hadoop FederationInterceptor 源码
haddop FederationInterceptor 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/amrmproxy/FederationInterceptor.java
/**
* 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.nodemanager.amrmproxy;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutorCompletionService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.stream.Collectors;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.yarn.api.ApplicationClientProtocol;
import org.apache.hadoop.yarn.api.ApplicationMasterProtocol;
import org.apache.hadoop.yarn.api.protocolrecords.AllocateRequest;
import org.apache.hadoop.yarn.api.protocolrecords.AllocateResponse;
import org.apache.hadoop.yarn.api.protocolrecords.FinishApplicationMasterRequest;
import org.apache.hadoop.yarn.api.protocolrecords.FinishApplicationMasterResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetContainersRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetContainersResponse;
import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterRequest;
import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterResponse;
import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.RegisterApplicationMasterRequestPBImpl;
import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.RegisterApplicationMasterResponsePBImpl;
import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.Container;
import org.apache.hadoop.yarn.api.records.ContainerId;
import org.apache.hadoop.yarn.api.records.ContainerReport;
import org.apache.hadoop.yarn.api.records.ContainerStatus;
import org.apache.hadoop.yarn.api.records.NMToken;
import org.apache.hadoop.yarn.api.records.PreemptionContract;
import org.apache.hadoop.yarn.api.records.PreemptionMessage;
import org.apache.hadoop.yarn.api.records.Resource;
import org.apache.hadoop.yarn.api.records.ResourceBlacklistRequest;
import org.apache.hadoop.yarn.api.records.ResourceRequest;
import org.apache.hadoop.yarn.api.records.StrictPreemptionContract;
import org.apache.hadoop.yarn.api.records.UpdateContainerRequest;
import org.apache.hadoop.yarn.api.records.FinalApplicationStatus;
import org.apache.hadoop.yarn.client.AMRMClientUtils;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.exceptions.ApplicationMasterNotRegisteredException;
import org.apache.hadoop.yarn.exceptions.InvalidApplicationMasterRequestException;
import org.apache.hadoop.yarn.exceptions.YarnException;
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.proto.YarnServiceProtos.RegisterApplicationMasterRequestProto;
import org.apache.hadoop.yarn.proto.YarnServiceProtos.RegisterApplicationMasterResponseProto;
import org.apache.hadoop.yarn.security.AMRMTokenIdentifier;
import org.apache.hadoop.yarn.server.AMHeartbeatRequestHandler;
import org.apache.hadoop.yarn.server.AMRMClientRelayer;
import org.apache.hadoop.yarn.server.federation.failover.FederationProxyProviderUtil;
import org.apache.hadoop.yarn.server.federation.policies.FederationPolicyUtils;
import org.apache.hadoop.yarn.server.federation.policies.amrmproxy.FederationAMRMProxyPolicy;
import org.apache.hadoop.yarn.server.federation.policies.exceptions.FederationPolicyInitializationException;
import org.apache.hadoop.yarn.server.federation.resolver.SubClusterResolver;
import org.apache.hadoop.yarn.server.federation.store.records.SubClusterId;
import org.apache.hadoop.yarn.server.federation.store.records.SubClusterInfo;
import org.apache.hadoop.yarn.server.federation.utils.FederationRegistryClient;
import org.apache.hadoop.yarn.server.federation.utils.FederationStateStoreFacade;
import org.apache.hadoop.yarn.server.uam.UnmanagedAMPoolManager;
import org.apache.hadoop.yarn.util.AsyncCallback;
import org.apache.hadoop.yarn.util.ConverterUtils;
import org.apache.hadoop.yarn.util.MonotonicClock;
import org.apache.hadoop.yarn.util.resource.Resources;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.classification.VisibleForTesting;
import org.apache.hadoop.util.Preconditions;
/**
* Extends the AbstractRequestInterceptor and provides an implementation for
* federation of YARN RM and scaling an application across multiple YARN
* sub-clusters. All the federation specific implementation is encapsulated in
* this class. This is always the last interceptor in the chain.
*/
public class FederationInterceptor extends AbstractRequestInterceptor {
private static final Logger LOG =
LoggerFactory.getLogger(FederationInterceptor.class);
public static final String NMSS_CLASS_PREFIX = "FederationInterceptor/";
public static final String NMSS_REG_REQUEST_KEY =
NMSS_CLASS_PREFIX + "registerRequest";
public static final String NMSS_REG_RESPONSE_KEY =
NMSS_CLASS_PREFIX + "registerResponse";
/**
* When AMRMProxy HA is enabled, secondary AMRMTokens will be stored in Yarn
* Registry. Otherwise if NM recovery is enabled, the UAM token are stored in
* local NMSS instead under this directory name.
*/
public static final String NMSS_SECONDARY_SC_PREFIX =
NMSS_CLASS_PREFIX + "secondarySC/";
public static final String STRING_TO_BYTE_FORMAT = "UTF-8";
private static final RecordFactory RECORD_FACTORY =
RecordFactoryProvider.getRecordFactory(null);
/**
* From AM's perspective, FederationInterceptor behaves exactly the same as
* YarnRM (ApplicationMasterService). This is to remember the last heart beat
* response, used to handle duplicate heart beat and responseId from AM.
*/
private AllocateResponse lastAllocateResponse;
private final Object lastAllocateResponseLock = new Object();
private ApplicationAttemptId attemptId;
/**
* The home sub-cluster is the sub-cluster where the AM container is running
* in.
*/
private AMRMClientRelayer homeRMRelayer;
private SubClusterId homeSubClusterId;
private AMHeartbeatRequestHandler homeHeartbeartHandler;
/**
* UAM pool for secondary sub-clusters (ones other than home sub-cluster),
* using subClusterId as uamId. One UAM is created per sub-cluster RM except
* the home RM.
*
* Creation and register of UAM in secondary sub-clusters happen on-demand,
* when AMRMProxy policy routes resource request to these sub-clusters for the
* first time. AM heart beats to them are also handled asynchronously for
* performance reasons.
*/
private UnmanagedAMPoolManager uamPool;
/**
* The rmProxy relayers for secondary sub-clusters that keep track of all
* pending requests.
*/
private Map<String, AMRMClientRelayer> secondaryRelayers;
/**
* Stores the AllocateResponses that are received asynchronously from all the
* sub-cluster resource managers, including home RM, but not merged and
* returned back to AM yet.
*/
private Map<SubClusterId, List<AllocateResponse>> asyncResponseSink;
/**
* Remembers the last allocate response from all known sub-clusters. This is
* used together with sub-cluster timeout to assemble entries about
* cluster-wide info (e.g. AvailableResource, NumClusterNodes) in the allocate
* response back to AM.
*/
private Map<SubClusterId, AllocateResponse> lastSCResponse;
/**
* The async UAM registration result that is not consumed yet.
*/
private Map<SubClusterId, RegisterApplicationMasterResponse> uamRegistrations;
// For unit test synchronization
private Map<SubClusterId, Future<?>> uamRegisterFutures;
/** Thread pool used for asynchronous operations. */
private ExecutorService threadpool;
/**
* A flag for work preserving NM restart. If we just recovered, we need to
* generate an {@link ApplicationMasterNotRegisteredException} exception back
* to AM (similar to what RM will do after its restart/fail-over) in its next
* allocate to trigger AM re-register (which we will shield from RM and just
* return our saved register response) and a full pending requests re-send, so
* that all the {@link AMRMClientRelayer} will be re-populated with all
* pending requests.
*
*/
private volatile boolean justRecovered;
/** if true, allocate will be no-op, skipping actual processing. */
private volatile boolean finishAMCalled;
/**
* Used to keep track of the container Id and the sub cluster RM that created
* the container, so that we know which sub-cluster to forward later requests
* about existing containers to.
*/
private Map<ContainerId, SubClusterId> containerIdToSubClusterIdMap;
/**
* The original registration request that was sent by the AM. This instance is
* reused to register/re-register with all the sub-cluster RMs.
*/
private RegisterApplicationMasterRequest amRegistrationRequest;
/**
* The original registration response returned to AM. This instance is reused
* for duplicate register request from AM, triggered by timeout between AM and
* AMRMProxy.
*/
private RegisterApplicationMasterResponse amRegistrationResponse;
private FederationStateStoreFacade federationFacade;
private SubClusterResolver subClusterResolver;
/**
* Records the last time a successful heartbeat response received from a known
* sub-cluster. lastHeartbeatTimeStamp.keySet() should be in sync with
* uamPool.getAllUAMIds().
