/**
* 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.mapreduce.v2.app.local;
import java.io.IOException;
import java.util.ArrayList;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.JobCounter;
import org.apache.hadoop.mapreduce.MRJobConfig;
import org.apache.hadoop.mapreduce.v2.api.records.TaskType;
import org.apache.hadoop.mapreduce.v2.app.AppContext;
import org.apache.hadoop.mapreduce.v2.app.client.ClientService;
import org.apache.hadoop.mapreduce.v2.app.job.event.JobCounterUpdateEvent;
import org.apache.hadoop.mapreduce.v2.app.job.event.JobEvent;
import org.apache.hadoop.mapreduce.v2.app.job.event.JobEventType;
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptContainerAssignedEvent;
import org.apache.hadoop.mapreduce.v2.app.rm.ContainerAllocator;
import org.apache.hadoop.mapreduce.v2.app.rm.ContainerAllocatorEvent;
import org.apache.hadoop.mapreduce.v2.app.rm.RMCommunicator;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.yarn.api.protocolrecords.AllocateRequest;
import org.apache.hadoop.yarn.api.protocolrecords.AllocateResponse;
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.ResourceRequest;
import org.apache.hadoop.yarn.api.records.Token;
import org.apache.hadoop.yarn.client.ClientRMProxy;
import org.apache.hadoop.yarn.event.EventHandler;
import org.apache.hadoop.yarn.exceptions.ApplicationAttemptNotFoundException;
import org.apache.hadoop.yarn.exceptions.ApplicationMasterNotRegisteredException;
import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
import org.apache.hadoop.yarn.factories.RecordFactory;
import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
import org.apache.hadoop.yarn.security.AMRMTokenIdentifier;
/**
* Allocates containers locally. Doesn't allocate a real container;
* instead sends an allocated event for all requests.
*/
public class LocalContainerAllocator extends RMCommunicator
implements ContainerAllocator {
private static final Log LOG =
LogFactory.getLog(LocalContainerAllocator.class);
@SuppressWarnings("rawtypes")
private final EventHandler eventHandler;
private long retryInterval;
private long retrystartTime;
private String nmHost;
private int nmPort;
private int nmHttpPort;
private ContainerId containerId;
protected int lastResponseID;
private final RecordFactory recordFactory =
RecordFactoryProvider.getRecordFactory(null);
public LocalContainerAllocator(ClientService clientService,
AppContext context, String nmHost, int nmPort, int nmHttpPort
, ContainerId cId) {
super(clientService, context);
this.eventHandler = context.getEventHandler();
this.nmHost = nmHost;
this.nmPort = nmPort;
this.nmHttpPort = nmHttpPort;
this.containerId = cId;
}
@Override
protected void serviceInit(Configuration conf) throws Exception {
super.serviceInit(conf);
retryInterval =
getConfig().getLong(MRJobConfig.MR_AM_TO_RM_WAIT_INTERVAL_MS,
MRJobConfig.DEFAULT_MR_AM_TO_RM_WAIT_INTERVAL_MS);
// Init startTime to current time. If all goes well, it will be reset after
// first attempt to contact RM.
retrystartTime = System.currentTimeMillis();
}
@SuppressWarnings("unchecked")
@Override
protected synchronized void heartbeat() throws Exception {
AllocateRequest allocateRequest =
AllocateRequest.newInstance(this.lastResponseID,
super.getApplicationProgress(), new ArrayList<ResourceRequest>(),
new ArrayList<ContainerId>(), null);
AllocateResponse allocateResponse = null;
try {
allocateResponse = scheduler.allocate(allocateRequest);
// Reset retry count if no exception occurred.
retrystartTime = System.currentTimeMillis();
} catch (ApplicationAttemptNotFoundException e) {
LOG.info("Event from RM: shutting down Application Master");
// This can happen if the RM has been restarted. If it is in that state,
// this application must clean itself up.
eventHandler.handle(new JobEvent(this.getJob().getID(),
JobEventType.JOB_AM_REBOOT));
throw new YarnRuntimeException(
"Resource Manager doesn't recognize AttemptId: "
+ this.getContext().getApplicationID(), e);
} catch (ApplicationMasterNotRegisteredException e) {
LOG.info("ApplicationMaster is out of sync with ResourceManager,"
+ " hence resync and send outstanding requests.");
this.lastResponseID = 0;
register();
} catch (Exception e) {
// This can happen when the connection to the RM has gone down. Keep
// re-trying until the retryInterval has expired.
if (System.currentTimeMillis() - retrystartTime >= retryInterval) {
LOG.error("Could not contact RM after " + retryInterval + " milliseconds.");
eventHandler.handle(new JobEvent(this.getJob().getID(),
JobEventType.INTERNAL_ERROR));
throw new YarnRuntimeException("Could not contact RM after " +
retryInterval + " milliseconds.");
}
// Throw this up to the caller, which may decide to ignore it and
// continue to attempt to contact the RM.
throw e;
}
if (allocateResponse != null) {
this.lastResponseID = allocateResponse.getResponseId();
Token token = allocateResponse.getAMRMToken();
if (token != null) {
updateAMRMToken(token);
}
}
}
private void updateAMRMToken(Token token) throws IOException {
org.apache.hadoop.security.token.Token<AMRMTokenIdentifier> amrmToken =
new org.apache.hadoop.security.token.Token<AMRMTokenIdentifier>(token
.getIdentifier().array(), token.getPassword().array(), new Text(
token.getKind()), new Text(token.getService()));
UserGroupInformation currentUGI = UserGroupInformation.getCurrentUser();
currentUGI.addToken(amrmToken);
amrmToken.setService(ClientRMProxy.getAMRMTokenService(getConfig()));
}
@SuppressWarnings("unchecked")
@Override
public void handle(ContainerAllocatorEvent event) {
if (event.getType() == ContainerAllocator.EventType.CONTAINER_REQ) {
LOG.info("Processing the event " + event.toString());
// Assign the same container ID as the AM
ContainerId cID =
ContainerId.newContainerId(getContext().getApplicationAttemptId(),
this.containerId.getContainerId());
Container container = recordFactory.newRecordInstance(Container.class);
container.setId(cID);
NodeId nodeId = NodeId.newInstance(this.nmHost, this.nmPort);
container.setNodeId(nodeId);
container.setContainerToken(null);
container.setNodeHttpAddress(this.nmHost + ":" + this.nmHttpPort);
// send the container-assigned event to task attempt
if (event.getAttemptID().getTaskId().getTaskType() == TaskType.MAP) {
JobCounterUpdateEvent jce =
new JobCounterUpdateEvent(event.getAttemptID().getTaskId()
.getJobId());
// TODO Setting OTHER_LOCAL_MAP for now.
jce.addCounterUpdate(JobCounter.OTHER_LOCAL_MAPS, 1);
eventHandler.handle(jce);
}
eventHandler.handle(new TaskAttemptContainerAssignedEvent(
event.getAttemptID(), container, applicationACLs));
}
}
}