hadoop ServiceScheduler 源码
haddop ServiceScheduler 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core/src/main/java/org/apache/hadoop/yarn/service/ServiceScheduler.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.service;
import org.apache.hadoop.thirdparty.com.google.common.cache.CacheBuilder;
import org.apache.hadoop.thirdparty.com.google.common.cache.CacheLoader;
import org.apache.hadoop.thirdparty.com.google.common.cache.LoadingCache;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource.Builder;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
import org.apache.hadoop.registry.client.api.RegistryOperations;
import org.apache.hadoop.registry.client.api.RegistryOperationsFactory;
import org.apache.hadoop.registry.client.binding.RegistryPathUtils;
import org.apache.hadoop.registry.client.binding.RegistryUtils;
import org.apache.hadoop.registry.client.types.ServiceRecord;
import org.apache.hadoop.registry.client.types.yarn.PersistencePolicies;
import org.apache.hadoop.registry.client.types.yarn.YarnRegistryAttributes;
import org.apache.hadoop.security.HadoopKerberosName;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.service.CompositeService;
import org.apache.hadoop.yarn.api.ApplicationConstants;
import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterResponse;
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.ContainerStatus;
import org.apache.hadoop.yarn.api.records.FinalApplicationStatus;
import org.apache.hadoop.yarn.api.records.NodeReport;
import org.apache.hadoop.yarn.api.records.RejectedSchedulingRequest;
import org.apache.hadoop.yarn.api.records.Resource;
import org.apache.hadoop.yarn.api.records.UpdatedContainer;
import org.apache.hadoop.yarn.client.api.AMRMClient;
import org.apache.hadoop.yarn.client.api.TimelineV2Client;
import org.apache.hadoop.yarn.client.api.async.AMRMClientAsync;
import org.apache.hadoop.yarn.client.api.async.NMClientAsync;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.event.AsyncDispatcher;
import org.apache.hadoop.yarn.event.EventHandler;
import org.apache.hadoop.yarn.exceptions.YarnException;
import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
import org.apache.hadoop.yarn.service.api.ServiceApiConstants;
import org.apache.hadoop.yarn.service.api.records.ContainerState;
import org.apache.hadoop.yarn.service.api.records.Service;
import org.apache.hadoop.yarn.service.api.records.ServiceState;
import org.apache.hadoop.yarn.service.api.records.ConfigFile;
import org.apache.hadoop.yarn.service.component.ComponentRestartPolicy;
import org.apache.hadoop.yarn.service.component.instance.ComponentInstance;
import org.apache.hadoop.yarn.service.component.instance.ComponentInstanceEvent;
import org.apache.hadoop.yarn.service.component.instance.ComponentInstanceEventType;
import org.apache.hadoop.yarn.service.component.Component;
import org.apache.hadoop.yarn.service.component.ComponentEvent;
import org.apache.hadoop.yarn.service.component.ComponentEventType;
import org.apache.hadoop.yarn.service.conf.YarnServiceConf;
import org.apache.hadoop.yarn.service.conf.YarnServiceConstants;
import org.apache.hadoop.yarn.service.containerlaunch.ContainerLaunchService;
import org.apache.hadoop.yarn.service.provider.ProviderUtils;
import org.apache.hadoop.yarn.service.registry.YarnRegistryViewForProviders;
import org.apache.hadoop.yarn.service.timelineservice.ServiceMetricsSink;
import org.apache.hadoop.yarn.service.timelineservice.ServiceTimelinePublisher;
import org.apache.hadoop.yarn.service.utils.HttpUtil;
import org.apache.hadoop.yarn.service.utils.ServiceApiUtil;
import org.apache.hadoop.yarn.service.utils.ServiceRegistryUtils;
import org.apache.hadoop.yarn.service.utils.ServiceUtils;
import org.apache.hadoop.yarn.util.BoundedAppender;
import org.apache.hadoop.yarn.util.Clock;
import org.apache.hadoop.yarn.util.SystemClock;
import org.apache.hadoop.yarn.util.resource.ResourceUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.text.MessageFormat;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import static org.apache.hadoop.fs.FileSystem.FS_DEFAULT_NAME_KEY;
import static org.apache.hadoop.registry.client.api.RegistryConstants.*;
import static org.apache.hadoop.yarn.api.records.ContainerExitStatus
.KILLED_AFTER_APP_COMPLETION;
import static org.apache.hadoop.yarn.service.api.ServiceApiConstants.*;
import static org.apache.hadoop.yarn.service.component.ComponentEventType.*;
import static org.apache.hadoop.yarn.service.component.instance.ComponentInstanceEventType.START;
import static org.apache.hadoop.yarn.service.conf.YarnServiceConstants
.CONTAINER_STATE_REPORT_AS_SERVICE_STATE;
import static org.apache.hadoop.yarn.service.exceptions.LauncherExitCodes
.EXIT_FALSE;
import static org.apache.hadoop.yarn.service.exceptions.LauncherExitCodes
.EXIT_SUCCESS;
/**
*
*/
public class ServiceScheduler extends CompositeService {
private static final Logger LOG =
LoggerFactory.getLogger(ServiceScheduler.class);
private Service app;
// This encapsulates the <code>app</code> with methods to upgrade the app.
