/**
* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceStability.Stable;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.ApplicationResourceUsageReport;
import org.apache.hadoop.yarn.api.records.Container;
import org.apache.hadoop.yarn.api.records.ContainerId;
import org.apache.hadoop.yarn.api.records.NodeId;
import org.apache.hadoop.yarn.api.records.Priority;
import org.apache.hadoop.yarn.api.records.Resource;
import org.apache.hadoop.yarn.api.records.ResourceRequest;
import org.apache.hadoop.yarn.server.resourcemanager.RMContext;
import org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptState;
import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainer;
import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainerEvent;
import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainerEventType;
import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainerImpl;
import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainerReservedEvent;
import org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNodeCleanContainerEvent;
import org.apache.hadoop.yarn.util.resource.Resources;
import com.google.common.collect.HashMultiset;
import com.google.common.collect.Multiset;
/**
* Represents an application attempt from the viewpoint of the scheduler.
* Each running app attempt in the RM corresponds to one instance
* of this class.
*/
@Private
@Unstable
public abstract class SchedulerApplication {
private static final Log LOG = LogFactory.getLog(SchedulerApplication.class);
protected final AppSchedulingInfo appSchedulingInfo;
protected final Map<ContainerId, RMContainer> liveContainers =
new HashMap<ContainerId, RMContainer>();
protected final Map<Priority, Map<NodeId, RMContainer>> reservedContainers =
new HashMap<Priority, Map<NodeId, RMContainer>>();
private final Multiset<Priority> reReservations = HashMultiset.create();
protected final Resource currentReservation = Resource.newInstance(0, 0);
private Resource resourceLimit = Resource.newInstance(0, 0);
protected final Resource currentConsumption = Resource.newInstance(0, 0);
protected List<RMContainer> newlyAllocatedContainers =
new ArrayList<RMContainer>();
/**
* Count how many times the application has been given an opportunity
* to schedule a task at each priority. Each time the scheduler
* asks the application for a task at this priority, it is incremented,
* and each time the application successfully schedules a task, it
* is reset to 0.
*/
Multiset<Priority> schedulingOpportunities = HashMultiset.create();
// Time of the last container scheduled at the current allowed level
protected Map<Priority, Long> lastScheduledContainer =
new HashMap<Priority, Long>();
protected final Queue queue;
protected boolean isStopped = false;
protected final RMContext rmContext;
public SchedulerApplication(ApplicationAttemptId applicationAttemptId,
String user, Queue queue, ActiveUsersManager activeUsersManager,
RMContext rmContext) {
this.rmContext = rmContext;
this.appSchedulingInfo =
new AppSchedulingInfo(applicationAttemptId, user, queue,
activeUsersManager);
this.queue = queue;
}
/**
* Get the live containers of the application.
* @return live containers of the application
*/
public synchronized Collection<RMContainer> getLiveContainers() {
return new ArrayList<RMContainer>(liveContainers.values());
}
/**
* Is this application pending?
* @return true if it is else false.
*/
public boolean isPending() {
return appSchedulingInfo.isPending();
}
/**
* Get {@link ApplicationAttemptId} of the application master.
