/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.yarn.server.resourcemanager;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetSocketAddress;
import java.security.PrivilegedExceptionAction;
import java.util.List;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.ha.HAServiceProtocol;
import org.apache.hadoop.ha.HAServiceProtocol.HAServiceState;
import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
import org.apache.hadoop.metrics2.source.JvmMetrics;
import org.apache.hadoop.security.Groups;
import org.apache.hadoop.security.SecurityUtil;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.authorize.ProxyUsers;
import org.apache.hadoop.service.AbstractService;
import org.apache.hadoop.service.CompositeService;
import org.apache.hadoop.service.Service;
import org.apache.hadoop.util.ExitUtil;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.hadoop.util.ShutdownHookManager;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.yarn.YarnUncaughtExceptionHandler;
import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.NodeId;
import org.apache.hadoop.yarn.conf.ConfigurationProvider;
import org.apache.hadoop.yarn.conf.ConfigurationProviderFactory;
import org.apache.hadoop.yarn.conf.HAUtil;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.event.AsyncDispatcher;
import org.apache.hadoop.yarn.event.Dispatcher;
import org.apache.hadoop.yarn.event.EventHandler;
import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
import org.apache.hadoop.yarn.server.resourcemanager.ahs.RMApplicationHistoryWriter;
import org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncherEventType;
import org.apache.hadoop.yarn.server.resourcemanager.amlauncher.ApplicationMasterLauncher;
import org.apache.hadoop.yarn.server.resourcemanager.monitor.SchedulingEditPolicy;
import org.apache.hadoop.yarn.server.resourcemanager.monitor.SchedulingMonitor;
import org.apache.hadoop.yarn.server.resourcemanager.recovery.NullRMStateStore;
import org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore;
import org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore.RMState;
import org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStoreFactory;
import org.apache.hadoop.yarn.server.resourcemanager.recovery.Recoverable;
import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMApp;
import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppEvent;
import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppEventType;
import org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.AMLivelinessMonitor;
import org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt;
import org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptEvent;
import org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptEventType;
import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.ContainerAllocationExpirer;
import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainer;
import org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode;
import org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNodeEvent;
import org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNodeEventType;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.ContainerPreemptEvent;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.ContainerPreemptEventType;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.PreemptableResourceScheduler;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.QueueMetrics;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.ResourceScheduler;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.event.SchedulerEvent;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.event.SchedulerEventType;
import org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer;
import org.apache.hadoop.yarn.server.resourcemanager.security.QueueACLsManager;
import org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebApp;
import org.apache.hadoop.yarn.server.security.ApplicationACLsManager;
import org.apache.hadoop.yarn.server.webproxy.AppReportFetcher;
import org.apache.hadoop.yarn.server.webproxy.ProxyUriUtils;
import org.apache.hadoop.yarn.server.webproxy.WebAppProxy;
import org.apache.hadoop.yarn.server.webproxy.WebAppProxyServlet;
import org.apache.hadoop.yarn.webapp.WebApp;
import org.apache.hadoop.yarn.webapp.WebApps;
import org.apache.hadoop.yarn.webapp.WebApps.Builder;
import org.apache.hadoop.yarn.webapp.util.WebAppUtils;
import com.google.common.annotations.VisibleForTesting;
/**
* The ResourceManager is the main class that is a set of components.
* "I am the ResourceManager. All your resources belong to us..."
*
*/
@SuppressWarnings("unchecked")
public class ResourceManager extends CompositeService implements Recoverable {
/**
* Priority of the ResourceManager shutdown hook.
*/
public static final int SHUTDOWN_HOOK_PRIORITY = 30;
private static final Log LOG = LogFactory.getLog(ResourceManager.class);
private static long clusterTimeStamp = System.currentTimeMillis();
/**
* "Always On" services. Services that need to run always irrespective of
* the HA state of the RM.
*/
@VisibleForTesting
protected RMContextImpl rmContext;
private Dispatcher rmDispatcher;
@VisibleForTesting
protected AdminService adminService;
/**
* "Active" services. Services that need to run only on the Active RM.
* These services are managed (initialized, started, stopped) by the
* {@link CompositeService} RMActiveServices.
*
* RM is active when (1) HA is disabled, or (2) HA is enabled and the RM is
* in Active state.