private ServiceManager serviceManager;
// component_name -> component
private final Map<String, Component> componentsByName =
new ConcurrentHashMap<>();
// id - > component
protected final Map<Long, Component> componentsById =
new ConcurrentHashMap<>();
private final Map<ContainerId, ComponentInstance> liveInstances =
new ConcurrentHashMap<>();
private ServiceMetrics serviceMetrics;
private ServiceTimelinePublisher serviceTimelinePublisher;
private boolean timelineServiceEnabled;
// Global diagnostics that will be reported to RM on eRxit.
// The unit the number of characters. This will be limited to 64 * 1024
// characters.
private BoundedAppender diagnostics = new BoundedAppender(64 * 1024);
// A cache for loading config files from remote such as hdfs
public LoadingCache<ConfigFile, Object> configFileCache = null;
public ScheduledExecutorService executorService;
public Map<String, String> globalTokens = new HashMap<>();
private AMRMClientAsync<AMRMClient.ContainerRequest> amRMClient;
private NMClientAsync nmClient;
private AsyncDispatcher dispatcher;
private YarnRegistryViewForProviders yarnRegistryOperations;
private ServiceContext context;
private ContainerLaunchService containerLaunchService;
private final Map<ContainerId, ComponentInstance> unRecoveredInstances =
new ConcurrentHashMap<>();
private long containerRecoveryTimeout;
// If even one component of a service uses placement constraints, then use
// placement scheduler to schedule containers for all components (including
// the ones with no constraints). Mixing of container requests and scheduling
// requests for a single service is not recommended.
private boolean hasAtLeastOnePlacementConstraint;
private boolean gracefulStop = false;
private volatile FinalApplicationStatus finalApplicationStatus =
FinalApplicationStatus.ENDED;
private Clock systemClock;
// For unit test override since we don't want to terminate UT process.
private ServiceUtils.ProcessTerminationHandler
terminationHandler = new ServiceUtils.ProcessTerminationHandler();
public ServiceScheduler(ServiceContext context) {
super(context.getService().getName());
this.context = context;
this.app = context.getService();
this.systemClock = SystemClock.getInstance();
}
public void buildInstance(ServiceContext context, Configuration configuration)
throws YarnException, IOException {
app = context.service;
executorService = Executors.newScheduledThreadPool(10);
RegistryOperations registryClient = null;
if (UserGroupInformation.isSecurityEnabled() &&
!StringUtils.isEmpty(context.principal)
&& !StringUtils.isEmpty(context.keytab)) {
Configuration conf = getConfig();
// Only take the first section of the principal
// e.g. hdfs-demo@EXAMPLE.COM will take hdfs-demo
// This is because somehow zookeeper client only uses the first section
// for acl validations.
String username = new HadoopKerberosName(context.principal.trim())
.getServiceName();
LOG.info("Set registry user accounts: sasl:" + username);
conf.set(KEY_REGISTRY_USER_ACCOUNTS, "sasl:" + username);
registryClient = RegistryOperationsFactory
.createKerberosInstance(conf,
"Client", context.principal, context.keytab);
} else {
registryClient = RegistryOperationsFactory
.createInstance("ServiceScheduler", configuration);
}
addIfService(registryClient);
yarnRegistryOperations =
createYarnRegistryOperations(context, registryClient);
// register metrics,
serviceMetrics = ServiceMetrics
.register(app.getName(), "Metrics for service");
serviceMetrics.tag("type", "Metrics type [component or service]", "service");
serviceMetrics.tag("appId", "Service id for service", app.getId());
amRMClient = createAMRMClient();
addIfService(amRMClient);
nmClient = createNMClient();
nmClient.getClient().cleanupRunningContainersOnStop(false);
addIfService(nmClient);
dispatcher = createAsyncDispatcher();
dispatcher.register(ServiceEventType.class, new ServiceEventHandler());
dispatcher.register(ComponentEventType.class,
new ComponentEventHandler());
dispatcher.register(ComponentInstanceEventType.class,
new ComponentInstanceEventHandler());
dispatcher.setDrainEventsOnStop();
addIfService(dispatcher);
containerLaunchService = new ContainerLaunchService(context);
