YARN-568. Add support for work preserving preemption to the FairScheduler.
Contributed by Carlo Curino and Sandy Ryza git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1480778 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Christopher Douglas
parent
d303f01297
commit
505fe26539
@ -10,9 +10,6 @@ Trunk - Unreleased
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Azure environments. (See breakdown of tasks below for subtasks and
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contributors)
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YARN-45. Add protocol for schedulers to request containers back from
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ApplicationMasters. (Carlo Curino, cdouglas)
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IMPROVEMENTS
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YARN-84. Use Builder to build RPC server. (Brandon Li via suresh)
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@ -129,6 +126,9 @@ Release 2.0.5-beta - UNRELEASED
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YARN-482. FS: Extend SchedulingMode to intermediate queues.
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(kkambatl via tucu)
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YARN-45. Add protocol for schedulers to request containers back from
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ApplicationMasters. (Carlo Curino, cdouglas)
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IMPROVEMENTS
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YARN-365. Change NM heartbeat handling to not generate a scheduler event
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@ -235,6 +235,9 @@ Release 2.0.5-beta - UNRELEASED
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tokens for app attempt so that RM can be restarted while preserving current
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applications. (Jian He via vinodkv)
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YARN-568. Add support for work preserving preemption to the FairScheduler.
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(Carlo Curino and Sandy Ryza via cdouglas)
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OPTIMIZATIONS
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BUG FIXES
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@ -21,7 +21,9 @@
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import java.io.IOException;
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import java.net.InetSocketAddress;
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import java.util.ArrayList;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ConcurrentMap;
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@ -39,6 +41,11 @@
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import org.apache.hadoop.yarn.api.protocolrecords.AllocateResponse;
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import org.apache.hadoop.yarn.api.protocolrecords.FinishApplicationMasterRequest;
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import org.apache.hadoop.yarn.api.protocolrecords.FinishApplicationMasterResponse;
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import org.apache.hadoop.yarn.api.protocolrecords.PreemptionContainer;
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import org.apache.hadoop.yarn.api.protocolrecords.PreemptionContract;
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import org.apache.hadoop.yarn.api.protocolrecords.PreemptionResourceRequest;
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import org.apache.hadoop.yarn.api.protocolrecords.StrictPreemptionContract;
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import org.apache.hadoop.yarn.api.protocolrecords.PreemptionMessage;
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import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterRequest;
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import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterResponse;
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import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
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@ -341,9 +348,65 @@ public AllocateResponse allocate(AllocateRequest request)
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}
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allocateResponse.setNumClusterNodes(this.rScheduler.getNumClusterNodes());
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// add preemption to the allocateResponse message (if any)
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allocateResponse.setPreemptionMessage(generatePreemptionMessage(allocation));
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return allocateResponse;
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}
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}
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private PreemptionMessage generatePreemptionMessage(Allocation allocation){
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PreemptionMessage pMsg = null;
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// assemble strict preemption request
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if (allocation.getStrictContainerPreemptions() != null) {
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pMsg =
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recordFactory.newRecordInstance(PreemptionMessage.class);
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StrictPreemptionContract pStrict =
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recordFactory.newRecordInstance(StrictPreemptionContract.class);
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Set<PreemptionContainer> pCont = new HashSet<PreemptionContainer>();
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for (ContainerId cId : allocation.getStrictContainerPreemptions()) {
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PreemptionContainer pc =
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recordFactory.newRecordInstance(PreemptionContainer.class);
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pc.setId(cId);
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pCont.add(pc);
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}
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pStrict.setContainers(pCont);
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pMsg.setStrictContract(pStrict);
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}
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// assemble negotiable preemption request
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if (allocation.getResourcePreemptions() != null &&
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allocation.getResourcePreemptions().size() > 0 &&
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allocation.getContainerPreemptions() != null &&
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allocation.getContainerPreemptions().size() > 0) {
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if (pMsg == null) {
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pMsg =
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recordFactory.newRecordInstance(PreemptionMessage.class);
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}
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PreemptionContract contract =
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recordFactory.newRecordInstance(PreemptionContract.class);
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Set<PreemptionContainer> pCont = new HashSet<PreemptionContainer>();
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for (ContainerId cId : allocation.getContainerPreemptions()) {
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PreemptionContainer pc =
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recordFactory.newRecordInstance(PreemptionContainer.class);
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pc.setId(cId);
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pCont.add(pc);
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}
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List<PreemptionResourceRequest> pRes = new ArrayList<PreemptionResourceRequest>();
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for (ResourceRequest crr : allocation.getResourcePreemptions()) {
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PreemptionResourceRequest prr =
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recordFactory.newRecordInstance(PreemptionResourceRequest.class);
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prr.setResourceRequest(crr);
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pRes.add(prr);
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}
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contract.setContainers(pCont);
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contract.setResourceRequest(pRes);
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pMsg.setContract(contract);