* @return <code>ApplicationAttemptId</code> of the application master
*/
public ApplicationAttemptId getApplicationAttemptId() {
return appSchedulingInfo.getApplicationAttemptId();
}
public ApplicationId getApplicationId() {
return appSchedulingInfo.getApplicationId();
}
public String getUser() {
return appSchedulingInfo.getUser();
}
public Map<String, ResourceRequest> getResourceRequests(Priority priority) {
return appSchedulingInfo.getResourceRequests(priority);
}
public int getNewContainerId() {
return appSchedulingInfo.getNewContainerId();
}
public Collection<Priority> getPriorities() {
return appSchedulingInfo.getPriorities();
}
public ResourceRequest getResourceRequest(Priority priority, String resourceName) {
return this.appSchedulingInfo.getResourceRequest(priority, resourceName);
}
public synchronized int getTotalRequiredResources(Priority priority) {
return getResourceRequest(priority, ResourceRequest.ANY).getNumContainers();
}
public Resource getResource(Priority priority) {
return appSchedulingInfo.getResource(priority);
}
public String getQueueName() {
return appSchedulingInfo.getQueueName();
}
public synchronized RMContainer getRMContainer(ContainerId id) {
return liveContainers.get(id);
}
protected synchronized void resetReReservations(Priority priority) {
reReservations.setCount(priority, 0);
}
protected synchronized void addReReservation(Priority priority) {
reReservations.add(priority);
}
public synchronized int getReReservations(Priority priority) {
return reReservations.count(priority);
}
/**
* Get total current reservations.
* Used only by unit tests
* @return total current reservations
*/
@Stable
@Private
public synchronized Resource getCurrentReservation() {
return currentReservation;
}
public Queue getQueue() {
return queue;
}
public synchronized void updateResourceRequests(
List<ResourceRequest> requests) {
if (!isStopped) {
appSchedulingInfo.updateResourceRequests(requests);
}
}
public synchronized void stop(RMAppAttemptState rmAppAttemptFinalState) {
// Cleanup all scheduling information
isStopped = true;
appSchedulingInfo.stop(rmAppAttemptFinalState);
}
public synchronized boolean isStopped() {
return isStopped;
}
/**
* Get the list of reserved containers
* @return All of the reserved containers.
*/
public synchronized List<RMContainer> getReservedContainers() {
List<RMContainer> reservedContainers = new ArrayList<RMContainer>();
for (Map.Entry<Priority, Map<NodeId, RMContainer>> e :
this.reservedContainers.entrySet()) {
reservedContainers.addAll(e.getValue().values());
}
return reservedContainers;
}
public synchronized RMContainer reserve(SchedulerNode node, Priority priority,
RMContainer rmContainer, Container container) {
// Create RMContainer if necessary
if (rmContainer == null) {
rmContainer =
new RMContainerImpl(container, getApplicationAttemptId(),
node.getNodeID(), rmContext.getDispatcher().getEventHandler(),
rmContext.getContainerAllocationExpirer());
Resources.addTo(currentReservation, container.getResource());
// Reset the re-reservation count
resetReReservations(priority);
} else {
// Note down the re-reservation
addReReservation(priority);
}
rmContainer.handle(new RMContainerReservedEvent(container.getId(),
container.getResource(), node.getNodeID(), priority));
Map<NodeId, RMContainer> reservedContainers =
this.reservedContainers.get(priority);
if (reservedContainers == null) {
reservedContainers = new HashMap<NodeId, RMContainer>();
this.reservedContainers.put(priority, reservedContainers);
}
reservedContainers.put(node.getNodeID(), rmContainer);
LOG.info("Application " + getApplicationId()
+ " reserved container " + rmContainer
+ " on node " + node + ", currently has " + reservedContainers.size()
+ " at priority " + priority
+ "; currentReservation " + currentReservation.getMemory());
return rmContainer;
}
/**
* Has the application reserved the given <code>node</code> at the
* given <code>priority</code>?
* @param node node to be checked
* @param priority priority of reserved container
* @return true is reserved, false if not
*/
public synchronized boolean isReserved(SchedulerNode node, Priority priority) {
Map<NodeId, RMContainer> reservedContainers =
this.reservedContainers.get(priority);
if (reservedContainers != null) {
return reservedContainers.containsKey(node.getNodeID());
}
return false;
}
public synchronized void setHeadroom(Resource globalLimit) {
this.resourceLimit = globalLimit;
}
/**
* Get available headroom in terms of resources for the application's user.