*/
protected RMActiveServices activeServices;
protected RMSecretManagerService rmSecretManagerService;
protected ResourceScheduler scheduler;
private ClientRMService clientRM;
protected ApplicationMasterService masterService;
protected NMLivelinessMonitor nmLivelinessMonitor;
protected NodesListManager nodesListManager;
protected RMAppManager rmAppManager;
protected ApplicationACLsManager applicationACLsManager;
protected QueueACLsManager queueACLsManager;
private WebApp webApp;
private AppReportFetcher fetcher = null;
protected ResourceTrackerService resourceTracker;
private String webAppAddress;
private ConfigurationProvider configurationProvider = null;
/** End of Active services */
private Configuration conf;
private UserGroupInformation rmLoginUGI;
public ResourceManager() {
super("ResourceManager");
}
public RMContext getRMContext() {
return this.rmContext;
}
public static long getClusterTimeStamp() {
return clusterTimeStamp;
}
@VisibleForTesting
protected static void setClusterTimeStamp(long timestamp) {
clusterTimeStamp = timestamp;
}
@Override
protected void serviceInit(Configuration conf) throws Exception {
this.conf = conf;
this.rmContext = new RMContextImpl();
this.configurationProvider =
ConfigurationProviderFactory.getConfigurationProvider(conf);
this.configurationProvider.init(this.conf);
rmContext.setConfigurationProvider(configurationProvider);
// load core-site.xml
InputStream coreSiteXMLInputStream =
this.configurationProvider.getConfigurationInputStream(this.conf,
YarnConfiguration.CORE_SITE_CONFIGURATION_FILE);
if (coreSiteXMLInputStream != null) {
this.conf.addResource(coreSiteXMLInputStream);
}
// Do refreshUserToGroupsMappings with loaded core-site.xml
Groups.getUserToGroupsMappingServiceWithLoadedConfiguration(this.conf)
.refresh();
// Do refreshSuperUserGroupsConfiguration with loaded core-site.xml
ProxyUsers.refreshSuperUserGroupsConfiguration(this.conf);
// load yarn-site.xml
InputStream yarnSiteXMLInputStream =
this.configurationProvider.getConfigurationInputStream(this.conf,
YarnConfiguration.YARN_SITE_CONFIGURATION_FILE);
if (yarnSiteXMLInputStream != null) {
this.conf.addResource(yarnSiteXMLInputStream);
}
validateConfigs(this.conf);
// register the handlers for all AlwaysOn services using setupDispatcher().
rmDispatcher = setupDispatcher();
addIfService(rmDispatcher);
rmContext.setDispatcher(rmDispatcher);
adminService = createAdminService();
addService(adminService);
rmContext.setRMAdminService(adminService);
this.rmContext.setHAEnabled(HAUtil.isHAEnabled(this.conf));
if (this.rmContext.isHAEnabled()) {
HAUtil.verifyAndSetConfiguration(this.conf);
}
createAndInitActiveServices();
webAppAddress = WebAppUtils.getRMWebAppURLWithoutScheme(this.conf);
this.rmLoginUGI = UserGroupInformation.getCurrentUser();
super.serviceInit(this.conf);
}
protected QueueACLsManager createQueueACLsManager(ResourceScheduler scheduler,
Configuration conf) {
return new QueueACLsManager(scheduler, conf);
}
@VisibleForTesting
protected void setRMStateStore(RMStateStore rmStore) {
rmStore.setRMDispatcher(rmDispatcher);
rmContext.setStateStore(rmStore);
}
protected EventHandler<SchedulerEvent> createSchedulerEventDispatcher() {
return new SchedulerEventDispatcher(this.scheduler);
}
protected Dispatcher createDispatcher() {
return new AsyncDispatcher();
}
protected ResourceScheduler createScheduler() {
String schedulerClassName = conf.get(YarnConfiguration.RM_SCHEDULER,
YarnConfiguration.DEFAULT_RM_SCHEDULER);
LOG.info("Using Scheduler: " + schedulerClassName);
