPreemptContainers().size());
// Call editSchedule again: selected containers are killed, and new AM
// container launched
editPolicy.editSchedule();
// Do allocation till reserved container allocated
while (cs.getNode(rmNode1.getNodeID()).getReservedContainer() != null) {
cs.handle(new NodeUpdateSchedulerEvent(rmNode1));
Thread.sleep(10);
}
waitNumberOfLiveContainersFromApp(schedulerApp2, 1);
rm1.close();
}
@Test(timeout = 300000)
public void testPriorityPreemptionRequiresMoveReservation()
throws Exception {
/**
* Test case: Submit two application (app1/app2) to different queues, queue
* structure:
*
* <pre>
* Root
* / | \
* a b c
* 10 20 70
* </pre>
*
* 1) 3 nodes in the cluster, 10G for each
*
* 2) app1 submit to queue-b first, it asked 2G each,
* it can get 2G on n1 (AM), 2 * 2G on n2
*
* 3) app2 submit to queue-c, with 2G AM container (allocated on n3)
* app2 requires 9G resource, which will be reserved on n3
*
* We should expect container unreserved from n3 and allocated on n1/n2
*/
conf.setPUOrderingPolicyUnderUtilizedPreemptionEnabled(true);
conf.setPUOrderingPolicyUnderUtilizedPreemptionDelay(1000);
conf.setQueueOrderingPolicy(CapacitySchedulerConfiguration.ROOT,
CapacitySchedulerConfiguration.QUEUE_PRIORITY_UTILIZATION_ORDERING_POLICY);
conf.setPUOrderingPolicyUnderUtilizedPreemptionMoveReservation(true);
// Queue c has higher priority than a/b
conf.setQueuePriority(CapacitySchedulerConfiguration.ROOT + ".c", 1);
MockRM rm1 = new MockRM(conf);
rm1.getRMContext().setNodeLabelManager(mgr);
rm1.start();
MockNM nm1 = rm1.registerNode("h1:1234", 10 * GB);
MockNM nm2 = rm1.registerNode("h2:1234", 10 * GB);
MockNM nm3 = rm1.registerNode("h3:1234", 10 * GB);
CapacityScheduler cs = (CapacityScheduler) rm1.getResourceScheduler();
RMNode rmNode1 = rm1.getRMContext().getRMNodes().get(nm1.getNodeId());
RMNode rmNode2 = rm1.getRMContext().getRMNodes().get(nm2.getNodeId());
RMNode rmNode3 = rm1.getRMContext().getRMNodes().get(nm3.getNodeId());
// launch an app to queue, AM container should be launched in nm1
RMApp app1 = rm1.submitApp(2 * GB, "app", "user", null, "b");
MockAM am1 = MockRM.launchAndRegisterAM(app1, rm1, nm1);
am1.allocate("*", 2 * GB, 2, new ArrayList<ContainerId>());
// Do allocation for node2 twice
for (int i = 0; i < 2; i++) {
cs.handle(new NodeUpdateSchedulerEvent(rmNode2));
cs.handle(new NodeUpdateSchedulerEvent(rmNode2));
}
FiCaSchedulerApp schedulerApp1 = cs.getApplicationAttempt(
am1.getApplicationAttemptId());
Assert.assertEquals(3, schedulerApp1.getLiveContainers().size());
// 1 from n1 and 2 from n2
waitNumberOfLiveContainersOnNodeFromApp(cs.getNode(rmNode1.getNodeID()),
am1.getApplicationAttemptId(), 1);
waitNumberOfLiveContainersOnNodeFromApp(cs.getNode(rmNode2.getNodeID()),
am1.getApplicationAttemptId(), 2);
// Submit app2 to queue-c and asks for a 2G container for AM, on n3
RMApp app2 = rm1.submitApp(2 * GB, "app", "user", null, "c");