addService(containerLaunchService);
if (YarnConfiguration.timelineServiceV2Enabled(configuration)) {
TimelineV2Client timelineClient = TimelineV2Client
.createTimelineClient(context.attemptId.getApplicationId());
amRMClient.registerTimelineV2Client(timelineClient);
serviceTimelinePublisher = new ServiceTimelinePublisher(timelineClient);
addService(serviceTimelinePublisher);
DefaultMetricsSystem.instance().register("ServiceMetricsSink",
"For processing metrics to ATS",
new ServiceMetricsSink(serviceTimelinePublisher));
LOG.info("Timeline v2 is enabled.");
}
initGlobalTokensForSubstitute(context);
//substitute quicklinks
ProviderUtils.substituteMapWithTokens(app.getQuicklinks(), globalTokens);
createConfigFileCache(context.fs.getFileSystem());
createAllComponents();
containerRecoveryTimeout = YarnServiceConf.getInt(
YarnServiceConf.CONTAINER_RECOVERY_TIMEOUT_MS,
YarnServiceConf.DEFAULT_CONTAINER_RECOVERY_TIMEOUT_MS,
app.getConfiguration(), getConfig());
if (YarnConfiguration
.timelineServiceV2Enabled(getConfig())) {
timelineServiceEnabled = true;
}
serviceManager = createServiceManager();
context.setServiceManager(serviceManager);
}
protected YarnRegistryViewForProviders createYarnRegistryOperations(
ServiceContext context, RegistryOperations registryClient) {
return new YarnRegistryViewForProviders(registryClient,
RegistryUtils.currentUser(), YarnServiceConstants.APP_TYPE, app.getName(),
context.attemptId);
}
protected ServiceManager createServiceManager() {
return new ServiceManager(context);
}
protected AsyncDispatcher createAsyncDispatcher() {
return new AsyncDispatcher("Component dispatcher");
}
protected NMClientAsync createNMClient() {
return NMClientAsync.createNMClientAsync(new NMClientCallback());
}
protected AMRMClientAsync<AMRMClient.ContainerRequest> createAMRMClient() {
return AMRMClientAsync
.createAMRMClientAsync(1000, new AMRMClientCallback());
}
public void setGracefulStop(FinalApplicationStatus applicationStatus) {
this.gracefulStop = true;
this.finalApplicationStatus = applicationStatus;
nmClient.getClient().cleanupRunningContainersOnStop(true);
}
@Override
public void serviceInit(Configuration conf) throws Exception {
try {
buildInstance(context, conf);
} catch (YarnException e) {
throw new YarnRuntimeException(e);
}
super.serviceInit(conf);
}
@Override
public void serviceStop() throws Exception {
LOG.info("Stopping service scheduler");
if (executorService != null) {
executorService.shutdownNow();
}
DefaultMetricsSystem.shutdown();
// only stop the entire service when a graceful stop has been initiated
// (e.g. via client RPC, not through the AM receiving a SIGTERM)
if (gracefulStop) {
if (YarnConfiguration.timelineServiceV2Enabled(getConfig())) {
// mark other component-instances/containers as STOPPED
final Map<ContainerId, ComponentInstance> liveInst =
getLiveInstances();
for (Map.Entry<ContainerId, ComponentInstance> instance : liveInst
.entrySet()) {
if (!ComponentInstance.isFinalState(
instance.getValue().getContainerSpec().getState())) {
LOG.info("{} Component instance state changed from {} to {}",
instance.getValue().getCompInstanceName(),
instance.getValue().getContainerSpec().getState(),
ContainerState.STOPPED);
serviceTimelinePublisher.componentInstanceFinished(
instance.getKey(), KILLED_AFTER_APP_COMPLETION,
ContainerState.STOPPED, getDiagnostics().toString());
}
}
LOG.info("Service state changed to {}", finalApplicationStatus);
// mark attempt as unregistered
serviceTimelinePublisher.serviceAttemptUnregistered(context,
finalApplicationStatus, diagnostics.toString());
}
// unregister AM
amRMClient.unregisterApplicationMaster(finalApplicationStatus,
diagnostics.toString(), "");
LOG.info("Service {} unregistered with RM, with attemptId = {} "
+ ", diagnostics = {} ", app.getName(), context.attemptId,
diagnostics);
}
super.serviceStop();
}
@Override
public void serviceStart() throws Exception {
super.serviceStart();
InetSocketAddress bindAddress = context.clientAMService.getBindAddress();
// When yarn.resourcemanager.placement-constraints.handler is set to
// placement-processor then constraints need to be added during
// registerApplicationMaster.
