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

Class IntraQueueCandidatesSelector

java.lang.Object

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

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

public class IntraQueueCandidatesSelector
extends PreemptionCandidatesSelector

Identifies over utilized resources within a queue and tries to normalize them to resolve resource allocation anomalies w.r.t priority and user-limit.

Field Summary

Fields inherited from class org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.PreemptionCandidatesSelector

preemptionContext, rc

Method Summary

Modifier and Type	Method	Description
Map<org.apache.hadoop.yarn.api.records.ApplicationAttemptId,Set<RMContainer>>	selectCandidates(Map<org.apache.hadoop.yarn.api.records.ApplicationAttemptId,Set<RMContainer>> selectedCandidates, org.apache.hadoop.yarn.api.records.Resource clusterResource, org.apache.hadoop.yarn.api.records.Resource totalPreemptedResourceAllowed)	Get preemption candidates from computed resource sharing and already selected candidates.

Methods inherited from class org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.PreemptionCandidatesSelector

getMaximumKillWaitTimeMs, setMaximumKillWaitTime

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

selectCandidates

public Map<org.apache.hadoop.yarn.api.records.ApplicationAttemptId,Set<RMContainer>> selectCandidates(Map<org.apache.hadoop.yarn.api.records.ApplicationAttemptId,Set<RMContainer>> selectedCandidates,
 org.apache.hadoop.yarn.api.records.Resource clusterResource,
 org.apache.hadoop.yarn.api.records.Resource totalPreemptedResourceAllowed)

Description copied from class: PreemptionCandidatesSelector

Get preemption candidates from computed resource sharing and already selected candidates.

Specified by:

selectCandidates in class PreemptionCandidatesSelector

Parameters:

selectedCandidates - already selected candidates from previous policies

clusterResource - total resource

totalPreemptedResourceAllowed - how many resources allowed to be preempted in this round. Should be updated(in-place set) after the call

Returns:

merged selected candidates.