*/
private Map<SubClusterId, Long> lastSCResponseTime;
private long subClusterTimeOut;
private long lastAMHeartbeatTime;
/** The policy used to split requests among sub-clusters. */
private FederationAMRMProxyPolicy policyInterpreter;
private FederationRegistryClient registryClient;
// the maximum wait time for the first async heart beat response
private long heartbeatMaxWaitTimeMs;
private MonotonicClock clock = new MonotonicClock();
/**
* Creates an instance of the FederationInterceptor class.
*/
public FederationInterceptor() {
this.containerIdToSubClusterIdMap = new ConcurrentHashMap<>();
this.asyncResponseSink = new ConcurrentHashMap<>();
this.lastSCResponse = new ConcurrentHashMap<>();
this.uamRegistrations = new ConcurrentHashMap<>();
this.uamRegisterFutures = new ConcurrentHashMap<>();
this.threadpool = Executors.newCachedThreadPool();
this.uamPool = createUnmanagedAMPoolManager(this.threadpool);
this.secondaryRelayers = new ConcurrentHashMap<>();
this.amRegistrationRequest = null;
this.amRegistrationResponse = null;
this.justRecovered = false;
this.finishAMCalled = false;
this.lastSCResponseTime = new ConcurrentHashMap<>();
this.lastAMHeartbeatTime = this.clock.getTime();
}
/**
* Initializes the instance using specified context.
*/
@Override
public void init(AMRMProxyApplicationContext appContext) {
super.init(appContext);
LOG.info("Initializing Federation Interceptor");
// Update the conf if available
Configuration conf = appContext.getConf();
if (conf == null) {
conf = getConf();
} else {
setConf(conf);
}
// The proxy ugi used to talk to home RM as well as Yarn Registry, loaded
// with the up-to-date AMRMToken issued by home RM.
UserGroupInformation appOwner;
try {
appOwner = UserGroupInformation.createProxyUser(appContext.getUser(),
UserGroupInformation.getCurrentUser());
} catch (Exception ex) {
throw new YarnRuntimeException(ex);
}
if (appContext.getRegistryClient() != null) {
this.registryClient = new FederationRegistryClient(conf,
appContext.getRegistryClient(), appOwner);
// Add all app tokens for Yarn Registry access
if (appContext.getCredentials() != null) {
appOwner.addCredentials(appContext.getCredentials());
}
}
this.attemptId = appContext.getApplicationAttemptId();
ApplicationId appId = this.attemptId.getApplicationId();
this.homeSubClusterId =
SubClusterId.newInstance(YarnConfiguration.getClusterId(conf));
this.homeRMRelayer = new AMRMClientRelayer(createHomeRMProxy(appContext,
ApplicationMasterProtocol.class, appOwner), appId,
this.homeSubClusterId.toString());
this.homeHeartbeartHandler =
createHomeHeartbeartHandler(conf, appId, this.homeRMRelayer);
this.homeHeartbeartHandler.setUGI(appOwner);
this.homeHeartbeartHandler.setDaemon(true);
this.homeHeartbeartHandler.start();
// set lastResponseId to -1 before application master registers
this.lastAllocateResponse =
RECORD_FACTORY.newRecordInstance(AllocateResponse.class);
this.lastAllocateResponse
.setResponseId(AMRMClientUtils.PRE_REGISTER_RESPONSE_ID);
this.federationFacade = FederationStateStoreFacade.getInstance();
this.subClusterResolver = this.federationFacade.getSubClusterResolver();
// AMRMProxyPolicy will be initialized in registerApplicationMaster
this.policyInterpreter = null;
this.uamPool.init(conf);
this.uamPool.start();
this.heartbeatMaxWaitTimeMs =
conf.getLong(YarnConfiguration.FEDERATION_AMRMPROXY_HB_MAX_WAIT_MS,
YarnConfiguration.DEFAULT_FEDERATION_AMRMPROXY_HB_MAX_WAIT_MS);
this.subClusterTimeOut =
conf.getLong(YarnConfiguration.FEDERATION_AMRMPROXY_SUBCLUSTER_TIMEOUT,
YarnConfiguration.DEFAULT_FEDERATION_AMRMPROXY_SUBCLUSTER_TIMEOUT);
if (this.subClusterTimeOut <= 0) {
LOG.info(
"{} configured to be {}, should be positive. Using default of {}.",
YarnConfiguration.FEDERATION_AMRMPROXY_SUBCLUSTER_TIMEOUT,
this.subClusterTimeOut,
YarnConfiguration.DEFAULT_FEDERATION_AMRMPROXY_SUBCLUSTER_TIMEOUT);
this.subClusterTimeOut =
YarnConfiguration.DEFAULT_FEDERATION_AMRMPROXY_SUBCLUSTER_TIMEOUT;
}
}
@Override
public void recover(Map<String, byte[]> recoveredDataMap) {
super.recover(recoveredDataMap);
LOG.info("Recovering data for FederationInterceptor for {}.", this.attemptId);
this.justRecovered = true;
if (recoveredDataMap == null || recoveredDataMap.isEmpty()) {
LOG.warn("recoveredDataMap isNull Or isEmpty, FederationInterceptor can't recover.");
return;
}
if (!recoveredDataMap.containsKey(NMSS_REG_REQUEST_KEY)) {
return;
}
try {
if (recoveredDataMap.containsKey(NMSS_REG_REQUEST_KEY)) {
byte[] appMasterRequestBytes = recoveredDataMap.get(NMSS_REG_REQUEST_KEY);
RegisterApplicationMasterRequestProto pb =
RegisterApplicationMasterRequestProto.parseFrom(appMasterRequestBytes);
this.amRegistrationRequest = new RegisterApplicationMasterRequestPBImpl(pb);
LOG.info("amRegistrationRequest recovered for {}.", this.attemptId);
// Give the register request to homeRMRelayer for future re-registration
this.homeRMRelayer.setAMRegistrationRequest(this.amRegistrationRequest);
}
if (recoveredDataMap.containsKey(NMSS_REG_RESPONSE_KEY)) {
byte[] appMasterResponseBytes = recoveredDataMap.get(NMSS_REG_RESPONSE_KEY);
RegisterApplicationMasterResponseProto pb =
RegisterApplicationMasterResponseProto.parseFrom(appMasterResponseBytes);
this.amRegistrationResponse = new RegisterApplicationMasterResponsePBImpl(pb);
LOG.info("amRegistrationResponse recovered for {}.", this.attemptId);
}
// Recover UAM amrmTokens from registry or NMSS
Map<String, Token<AMRMTokenIdentifier>> uamMap =
recoverSubClusterAMRMTokenIdentifierMap(recoveredDataMap);
// Re-attach the UAMs
int containers = 0;
AMRMProxyApplicationContext applicationContext = getApplicationContext();
ApplicationId applicationId = this.attemptId.getApplicationId();
String queue = this.amRegistrationResponse.getQueue();
String homeSCId = this.homeSubClusterId.getId();
String user = applicationContext.getUser();
for (Map.Entry<String, Token<AMRMTokenIdentifier>> entry : uamMap.entrySet()) {
String keyScId = entry.getKey();
Token<AMRMTokenIdentifier> tokens = entry.getValue();
SubClusterId subClusterId = SubClusterId.newInstance(keyScId);
// Create a config loaded with federation on and subClusterId
// for each UAM
YarnConfiguration config = new YarnConfiguration(getConf());
FederationProxyProviderUtil.updateConfForFederation(config, keyScId);
try {
// ReAttachUAM
this.uamPool.reAttachUAM(keyScId, config, applicationId, queue, user, homeSCId,
tokens, keyScId);
// GetAMRMClientRelayer
this.secondaryRelayers.put(keyScId, this.uamPool.getAMRMClientRelayer(keyScId));
// RegisterApplicationMaster
RegisterApplicationMasterResponse response =
this.uamPool.registerApplicationMaster(keyScId, this.amRegistrationRequest);
// Set sub-cluster to be timed out initially
lastSCResponseTime.put(subClusterId, clock.getTime() - subClusterTimeOut);
// Running containers from secondary RMs
List<Container> previousAttempts = response.getContainersFromPreviousAttempts();
for (Container container : previousAttempts) {
ContainerId containerId = container.getId();
containerIdToSubClusterIdMap.put(containerId, subClusterId);
containers++;
LOG.info("From subCluster {} running container {}", subClusterId, containerId);
}
LOG.info("Recovered {} running containers from UAM in {}.",
previousAttempts.size(), subClusterId);
} catch (Exception e) {
LOG.error("Error reattaching UAM to {} for {}.", subClusterId, this.attemptId, e);
// During recovery, we need to clean up the data of the bad SubCluster.