try {
Class<?> schedulerClazz = Class.forName(schedulerClassName);
if (ResourceScheduler.class.isAssignableFrom(schedulerClazz)) {
return (ResourceScheduler) ReflectionUtils.newInstance(schedulerClazz,
this.conf);
} else {
throw new YarnRuntimeException("Class: " + schedulerClassName
+ " not instance of " + ResourceScheduler.class.getCanonicalName());
}
} catch (ClassNotFoundException e) {
throw new YarnRuntimeException("Could not instantiate Scheduler: "
+ schedulerClassName, e);
}
}
protected ApplicationMasterLauncher createAMLauncher() {
return new ApplicationMasterLauncher(this.rmContext);
}
private NMLivelinessMonitor createNMLivelinessMonitor() {
return new NMLivelinessMonitor(this.rmContext
.getDispatcher());
}
protected AMLivelinessMonitor createAMLivelinessMonitor() {
return new AMLivelinessMonitor(this.rmDispatcher);
}
protected DelegationTokenRenewer createDelegationTokenRenewer() {
return new DelegationTokenRenewer();
}
protected RMAppManager createRMAppManager() {
return new RMAppManager(this.rmContext, this.scheduler, this.masterService,
this.applicationACLsManager, this.conf);
}
protected RMApplicationHistoryWriter createRMApplicationHistoryWriter() {
return new RMApplicationHistoryWriter();
}
// sanity check for configurations
protected static void validateConfigs(Configuration conf) {
// validate max-attempts
int globalMaxAppAttempts =
conf.getInt(YarnConfiguration.RM_AM_MAX_ATTEMPTS,
YarnConfiguration.DEFAULT_RM_AM_MAX_ATTEMPTS);
if (globalMaxAppAttempts <= 0) {
throw new YarnRuntimeException("Invalid global max attempts configuration"
+ ", " + YarnConfiguration.RM_AM_MAX_ATTEMPTS
+ "=" + globalMaxAppAttempts + ", it should be a positive integer.");
}
// validate expireIntvl >= heartbeatIntvl
long expireIntvl = conf.getLong(YarnConfiguration.RM_NM_EXPIRY_INTERVAL_MS,
YarnConfiguration.DEFAULT_RM_NM_EXPIRY_INTERVAL_MS);
long heartbeatIntvl =
conf.getLong(YarnConfiguration.RM_NM_HEARTBEAT_INTERVAL_MS,
YarnConfiguration.DEFAULT_RM_NM_HEARTBEAT_INTERVAL_MS);
if (expireIntvl < heartbeatIntvl) {
throw new YarnRuntimeException("Nodemanager expiry interval should be no"
+ " less than heartbeat interval, "
+ YarnConfiguration.RM_NM_EXPIRY_INTERVAL_MS + "=" + expireIntvl
+ ", " + YarnConfiguration.RM_NM_HEARTBEAT_INTERVAL_MS + "="
+ heartbeatIntvl);
}
}
/**
* RMActiveServices handles all the Active services in the RM.
*/
@Private
class RMActiveServices extends CompositeService {
private DelegationTokenRenewer delegationTokenRenewer;
private EventHandler<SchedulerEvent> schedulerDispatcher;
private ApplicationMasterLauncher applicationMasterLauncher;
private ContainerAllocationExpirer containerAllocationExpirer;
private boolean recoveryEnabled;
RMActiveServices() {
super("RMActiveServices");
}
@Override
protected void serviceInit(Configuration configuration) throws Exception {
conf.setBoolean(Dispatcher.DISPATCHER_EXIT_ON_ERROR_KEY, true);
rmSecretManagerService = createRMSecretManagerService();
addService(rmSecretManagerService);
containerAllocationExpirer = new ContainerAllocationExpirer(rmDispatcher);
addService(containerAllocationExpirer);
rmContext.setContainerAllocationExpirer(containerAllocationExpirer);
AMLivelinessMonitor amLivelinessMonitor = createAMLivelinessMonitor();
addService(amLivelinessMonitor);
rmContext.setAMLivelinessMonitor(amLivelinessMonitor);
AMLivelinessMonitor amFinishingMonitor = createAMLivelinessMonitor();
addService(amFinishingMonitor);
rmContext.setAMFinishingMonitor(amFinishingMonitor);
boolean isRecoveryEnabled = conf.getBoolean(