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}
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return pMsg;
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}
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public void registerAppAttempt(ApplicationAttemptId attemptId) {
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AllocateResponse response =
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@ -19,17 +19,43 @@
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package org.apache.hadoop.yarn.server.resourcemanager.scheduler;
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import java.util.List;
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import java.util.Set;
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import org.apache.hadoop.yarn.api.records.Container;
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import org.apache.hadoop.yarn.api.records.ContainerId;
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import org.apache.hadoop.yarn.api.records.Resource;
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import org.apache.hadoop.yarn.api.records.ResourceRequest;
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import org.apache.hadoop.yarn.factories.RecordFactory;
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import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
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public class Allocation {
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private final RecordFactory recordFactory =
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RecordFactoryProvider.getRecordFactory(null);
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final List<Container> containers;
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final Resource resourceLimit;
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final Set<ContainerId> strictContainers;
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final Set<ContainerId> fungibleContainers;
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final List<ResourceRequest> fungibleResources;
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public Allocation(List<Container> containers, Resource resourceLimit) {
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this(containers, resourceLimit, null, null, null);
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}
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public Allocation(List<Container> containers, Resource resourceLimit,
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Set<ContainerId> strictContainers) {
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this(containers, resourceLimit, strictContainers, null, null);
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}
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public Allocation(List<Container> containers, Resource resourceLimit,
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Set<ContainerId> strictContainers, Set<ContainerId> fungibleContainers,
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List<ResourceRequest> fungibleResources) {
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this.containers = containers;
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this.resourceLimit = resourceLimit;
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this.strictContainers = strictContainers;
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this.fungibleContainers = fungibleContainers;
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this.fungibleResources = fungibleResources;
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}
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public List<Container> getContainers() {
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@ -39,5 +65,17 @@ public List<Container> getContainers() {
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public Resource getResourceLimit() {
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return resourceLimit;
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}
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public Set<ContainerId> getStrictContainerPreemptions() {
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return strictContainers;
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}
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public Set<ContainerId> getContainerPreemptions() {
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return fungibleContainers;
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}
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public List<ResourceRequest> getResourcePreemptions() {
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return fungibleResources;
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}
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}
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@ -23,6 +23,7 @@
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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@ -83,7 +84,9 @@ public class FSSchedulerApp extends SchedulerApplication {
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final Map<Priority, Map<NodeId, RMContainer>> reservedContainers =
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new HashMap<Priority, Map<NodeId, RMContainer>>();
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final Map<RMContainer, Long> preemptionMap = new HashMap<RMContainer, Long>();
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/**
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* Count how many times the application has been given an opportunity
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* to schedule a task at each priority. Each time the scheduler
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@ -230,6 +233,9 @@ synchronized public void containerCompleted(RMContainer rmContainer,
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Resource containerResource = rmContainer.getContainer().getResource();
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queue.getMetrics().releaseResources(getUser(), 1, containerResource);
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Resources.subtractFrom(currentConsumption, containerResource);
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// remove from preemption map if it is completed
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preemptionMap.remove(rmContainer);
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}
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synchronized public List<Container> pullNewlyAllocatedContainers() {
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@ -572,4 +578,18 @@ public synchronized void resetAllowedLocalityLevel(Priority priority,
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" priority " + priority);
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allowedLocalityLevel.put(priority, level);
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}
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// related methods
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public void addPreemption(RMContainer container, long time) {
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assert preemptionMap.get(container) == null;
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preemptionMap.put(container, time);
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}
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public Long getContainerPreemptionTime(RMContainer container) {
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return preemptionMap.get(container);
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}
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public Set<RMContainer> getPreemptionContainers() {
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return preemptionMap.keySet();
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}
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}
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@ -24,8 +24,11 @@
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.concurrent.ConcurrentHashMap;
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import org.apache.commons.logging.Log;
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@ -155,10 +158,16 @@ public class FairScheduler implements ResourceScheduler {
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private Resource clusterCapacity =
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RecordFactoryProvider.getRecordFactory(null).newRecordInstance(Resource.class);
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// How often tasks are preempted (must be longer than a couple
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// How often tasks are preempted
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protected long preemptionInterval;
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// ms to wait before force killing stuff (must be longer than a couple
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// of heartbeats to give task-kill commands a chance to act).