RegisterApplicationMasterResponse response = amRMClient
.registerApplicationMaster(bindAddress.getHostName(),
bindAddress.getPort(), "N/A");
// Update internal resource types according to response.
if (response.getResourceTypes() != null) {
ResourceUtils.reinitializeResources(response.getResourceTypes());
}
if (response.getClientToAMTokenMasterKey() != null
&& response.getClientToAMTokenMasterKey().remaining() != 0) {
context.secretManager
.setMasterKey(response.getClientToAMTokenMasterKey().array());
}
registerServiceInstance(context.attemptId, app);
// Since AM has been started and registered, the service is in STARTED state
app.setState(ServiceState.STARTED);
ServiceApiUtil.checkServiceDependencySatisified(context.service);
// recover components based on containers sent from RM
recoverComponents(response);
for (Component component : componentsById.values()) {
// Trigger initial evaluation of components
if (component.areDependenciesReady()) {
LOG.info("Triggering initial evaluation of component {}",
component.getName());
ComponentEvent event = new ComponentEvent(component.getName(), FLEX)
.setDesired(component.getComponentSpec().getNumberOfContainers());
component.handle(event);
}
}
}
private void recoverComponents(RegisterApplicationMasterResponse response) {
List<Container> containersFromPrevAttempt = response
.getContainersFromPreviousAttempts();
LOG.info("Received {} containers from previous attempt.",
containersFromPrevAttempt.size());
Map<String, ServiceRecord> existingRecords = new HashMap<>();
List<String> existingComps = null;
try {
existingComps = yarnRegistryOperations.listComponents();
LOG.info("Found {} containers from ZK registry: {}", existingComps.size(),
existingComps);
} catch (Exception e) {
LOG.info("Could not read component paths: {}", e.getMessage());
}
if (existingComps != null) {
for (String existingComp : existingComps) {
try {
ServiceRecord record =
yarnRegistryOperations.getComponent(existingComp);
existingRecords.put(existingComp, record);
} catch (Exception e) {
LOG.warn("Could not resolve record for component {}: {}",
existingComp, e);
}
}
}
for (Container container : containersFromPrevAttempt) {
LOG.info("Handling {} from previous attempt", container.getId());
ServiceRecord record = existingRecords.remove(RegistryPathUtils
.encodeYarnID(container.getId().toString()));
if (record != null) {
Component comp = componentsById.get(container.getAllocationRequestId());
ComponentEvent event =
new ComponentEvent(comp.getName(), CONTAINER_RECOVERED)
.setContainer(container)
.setInstance(comp.getComponentInstance(record.description));
comp.handle(event);
// do not remove requests in this case because we do not know if they
// have already been removed
} else {
LOG.info("Record not found in registry for container {} from previous" +
" attempt, releasing", container.getId());
amRMClient.releaseAssignedContainer(container.getId());
}
}
ApplicationId appId = ApplicationId.fromString(app.getId());
existingRecords.forEach((encodedContainerId, record) -> {
String componentName = record.get(YarnRegistryAttributes.YARN_COMPONENT);
if (componentName != null) {
Component component = componentsByName.get(componentName);
if (component != null) {
ComponentInstance compInstance = component.getComponentInstance(
record.description);
ContainerId containerId = ContainerId.fromString(record.get(
YarnRegistryAttributes.YARN_ID));
if (containerId.getApplicationAttemptId().getApplicationId()
.equals(appId)) {
unRecoveredInstances.put(containerId, compInstance);
component.removePendingInstance(compInstance);
}
}
}
});
if (unRecoveredInstances.size() > 0) {
executorService.schedule(() -> {
synchronized (unRecoveredInstances) {
// after containerRecoveryTimeout, all the containers that haven't be
// recovered by the RM will released. The corresponding Component
// Instances are added to the pending queues of their respective
// component.
unRecoveredInstances.forEach((containerId, instance) -> {
LOG.info("{}, wait on container {} expired",
instance.getCompInstanceId(), containerId);
instance.cleanupRegistryAndCompHdfsDir(containerId);
Component component = componentsByName.get(instance.getCompName());
component.requestContainers(1);
component.reInsertPendingInstance(instance);
amRMClient.releaseAssignedContainer(containerId);
});
unRecoveredInstances.clear();
}
}, containerRecoveryTimeout, TimeUnit.MILLISECONDS);
}
}
private void initGlobalTokensForSubstitute(ServiceContext context) {
// ZK
globalTokens.put(ServiceApiConstants.CLUSTER_ZK_QUORUM, getConfig()
.getTrimmed(KEY_REGISTRY_ZK_QUORUM, DEFAULT_REGISTRY_ZK_QUORUM));
String user = RegistryUtils.currentUser();
globalTokens.put(SERVICE_ZK_PATH,
ServiceRegistryUtils.mkServiceHomePath(user, app.getName()));
globalTokens.put(ServiceApiConstants.USER, user);
String dnsDomain = getConfig().getTrimmed(KEY_DNS_DOMAIN);
if (dnsDomain != null && !dnsDomain.isEmpty()) {
globalTokens.put(ServiceApiConstants.DOMAIN, dnsDomain);
}
// HDFS
String clusterFs = getConfig().getTrimmed(FS_DEFAULT_NAME_KEY);
if (clusterFs != null && !clusterFs.isEmpty()) {
globalTokens.put(ServiceApiConstants.CLUSTER_FS_URI, clusterFs);
globalTokens.put(ServiceApiConstants.CLUSTER_FS_HOST,
URI.create(clusterFs).getHost());
}
globalTokens.put(SERVICE_HDFS_DIR, context.serviceHdfsDir);
// service name
globalTokens.put(SERVICE_NAME_LC, app.getName().toLowerCase());