YarnConfiguration.RECOVERY_ENABLED,
YarnConfiguration.DEFAULT_RM_RECOVERY_ENABLED);
RMStateStore rmStore = null;
if(isRecoveryEnabled) {
recoveryEnabled = true;
rmStore = RMStateStoreFactory.getStore(conf);
} else {
recoveryEnabled = false;
rmStore = new NullRMStateStore();
}
try {
rmStore.init(conf);
rmStore.setRMDispatcher(rmDispatcher);
} catch (Exception e) {
// the Exception from stateStore.init() needs to be handled for
// HA and we need to give up master status if we got fenced
LOG.error("Failed to init state store", e);
throw e;
}
rmContext.setStateStore(rmStore);
if (UserGroupInformation.isSecurityEnabled()) {
delegationTokenRenewer = createDelegationTokenRenewer();
rmContext.setDelegationTokenRenewer(delegationTokenRenewer);
}
RMApplicationHistoryWriter rmApplicationHistoryWriter =
createRMApplicationHistoryWriter();
addService(rmApplicationHistoryWriter);
rmContext.setRMApplicationHistoryWriter(rmApplicationHistoryWriter);
// Register event handler for NodesListManager
nodesListManager = new NodesListManager(rmContext);
rmDispatcher.register(NodesListManagerEventType.class, nodesListManager);
addService(nodesListManager);
rmContext.setNodesListManager(nodesListManager);
// Initialize the scheduler
scheduler = createScheduler();
rmContext.setScheduler(scheduler);
schedulerDispatcher = createSchedulerEventDispatcher();
addIfService(schedulerDispatcher);
rmDispatcher.register(SchedulerEventType.class, schedulerDispatcher);
// Register event handler for RmAppEvents
rmDispatcher.register(RMAppEventType.class,
new ApplicationEventDispatcher(rmContext));
// Register event handler for RmAppAttemptEvents
rmDispatcher.register(RMAppAttemptEventType.class,
new ApplicationAttemptEventDispatcher(rmContext));
// Register event handler for RmNodes
rmDispatcher.register(
RMNodeEventType.class, new NodeEventDispatcher(rmContext));
nmLivelinessMonitor = createNMLivelinessMonitor();
addService(nmLivelinessMonitor);
resourceTracker = createResourceTrackerService();
addService(resourceTracker);
rmContext.setResourceTrackerService(resourceTracker);
DefaultMetricsSystem.initialize("ResourceManager");
JvmMetrics.initSingleton("ResourceManager", null);
try {
scheduler.reinitialize(conf, rmContext);
} catch (IOException ioe) {
throw new RuntimeException("Failed to initialize scheduler", ioe);
}
// creating monitors that handle preemption
createPolicyMonitors();
masterService = createApplicationMasterService();
addService(masterService) ;
rmContext.setApplicationMasterService(masterService);
applicationACLsManager = new ApplicationACLsManager(conf);
queueACLsManager = createQueueACLsManager(scheduler, conf);
rmAppManager = createRMAppManager();
// Register event handler for RMAppManagerEvents
rmDispatcher.register(RMAppManagerEventType.class, rmAppManager);
clientRM = createClientRMService();
rmContext.setClientRMService(clientRM);
addService(clientRM);
rmContext.setClientRMService(clientRM);
applicationMasterLauncher = createAMLauncher();
rmDispatcher.register(AMLauncherEventType.class,
applicationMasterLauncher);
addService(applicationMasterLauncher);
if (UserGroupInformation.isSecurityEnabled()) {
addService(delegationTokenRenewer);
delegationTokenRenewer.setRMContext(rmContext);
}
new RMNMInfo(rmContext, scheduler);
super.serviceInit(conf);
}
@Override
protected void serviceStart() throws Exception {
RMStateStore rmStore = rmContext.getStateStore();
// The state store needs to start irrespective of recoveryEnabled as apps
// need events to move to further states.