// This ensures that when the bad SubCluster is recovered,
// new Containers can still be allocated and new UAMs can be registered.
this.uamPool.unAttachUAM(keyScId);
this.secondaryRelayers.remove(keyScId);
this.lastSCResponseTime.remove(subClusterId);
List<ContainerId> containerIds =
containerIdToSubClusterIdMap.entrySet().stream()
.filter(item-> item.getValue().equals(subClusterId))
.map(Entry::getKey)
.collect(Collectors.toList());
for (ContainerId containerId : containerIds) {
containerIdToSubClusterIdMap.remove(containerId);
}
}
}
// Get the running containers from home RM, note that we will also get the
// AM container itself from here. We don't need it, but no harm to put the
// map as well.
UserGroupInformation appSubmitter;
if (UserGroupInformation.isSecurityEnabled()) {
appSubmitter = UserGroupInformation.createProxyUser(user,
UserGroupInformation.getLoginUser());
} else {
appSubmitter = UserGroupInformation.createRemoteUser(user);
}
ApplicationClientProtocol rmClient = createHomeRMProxy(applicationContext,
ApplicationClientProtocol.class, appSubmitter);
GetContainersRequest request = GetContainersRequest.newInstance(this.attemptId);
GetContainersResponse response = rmClient.getContainers(request);
for (ContainerReport container : response.getContainerList()) {
ContainerId containerId = container.getContainerId();
containerIdToSubClusterIdMap.put(containerId, this.homeSubClusterId);
containers++;
LOG.debug("From home RM {} running container {}.", this.homeSubClusterId, containerId);
}
LOG.info("{} running containers including AM recovered from home RM {}.",
response.getContainerList().size(), this.homeSubClusterId);
LOG.info("In all {} UAMs {} running containers including AM recovered for {}.",
uamMap.size(), containers, this.attemptId);
if (queue != null) {
// Initialize the AMRMProxyPolicy
queue = this.amRegistrationResponse.getQueue();
this.policyInterpreter = FederationPolicyUtils.loadAMRMPolicy(queue, this.policyInterpreter,
getConf(), this.federationFacade, this.homeSubClusterId);
}
} catch (IOException | YarnException e) {
throw new YarnRuntimeException(e);
}
}
/**
* recover SubClusterAMRMTokenIdentifierMap.
*
* If registryClient is not empty, restore directly from registryClient,
* otherwise restore from NMSS.
*
* @param recoveredDataMap recoveredDataMap.
* @return subClusterAMRMTokenIdentifierMap.
* @throws IOException IO Exception occurs.
*/
private Map<String, Token<AMRMTokenIdentifier>> recoverSubClusterAMRMTokenIdentifierMap(
Map<String, byte[]> recoveredDataMap) throws IOException {
Map<String, Token<AMRMTokenIdentifier>> uamMap;
ApplicationId applicationId = this.attemptId.getApplicationId();
if (this.registryClient != null) {
uamMap = this.registryClient.loadStateFromRegistry(applicationId);
LOG.info("Found {} existing UAMs for application {} in Yarn Registry.",
uamMap.size(), applicationId);
} else {
uamMap = recoverSubClusterAMRMTokenIdentifierMapFromNMSS(recoveredDataMap);
LOG.info("Found {} existing UAMs for application {} in NMStateStore.",
uamMap.size(), applicationId);
}
return uamMap;
}
/**
* recover SubClusterAMRMTokenIdentifierMap From NMSS.
*
* @param recoveredDataMap recoveredDataMap
* @return subClusterAMRMTokenIdentifierMap.
* @throws IOException IO Exception occurs.
*/
private Map<String, Token<AMRMTokenIdentifier>> recoverSubClusterAMRMTokenIdentifierMapFromNMSS(
Map<String, byte[]> recoveredDataMap) throws IOException {
Map<String, Token<AMRMTokenIdentifier>> uamMap = new HashMap<>();
for (Entry<String, byte[]> entry : recoveredDataMap.entrySet()) {
String key = entry.getKey();
byte[] value = entry.getValue();
if (key.startsWith(NMSS_SECONDARY_SC_PREFIX)) {
// entry for subClusterId -> UAM AMRMTokenIdentifier
String scId = key.substring(NMSS_SECONDARY_SC_PREFIX.length());
Token<AMRMTokenIdentifier> aMRMTokenIdentifier = new Token<>();
aMRMTokenIdentifier.decodeFromUrlString(new String(value, STRING_TO_BYTE_FORMAT));
uamMap.put(scId, aMRMTokenIdentifier);
LOG.debug("Recovered UAM in {} from NMSS.", scId);
}
}
return uamMap;
}
/**
* Sends the application master's registration request to the home RM.
*
* Between AM and AMRMProxy, FederationInterceptor modifies the RM behavior,
* so that when AM registers more than once, it returns the same register
* success response instead of throwing
* {@link InvalidApplicationMasterRequestException}. Furthermore, we present
* to AM as if we are the RM that never fails over (except when AMRMProxy
* restarts). When actual RM fails over, we always re-register automatically.
*
* We did this because FederationInterceptor can receive concurrent register
* requests from AM because of timeout between AM and AMRMProxy, which is
* shorter than the timeout + failOver between FederationInterceptor
* (AMRMProxy) and RM.
*
* For the same reason, this method needs to be synchronized.
*/
@Override
public synchronized RegisterApplicationMasterResponse
registerApplicationMaster(RegisterApplicationMasterRequest request)
throws YarnException, IOException {
// Reset the heartbeat responseId to zero upon register
synchronized (this.lastAllocateResponseLock) {
this.lastAllocateResponse.setResponseId(0);
}
this.justRecovered = false;
// If AM is calling with a different request, complain
if (this.amRegistrationRequest != null) {
if (!this.amRegistrationRequest.equals(request)) {
throw new YarnException("AM should not call "
+ "registerApplicationMaster with a different request body");
}
} else {
// Save the registration request. This will be used for registering with
// secondary sub-clusters using UAMs, as well as re-register later
this.amRegistrationRequest = request;
if (getNMStateStore() != null) {
try {
RegisterApplicationMasterRequestPBImpl pb =
(RegisterApplicationMasterRequestPBImpl)
this.amRegistrationRequest;
getNMStateStore().storeAMRMProxyAppContextEntry(this.attemptId,
NMSS_REG_REQUEST_KEY, pb.getProto().toByteArray());
} catch (Exception e) {
LOG.error("Error storing AMRMProxy application context entry for "
+ this.attemptId, e);
}
}
}
/*
* Present to AM as if we are the RM that never fails over. When actual RM
* fails over, we always re-register automatically.
*
* We did this because it is possible for AM to send duplicate register
* request because of timeout. When it happens, it is fine to simply return
* the success message. Out of all outstanding register threads, only the
* last one will still have an unbroken RPC connection and successfully
* return the response.
*/
if (this.amRegistrationResponse != null) {
return this.amRegistrationResponse;
}
/*
* Send a registration request to the home resource manager. Note that here
* we don't register with other sub-cluster resource managers because that
* will prevent us from using new sub-clusters that get added while the AM
* is running and will breaks the elasticity feature. The registration with
* the other sub-cluster RM will be done lazily as needed later.
*/
this.amRegistrationResponse =
this.homeRMRelayer.registerApplicationMaster(request);
if (this.amRegistrationResponse
.getContainersFromPreviousAttempts() != null) {
cacheAllocatedContainers(
this.amRegistrationResponse.getContainersFromPreviousAttempts(),
this.homeSubClusterId);
}
ApplicationId appId = this.attemptId.getApplicationId();
reAttachUAMAndMergeRegisterResponse(this.amRegistrationResponse, appId);
if (getNMStateStore() != null) {
try {
RegisterApplicationMasterResponsePBImpl pb =
(RegisterApplicationMasterResponsePBImpl)
this.amRegistrationResponse;
getNMStateStore().storeAMRMProxyAppContextEntry(this.attemptId,
NMSS_REG_RESPONSE_KEY, pb.getProto().toByteArray());
} catch (Exception e) {
LOG.error("Error storing AMRMProxy application context entry for "
+ this.attemptId, e);
}
}
// the queue this application belongs will be used for getting
// AMRMProxy policy from state store.