globalTokens.put(SERVICE_NAME, app.getName());
}
private void createConfigFileCache(final FileSystem fileSystem) {
this.configFileCache =
CacheBuilder.newBuilder().expireAfterAccess(10, TimeUnit.MINUTES)
.build(new CacheLoader<ConfigFile, Object>() {
@Override public Object load(ConfigFile key) throws Exception {
switch (key.getType()) {
case HADOOP_XML:
try (FSDataInputStream input = fileSystem
.open(new Path(key.getSrcFile()))) {
org.apache.hadoop.conf.Configuration confRead =
new org.apache.hadoop.conf.Configuration(false);
confRead.addResource(input);
Map<String, String> map = new HashMap<>(confRead.size());
for (Map.Entry<String, String> entry : confRead) {
map.put(entry.getKey(), entry.getValue());
}
return map;
}
case TEMPLATE:
try (FSDataInputStream fileInput = fileSystem
.open(new Path(key.getSrcFile()))) {
return IOUtils.toString(fileInput, StandardCharsets.UTF_8);
}
default:
return null;
}
}
});
context.configCache = configFileCache;
}
private void registerServiceInstance(ApplicationAttemptId attemptId,
Service service) throws IOException {
LOG.info("Registering " + attemptId + ", " + service.getName()
+ " into registry");
ServiceRecord serviceRecord = new ServiceRecord();
serviceRecord.set(YarnRegistryAttributes.YARN_ID,
attemptId.getApplicationId().toString());
serviceRecord.set(YarnRegistryAttributes.YARN_PERSISTENCE,
PersistencePolicies.APPLICATION);
serviceRecord.description = "YarnServiceMaster";
executorService.submit(new Runnable() {
@Override public void run() {
try {
yarnRegistryOperations.registerSelf(serviceRecord, false);
LOG.info("Registered service under {}; absolute path {}",
yarnRegistryOperations.getSelfRegistrationPath(),
yarnRegistryOperations.getAbsoluteSelfRegistrationPath());
boolean isFirstAttempt = 1 == attemptId.getAttemptId();
// delete the children in case there are any and this is an AM startup.
// just to make sure everything underneath is purged
if (isFirstAttempt) {
yarnRegistryOperations.deleteChildren(
yarnRegistryOperations.getSelfRegistrationPath(), true);
}
} catch (IOException e) {
LOG.error(
"Failed to register app " + app.getName() + " in registry", e);
}
}
});
if (YarnConfiguration.timelineServiceV2Enabled(getConfig())) {
serviceTimelinePublisher.serviceAttemptRegistered(app, getConfig());
}
}
private void createAllComponents() {
long allocateId = 0;
// sort components by dependencies
Collection<org.apache.hadoop.yarn.service.api.records.Component> sortedComponents =
ServiceApiUtil.sortByDependencies(app.getComponents());
for (org.apache.hadoop.yarn.service.api.records.Component compSpec : sortedComponents) {
Component component = new Component(compSpec, allocateId, context);
componentsById.put(allocateId, component);
componentsByName.put(component.getName(), component);
allocateId++;
if (!hasAtLeastOnePlacementConstraint
&& compSpec.getPlacementPolicy() != null
&& compSpec.getPlacementPolicy().getConstraints() != null
&& !compSpec.getPlacementPolicy().getConstraints().isEmpty()) {
hasAtLeastOnePlacementConstraint = true;
}
}
}
private final class ServiceEventHandler
implements EventHandler<ServiceEvent> {
@Override
public void handle(ServiceEvent event) {
try {
serviceManager.handle(event);
} catch (Throwable t) {
LOG.error(MessageFormat
.format("[SERVICE]: Error in handling event type {0}",
event.getType()), t);
}
}
}
private final class ComponentEventHandler
implements EventHandler<ComponentEvent> {
@Override
public void handle(ComponentEvent event) {
Component component = componentsByName.get(event.getName());
if (component == null) {
LOG.error("No component exists for " + event.getName());
return;
}
try {
component.handle(event);
} catch (Throwable t) {
LOG.error(MessageFormat
.format("[COMPONENT {0}]: Error in handling event type {1}",
component.getName(), event.getType()), t);
}
}
}
private final class ComponentInstanceEventHandler
implements EventHandler<ComponentInstanceEvent> {
@Override
public void handle(ComponentInstanceEvent event) {
ComponentInstance instance =
liveInstances.get(event.getContainerId());
if (instance == null) {
LOG.error("No component instance exists for " + event.getContainerId());
return;
}
try {
instance.handle(event);
} catch (Throwable t) {
LOG.error(instance.getCompInstanceId() +
": Error in handling event type " + event.getType(), t);
}
}
}
class AMRMClientCallback extends AMRMClientAsync.AbstractCallbackHandler {
@Override
public void onContainersAllocated(List<Container> containers) {
LOG.info(containers.size() + " containers allocated. ");
for (Container container : containers) {
Component comp = componentsById.get(container.getAllocationRequestId());
ComponentEvent event =
new ComponentEvent(comp.getName(), CONTAINER_ALLOCATED)
.setContainer(container);
dispatcher.getEventHandler().handle(event);
try {
Collection<AMRMClient.ContainerRequest> requests = amRMClient
.getMatchingRequests(container.getAllocationRequestId());
LOG.info("[COMPONENT {}]: remove {} outstanding container requests " +
"for allocateId " + container.getAllocationRequestId(),
comp.getName(), requests.size());
// remove the corresponding request
if (requests.iterator().hasNext()) {
AMRMClient.ContainerRequest request = requests.iterator().next();
amRMClient.removeContainerRequest(request);
}
} catch(Exception e) {
//TODO Due to YARN-7490, exception may be thrown, catch and ignore for
//now.