rmStore.start();
if(recoveryEnabled) {
try {
rmStore.checkVersion();
RMState state = rmStore.loadState();
recover(state);
} catch (Exception e) {
// the Exception from loadState() needs to be handled for
// HA and we need to give up master status if we got fenced
LOG.error("Failed to load/recover state", e);
throw e;
}
}
super.serviceStart();
}
@Override
protected void serviceStop() throws Exception {
DefaultMetricsSystem.shutdown();
if (rmContext != null) {
RMStateStore store = rmContext.getStateStore();
try {
store.close();
} catch (Exception e) {
LOG.error("Error closing store.", e);
}
}
super.serviceStop();
}
protected void createPolicyMonitors() {
if (scheduler instanceof PreemptableResourceScheduler
&& conf.getBoolean(YarnConfiguration.RM_SCHEDULER_ENABLE_MONITORS,
YarnConfiguration.DEFAULT_RM_SCHEDULER_ENABLE_MONITORS)) {
LOG.info("Loading policy monitors");
List<SchedulingEditPolicy> policies = conf.getInstances(
YarnConfiguration.RM_SCHEDULER_MONITOR_POLICIES,
SchedulingEditPolicy.class);
if (policies.size() > 0) {
rmDispatcher.register(ContainerPreemptEventType.class,
new RMContainerPreemptEventDispatcher(
(PreemptableResourceScheduler) scheduler));
for (SchedulingEditPolicy policy : policies) {
LOG.info("LOADING SchedulingEditPolicy:" + policy.getPolicyName());
policy.init(conf, rmContext.getDispatcher().getEventHandler(),
(PreemptableResourceScheduler) scheduler);
// periodically check whether we need to take action to guarantee
// constraints
SchedulingMonitor mon = new SchedulingMonitor(policy);
addService(mon);
}
} else {
LOG.warn("Policy monitors configured (" +
YarnConfiguration.RM_SCHEDULER_ENABLE_MONITORS +
") but none specified (" +
YarnConfiguration.RM_SCHEDULER_MONITOR_POLICIES + ")");
}
}
}
}
@Private
public static class SchedulerEventDispatcher extends AbstractService
implements EventHandler<SchedulerEvent> {
private final ResourceScheduler scheduler;
private final BlockingQueue<SchedulerEvent> eventQueue =
new LinkedBlockingQueue<SchedulerEvent>();
private final Thread eventProcessor;
private volatile boolean stopped = false;
private boolean shouldExitOnError = false;
public SchedulerEventDispatcher(ResourceScheduler scheduler) {
super(SchedulerEventDispatcher.class.getName());
this.scheduler = scheduler;
this.eventProcessor = new Thread(new EventProcessor());
this.eventProcessor.setName("ResourceManager Event Processor");
}
@Override
protected void serviceInit(Configuration conf) throws Exception {
this.shouldExitOnError =
conf.getBoolean(Dispatcher.DISPATCHER_EXIT_ON_ERROR_KEY,
Dispatcher.DEFAULT_DISPATCHER_EXIT_ON_ERROR);
super.serviceInit(conf);
}
@Override
protected void serviceStart() throws Exception {
this.eventProcessor.start();
super.serviceStart();
}
private final class EventProcessor implements Runnable {
@Override
public void run() {
SchedulerEvent event;
while (!stopped && !Thread.currentThread().isInterrupted()) {
try {
event = eventQueue.take();
} catch (InterruptedException e) {
LOG.error("Returning, interrupted : " + e);
return; // TODO: Kill RM.
}
try {
scheduler.handle(event);
} catch (Throwable t) {
// An error occurred, but we are shutting down anyway.
// If it was an InterruptedException, the very act of
// shutdown could have caused it and is probably harmless.