MockAM am2 = MockRM.launchAndRegisterAM(app2, rm1, nm3);
FiCaSchedulerApp schedulerApp2 = cs.getApplicationAttempt(
ApplicationAttemptId.newInstance(app2.getApplicationId(), 1));
// Asks 1 * 9G container
am2.allocate("*", 9 * GB, 1, new ArrayList<ContainerId>());
// Do allocation for node3 once
cs.handle(new NodeUpdateSchedulerEvent(rmNode3));
// Make sure container reserved on node3
Assert.assertNotNull(
cs.getNode(rmNode3.getNodeID()).getReservedContainer());
// Call editSchedule immediately: nothing happens
ProportionalCapacityPreemptionPolicy editPolicy =
(ProportionalCapacityPreemptionPolicy) getSchedulingEditPolicy(rm1);
editPolicy.editSchedule();
Assert.assertNotNull(
cs.getNode(rmNode3.getNodeID()).getReservedContainer());
// Sleep the timeout interval, we should be able to see reserved container
// moved to n2 (n1 occupied by AM)
Thread.sleep(1000);
editPolicy.editSchedule();
Assert.assertNull(
cs.getNode(rmNode3.getNodeID()).getReservedContainer());
Assert.assertNotNull(
cs.getNode(rmNode2.getNodeID()).getReservedContainer());
Assert.assertEquals(am2.getApplicationAttemptId(), cs.getNode(
rmNode2.getNodeID()).getReservedContainer().getApplicationAttemptId());
// Do it again, we should see containers marked to be preempt
editPolicy.editSchedule();
Assert.assertEquals(2, editPolicy.getToPreemptContainers().size());
// Call editSchedule again: selected containers are killed
editPolicy.editSchedule();
// Do allocation till reserved container allocated
while (schedulerApp2.getLiveContainers().size() < 2) {
cs.handle(new NodeUpdateSchedulerEvent(rmNode2));
Thread.sleep(200);
}
waitNumberOfLiveContainersFromApp(schedulerApp1, 1);
rm1.close();
}
@Test(timeout = 60000)
public void testPriorityPreemptionOnlyTriggeredWhenDemandingQueueUnsatisfied()
throws Exception {
/**
* Test case: Submit two application (app1/app2) to different queues, queue
* structure:
*
* <pre>
* Root
* / | \
* a b c
* 10 20 70
* </pre>
*
* 1) 10 nodes (n0-n9) in the cluster, each of them has 10G.
*
* 2) app1 submit to queue-b first, it asked 8 * 1G containers
* We will allocate 1 container on each of n0-n10
*
* 3) app2 submit to queue-c, ask for 10 * 10G containers (including AM)
*
* After preemption, we should expect:
* Preempt 7 containers from app1 and usage of app2 is 70%
*/
conf.setPUOrderingPolicyUnderUtilizedPreemptionEnabled(true);
conf.setPUOrderingPolicyUnderUtilizedPreemptionDelay(1000);
conf.setQueueOrderingPolicy(CapacitySchedulerConfiguration.ROOT,
CapacitySchedulerConfiguration.QUEUE_PRIORITY_UTILIZATION_ORDERING_POLICY);
// Queue c has higher priority than a/b
conf.setQueuePriority(CapacitySchedulerConfiguration.ROOT + ".c", 1);
MockRM rm1 = new MockRM(conf);
rm1.getRMContext().setNodeLabelManager(mgr);
rm1.start();
MockNM[] mockNMs = new MockNM[10];
for (int i = 0; i < 10; i++) {
mockNMs[i] = rm1.registerNode("h" + i + ":1234", 10 * GB);
}
CapacityScheduler cs = (CapacityScheduler) rm1.getResourceScheduler();