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protected long preemptionInterval = 15000;
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protected long waitTimeBeforeKill;
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// Containers whose AMs have been warned that they will be preempted soon.
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private List<RMContainer> warnedContainers = new ArrayList<RMContainer>();
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protected boolean preemptionEnabled;
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protected boolean sizeBasedWeight; // Give larger weights to larger jobs
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protected WeightAdjuster weightAdjuster; // Can be null for no weight adjuster
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@ -335,34 +344,78 @@ protected void preemptResources(Collection<FSLeafQueue> scheds,
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// Sort containers into reverse order of priority
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Collections.sort(runningContainers, new Comparator<RMContainer>() {
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public int compare(RMContainer c1, RMContainer c2) {
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return c2.getContainer().getPriority().compareTo(
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int ret = c2.getContainer().getPriority().compareTo(
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c1.getContainer().getPriority());
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if (ret == 0) {
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return c2.getContainerId().compareTo(c1.getContainerId());
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}
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return ret;
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}
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});
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// Scan down the list of containers we've already warned and kill them
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// if we need to. Remove any containers from the list that we don't need
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// or that are no longer running.
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Iterator<RMContainer> warnedIter = warnedContainers.iterator();
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Set<RMContainer> preemptedThisRound = new HashSet<RMContainer>();
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while (warnedIter.hasNext()) {
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RMContainer container = warnedIter.next();
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if (container.getState() == RMContainerState.RUNNING &&
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Resources.greaterThan(RESOURCE_CALCULATOR, clusterCapacity,
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toPreempt, Resources.none())) {
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warnOrKillContainer(container, apps.get(container), queues.get(container));
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preemptedThisRound.add(container);
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Resources.subtractFrom(toPreempt, container.getContainer().getResource());
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} else {
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warnedIter.remove();
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}
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}
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// Scan down the sorted list of task statuses until we've killed enough
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// tasks, making sure we don't kill too many from any queue
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for (RMContainer container : runningContainers) {
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// Scan down the rest of the containers until we've preempted enough, making
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// sure we don't preempt too many from any queue
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Iterator<RMContainer> runningIter = runningContainers.iterator();
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while (runningIter.hasNext() &&
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Resources.greaterThan(RESOURCE_CALCULATOR, clusterCapacity,
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toPreempt, Resources.none())) {
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RMContainer container = runningIter.next();
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FSLeafQueue sched = queues.get(container);
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if (Resources.greaterThan(RESOURCE_CALCULATOR, clusterCapacity,
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sched.getResourceUsage(), sched.getFairShare())) {
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LOG.info("Preempting container (prio=" + container.getContainer().getPriority() +
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"res=" + container.getContainer().getResource() +
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") from queue " + sched.getName());
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ContainerStatus status = SchedulerUtils.createAbnormalContainerStatus(
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if (!preemptedThisRound.contains(container) &&
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Resources.greaterThan(RESOURCE_CALCULATOR, clusterCapacity,
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sched.getResourceUsage(), sched.getFairShare())) {
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warnOrKillContainer(container, apps.get(container), sched);
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warnedContainers.add(container);
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Resources.subtractFrom(toPreempt, container.getContainer().getResource());
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}
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}
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}
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private void warnOrKillContainer(RMContainer container, FSSchedulerApp app,
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FSLeafQueue queue) {
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LOG.info("Preempting container (prio=" + container.getContainer().getPriority() +
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"res=" + container.getContainer().getResource() +
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") from queue " + queue.getName());
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Long time = app.getContainerPreemptionTime(container);
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if (time != null) {
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// if we asked for preemption more than maxWaitTimeBeforeKill ms ago,
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// proceed with kill
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if (time + waitTimeBeforeKill < clock.getTime()) {
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ContainerStatus status =
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SchedulerUtils.createAbnormalContainerStatus(
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container.getContainerId(), SchedulerUtils.PREEMPTED_CONTAINER);
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// TODO: Not sure if this ever actually adds this to the list of cleanup
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// containers on the RMNode (see SchedulerNode.releaseContainer()).