if (stopped) {
LOG.warn("Exception during shutdown: ", t);
break;
}
LOG.fatal("Error in handling event type " + event.getType()
+ " to the scheduler", t);
if (shouldExitOnError
&& !ShutdownHookManager.get().isShutdownInProgress()) {
LOG.info("Exiting, bbye..");
System.exit(-1);
}
}
}
}
}
@Override
protected void serviceStop() throws Exception {
this.stopped = true;
this.eventProcessor.interrupt();
try {
this.eventProcessor.join();
} catch (InterruptedException e) {
throw new YarnRuntimeException(e);
}
super.serviceStop();
}
@Override
public void handle(SchedulerEvent event) {
try {
int qSize = eventQueue.size();
if (qSize !=0 && qSize %1000 == 0) {
LOG.info("Size of scheduler event-queue is " + qSize);
}
int remCapacity = eventQueue.remainingCapacity();
if (remCapacity < 1000) {
LOG.info("Very low remaining capacity on scheduler event queue: "
+ remCapacity);
}
this.eventQueue.put(event);
} catch (InterruptedException e) {
LOG.info("Interrupted. Trying to exit gracefully.");
}
}
}
@Private
public static class RMFatalEventDispatcher
implements EventHandler<RMFatalEvent> {
private final RMContext rmContext;
private final ResourceManager rm;
public RMFatalEventDispatcher(
RMContext rmContext, ResourceManager resourceManager) {
this.rmContext = rmContext;
this.rm = resourceManager;
}
@Override
public void handle(RMFatalEvent event) {
LOG.fatal("Received a " + RMFatalEvent.class.getName() + " of type " +
event.getType().name() + ". Cause:\n" + event.getCause());
if (event.getType() == RMFatalEventType.STATE_STORE_FENCED) {
LOG.info("RMStateStore has been fenced");
if (rmContext.isHAEnabled()) {
try {
// Transition to standby and reinit active services
LOG.info("Transitioning RM to Standby mode");
rm.transitionToStandby(true);
return;
} catch (Exception e) {
LOG.fatal("Failed to transition RM to Standby mode.");
}
}
}
ExitUtil.terminate(1, event.getCause());
}
}
@Private
public static final class ApplicationEventDispatcher implements
EventHandler<RMAppEvent> {
private final RMContext rmContext;
public ApplicationEventDispatcher(RMContext rmContext) {
this.rmContext = rmContext;
}
@Override
public void handle(RMAppEvent event) {
ApplicationId appID = event.getApplicationId();
RMApp rmApp = this.rmContext.getRMApps().get(appID);
if (rmApp != null) {
try {
rmApp.handle(event);
} catch (Throwable t) {
LOG.error("Error in handling event type " + event.getType()
+ " for application " + appID, t);
}
}
}
}
@Private
public static final class
RMContainerPreemptEventDispatcher
implements EventHandler<ContainerPreemptEvent> {
private final PreemptableResourceScheduler scheduler;
public RMContainerPreemptEventDispatcher(
PreemptableResourceScheduler scheduler) {
this.scheduler = scheduler;
}
@Override
public void handle(ContainerPreemptEvent event) {
ApplicationAttemptId aid = event.getAppId();
RMContainer container = event.getContainer();
switch (event.getType()) {
case DROP_RESERVATION:
scheduler.dropContainerReservation(container);
break;
case PREEMPT_CONTAINER:
scheduler.preemptContainer(aid, container);
break;
case KILL_CONTAINER:
scheduler.killContainer(container);
break;
}
}
}
@Private
public static final class ApplicationAttemptEventDispatcher implements
EventHandler<RMAppAttemptEvent> {
private final RMContext rmContext;
public ApplicationAttemptEventDispatcher(RMContext rmContext) {
this.rmContext = rmContext;
}
@Override
public void handle(RMAppAttemptEvent event) {
ApplicationAttemptId appAttemptID = event.getApplicationAttemptId();
ApplicationId appAttemptId = appAttemptID.getApplicationId();
RMApp rmApp = this.rmContext.getRMApps().get(appAttemptId);
if (rmApp != null) {
RMAppAttempt rmAppAttempt = rmApp.getRMAppAttempt(appAttemptID);
if (rmAppAttempt != null) {
try {
rmAppAttempt.handle(event);
} catch (Throwable t) {
LOG.error("Error in handling event type " + event.getType()
+ " for applicationAttempt " + appAttemptId, t);
}
}
}
}
}
@Private
public static final class NodeEventDispatcher implements
EventHandler<RMNodeEvent> {
private final RMContext rmContext;
public NodeEventDispatcher(RMContext rmContext) {
this.rmContext = rmContext;
}
@Override
public void handle(RMNodeEvent event) {
NodeId nodeId = event.getNodeId();
RMNode node = this.rmContext.getRMNodes().get(nodeId);
if (node != null) {
try {
((EventHandler<RMNodeEvent>) node).handle(event);
} catch (Throwable t) {
LOG.error("Error in handling event type " + event.getType()
+ " for node " + nodeId, t);
}
}
}
}
protected void startWepApp() {
Builder<ApplicationMasterService> builder =
WebApps
.$for("cluster", ApplicationMasterService.class, masterService,
"ws")
.with(conf)
.withHttpSpnegoPrincipalKey(
YarnConfiguration.RM_WEBAPP_SPNEGO_USER_NAME_KEY)
.withHttpSpnegoKeytabKey(
YarnConfiguration.RM_WEBAPP_SPNEGO_KEYTAB_FILE_KEY)
.at(webAppAddress);
String proxyHostAndPort = WebAppUtils.getProxyHostAndPort(conf);
if(WebAppUtils.getResolvedRMWebAppURLWithoutScheme(conf).