RMNode[] rmNodes = new RMNode[10];
for (int i = 0; i < 10; i++) {
rmNodes[i] = rm1.getRMContext().getRMNodes().get(mockNMs[i].getNodeId());
}
// launch an app to queue, AM container should be launched in nm1
RMApp app1 = rm1.submitApp(1 * GB, "app", "user", null, "b");
MockAM am1 = MockRM.launchAndRegisterAM(app1, rm1, mockNMs[0]);
am1.allocate("*", 1 * GB, 8, new ArrayList<ContainerId>());
// Do allocation for nm1-nm8
for (int i = 1; i < 9; i++) {
cs.handle(new NodeUpdateSchedulerEvent(rmNodes[i]));
}
// App1 should have 9 containers now, so the abs-used-cap of b is 9%
FiCaSchedulerApp schedulerApp1 = cs.getApplicationAttempt(
am1.getApplicationAttemptId());
Assert.assertEquals(9, schedulerApp1.getLiveContainers().size());
for (int i = 0; i < 9; i++) {
waitNumberOfLiveContainersOnNodeFromApp(cs.getNode(rmNodes[i].getNodeID()),
am1.getApplicationAttemptId(), 1);
}
// Submit app2 to queue-c and asks for a 10G container for AM
// Launch AM in NM9
RMApp app2 = rm1.submitApp(10 * GB, "app", "user", null, "c");
MockAM am2 = MockRM.launchAndRegisterAM(app2, rm1, mockNMs[9]);
FiCaSchedulerApp schedulerApp2 = cs.getApplicationAttempt(
ApplicationAttemptId.newInstance(app2.getApplicationId(), 1));
// Ask 10 * 10GB containers
am2.allocate("*", 10 * GB, 10, new ArrayList<ContainerId>());
// Do allocation for all nms
for (int i = 1; i < 10; i++) {
cs.handle(new NodeUpdateSchedulerEvent(rmNodes[i]));
}
// Check am2 reserved resource from nm1-nm9
for (int i = 1; i < 9; i++) {
Assert.assertNotNull("Should reserve on nm-" + i,
cs.getNode(rmNodes[i].getNodeID()).getReservedContainer());
}
// Sleep the timeout interval, we should be able to see 6 containers selected
// 6 (selected) + 1 (allocated) which makes target capacity to 70%
Thread.sleep(1000);
ProportionalCapacityPreemptionPolicy editPolicy =
(ProportionalCapacityPreemptionPolicy) getSchedulingEditPolicy(rm1);
editPolicy.editSchedule();
checkNumberOfPreemptionCandidateFromApp(editPolicy, 6,
am1.getApplicationAttemptId());
// Call editSchedule again: selected containers are killed
editPolicy.editSchedule();
waitNumberOfLiveContainersFromApp(schedulerApp1, 3);
// Do allocation for all nms
for (int i = 1; i < 10; i++) {
cs.handle(new NodeUpdateSchedulerEvent(rmNodes[i]));
}
waitNumberOfLiveContainersFromApp(schedulerApp2, 7);
waitNumberOfLiveContainersFromApp(schedulerApp1, 3);
rm1.close();
}
@Test(timeout = 600000)
public void testPriorityPreemptionFromHighestPriorityQueueAndOldestContainer()
throws Exception {
/**
* Test case: Submit two application (app1/app2) to different queues, queue
* structure:
*
* <pre>
* Root
* / | \
* a b c
* 45 45 10
* </pre>
*
* Priority of queue_a = 1
* Priority of queue_b = 2
*
* 1) 5 nodes (n0-n4) in the cluster, each of them has 4G.
*
* 2) app1 submit to queue-c first (AM=1G), it asked 4 * 1G containers
* We will allocate 1 container on each of n0-n4. AM on n4.