String queue = this.amRegistrationResponse.getQueue();
if (queue == null) {
LOG.warn("Received null queue for application " + appId
+ " from home subcluster. Will use default queue name "
+ YarnConfiguration.DEFAULT_QUEUE_NAME
+ " for getting AMRMProxyPolicy");
} else {
LOG.info("Application " + appId + " belongs to queue " + queue);
}
// Initialize the AMRMProxyPolicy
try {
this.policyInterpreter =
FederationPolicyUtils.loadAMRMPolicy(queue, this.policyInterpreter,
getConf(), this.federationFacade, this.homeSubClusterId);
} catch (FederationPolicyInitializationException e) {
throw new YarnRuntimeException(e);
}
return this.amRegistrationResponse;
}
/**
* Sends the heart beats to the home RM and the secondary sub-cluster RMs that
* are being used by the application.
*/
@Override
public AllocateResponse allocate(AllocateRequest request)
throws YarnException, IOException {
Preconditions.checkArgument(this.policyInterpreter != null,
"Allocate should be called after registerApplicationMaster");
this.lastAMHeartbeatTime = this.clock.getTime();
if (this.justRecovered) {
throw new ApplicationMasterNotRegisteredException(
"AMRMProxy just restarted and recovered for " + this.attemptId
+ ". AM should re-register and full re-send pending requests.");
}
if (this.finishAMCalled) {
LOG.warn("FinishApplicationMaster already called by {}, skip heartbeat "
+ "processing and return dummy response" + this.attemptId);
return RECORD_FACTORY.newRecordInstance(AllocateResponse.class);
}
// Check responseId and handle duplicate heartbeat exactly same as RM
synchronized (this.lastAllocateResponseLock) {
LOG.info("Heartbeat from " + this.attemptId + " with responseId "
+ request.getResponseId() + " when we are expecting "
+ this.lastAllocateResponse.getResponseId());
// Normally request.getResponseId() == lastResponse.getResponseId()
if (AMRMClientUtils.getNextResponseId(
request.getResponseId()) == this.lastAllocateResponse
.getResponseId()) {
// heartbeat one step old, simply return lastResponse
return this.lastAllocateResponse;
} else if (request.getResponseId() != this.lastAllocateResponse
.getResponseId()) {
throw new InvalidApplicationMasterRequestException(
AMRMClientUtils.assembleInvalidResponseIdExceptionMessage(attemptId,
this.lastAllocateResponse.getResponseId(),
request.getResponseId()));
}
}
try {
// Split the heart beat request into multiple requests, one for each
// sub-cluster RM that is used by this application.
Map<SubClusterId, AllocateRequest> requests =
splitAllocateRequest(request);
/**
* Send the requests to the all sub-cluster resource managers. All
* requests are synchronously triggered but sent asynchronously. Later the
* responses will be collected and merged.
*/
sendRequestsToResourceManagers(requests);
// Wait for the first async response to arrive
long startTime = this.clock.getTime();
synchronized (this.asyncResponseSink) {
try {
this.asyncResponseSink.wait(this.heartbeatMaxWaitTimeMs);
} catch (InterruptedException e) {
}
}
long firstResponseTime = this.clock.getTime() - startTime;
// An extra brief wait for other async heart beats, so that most of their
// responses can make it back to AM in the same heart beat round trip.
try {
Thread.sleep(firstResponseTime);
} catch (InterruptedException e) {
}
// Prepare the response to AM
AllocateResponse response = generateBaseAllocationResponse();
// Merge all responses from response sink
mergeAllocateResponses(response);
// Merge the containers and NMTokens from the new registrations into
// the response
if (!isNullOrEmpty(this.uamRegistrations)) {
Map<SubClusterId, RegisterApplicationMasterResponse> newRegistrations;
synchronized (this.uamRegistrations) {
newRegistrations = new HashMap<>(this.uamRegistrations);
this.uamRegistrations.clear();
}
mergeRegistrationResponses(response, newRegistrations);
}
// update the responseId and return the final response to AM
synchronized (this.lastAllocateResponseLock) {
response.setResponseId(AMRMClientUtils
.getNextResponseId(this.lastAllocateResponse.getResponseId()));
this.lastAllocateResponse = response;
}
return response;
} catch (Throwable ex) {
LOG.error("Exception encountered while processing heart beat for "
+ this.attemptId, ex);
throw new YarnException(ex);
}
}
/**
* Sends the finish application master request to all the resource managers
* used by the application.
*/
@Override
public FinishApplicationMasterResponse finishApplicationMaster(
FinishApplicationMasterRequest request)
throws YarnException, IOException {
this.finishAMCalled = true;
boolean failedToUnRegister = false;
// Application master is completing operation. Send the finish
// application master request to all the registered sub-cluster resource
// managers in parallel, wait for the responses and aggregate the results.
Map<String, FinishApplicationMasterResponse> responseMap =
this.uamPool.batchFinishApplicationMaster(request, attemptId.toString());
for (Map.Entry<String, FinishApplicationMasterResponse> entry : responseMap.entrySet()) {
String subClusterId = entry.getKey();
FinishApplicationMasterResponse response = entry.getValue();
if (response != null && response.getIsUnregistered()) {
secondaryRelayers.remove(subClusterId);
if (getNMStateStore() != null) {
getNMStateStore().removeAMRMProxyAppContextEntry(attemptId,
NMSS_SECONDARY_SC_PREFIX + subClusterId);
}
} else {
// response is null or response.getIsUnregistered() == false
failedToUnRegister = true;
}
}
// While the finish application request is being processed
// asynchronously by other sub-cluster resource managers, send the same
// request to the home resource manager on this thread.
FinishApplicationMasterResponse homeResponse =
this.homeRMRelayer.finishApplicationMaster(request);
// Stop the home heartbeat thread
this.homeHeartbeartHandler.shutdown();
if (failedToUnRegister) {
homeResponse.setIsUnregistered(false);
} else if (checkRequestFinalApplicationStatusSuccess(request)) {
// Clean up UAMs only when the app finishes successfully, so that no more
// attempt will be launched.
this.uamPool.stop();
removeAppFromRegistry();
}
return homeResponse;
}
private boolean checkRequestFinalApplicationStatusSuccess(
FinishApplicationMasterRequest request) {
if (request != null && request.getFinalApplicationStatus() != null) {
if (request.getFinalApplicationStatus().equals(FinalApplicationStatus.SUCCEEDED)) {
return true;
}
}
return false;
}
@Override
public void setNextInterceptor(RequestInterceptor next) {
throw new YarnRuntimeException(
"setNextInterceptor is being called on FederationInterceptor. "
+ "It should always be used as the last interceptor in the chain");
}
/**
* This is called when the application pipeline is being destroyed. We will
* release all the resources that we are holding in this call.
*/
@Override
public void shutdown() {
LOG.info("Shutting down FederationInterceptor for {}", this.attemptId);
// Do not stop uamPool service and kill UAMs here because of possible second
// app attempt
try {
this.uamPool.shutDownConnections();
} catch (YarnException e) {
LOG.error("Error shutting down all UAM clients without killing them", e);
}
if (this.threadpool != null) {
try {
this.threadpool.shutdown();
} catch (Throwable ex) {
}
this.threadpool = null;
}
// Stop the home heartbeat thread
this.homeHeartbeartHandler.shutdown();
this.homeRMRelayer.shutdown();
// Shutdown needs to clean up app
removeAppFromRegistry();
super.shutdown();
}
private void removeAppFromRegistry() {
if (this.registryClient != null && this.attemptId != null) {
ApplicationId applicationId = this.attemptId.getApplicationId();
if (applicationId != null) {
this.registryClient.removeAppFromRegistry(applicationId);
}
}
}
/**
* Only for unit test cleanup.
*/
@VisibleForTesting
protected void cleanupRegistry() {
if (this.registryClient != null) {
this.registryClient.cleanAllApplications();
}
}
@VisibleForTesting
protected FederationRegistryClient getRegistryClient() {
return this.registryClient;
}
@VisibleForTesting
protected ApplicationAttemptId getAttemptId() {
return this.attemptId;
}
@VisibleForTesting
protected AMHeartbeatRequestHandler getHomeHeartbeartHandler() {
return this.homeHeartbeartHandler;
}
/**
* Create the UAM pool manager for secondary sub-clsuters. For unit test to
* override.