equals(proxyHostAndPort)) {
if (HAUtil.isHAEnabled(conf)) {
fetcher = new AppReportFetcher(conf);
} else {
fetcher = new AppReportFetcher(conf, getClientRMService());
}
builder.withServlet(ProxyUriUtils.PROXY_SERVLET_NAME,
ProxyUriUtils.PROXY_PATH_SPEC, WebAppProxyServlet.class);
builder.withAttribute(WebAppProxy.FETCHER_ATTRIBUTE, fetcher);
String[] proxyParts = proxyHostAndPort.split(":");
builder.withAttribute(WebAppProxy.PROXY_HOST_ATTRIBUTE, proxyParts[0]);
}
webApp = builder.start(new RMWebApp(this));
}
/**
* Helper method to create and init {@link #activeServices}. This creates an
* instance of {@link RMActiveServices} and initializes it.
* @throws Exception
*/
void createAndInitActiveServices() throws Exception {
activeServices = new RMActiveServices();
activeServices.init(conf);
}
/**
* Helper method to start {@link #activeServices}.
* @throws Exception
*/
void startActiveServices() throws Exception {
if (activeServices != null) {
clusterTimeStamp = System.currentTimeMillis();
activeServices.start();
}
}
/**
* Helper method to stop {@link #activeServices}.
* @throws Exception
*/
void stopActiveServices() throws Exception {
if (activeServices != null) {
activeServices.stop();
activeServices = null;
rmContext.getRMNodes().clear();
rmContext.getInactiveRMNodes().clear();
rmContext.getRMApps().clear();
ClusterMetrics.destroy();
QueueMetrics.clearQueueMetrics();
}
}
@VisibleForTesting
protected boolean areActiveServicesRunning() {
return activeServices != null && activeServices.isInState(STATE.STARTED);
}
synchronized void transitionToActive() throws Exception {
if (rmContext.getHAServiceState() ==
HAServiceProtocol.HAServiceState.ACTIVE) {
LOG.info("Already in active state");
return;
}
LOG.info("Transitioning to active state");
// use rmLoginUGI to startActiveServices.
// in non-secure model, rmLoginUGI will be current UGI
// in secure model, rmLoginUGI will be LoginUser UGI
this.rmLoginUGI.doAs(new PrivilegedExceptionAction<Void>() {
@Override
public Void run() throws Exception {
startActiveServices();
return null;
}
});
rmContext.setHAServiceState(HAServiceProtocol.HAServiceState.ACTIVE);
LOG.info("Transitioned to active state");
}
synchronized void transitionToStandby(boolean initialize)
throws Exception {
if (rmContext.getHAServiceState() ==
HAServiceProtocol.HAServiceState.STANDBY) {
LOG.info("Already in standby state");
return;
}
LOG.info("Transitioning to standby state");
if (rmContext.getHAServiceState() ==
HAServiceProtocol.HAServiceState.ACTIVE) {
stopActiveServices();
if (initialize) {
resetDispatcher();
createAndInitActiveServices();
}
}
rmContext.setHAServiceState(HAServiceProtocol.HAServiceState.STANDBY);
LOG.info("Transitioned to standby state");
}
@Override
protected void serviceStart() throws Exception {
try {
doSecureLogin();
} catch(IOException ie) {
throw new YarnRuntimeException("Failed to login", ie);
}
if (this.rmContext.isHAEnabled()) {
transitionToStandby(true);
} else {
transitionToActive();
}
startWepApp();
if (getConfig().getBoolean(YarnConfiguration.IS_MINI_YARN_CLUSTER, false)) {
int port = webApp.port();
WebAppUtils.setRMWebAppPort(conf, port);
}
super.serviceStart();
}
protected void doSecureLogin() throws IOException {
InetSocketAddress socAddr = getBindAddress(conf);
SecurityUtil.login(this.conf, YarnConfiguration.RM_KEYTAB,
YarnConfiguration.RM_PRINCIPAL, socAddr.getHostName());
// if security is enable, set rmLoginUGI as UGI of loginUser
if (UserGroupInformation.isSecurityEnabled()) {
this.rmLoginUGI = UserGroupInformation.getLoginUser();
}
}
@Override
