chhinlinghean created YARN-11745:
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Summary: YARN ResourceManager throws
java.lang.IllegalArgumentExceptio: Comparison method violates its general
contract!
Key: YARN-11745
URL: https://issues.apache.org/jira/browse/YARN-11745
Project: Hadoop YARN
Issue Type: Bug
Components: yarn
Affects Versions: 3.4.0
Reporter: chhinlinghean
Assignee: chhinlinghean
The TimSort Transitivity rules got broken down when comparing both queues with
resources (0, 0), another queue with resources(some number, some number) and
with the same queues absolute capacity.
*Steps reproduce with Unit test:*
{code:java}
package org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.policy;
import org.apache.hadoop.yarn.api.records.Priority;
import org.apache.hadoop.yarn.api.records.Resource;
import
org.apache.hadoop.yarn.server.resourcemanager.scheduler.QueueResourceQuotas;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CSQueue;
import
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.QueueCapacities;
import org.junit.Before;
import org.junit.Test;
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
public class TestThrowingIllegalArgumentException {
private List<Resource> resources;
private String partition;
private Random random;
private CSQueue mockQueue;
@Before
public void setUp() {
// Initialize reusable objects
partition = "testPartition";
resources = new ArrayList<>();
resources.add(Resource.newInstance(0, 0));
resources.add(Resource.newInstance(8, 0));
resources.add(Resource.newInstance(8, 8));
random = new Random();
mockQueue = mock(CSQueue.class);
}
@Test
public void testComparatorClass_WhenThrowingIllegalArgumentException() {
List<PriorityUtilizationQueueOrderingPolicy.PriorityQueueResourcesForSorting>
collect =
IntStream.range(0, 1000)
.mapToObj(i -> crtTestElem())
.collect(Collectors.toList());
Collections.sort(collect, new
PriorityUtilizationQueueOrderingPolicy(true)
.new PriorityQueueComparator(partition));
}
private
PriorityUtilizationQueueOrderingPolicy.PriorityQueueResourcesForSorting
crtTestElem() {
QueueCapacities mockQueueCapacities = mock(QueueCapacities.class);
when(mockQueueCapacities.getAbsoluteUsedCapacity(partition)).thenReturn(0.0f);
when(mockQueueCapacities.getUsedCapacity(partition)).thenReturn(1.3f);
when(mockQueueCapacities.getAbsoluteCapacity(partition)).thenReturn(4.0f);
when(mockQueue.getQueueCapacities()).thenReturn(mockQueueCapacities);
when(mockQueue.getPriority()).thenReturn(Priority.newInstance(5));
when(mockQueue.getAccessibleNodeLabels()).thenReturn(Collections.singleton("label1"));
QueueResourceQuotas randomQuotas = mock(QueueResourceQuotas.class);
Resource randomResource =
resources.get(random.nextInt(resources.size()));
when(randomQuotas.getConfiguredMinResource(partition)).thenReturn(randomResource);
when(mockQueue.getQueueResourceQuotas()).thenReturn(randomQuotas);
// Construct and return a test element
return new
PriorityUtilizationQueueOrderingPolicy.PriorityQueueResourcesForSorting(
mockQueue, partition
);
}
} {code}
*How to fix it?*
Instead of checking with an AND condition when both queues resources are not
none to compare its resources, we should check with an OR condition instead.
Because in the case one queue's resource is none another one is not we should
still compare by its resources.
Previous code:
{code:java}
if (!minEffRes1.equals(Resources.none()) &&
!minEffRes2.equals(Resources.none())) {
return minEffRes2.compareTo(minEffRes1);
}
float abs1 = q1Sort.absoluteCapacity;
float abs2 = q2Sort.absoluteCapacity;
return Float.compare(abs2, abs1); {code}
Changed code to:
{code:java}
if (!minEffRes1.equals(Resources.none()) ||
!minEffRes2.equals(Resources.none())) {
return minEffRes2.compareTo(minEffRes1);
}
float abs1 = q1Sort.absoluteCapacity;
float abs2 = q2Sort.absoluteCapacity;
return Float.compare(abs2, abs1); {code}
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