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completedContainer(container, status, RMContainerEventType.KILL);
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toPreempt = Resources.subtract(toPreempt,
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container.getContainer().getResource());
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if (Resources.lessThanOrEqual(RESOURCE_CALCULATOR, clusterCapacity,
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toPreempt, Resources.none())) {
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break;
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}
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LOG.info("Killing container" + container +
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" (after waiting for premption for " +
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(clock.getTime() - time) + "ms)");
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}
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} else {
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// track the request in the FSSchedulerApp itself
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app.addPreemption(container, clock.getTime());
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}
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}
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@ -487,11 +540,11 @@ public Resource getClusterCapacity() {
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return clusterCapacity;
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}
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public Clock getClock() {
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public synchronized Clock getClock() {
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return clock;
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}
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protected void setClock(Clock clock) {
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protected synchronized void setClock(Clock clock) {
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this.clock = clock;
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}
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@ -746,10 +799,18 @@ public Allocation allocate(ApplicationAttemptId appAttemptId,
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LOG.debug("allocate:" +
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" applicationAttemptId=" + appAttemptId +
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" #ask=" + ask.size());
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}
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LOG.debug("Preempting " + application.getPreemptionContainers().size()
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+ " container(s)");
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}
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Set<ContainerId> preemptionContainerIds = new HashSet<ContainerId>();
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for (RMContainer container : application.getPreemptionContainers()) {
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preemptionContainerIds.add(container.getContainerId());
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}
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return new Allocation(application.pullNewlyAllocatedContainers(),
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application.getHeadroom());
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application.getHeadroom(), preemptionContainerIds);
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}
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}
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@ -950,7 +1011,9 @@ public synchronized void reinitialize(Configuration conf, RMContext rmContext)
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assignMultiple = this.conf.getAssignMultiple();
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maxAssign = this.conf.getMaxAssign();
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sizeBasedWeight = this.conf.getSizeBasedWeight();
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preemptionInterval = this.conf.getPreemptionInterval();
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waitTimeBeforeKill = this.conf.getWaitTimeBeforeKill();
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if (!initialized) {
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rootMetrics = QueueMetrics.forQueue("root", null, true, conf);
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this.rmContext = rmContext;
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@ -52,6 +52,11 @@ public class FairSchedulerConfiguration extends Configuration {
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/** Whether preemption is enabled. */
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protected static final String PREEMPTION = CONF_PREFIX + "preemption";
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protected static final boolean DEFAULT_PREEMPTION = false;
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protected static final String PREEMPTION_INTERVAL = CONF_PREFIX + "preemptionInterval";
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protected static final int DEFAULT_PREEMPTION_INTERVAL = 5000;