protected void serviceStop() throws Exception {
if (webApp != null) {
webApp.stop();
}
if (fetcher != null) {
fetcher.stop();
}
if (configurationProvider != null) {
configurationProvider.close();
}
super.serviceStop();
transitionToStandby(false);
rmContext.setHAServiceState(HAServiceState.STOPPING);
}
protected ResourceTrackerService createResourceTrackerService() {
return new ResourceTrackerService(this.rmContext, this.nodesListManager,
this.nmLivelinessMonitor,
this.rmContext.getContainerTokenSecretManager(),
this.rmContext.getNMTokenSecretManager());
}
protected ClientRMService createClientRMService() {
return new ClientRMService(this.rmContext, scheduler, this.rmAppManager,
this.applicationACLsManager, this.queueACLsManager,
this.rmContext.getRMDelegationTokenSecretManager());
}
protected ApplicationMasterService createApplicationMasterService() {
return new ApplicationMasterService(this.rmContext, scheduler);
}
protected AdminService createAdminService() {
return new AdminService(this, rmContext);
}
protected RMSecretManagerService createRMSecretManagerService() {
return new RMSecretManagerService(conf, rmContext);
}
@Private
public ClientRMService getClientRMService() {
return this.clientRM;
}
/**
* return the scheduler.
* @return the scheduler for the Resource Manager.
*/
@Private
public ResourceScheduler getResourceScheduler() {
return this.scheduler;
}
/**
* return the resource tracking component.
* @return the resource tracking component.
*/
@Private
public ResourceTrackerService getResourceTrackerService() {
return this.resourceTracker;
}
@Private
public ApplicationMasterService getApplicationMasterService() {
return this.masterService;
}
@Private
public ApplicationACLsManager getApplicationACLsManager() {
return this.applicationACLsManager;
}
@Private
public QueueACLsManager getQueueACLsManager() {
return this.queueACLsManager;
}
@Private
WebApp getWebapp() {
return this.webApp;
}
@Override
public void recover(RMState state) throws Exception {
// recover RMdelegationTokenSecretManager
rmContext.getRMDelegationTokenSecretManager().recover(state);
// recover applications
rmAppManager.recover(state);
}
public static void main(String argv[]) {
Thread.setDefaultUncaughtExceptionHandler(new YarnUncaughtExceptionHandler());
StringUtils.startupShutdownMessage(ResourceManager.class, argv, LOG);
try {
Configuration conf = new YarnConfiguration();
ResourceManager resourceManager = new ResourceManager();
ShutdownHookManager.get().addShutdownHook(
new CompositeServiceShutdownHook(resourceManager),
SHUTDOWN_HOOK_PRIORITY);
resourceManager.init(conf);
resourceManager.start();
} catch (Throwable t) {
LOG.fatal("Error starting ResourceManager", t);
System.exit(-1);
}
}
/**
* Register the handlers for alwaysOn services
*/
private Dispatcher setupDispatcher() {
Dispatcher dispatcher = createDispatcher();
dispatcher.register(RMFatalEventType.class,
new ResourceManager.RMFatalEventDispatcher(this.rmContext, this));
return dispatcher;
}
private void resetDispatcher() {
Dispatcher dispatcher = setupDispatcher();
((Service)dispatcher).init(this.conf);
((Service)dispatcher).start();
removeService((Service)rmDispatcher);
rmDispatcher = dispatcher;
addIfService(rmDispatcher);
rmContext.setDispatcher(rmDispatcher);
}
/**
* Retrieve RM bind address from configuration
*
* @param conf
* @return InetSocketAddress
*/
public static InetSocketAddress getBindAddress(Configuration conf) {
return conf.getSocketAddr(YarnConfiguration.RM_ADDRESS,
YarnConfiguration.DEFAULT_RM_ADDRESS, YarnConfiguration.DEFAULT_RM_PORT);
}
}