*
* @param threadPool the thread pool to use
* @return the UAM pool manager instance
*/
@VisibleForTesting
protected UnmanagedAMPoolManager createUnmanagedAMPoolManager(
ExecutorService threadPool) {
return new UnmanagedAMPoolManager(threadPool);
}
@VisibleForTesting
protected AMHeartbeatRequestHandler createHomeHeartbeartHandler(
Configuration conf, ApplicationId appId,
AMRMClientRelayer rmProxyRelayer) {
return new AMHeartbeatRequestHandler(conf, appId, rmProxyRelayer);
}
/**
* Create a proxy instance that is used to connect to the Home resource
* manager.
*
* @param appContext AMRMProxyApplicationContext
* @param protocol the protocol class for the proxy
* @param user the ugi for the proxy
* @param <T> the type of the proxy
* @return the proxy created
*/
protected <T> T createHomeRMProxy(AMRMProxyApplicationContext appContext,
Class<T> protocol, UserGroupInformation user) {
try {
return FederationProxyProviderUtil.createRMProxy(appContext.getConf(),
protocol, this.homeSubClusterId, user, appContext.getAMRMToken());
} catch (Exception ex) {
throw new YarnRuntimeException(ex);
}
}
private void mergeRegisterResponse(
RegisterApplicationMasterResponse homeResponse,
RegisterApplicationMasterResponse otherResponse) {
if (!isNullOrEmpty(otherResponse.getContainersFromPreviousAttempts())) {
if (!isNullOrEmpty(homeResponse.getContainersFromPreviousAttempts())) {
homeResponse.getContainersFromPreviousAttempts()
.addAll(otherResponse.getContainersFromPreviousAttempts());
} else {
homeResponse.setContainersFromPreviousAttempts(
otherResponse.getContainersFromPreviousAttempts());
}
}
if (!isNullOrEmpty(otherResponse.getNMTokensFromPreviousAttempts())) {
if (!isNullOrEmpty(homeResponse.getNMTokensFromPreviousAttempts())) {
homeResponse.getNMTokensFromPreviousAttempts()
.addAll(otherResponse.getNMTokensFromPreviousAttempts());
} else {
homeResponse.setNMTokensFromPreviousAttempts(
otherResponse.getNMTokensFromPreviousAttempts());
}
}
}
/**
* Try re-attach to all existing and running UAMs in secondary sub-clusters
* launched by previous application attempts if any. All running containers in
* the UAMs will be combined into the registerResponse. For the first attempt,
* the registry will be empty for this application and thus no-op here.
*/
protected void reAttachUAMAndMergeRegisterResponse(
RegisterApplicationMasterResponse homeResponse,
final ApplicationId appId) {
if (this.registryClient == null) {
// Both AMRMProxy HA and NM work preserving restart is not enabled
LOG.warn("registryClient is null, skip attaching existing UAM if any");
return;
}
// Load existing running UAMs from the previous attempts from
// registry, if any
Map<String, Token<AMRMTokenIdentifier>> uamMap =
this.registryClient.loadStateFromRegistry(appId);
if (uamMap.size() == 0) {
LOG.info("No existing UAM for application {} found in Yarn Registry",
appId);
return;
}
LOG.info("Found {} existing UAMs for application {} in Yarn Registry. "
+ "Reattaching in parallel", uamMap.size(), appId);
ExecutorCompletionService<RegisterApplicationMasterResponse>
completionService = new ExecutorCompletionService<>(this.threadpool);
for (Entry<String, Token<AMRMTokenIdentifier>> entry : uamMap.entrySet()) {
final SubClusterId subClusterId =
SubClusterId.newInstance(entry.getKey());
final Token<AMRMTokenIdentifier> amrmToken = entry.getValue();
completionService
.submit(new Callable<RegisterApplicationMasterResponse>() {
@Override
public RegisterApplicationMasterResponse call() throws Exception {
RegisterApplicationMasterResponse response = null;
try {
// Create a config loaded with federation on and subclusterId
// for each UAM
YarnConfiguration config = new YarnConfiguration(getConf());
FederationProxyProviderUtil.updateConfForFederation(config,
subClusterId.getId());
uamPool.reAttachUAM(subClusterId.getId(), config, appId,
amRegistrationResponse.getQueue(),
getApplicationContext().getUser(), homeSubClusterId.getId(),
amrmToken, subClusterId.toString());
secondaryRelayers.put(subClusterId.getId(),
uamPool.getAMRMClientRelayer(subClusterId.getId()));
response = uamPool.registerApplicationMaster(
subClusterId.getId(), amRegistrationRequest);
// Set sub-cluster to be timed out initially
lastSCResponseTime.put(subClusterId,
clock.getTime() - subClusterTimeOut);
if (response != null
&& response.getContainersFromPreviousAttempts() != null) {
cacheAllocatedContainers(
response.getContainersFromPreviousAttempts(),
subClusterId);
}
LOG.info("UAM {} reattached for {}", subClusterId, appId);
} catch (Throwable e) {
LOG.error(
"Reattaching UAM " + subClusterId + " failed for " + appId,
e);
}
return response;
}
});
}
// Wait for the re-attach responses
for (int i = 0; i < uamMap.size(); i++) {
try {
Future<RegisterApplicationMasterResponse> future =
completionService.take();
RegisterApplicationMasterResponse registerResponse = future.get();
if (registerResponse != null) {
LOG.info("Merging register response for {}", appId);
mergeRegisterResponse(homeResponse, registerResponse);
}
} catch (Exception e) {
LOG.warn("Reattaching UAM failed for ApplicationId: " + appId, e);
}
}
}
private SubClusterId getSubClusterForNode(String nodeName) {
SubClusterId subClusterId = null;
try {
subClusterId = this.subClusterResolver.getSubClusterForNode(nodeName);
} catch (YarnException e) {
LOG.error("Failed to resolve sub-cluster for node " + nodeName
+ ", skipping this node", e);
return null;
}
if (subClusterId == null) {
LOG.error("Failed to resolve sub-cluster for node {}, skipping this node",
nodeName);
return null;
}
return subClusterId;
}
/**
* In federation, the heart beat request needs to be sent to all the sub
* clusters from which the AM has requested containers. This method splits the
* specified AllocateRequest from the AM and creates a new request for each
* sub-cluster RM.
*/
private Map<SubClusterId, AllocateRequest> splitAllocateRequest(
AllocateRequest request) throws YarnException {
Map<SubClusterId, AllocateRequest> requestMap =
new HashMap<SubClusterId, AllocateRequest>();
// Create heart beat request for home sub-cluster resource manager
findOrCreateAllocateRequestForSubCluster(this.homeSubClusterId, request,
requestMap);
// Create heart beat request instances for all other already registered
// sub-cluster resource managers
Set<String> subClusterIds = this.uamPool.getAllUAMIds();
for (String subClusterId : subClusterIds) {
findOrCreateAllocateRequestForSubCluster(
SubClusterId.newInstance(subClusterId), request, requestMap);
}
if (!isNullOrEmpty(request.getAskList())) {
// Ask the federation policy interpreter to split the ask list for
// sending it to all the sub-cluster resource managers.
Map<SubClusterId, List<ResourceRequest>> asks =
splitResourceRequests(request.getAskList());
// Add the askLists to the corresponding sub-cluster requests.
for (Entry<SubClusterId, List<ResourceRequest>> entry : asks.entrySet()) {
AllocateRequest newRequest = findOrCreateAllocateRequestForSubCluster(
entry.getKey(), request, requestMap);
newRequest.getAskList().addAll(entry.getValue());
}
}
if (request.getResourceBlacklistRequest() != null) {
if (!isNullOrEmpty(
request.getResourceBlacklistRequest().getBlacklistAdditions())) {
for (String resourceName : request.getResourceBlacklistRequest()
.getBlacklistAdditions()) {
SubClusterId subClusterId = getSubClusterForNode(resourceName);
if (subClusterId != null) {
AllocateRequest newRequest =
findOrCreateAllocateRequestForSubCluster(subClusterId, request,
requestMap);
newRequest.getResourceBlacklistRequest().getBlacklistAdditions()
.add(resourceName);
}
}
}
if (!isNullOrEmpty(
request.getResourceBlacklistRequest().getBlacklistRemovals())) {
for (String resourceName : request.getResourceBlacklistRequest()
.getBlacklistRemovals()) {
SubClusterId subClusterId = getSubClusterForNode(resourceName);
if (subClusterId != null) {
AllocateRequest newRequest =
findOrCreateAllocateRequestForSubCluster(subClusterId, request,
requestMap);
newRequest.getResourceBlacklistRequest().getBlacklistRemovals()
.add(resourceName);
}
}
}
}
if (!isNullOrEmpty(request.getReleaseList())) {
for (ContainerId cid : request.getReleaseList()) {
if (warnIfNotExists(cid, "release")) {
SubClusterId subClusterId =
this.containerIdToSubClusterIdMap.get(cid);
AllocateRequest newRequest = requestMap.get(subClusterId);
newRequest.getReleaseList().add(cid);
}
}
}
if (!isNullOrEmpty(request.getUpdateRequests())) {
for (UpdateContainerRequest ucr : request.getUpdateRequests()) {
if (warnIfNotExists(ucr.getContainerId(), "update")) {
SubClusterId subClusterId =
this.containerIdToSubClusterIdMap.get(ucr.getContainerId());
AllocateRequest newRequest = requestMap.get(subClusterId);
newRequest.getUpdateRequests().add(ucr);
}
}
}
return requestMap;
}
/**
* This methods sends the specified AllocateRequests to the appropriate
* sub-cluster resource managers asynchronously.