* @return available resource headroom
*/
public synchronized Resource getHeadroom() {
// Corner case to deal with applications being slightly over-limit
if (resourceLimit.getMemory() < 0) {
resourceLimit.setMemory(0);
}
return resourceLimit;
}
public synchronized int getNumReservedContainers(Priority priority) {
Map<NodeId, RMContainer> reservedContainers =
this.reservedContainers.get(priority);
return (reservedContainers == null) ? 0 : reservedContainers.size();
}
@SuppressWarnings("unchecked")
public synchronized void containerLaunchedOnNode(ContainerId containerId,
NodeId nodeId) {
// Inform the container
RMContainer rmContainer = getRMContainer(containerId);
if (rmContainer == null) {
// Some unknown container sneaked into the system. Kill it.
rmContext.getDispatcher().getEventHandler()
.handle(new RMNodeCleanContainerEvent(nodeId, containerId));
return;
}
rmContainer.handle(new RMContainerEvent(containerId,
RMContainerEventType.LAUNCHED));
}
public synchronized void showRequests() {
if (LOG.isDebugEnabled()) {
for (Priority priority : getPriorities()) {
Map<String, ResourceRequest> requests = getResourceRequests(priority);
if (requests != null) {
LOG.debug("showRequests:" + " application=" + getApplicationId() +
" headRoom=" + getHeadroom() +
" currentConsumption=" + currentConsumption.getMemory());
for (ResourceRequest request : requests.values()) {
LOG.debug("showRequests:" + " application=" + getApplicationId()
+ " request=" + request);
}
}
}
}
}
public Resource getCurrentConsumption() {
return currentConsumption;
}
public synchronized List<Container> pullNewlyAllocatedContainers() {
List<Container> returnContainerList = new ArrayList<Container>(
newlyAllocatedContainers.size());
for (RMContainer rmContainer : newlyAllocatedContainers) {
rmContainer.handle(new RMContainerEvent(rmContainer.getContainerId(),
RMContainerEventType.ACQUIRED));
returnContainerList.add(rmContainer.getContainer());
}
newlyAllocatedContainers.clear();
return returnContainerList;
}
public synchronized void updateBlacklist(
List<String> blacklistAdditions, List<String> blacklistRemovals) {
if (!isStopped) {
this.appSchedulingInfo.updateBlacklist(
blacklistAdditions, blacklistRemovals);
}
}
public boolean isBlacklisted(String resourceName) {
return this.appSchedulingInfo.isBlacklisted(resourceName);
}
public synchronized void addSchedulingOpportunity(Priority priority) {
schedulingOpportunities.setCount(priority,
schedulingOpportunities.count(priority) + 1);
}
public synchronized void subtractSchedulingOpportunity(Priority priority) {
int count = schedulingOpportunities.count(priority) - 1;
this.schedulingOpportunities.setCount(priority, Math.max(count, 0));
}
/**
* Return the number of times the application has been given an opportunity
* to schedule a task at the given priority since the last time it
* successfully did so.
*/
public synchronized int getSchedulingOpportunities(Priority priority) {
return schedulingOpportunities.count(priority);
}
/**
* Should be called when an application has successfully scheduled a container,
* or when the scheduling locality threshold is relaxed.
* Reset various internal counters which affect delay scheduling
*
* @param priority The priority of the container scheduled.
*/
public synchronized void resetSchedulingOpportunities(Priority priority) {
resetSchedulingOpportunities(priority, System.currentTimeMillis());
}
// used for continuous scheduling
public synchronized void resetSchedulingOpportunities(Priority priority,
long currentTimeMs) {
lastScheduledContainer.put(priority, currentTimeMs);
schedulingOpportunities.setCount(priority, 0);
}
public synchronized ApplicationResourceUsageReport getResourceUsageReport() {
return ApplicationResourceUsageReport.newInstance(liveContainers.size(),
reservedContainers.size(), Resources.clone(currentConsumption),
Resources.clone(currentReservation),
Resources.add(currentConsumption, currentReservation));
}
}