*
* 3) app2 submit to queue-a, AM container=0.5G, allocated on n0
* Ask for 2 * 3.5G containers. (Reserved on n0/n1)
*
* 4) app2 submit to queue-b, AM container=0.5G, allocated on n2
* Ask for 2 * 3.5G containers. (Reserved on n2/n3)
*
* First we will preempt container on n2 since it is the oldest container of
* Highest priority queue (b)
*/
// Total preemption = 1G per round, which is 5% of cluster resource (20G)
conf.setFloat(CapacitySchedulerConfiguration.TOTAL_PREEMPTION_PER_ROUND,
0.05f);
conf.setInt(YarnConfiguration.RM_SCHEDULER_MINIMUM_ALLOCATION_MB, 512);
conf.setPUOrderingPolicyUnderUtilizedPreemptionEnabled(true);
conf.setPUOrderingPolicyUnderUtilizedPreemptionDelay(1000);
conf.setQueueOrderingPolicy(CapacitySchedulerConfiguration.ROOT,
CapacitySchedulerConfiguration.QUEUE_PRIORITY_UTILIZATION_ORDERING_POLICY);
// A/B has higher priority
conf.setQueuePriority(CapacitySchedulerConfiguration.ROOT + ".a", 1);
conf.setQueuePriority(CapacitySchedulerConfiguration.ROOT + ".b", 2);
conf.setCapacity(CapacitySchedulerConfiguration.ROOT + ".a", 45f);
conf.setCapacity(CapacitySchedulerConfiguration.ROOT + ".b", 45f);
conf.setCapacity(CapacitySchedulerConfiguration.ROOT + ".c", 10f);
MockRM rm1 = new MockRM(conf);
rm1.getRMContext().setNodeLabelManager(mgr);
rm1.start();
MockNM[] mockNMs = new MockNM[5];
for (int i = 0; i < 5; i++) {
mockNMs[i] = rm1.registerNode("h" + i + ":1234", 4 * GB);
}
CapacityScheduler cs = (CapacityScheduler) rm1.getResourceScheduler();
RMNode[] rmNodes = new RMNode[5];
for (int i = 0; i < 5; i++) {
rmNodes[i] = rm1.getRMContext().getRMNodes().get(mockNMs[i].getNodeId());
}
// launch an app to queue, AM container should be launched in nm1
RMApp app1 = rm1.submitApp(1 * GB, "app", "user", null, "c");
MockAM am1 = MockRM.launchAndRegisterAM(app1, rm1, mockNMs[4]);
am1.allocate("*", 1 * GB, 4, new ArrayList<ContainerId>());
// Do allocation for nm1-nm8
for (int i = 0; i < 4; i++) {
cs.handle(new NodeUpdateSchedulerEvent(rmNodes[i]));
}
// App1 should have 5 containers now, one for each node
FiCaSchedulerApp schedulerApp1 = cs.getApplicationAttempt(
am1.getApplicationAttemptId());
Assert.assertEquals(5, schedulerApp1.getLiveContainers().size());
for (int i = 0; i < 5; i++) {
waitNumberOfLiveContainersOnNodeFromApp(cs.getNode(rmNodes[i].getNodeID()),
am1.getApplicationAttemptId(), 1);
}
// Submit app2 to queue-a and asks for a 0.5G container for AM (on n0)
RMApp app2 = rm1.submitApp(512, "app", "user", null, "a");
MockAM am2 = MockRM.launchAndRegisterAM(app2, rm1, mockNMs[0]);
FiCaSchedulerApp schedulerApp2 = cs.getApplicationAttempt(
ApplicationAttemptId.newInstance(app2.getApplicationId(), 1));
// Ask 2 * 3.5GB containers
am2.allocate("*", 3 * GB + 512, 2, new ArrayList<ContainerId>());
// Do allocation for n0-n1
for (int i = 0; i < 2; i++) {
cs.handle(new NodeUpdateSchedulerEvent(rmNodes[i]));
}
// Check am2 reserved resource from nm0-nm1
for (int i = 0; i < 2; i++) {
Assert.assertNotNull("Should reserve on nm-" + i,
cs.getNode(rmNodes[i].getNodeID()).getReservedContainer());
Assert.assertEquals(cs.getNode(rmNodes[i].getNodeID())
.getReservedContainer().getQueueName(), "a");
}
// Submit app3 to queue-b and asks for a 0.5G container for AM (on n2)
RMApp app3 = rm1.submitApp(512, "app", "user", null, "b");
MockAM am3 = MockRM.launchAndRegisterAM(app3, rm1, mockNMs[2]);
FiCaSchedulerApp schedulerApp3 = cs.getApplicationAttempt(
ApplicationAttemptId.newInstance(app3.getApplicationId(), 1));
// Ask 2 * 3.5GB containers
am3.allocate("*", 3 * GB + 512, 2, new ArrayList<ContainerId>());
// Do allocation for n2-n3
for (int i = 2; i < 4; i++) {