LOG.error("Exception when removing the matching requests. ", e);
}
}
}
@Override
public void onContainersReceivedFromPreviousAttempts(
List<Container> containers) {
LOG.info("Containers recovered after AM registered: {}", containers);
if (containers == null || containers.isEmpty()) {
return;
}
for (Container container : containers) {
ComponentInstance compInstance;
synchronized (unRecoveredInstances) {
compInstance = unRecoveredInstances.remove(container.getId());
}
if (compInstance != null) {
Component component = componentsById.get(
container.getAllocationRequestId());
ComponentEvent event = new ComponentEvent(component.getName(),
CONTAINER_RECOVERED)
.setInstance(compInstance)
.setContainerId(container.getId())
.setContainer(container);
component.handle(event);
} else {
LOG.info("Not waiting to recover container {}, releasing",
container.getId());
amRMClient.releaseAssignedContainer(container.getId());
}
}
}
@Override
public void onContainersCompleted(List<ContainerStatus> statuses) {
for (ContainerStatus status : statuses) {
ContainerId containerId = status.getContainerId();
ComponentInstance instance = liveInstances.get(status.getContainerId());
if (instance == null) {
LOG.warn(
"Container {} Completed. No component instance exists. exitStatus={}. diagnostics={} ",
containerId, status.getExitStatus(), status.getDiagnostics());
continue;
}
ComponentEvent event =
new ComponentEvent(instance.getCompName(), CONTAINER_COMPLETED)
.setStatus(status).setInstance(instance)
.setContainerId(containerId);
dispatcher.getEventHandler().handle(event);
}
}
@Override
public void onContainersUpdated(List<UpdatedContainer> containers) {
}
@Override public void onShutdownRequest() {
//Was used for non-work-preserving restart in YARN, should be deprecated.
}
@Override public void onNodesUpdated(List<NodeReport> updatedNodes) {
StringBuilder str = new StringBuilder();
str.append("Nodes updated info: ").append(System.lineSeparator());
for (NodeReport report : updatedNodes) {
str.append(report.getNodeId()).append(", state = ")
.append(report.getNodeState()).append(", healthDiagnostics = ")
.append(report.getHealthReport()).append(System.lineSeparator());
}
LOG.warn(str.toString());
}
@Override public float getProgress() {
// get running containers over desired containers
long total = 0;
for (org.apache.hadoop.yarn.service.api.records.Component component : app
.getComponents()) {
total += component.getNumberOfContainers();
}
// Probably due to user flexed down to 0
if (total == 0) {
return 100;
}
return Math.max((float) liveInstances.size() / total * 100, 100);
}
@Override public void onError(Throwable e) {
LOG.error("Error in AMRMClient callback handler ", e);
}
@Override
public void onRequestsRejected(
List<RejectedSchedulingRequest> rejectedSchedulingRequests) {
LOG.error("Error in AMRMClient callback handler. Following scheduling "
+ "requests were rejected: {}", rejectedSchedulingRequests);
}
}
private class NMClientCallback extends NMClientAsync.AbstractCallbackHandler {
@Override public void onContainerStarted(ContainerId containerId,
Map<String, ByteBuffer> allServiceResponse) {
ComponentInstance instance = liveInstances.get(containerId);
if (instance == null) {
LOG.error("No component instance exists for " + containerId);
return;
}
ComponentEvent event =
new ComponentEvent(instance.getCompName(), CONTAINER_STARTED)
.setInstance(instance).setContainerId(containerId);
dispatcher.getEventHandler().handle(event);
}
@Override public void onContainerStatusReceived(ContainerId containerId,
ContainerStatus containerStatus) {
}
@Override public void onContainerStopped(ContainerId containerId) {
}
@Override
public void onStartContainerError(ContainerId containerId, Throwable t) {
ComponentInstance instance = liveInstances.get(containerId);
if (instance == null) {
LOG.error("No component instance exists for " + containerId);
return;
}
LOG.error("Failed to start " + containerId, t);
amRMClient.releaseAssignedContainer(containerId);
// After container released, it'll get CONTAINER_COMPLETED event from RM
// automatically which will trigger stopping COMPONENT INSTANCE
}
@Override
public void onContainerReInitialize(ContainerId containerId) {
ComponentInstance instance = liveInstances.get(containerId);