*
* @param requests contains the heart beat requests to send to the resource
* manager keyed by the sub-cluster id
* @throws YarnException
* @throws IOException
*/
private void sendRequestsToResourceManagers(
Map<SubClusterId, AllocateRequest> requests)
throws YarnException, IOException {
// Create new UAM instances for the sub-cluster that we haven't seen before
List<SubClusterId> newSubClusters =
registerAndAllocateWithNewSubClusters(requests);
// Now that all the registrations are done, send the allocation request
// to the sub-cluster RMs asynchronously and don't wait for the response.
// The responses will arrive asynchronously and will be added to the
// response sink, then merged and sent to the application master.
for (Entry<SubClusterId, AllocateRequest> entry : requests.entrySet()) {
SubClusterId subClusterId = entry.getKey();
if (newSubClusters.contains(subClusterId)) {
// For new sub-clusters, we have already sent the request right after
// register in the async thread
continue;
}
if (subClusterId.equals(this.homeSubClusterId)) {
// Request for the home sub-cluster resource manager
this.homeHeartbeartHandler.allocateAsync(entry.getValue(),
new HeartbeatCallBack(this.homeSubClusterId, false));
} else {
if (!this.uamPool.hasUAMId(subClusterId.getId())) {
throw new YarnException("UAM not found for " + this.attemptId
+ " in sub-cluster " + subClusterId);
}
this.uamPool.allocateAsync(subClusterId.getId(), entry.getValue(),
new HeartbeatCallBack(subClusterId, true));
}
}
}
/**
* This method ensures that Unmanaged AMs are created for newly specified
* sub-clusters, registers with the corresponding resource managers and send
* the first allocate request async.
*/
private List<SubClusterId> registerAndAllocateWithNewSubClusters(
final Map<SubClusterId, AllocateRequest> requests) throws IOException {
// Check to see if there are any new sub-clusters in this request
// list and create and register Unmanaged AM instance for the new ones
List<SubClusterId> newSubClusters = new ArrayList<>();
for (SubClusterId subClusterId : requests.keySet()) {
if (!subClusterId.equals(this.homeSubClusterId)
&& !this.uamPool.hasUAMId(subClusterId.getId())) {
newSubClusters.add(subClusterId);
// Set sub-cluster to be timed out initially
lastSCResponseTime.put(subClusterId,
clock.getTime() - subClusterTimeOut);
}
}
this.uamRegisterFutures.clear();
for (final SubClusterId scId : newSubClusters) {
Future<?> future = this.threadpool.submit(new Runnable() {
@Override
public void run() {
String subClusterId = scId.getId();
// Create a config loaded with federation on and subclusterId
// for each UAM
YarnConfiguration config = new YarnConfiguration(getConf());
FederationProxyProviderUtil.updateConfForFederation(config,
subClusterId);
RegisterApplicationMasterResponse uamResponse = null;
Token<AMRMTokenIdentifier> token = null;
try {
// For appNameSuffix, use subClusterId of the home sub-cluster
token = uamPool.launchUAM(subClusterId, config,
attemptId.getApplicationId(), amRegistrationResponse.getQueue(),
getApplicationContext().getUser(), homeSubClusterId.toString(),
true, subClusterId);
secondaryRelayers.put(subClusterId,
uamPool.getAMRMClientRelayer(subClusterId));
uamResponse = uamPool.registerApplicationMaster(subClusterId,
amRegistrationRequest);
} catch (Throwable e) {
LOG.error("Failed to register application master: " + subClusterId
+ " Application: " + attemptId, e);
// TODO: UAM registration for this sub-cluster RM
// failed. For now, we ignore the resource requests and continue
// but we need to fix this and handle this situation. One way would
// be to send the request to another RM by consulting the policy.
return;
}
uamRegistrations.put(scId, uamResponse);
LOG.info("Successfully registered unmanaged application master: "
+ subClusterId + " ApplicationId: " + attemptId);
try {
uamPool.allocateAsync(subClusterId, requests.get(scId),
new HeartbeatCallBack(scId, true));
} catch (Throwable e) {
LOG.error("Failed to allocate async to " + subClusterId
+ " Application: " + attemptId, e);
}
// Save the UAM token in registry or NMSS
try {
if (registryClient != null) {
registryClient.writeAMRMTokenForUAM(attemptId.getApplicationId(),
subClusterId, token);
} else if (getNMStateStore() != null) {
getNMStateStore().storeAMRMProxyAppContextEntry(attemptId,
NMSS_SECONDARY_SC_PREFIX + subClusterId,
token.encodeToUrlString().getBytes(STRING_TO_BYTE_FORMAT));
}
} catch (Throwable e) {
LOG.error("Failed to persist UAM token from " + subClusterId
+ " Application: " + attemptId, e);
}
}
});
this.uamRegisterFutures.put(scId, future);
}
return newSubClusters;
}
/**
* Prepare the base allocation response. Use lastSCResponse and
* lastHeartbeatTimeStamp to assemble entries about cluster-wide info, e.g.
* AvailableResource, NumClusterNodes.
*/
protected AllocateResponse generateBaseAllocationResponse() {
AllocateResponse baseResponse =
RECORD_FACTORY.newRecordInstance(AllocateResponse.class);
baseResponse.setAvailableResources(Resource.newInstance(0, 0));
baseResponse.setNumClusterNodes(0);
Set<SubClusterId> expiredSC = getTimedOutSCs(false);
for (Entry<SubClusterId, AllocateResponse> entry : lastSCResponse
.entrySet()) {
if (expiredSC.contains(entry.getKey())) {
// Skip expired sub-clusters
continue;
}
AllocateResponse response = entry.getValue();
if (response.getAvailableResources() != null) {
baseResponse.setAvailableResources(
Resources.add(baseResponse.getAvailableResources(),
response.getAvailableResources()));
}
baseResponse.setNumClusterNodes(
baseResponse.getNumClusterNodes() + response.getNumClusterNodes());
}
return baseResponse;
}
/**
* Merge the responses from all sub-clusters that we received asynchronously
* and keeps track of the containers received from each sub-cluster resource
* managers.
*/
private void mergeAllocateResponses(AllocateResponse mergedResponse) {
synchronized (this.asyncResponseSink) {
for (Entry<SubClusterId, List<AllocateResponse>> entry :
this.asyncResponseSink.entrySet()) {
SubClusterId subClusterId = entry.getKey();
List<AllocateResponse> responses = entry.getValue();
if (responses.size() > 0) {
for (AllocateResponse response : responses) {
removeFinishedContainersFromCache(
response.getCompletedContainersStatuses());
cacheAllocatedContainers(response.getAllocatedContainers(),
subClusterId);
mergeAllocateResponse(mergedResponse, response, subClusterId);
}
responses.clear();
}
}
}
}
/**
* Removes the finished containers from the local cache.
*/
private void removeFinishedContainersFromCache(
List<ContainerStatus> finishedContainers) {
for (ContainerStatus container : finishedContainers) {
LOG.debug("Completed container {}", container);
if (containerIdToSubClusterIdMap
.containsKey(container.getContainerId())) {
containerIdToSubClusterIdMap.remove(container.getContainerId());
}
}
}
/**
* Helper method for merging the registration responses from the secondary sub
* cluster RMs into the allocate response to return to the AM.