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protected static final String WAIT_TIME_BEFORE_KILL = CONF_PREFIX + "waitTimeBeforeKill";
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protected static final int DEFAULT_WAIT_TIME_BEFORE_KILL = 15000;
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/** Whether to assign multiple containers in one check-in. */
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protected static final String ASSIGN_MULTIPLE = CONF_PREFIX + "assignmultiple";
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@ -120,4 +125,12 @@ public String getEventlogDir() {
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return get(EVENT_LOG_DIR, new File(System.getProperty("hadoop.log.dir",
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"/tmp/")).getAbsolutePath() + File.separator + "fairscheduler");
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}
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public int getPreemptionInterval() {
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return getInt(PREEMPTION_INTERVAL, DEFAULT_PREEMPTION_INTERVAL);
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}
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public int getWaitTimeBeforeKill() {
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return getInt(WAIT_TIME_BEFORE_KILL, DEFAULT_WAIT_TIME_BEFORE_KILL);
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}
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}
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@ -30,6 +30,7 @@
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.List;
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import java.util.Map;
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@ -891,9 +892,16 @@ else if (p.getName().equals("root.queueB")) {
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*/
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public void testChoiceOfPreemptedContainers() throws Exception {
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Configuration conf = createConfiguration();
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conf.setLong(FairSchedulerConfiguration.PREEMPTION_INTERVAL, 5000);
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conf.setLong(FairSchedulerConfiguration.WAIT_TIME_BEFORE_KILL, 10000);
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conf.set(FairSchedulerConfiguration.ALLOCATION_FILE + ".allocation.file", ALLOC_FILE);
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scheduler.reinitialize(conf, resourceManager.getRMContext());
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MockClock clock = new MockClock();
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scheduler.setClock(clock);
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PrintWriter out = new PrintWriter(new FileWriter(ALLOC_FILE));
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out.println("<?xml version=\"1.0\"?>");
|
||||
out.println("<allocations>");
|
||||
@ -988,15 +996,38 @@ public void testChoiceOfPreemptedContainers() throws Exception {
|
||||
Resources.createResource(2 * 1024));
|
||||
assertEquals(1, scheduler.applications.get(app1).getLiveContainers().size());
|
||||
assertEquals(1, scheduler.applications.get(app2).getLiveContainers().size());
|
||||
assertEquals(0, scheduler.applications.get(app3).getLiveContainers().size());
|
||||
assertEquals(1, scheduler.applications.get(app4).getLiveContainers().size());
|
||||
assertEquals(1, scheduler.applications.get(app5).getLiveContainers().size());
|
||||
|
||||
// First verify we are adding containers to preemption list for the application
|
||||
assertTrue(!Collections.disjoint(scheduler.applications.get(app3).getLiveContainers(),
|
||||
scheduler.applications.get(app3).getPreemptionContainers()));
|
||||
assertTrue(!Collections.disjoint(scheduler.applications.get(app6).getLiveContainers(),
|
||||
scheduler.applications.get(app6).getPreemptionContainers()));
|
||||
|
||||
// Pretend 15 seconds have passed
|
||||
clock.tick(15);
|
||||
|
||||
// Trigger a kill by insisting we want containers back
|
||||
scheduler.preemptResources(scheduler.getQueueManager().getLeafQueues(),
|
||||
Resources.createResource(2 * 1024));
|
||||
|
||||
// At this point the containers should have been killed (since we are not simulating AM)
|
||||
assertEquals(0, scheduler.applications.get(app6).getLiveContainers().size());
|
||||
assertEquals(0, scheduler.applications.get(app3).getLiveContainers().size());
|
||||
|
||||
// Trigger a kill by insisting we want containers back
|
||||
scheduler.preemptResources(scheduler.getQueueManager().getLeafQueues(),
|
||||
Resources.createResource(2 * 1024));
|
||||
|
||||
// Pretend 15 seconds have passed
|
||||
clock.tick(15);
|
||||
|
||||
// We should be able to claw back another container from A and B each.
|
||||
// Make sure it is lowest priority container.
|
||||
scheduler.preemptResources(scheduler.getQueueManager().getLeafQueues(),
|
||||
Resources.createResource(2 * 1024));
|
||||
|
||||
assertEquals(1, scheduler.applications.get(app1).getLiveContainers().size());
|
||||
assertEquals(0, scheduler.applications.get(app2).getLiveContainers().size());
|
||||
assertEquals(0, scheduler.applications.get(app3).getLiveContainers().size());
|
||||
|
||||
Loading…
Reference in New Issue
Block a user