if (instance == null) {
LOG.error("No component instance exists for {}", containerId);
return;
}
dispatcher.getEventHandler().handle(
new ComponentInstanceEvent(containerId, START));
}
@Override
public void onContainerReInitializeError(ContainerId containerId,
Throwable t) {
ComponentInstance instance = liveInstances.get(containerId);
if (instance == null) {
LOG.error("No component instance exists for {}", containerId);
return;
}
ComponentEvent event = new ComponentEvent(instance.getCompName(),
ComponentEventType.CONTAINER_COMPLETED)
.setInstance(instance).setContainerId(containerId);
dispatcher.getEventHandler().handle(event);
}
@Override public void onContainerResourceIncreased(ContainerId containerId,
Resource resource) {
}
@Override public void onContainerResourceUpdated(ContainerId containerId,
Resource resource) {
}
@Override public void onGetContainerStatusError(ContainerId containerId,
Throwable t) {
}
@Override
public void onIncreaseContainerResourceError(ContainerId containerId,
Throwable t) {
}
@Override
public void onUpdateContainerResourceError(ContainerId containerId,
Throwable t) {
}
@Override
public void onStopContainerError(ContainerId containerId, Throwable t) {
}
}
public ServiceMetrics getServiceMetrics() {
return serviceMetrics;
}
public AMRMClientAsync<AMRMClient.ContainerRequest> getAmRMClient() {
return amRMClient;
}
public NMClientAsync getNmClient() {
return nmClient;
}
public void addLiveCompInstance(ContainerId containerId,
ComponentInstance instance) {
liveInstances.put(containerId, instance);
}
public void removeLiveCompInstance(ContainerId containerId) {
liveInstances.remove(containerId);
}
public YarnRegistryViewForProviders getYarnRegistryOperations() {
return yarnRegistryOperations;
}
public ServiceTimelinePublisher getServiceTimelinePublisher() {
return serviceTimelinePublisher;
}
public Map<ContainerId, ComponentInstance> getLiveInstances() {
return liveInstances;
}
public ContainerLaunchService getContainerLaunchService() {
return containerLaunchService;
}
public ServiceContext getContext() {
return context;
}
public Map<String, Component> getAllComponents() {
return componentsByName;
}
public Service getApp() {
return app;
}
public AsyncDispatcher getDispatcher() {
return dispatcher;
}
public BoundedAppender getDiagnostics() {
return diagnostics;
}
public boolean hasAtLeastOnePlacementConstraint() {
return hasAtLeastOnePlacementConstraint;
}
public boolean terminateServiceIfNeeded(Component component) {
boolean serviceIsTerminated =
terminateServiceIfDominantComponentFinished(component) ||
terminateServiceIfAllComponentsFinished();
return serviceIsTerminated;
}
/**
* If the service state component is finished, the service is also terminated.
* @param component
*/
private boolean terminateServiceIfDominantComponentFinished(Component
component) {
boolean shouldTerminate = false;
boolean componentIsDominant = component.getComponentSpec()
.getConfiguration().getPropertyBool(
CONTAINER_STATE_REPORT_AS_SERVICE_STATE, false);
if (componentIsDominant) {
ComponentRestartPolicy restartPolicy =
component.getRestartPolicyHandler();
if (restartPolicy.shouldTerminate(component)) {
shouldTerminate = true;
boolean isSucceeded = restartPolicy.hasCompletedSuccessfully(component);
org.apache.hadoop.yarn.service.api.records.ComponentState state
= isSucceeded ?
org.apache.hadoop.yarn.service.api.records.ComponentState.SUCCEEDED
: org.apache.hadoop.yarn.service.api.records.ComponentState.FAILED;
LOG.info("{} Component state changed from {} to {}",
component.getName(), component.getComponentSpec().getState(),
state);
component.getComponentSpec().setState(state);
LOG.info("Dominate component {} finished, exiting Service Master... " +
", final status=" + (isSucceeded ? "Succeeded" : "Failed"),
component.getName());
terminateService(isSucceeded);
}
}
return shouldTerminate;
}
/*
* Check if all components of the scheduler finished.
* If all components finished
* (which #failed-instances + #suceeded-instances = #total-n-containers)
* The service will be terminated.
*/
private boolean terminateServiceIfAllComponentsFinished() {
boolean shouldTerminate = true;
// Succeeded comps and failed comps, for logging purposes.