*/
private void mergeRegistrationResponses(AllocateResponse homeResponse,
Map<SubClusterId, RegisterApplicationMasterResponse> registrations) {
for (Entry<SubClusterId, RegisterApplicationMasterResponse> entry :
registrations.entrySet()) {
RegisterApplicationMasterResponse registration = entry.getValue();
if (!isNullOrEmpty(registration.getContainersFromPreviousAttempts())) {
List<Container> tempContainers = homeResponse.getAllocatedContainers();
if (!isNullOrEmpty(tempContainers)) {
tempContainers
.addAll(registration.getContainersFromPreviousAttempts());
homeResponse.setAllocatedContainers(tempContainers);
} else {
homeResponse.setAllocatedContainers(
registration.getContainersFromPreviousAttempts());
}
cacheAllocatedContainers(
registration.getContainersFromPreviousAttempts(), entry.getKey());
}
if (!isNullOrEmpty(registration.getNMTokensFromPreviousAttempts())) {
List<NMToken> tempTokens = homeResponse.getNMTokens();
if (!isNullOrEmpty(tempTokens)) {
tempTokens.addAll(registration.getNMTokensFromPreviousAttempts());
homeResponse.setNMTokens(tempTokens);
} else {
homeResponse
.setNMTokens(registration.getNMTokensFromPreviousAttempts());
}
}
}
}
@VisibleForTesting
protected void mergeAllocateResponse(AllocateResponse homeResponse,
AllocateResponse otherResponse, SubClusterId otherRMAddress) {
if (otherResponse.getAMRMToken() != null) {
// Propagate only the new amrmToken from home sub-cluster back to
// AMRMProxyService
if (otherRMAddress.equals(this.homeSubClusterId)) {
homeResponse.setAMRMToken(otherResponse.getAMRMToken());
} else {
LOG.warn("amrmToken from UAM {} not null, it should be null here",
otherRMAddress);
}
}
if (!isNullOrEmpty(otherResponse.getAllocatedContainers())) {
if (!isNullOrEmpty(homeResponse.getAllocatedContainers())) {
homeResponse.getAllocatedContainers()
.addAll(otherResponse.getAllocatedContainers());
} else {
homeResponse
.setAllocatedContainers(otherResponse.getAllocatedContainers());
}
}
if (!isNullOrEmpty(otherResponse.getCompletedContainersStatuses())) {
if (!isNullOrEmpty(homeResponse.getCompletedContainersStatuses())) {
homeResponse.getCompletedContainersStatuses()
.addAll(otherResponse.getCompletedContainersStatuses());
} else {
homeResponse.setCompletedContainersStatuses(
otherResponse.getCompletedContainersStatuses());
}
}
if (!isNullOrEmpty(otherResponse.getUpdatedNodes())) {
if (!isNullOrEmpty(homeResponse.getUpdatedNodes())) {
homeResponse.getUpdatedNodes().addAll(otherResponse.getUpdatedNodes());
} else {
homeResponse.setUpdatedNodes(otherResponse.getUpdatedNodes());
}
}
if (otherResponse.getApplicationPriority() != null) {
homeResponse.setApplicationPriority(
otherResponse.getApplicationPriority());
}
homeResponse.setNumClusterNodes(
homeResponse.getNumClusterNodes() + otherResponse.getNumClusterNodes());
PreemptionMessage homePreempMessage = homeResponse.getPreemptionMessage();
PreemptionMessage otherPreempMessage = otherResponse.getPreemptionMessage();
if (homePreempMessage == null && otherPreempMessage != null) {
homeResponse.setPreemptionMessage(otherPreempMessage);
}
if (homePreempMessage != null && otherPreempMessage != null) {
PreemptionContract par1 = homePreempMessage.getContract();
PreemptionContract par2 = otherPreempMessage.getContract();
if (par1 == null && par2 != null) {
homePreempMessage.setContract(par2);
}
if (par1 != null && par2 != null) {
par1.getResourceRequest().addAll(par2.getResourceRequest());
par1.getContainers().addAll(par2.getContainers());
}
StrictPreemptionContract spar1 = homePreempMessage.getStrictContract();
StrictPreemptionContract spar2 = otherPreempMessage.getStrictContract();
if (spar1 == null && spar2 != null) {
homePreempMessage.setStrictContract(spar2);
}
if (spar1 != null && spar2 != null) {
spar1.getContainers().addAll(spar2.getContainers());
}
}
if (!isNullOrEmpty(otherResponse.getNMTokens())) {
if (!isNullOrEmpty(homeResponse.getNMTokens())) {
homeResponse.getNMTokens().addAll(otherResponse.getNMTokens());
} else {
homeResponse.setNMTokens(otherResponse.getNMTokens());
}
}
if (!isNullOrEmpty(otherResponse.getUpdatedContainers())) {
if (!isNullOrEmpty(homeResponse.getUpdatedContainers())) {
homeResponse.getUpdatedContainers()
.addAll(otherResponse.getUpdatedContainers());
} else {
homeResponse.setUpdatedContainers(otherResponse.getUpdatedContainers());
}
}
if (!isNullOrEmpty(otherResponse.getUpdateErrors())) {
if (!isNullOrEmpty(homeResponse.getUpdateErrors())) {
homeResponse.getUpdateErrors().addAll(otherResponse.getUpdateErrors());
} else {
homeResponse.setUpdateErrors(otherResponse.getUpdateErrors());
}
}
}
/**
* Add allocated containers to cache mapping.
*/
private void cacheAllocatedContainers(List<Container> containers,
SubClusterId subClusterId) {
for (Container container : containers) {
SubClusterId chooseSubClusterId = SubClusterId.newInstance(subClusterId.toString());
LOG.debug("Adding container {}", container);
if (this.containerIdToSubClusterIdMap.containsKey(container.getId())) {
SubClusterId existingSubClusterId =
this.containerIdToSubClusterIdMap.get(container.getId());
if (existingSubClusterId.equals(subClusterId)) {
/*
* When RM fails over, the new RM master might send out the same
* container allocation more than once.
*
* It is also possible because of a recent NM restart with NM recovery
* enabled. We recover running containers from RM. But RM might not
* notified AM of some of these containers yet. When RM dose notify,
* we will already have these containers in the map.
*
* Either case, just warn and move on.
*/
LOG.warn(
"Duplicate containerID: {} found in the allocated containers"
+ " from same sub-cluster: {}, so ignoring.",
container.getId(), subClusterId);
} else {
LOG.info("Duplicate containerID found in the allocated containers. " +
"try to re-pick the sub-cluster.");
// The same container allocation from different sub-clusters,
// something is wrong.
try {
boolean existAllocatedScHealth = isSCHealth(existingSubClusterId);
boolean newAllocatedScHealth = isSCHealth(subClusterId);
if (existAllocatedScHealth) {
// If the previous RM which allocated Container is normal,
// the previous RM will be used first
LOG.info("Use Previous Allocated Container's subCluster. " +
"ContainerId: {} ApplicationId: {} From RM: {}.", this.attemptId,
container.getId(), existingSubClusterId);
chooseSubClusterId = existingSubClusterId;
} else if (newAllocatedScHealth) {
// If the previous RM which allocated Container is abnormal,
// but the RM of the newly allocated Container is normal, use the new RM
LOG.info("Use Newly Allocated Container's subCluster. " +
"ApplicationId: {} ContainerId: {} From RM: {}.", this.attemptId,
container.getId(), subClusterId);
chooseSubClusterId = subClusterId;
} else {
// There is a very small probability that an exception will be thrown.
// The RM of the previously allocated Container
// and the RM of the newly allocated Container are not normal.
throw new YarnRuntimeException(
" Can't use any subCluster because an exception occurred" +
" ContainerId: " + container.getId() + " ApplicationId: " + this.attemptId +
" From RM: " + subClusterId + ". " +
" Previous Container was From subCluster: " + existingSubClusterId);
}
} catch (Exception ex) {
// An exception occurred
throw new YarnRuntimeException(
" Can't use any subCluster because an exception occurred" +
" ContainerId: " + container.getId() + " ApplicationId: " + this.attemptId +
" From RM: " + subClusterId + ". " +
" Previous Container was From subCluster: " + existingSubClusterId, ex);
}
}
}
this.containerIdToSubClusterIdMap.put(container.getId(), chooseSubClusterId);
}
}
/**
* Check to see if an AllocateRequest exists in the Map for the specified sub
* cluster. If not found, create a new one, copy the value of responseId and
* progress from the originalAMRequest, save it in the specified Map and
* return the new instance. If found, just return the old instance.