cs.handle(new NodeUpdateSchedulerEvent(rmNodes[i]));
}
// Check am2 reserved resource from nm2-nm3
for (int i = 2; i < 4; i++) {
Assert.assertNotNull("Should reserve on nm-" + i,
cs.getNode(rmNodes[i].getNodeID()).getReservedContainer());
Assert.assertEquals(cs.getNode(rmNodes[i].getNodeID())
.getReservedContainer().getQueueName(), "b");
}
// Sleep the timeout interval, we should be able to see 1 container selected
Thread.sleep(1000);
/* 1st container preempted is on n2 */
ProportionalCapacityPreemptionPolicy editPolicy =
(ProportionalCapacityPreemptionPolicy) getSchedulingEditPolicy(rm1);
editPolicy.editSchedule();
// We should have one to-preempt container, on node[2]
Set<RMContainer> selectedToPreempt =
editPolicy.getToPreemptContainers().keySet();
Assert.assertEquals(1, selectedToPreempt.size());
Assert.assertEquals(mockNMs[2].getNodeId(),
selectedToPreempt.iterator().next().getAllocatedNode());
// Call editSchedule again: selected containers are killed
editPolicy.editSchedule();
waitNumberOfLiveContainersFromApp(schedulerApp1, 4);
// Make sure the container killed, then do allocation for all nms
for (int i = 0; i < 4; i++) {
cs.handle(new NodeUpdateSchedulerEvent(rmNodes[i]));
}
waitNumberOfLiveContainersFromApp(schedulerApp1, 4);
waitNumberOfLiveContainersFromApp(schedulerApp2, 1);
waitNumberOfLiveContainersFromApp(schedulerApp3, 2);
/* 2nd container preempted is on n3 */
editPolicy.editSchedule();
// We should have one to-preempt container, on node[3]
selectedToPreempt =
editPolicy.getToPreemptContainers().keySet();
Assert.assertEquals(1, selectedToPreempt.size());
Assert.assertEquals(mockNMs[3].getNodeId(),
selectedToPreempt.iterator().next().getAllocatedNode());
// Call editSchedule again: selected containers are killed
editPolicy.editSchedule();
waitNumberOfLiveContainersFromApp(schedulerApp1, 3);
// Do allocation for all nms
for (int i = 0; i < 4; i++) {
cs.handle(new NodeUpdateSchedulerEvent(rmNodes[i]));
}
waitNumberOfLiveContainersFromApp(schedulerApp1, 3);
waitNumberOfLiveContainersFromApp(schedulerApp2, 1);
waitNumberOfLiveContainersFromApp(schedulerApp3, 3);
/* 3rd container preempted is on n0 */
editPolicy.editSchedule();
// We should have one to-preempt container, on node[0]
selectedToPreempt =
editPolicy.getToPreemptContainers().keySet();
Assert.assertEquals(1, selectedToPreempt.size());
Assert.assertEquals(mockNMs[0].getNodeId(),
selectedToPreempt.iterator().next().getAllocatedNode());
// Call editSchedule again: selected containers are killed
editPolicy.editSchedule();
waitNumberOfLiveContainersFromApp(schedulerApp1, 2);
// Do allocation for all nms
for (int i = 0; i < 4; i++) {
cs.handle(new NodeUpdateSchedulerEvent(rmNodes[i]));
}
waitNumberOfLiveContainersFromApp(schedulerApp1, 2);
waitNumberOfLiveContainersFromApp(schedulerApp2, 2);
waitNumberOfLiveContainersFromApp(schedulerApp3, 3);
/* 4th container preempted is on n1 */
editPolicy.editSchedule();
// We should have one to-preempt container, on node[0]
selectedToPreempt =
editPolicy.getToPreemptContainers().keySet();
Assert.assertEquals(1, selectedToPreempt.size());
Assert.assertEquals(mockNMs[1].getNodeId(),
selectedToPreempt.iterator().next().getAllocatedNode());
// Call editSchedule again: selected containers are killed
editPolicy.editSchedule();
waitNumberOfLiveContainersFromApp(schedulerApp1, 1);
// Do allocation for all nms
for (int i = 0; i < 4; i++) {
cs.handle(new NodeUpdateSchedulerEvent(rmNodes[i]));
}
waitNumberOfLiveContainersFromApp(schedulerApp1, 1);
waitNumberOfLiveContainersFromApp(schedulerApp2, 3);
waitNumberOfLiveContainersFromApp(schedulerApp3, 3);
rm1.close();
}
}