Set<String> succeededComponents = new HashSet<>();
Set<String> failedComponents = new HashSet<>();
for (Component comp : getAllComponents().values()) {
ComponentRestartPolicy restartPolicy = comp.getRestartPolicyHandler();
if (restartPolicy.shouldTerminate(comp)) {
if (restartPolicy.hasCompletedSuccessfully(comp)) {
LOG.info("{} Component state changed from {} to {}",
comp.getName(), comp.getComponentSpec().getState(),
org.apache.hadoop
.yarn.service.api.records.ComponentState.SUCCEEDED);
comp.getComponentSpec().setState(org.apache.hadoop
.yarn.service.api.records.ComponentState.SUCCEEDED);
} else {
LOG.info("{} Component state changed from {} to {}",
comp.getName(), comp.getComponentSpec().getState(),
org.apache.hadoop
.yarn.service.api.records.ComponentState.FAILED);
comp.getComponentSpec().setState(org.apache.hadoop
.yarn.service.api.records.ComponentState.FAILED);
}
if (isTimelineServiceEnabled()) {
// record in ATS
serviceTimelinePublisher.componentFinished(comp.getComponentSpec(),
comp.getComponentSpec().getState(), systemClock.getTime());
}
} else {
shouldTerminate = false;
break;
}
long nFailed = comp.getNumFailedInstances();
if (nFailed > 0) {
failedComponents.add(comp.getName());
} else {
succeededComponents.add(comp.getName());
}
}
if (shouldTerminate) {
LOG.info("All component finished, exiting Service Master... "
+ ", final status=" + (failedComponents.isEmpty() ?
"Succeeded" :
"Failed"));
LOG.info("Succeeded components: [" + org.apache.commons.lang3.StringUtils
.join(succeededComponents, ",") + "]");
LOG.info("Failed components: [" + org.apache.commons.lang3.StringUtils
.join(failedComponents, ",") + "]");
terminateService(failedComponents.isEmpty());
}
return shouldTerminate;
}
private void terminateService(boolean isSucceeded) {
int exitStatus = EXIT_SUCCESS;
if (isSucceeded) {
setGracefulStop(FinalApplicationStatus.SUCCEEDED);
app.setState(ServiceState.SUCCEEDED);
} else {
setGracefulStop(FinalApplicationStatus.FAILED);
app.setState(ServiceState.FAILED);
exitStatus = EXIT_FALSE;
}
getTerminationHandler().terminate(exitStatus);
}
public Clock getSystemClock() {
return systemClock;
}
public boolean isTimelineServiceEnabled() {
return timelineServiceEnabled;
}
public ServiceUtils.ProcessTerminationHandler getTerminationHandler() {
return terminationHandler;
}
public void syncSysFs(Service yarnApp) {
boolean success = true;
Configuration conf = getConfig();
String spec;
boolean useKerberos = UserGroupInformation.isSecurityEnabled();
boolean printSyncResult = false;
try {
String port = conf.get("yarn.nodemanager.webapp.address").split(":")[1];
spec = ServiceApiUtil.jsonSerDeser.toJson(yarnApp);
for (org.apache.hadoop.yarn.service.api.records.Component c :
yarnApp.getComponents()) {
Set<String> nodes = new HashSet<String>();
boolean update = Boolean.parseBoolean(c.getConfiguration()
.getEnv(ApplicationConstants.Environment
.YARN_CONTAINER_RUNTIME_YARN_SYSFS_ENABLE.name()));
if (!update) {
continue;
}
printSyncResult = true;
for (org.apache.hadoop.yarn.service.api.records.Container container :
c.getContainers()) {
String bareHost = container.getBareHost();
nodes.add(bareHost);
}
for (String bareHost : nodes) {
StringBuilder requestPath = new StringBuilder();
if (YarnConfiguration.useHttps(conf)) {
requestPath.append("https://");
} else {
requestPath.append("http://");
}
requestPath.append(bareHost)
.append(":")
.append(port)
.append("/ws/v1/node/yarn/sysfs/")
.append(UserGroupInformation.getCurrentUser()
.getShortUserName())
.append("/")
.append(yarnApp.getId());
if (!useKerberos) {
requestPath.append("?user.name=")
.append(UserGroupInformation.getCurrentUser()
.getShortUserName());
}
Builder builder = HttpUtil.connect(requestPath.toString());
ClientResponse response = builder.put(ClientResponse.class, spec);
if (response.getStatus()!=ClientResponse.Status.OK.getStatusCode()) {
LOG.warn("Error synchronize YARN sysfs: " +
response.getEntity(String.class));
success = false;
}
}
}
if (printSyncResult && success) {
LOG.info("YARN sysfs synchronized.");
}
} catch (IOException | URISyntaxException | InterruptedException e) {
LOG.error("Fail to sync service spec.", e);
}
}
}
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