*/
private static AllocateRequest findOrCreateAllocateRequestForSubCluster(
SubClusterId subClusterId, AllocateRequest originalAMRequest,
Map<SubClusterId, AllocateRequest> requestMap) {
AllocateRequest newRequest = null;
if (requestMap.containsKey(subClusterId)) {
newRequest = requestMap.get(subClusterId);
} else {
newRequest = createAllocateRequest();
newRequest.setResponseId(originalAMRequest.getResponseId());
newRequest.setProgress(originalAMRequest.getProgress());
requestMap.put(subClusterId, newRequest);
}
return newRequest;
}
/**
* Create an empty AllocateRequest instance.
*/
private static AllocateRequest createAllocateRequest() {
AllocateRequest request =
RECORD_FACTORY.newRecordInstance(AllocateRequest.class);
request.setAskList(new ArrayList<ResourceRequest>());
request.setReleaseList(new ArrayList<ContainerId>());
ResourceBlacklistRequest blackList =
ResourceBlacklistRequest.newInstance(null, null);
blackList.setBlacklistAdditions(new ArrayList<String>());
blackList.setBlacklistRemovals(new ArrayList<String>());
request.setResourceBlacklistRequest(blackList);
request.setUpdateRequests(new ArrayList<UpdateContainerRequest>());
return request;
}
protected Set<SubClusterId> getTimedOutSCs(boolean verbose) {
Set<SubClusterId> timedOutSCs = new HashSet<>();
for (Map.Entry<SubClusterId, Long> entry : this.lastSCResponseTime
.entrySet()) {
if (entry.getValue() > this.lastAMHeartbeatTime) {
// AM haven't heartbeat to us (and thus we to all SCs) for a long time,
// should not consider the SC as timed out
continue;
}
long duration = this.clock.getTime() - entry.getValue();
if (duration > this.subClusterTimeOut) {
if (verbose) {
LOG.warn(
"Subcluster {} doesn't have a successful heartbeat"
+ " for {} seconds for {}",
entry.getKey(), (double) duration / 1000, this.attemptId);
}
timedOutSCs.add(entry.getKey());
}
}
return timedOutSCs;
}
/**
* Check to see if the specified containerId exists in the cache and log an
* error if not found.
*
* @param containerId the container id
* @param actionName the name of the action
* @return true if the container exists in the map, false otherwise
*/
private boolean warnIfNotExists(ContainerId containerId, String actionName) {
if (!this.containerIdToSubClusterIdMap.containsKey(containerId)) {
LOG.error(
"AM is trying to {} a container {} that does not exist. Might happen "
+ "shortly after NM restart when NM recovery is enabled",
actionName, containerId.toString());
return false;
}
return true;
}
/**
* Splits the specified request to send it to different sub clusters. The
* splitting algorithm is very simple. If the request does not have a node
* preference, the policy decides the sub cluster. If the request has a node
* preference and if locality is required, then it is sent to the sub cluster
* that contains the requested node. If node preference is specified and
* locality is not required, then the policy decides the sub cluster.
*
* @param askList the ask list to split
* @return the split asks
* @throws YarnException if split fails
*/
protected Map<SubClusterId, List<ResourceRequest>> splitResourceRequests(
List<ResourceRequest> askList) throws YarnException {
return policyInterpreter.splitResourceRequests(askList,
getTimedOutSCs(true));
}
@VisibleForTesting
protected int getUnmanagedAMPoolSize() {
return this.uamPool.getAllUAMIds().size();
}
@VisibleForTesting
protected UnmanagedAMPoolManager getUnmanagedAMPool() {
return this.uamPool;
}
@VisibleForTesting
protected Map<SubClusterId, Future<?>> getUamRegisterFutures() {
return this.uamRegisterFutures;
}
@VisibleForTesting
public Map<SubClusterId, List<AllocateResponse>> getAsyncResponseSink() {
return this.asyncResponseSink;
}
/**
* Async callback handler for heart beat response from all sub-clusters.
*/
private class HeartbeatCallBack implements AsyncCallback<AllocateResponse> {
private SubClusterId subClusterId;
private boolean isUAM;
HeartbeatCallBack(SubClusterId subClusterId, boolean isUAM) {
this.subClusterId = subClusterId;
this.isUAM = isUAM;
}
@Override
public void callback(AllocateResponse response) {
org.apache.hadoop.yarn.api.records.Token amrmToken =
response.getAMRMToken();
synchronized (asyncResponseSink) {
List<AllocateResponse> responses = null;
if (asyncResponseSink.containsKey(subClusterId)) {
responses = asyncResponseSink.get(subClusterId);
} else {
responses = new ArrayList<>();
asyncResponseSink.put(subClusterId, responses);
}
responses.add(response);
if (this.isUAM) {
// Do not further propagate the new amrmToken for UAM
response.setAMRMToken(null);
}
// Notify main thread about the response arrival
asyncResponseSink.notifyAll();
}
lastSCResponse.put(subClusterId, response);
lastSCResponseTime.put(subClusterId, clock.getTime());
// Notify policy of allocate response
try {
policyInterpreter.notifyOfResponse(subClusterId, response);
} catch (YarnException e) {
LOG.warn("notifyOfResponse for policy failed for sub-cluster "
+ subClusterId, e);
}
// Save the new AMRMToken for the UAM if present
// Do this last because it can be slow...
if (this.isUAM && amrmToken != null) {
Token<AMRMTokenIdentifier> newToken = ConverterUtils
.convertFromYarn(amrmToken, (Text) null);
// Do not further propagate the new amrmToken for UAM
response.setAMRMToken(null);
// Update the token in registry or NMSS
if (registryClient != null) {
if (registryClient.writeAMRMTokenForUAM(attemptId.getApplicationId(),
subClusterId.getId(), newToken)) {
try {
AMRMTokenIdentifier identifier = new AMRMTokenIdentifier();
identifier.readFields(new DataInputStream(
new ByteArrayInputStream(newToken.getIdentifier())));
LOG.info(
"Received new UAM amrmToken with keyId {} and "
+ "service {} from {} for {}, written to Registry",
identifier.getKeyId(), newToken.getService(), subClusterId,
attemptId);
} catch (IOException e) {
}
}
} else if (getNMStateStore() != null) {
try {
getNMStateStore().storeAMRMProxyAppContextEntry(attemptId,
NMSS_SECONDARY_SC_PREFIX + subClusterId.getId(),
newToken.encodeToUrlString().getBytes(STRING_TO_BYTE_FORMAT));
} catch (IOException e) {
LOG.error("Error storing UAM token as AMRMProxy "
+ "context entry in NMSS for " + attemptId, e);
}
}
}
}
}
/**
* Private structure for encapsulating SubClusterId and
* FinishApplicationMasterResponse instances.
*/
private static class FinishApplicationMasterResponseInfo {
private FinishApplicationMasterResponse response;
private String subClusterId;
FinishApplicationMasterResponseInfo(
FinishApplicationMasterResponse response, String subClusterId) {
this.response = response;
this.subClusterId = subClusterId;
}
public FinishApplicationMasterResponse getResponse() {
return response;
}
public String getSubClusterId() {
return subClusterId;
}
}
/**
* Utility method to check if the specified Collection is null or empty.
*
* @param c the collection object
* @param <T> element type of the collection
* @return whether is it is null or empty
*/
public static <T> boolean isNullOrEmpty(Collection<T> c) {
return (c == null || c.size() == 0);
}
/**
* Utility method to check if the specified Collection is null or empty.
*
* @param c the map object
* @param <T1> key type of the map
* @param <T2> value type of the map
* @return whether is it is null or empty
*/
public static <T1, T2> boolean isNullOrEmpty(Map<T1, T2> c) {
return (c == null || c.size() == 0);
}
@VisibleForTesting
protected void cacheAllocatedContainersForSubClusterId(
List<Container> containers, SubClusterId subClusterId) {
cacheAllocatedContainers(containers, subClusterId);
}
@VisibleForTesting
protected Map<ContainerId, SubClusterId> getContainerIdToSubClusterIdMap() {
return containerIdToSubClusterIdMap;
}
private boolean isSCHealth(SubClusterId subClusterId) throws YarnException {
Set<SubClusterId> timeOutScs = getTimedOutSCs(true);
SubClusterInfo subClusterInfo = federationFacade.getSubCluster(subClusterId);
if (timeOutScs.contains(subClusterId) ||
subClusterInfo == null || subClusterInfo.getState().isUnusable()) {
return false;
}
return true;
}
}
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