How to use

sortContainers

method

in

org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy

@Test
public void testContainerOrdering(){
 List<RMContainer> containers = new ArrayList<RMContainer>();
 ApplicationAttemptId appAttId = ApplicationAttemptId.newInstance(
   ApplicationId.newInstance(TS, 10), 0);
 // create a set of containers
 RMContainer rm1 = mockContainer(appAttId, 5, mock(Resource.class), 3);
 RMContainer rm2 = mockContainer(appAttId, 3, mock(Resource.class), 3);
 RMContainer rm3 = mockContainer(appAttId, 2, mock(Resource.class), 2);
 RMContainer rm4 = mockContainer(appAttId, 1, mock(Resource.class), 2);
 RMContainer rm5 = mockContainer(appAttId, 4, mock(Resource.class), 1);
 // insert them in non-sorted order
 containers.add(rm3);
 containers.add(rm2);
 containers.add(rm1);
 containers.add(rm5);
 containers.add(rm4);
 // sort them
 ProportionalCapacityPreemptionPolicy.sortContainers(containers);
 // verify the "priority"-first, "reverse container-id"-second
 // ordering is enforced correctly
 assert containers.get(0).equals(rm1);
 assert containers.get(1).equals(rm2);
 assert containers.get(2).equals(rm3);
 assert containers.get(3).equals(rm4);
 assert containers.get(4).equals(rm5);
}

 new ArrayList<RMContainer>(app.getLiveContainers());
sortContainers(containers);

 new ArrayList<RMContainer>(app.getLiveContainers());
sortContainers(containers);