/**
* 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.containermanager.localizer;
import java.io.DataOutputStream;
import java.io.File;
import java.net.URISyntaxException;
import java.util.Collection;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.CancellationException;
import java.util.concurrent.CompletionService;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorCompletionService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.security.Credentials;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.security.token.TokenIdentifier;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.ContainerId;
import org.apache.hadoop.yarn.api.records.LocalResource;
import org.apache.hadoop.yarn.api.records.LocalResourceVisibility;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import static org.apache.hadoop.fs.CreateFlag.CREATE;
import static org.apache.hadoop.fs.CreateFlag.OVERWRITE;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.apache.hadoop.ipc.Server;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
import org.apache.hadoop.fs.FileContext;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.yarn.YarnException;
import org.apache.hadoop.yarn.event.Dispatcher;
import org.apache.hadoop.yarn.event.EventHandler;
import org.apache.hadoop.yarn.factories.RecordFactory;
import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
import org.apache.hadoop.yarn.ipc.YarnRPC;
import org.apache.hadoop.yarn.server.nodemanager.ContainerExecutor;
import org.apache.hadoop.yarn.server.nodemanager.DeletionService;
import org.apache.hadoop.yarn.server.nodemanager.LocalDirsHandlerService;
import org.apache.hadoop.yarn.server.nodemanager.api.LocalizationProtocol;
import org.apache.hadoop.yarn.server.nodemanager.api.protocolrecords.LocalResourceStatus;
import org.apache.hadoop.yarn.server.nodemanager.api.protocolrecords.LocalizerAction;
import org.apache.hadoop.yarn.server.nodemanager.api.protocolrecords.LocalizerHeartbeatResponse;
import org.apache.hadoop.yarn.server.nodemanager.api.protocolrecords.LocalizerStatus;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.application.Application;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.application.ApplicationEvent;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.application.ApplicationEventType;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.application.ApplicationInitedEvent;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.ContainerEvent;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.ContainerEventType;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.ContainerResourceFailedEvent;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.event.ApplicationLocalizationEvent;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.event.ContainerLocalizationCleanupEvent;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.event.LocalizationEvent;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.event.ContainerLocalizationRequestEvent;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.event.LocalizationEventType;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.event.LocalizerEvent;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.event.LocalizerEventType;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.event.LocalizerResourceRequestEvent;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.event.ResourceLocalizedEvent;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.event.ResourceReleaseEvent;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.event.ResourceRequestEvent;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.security.LocalizerTokenSecretManager;
import org.apache.hadoop.yarn.server.nodemanager.security.authorize.NMPolicyProvider;
import org.apache.hadoop.yarn.service.AbstractService;
import org.apache.hadoop.yarn.service.CompositeService;
import org.apache.hadoop.yarn.util.ConverterUtils;
import org.apache.hadoop.yarn.util.FSDownload;
import com.google.common.util.concurrent.ThreadFactoryBuilder;
////before containermanager,this service must be started.
////eg.create dir on local filesystem.
public class ResourceLocalizationService extends CompositeService
implements EventHandler<LocalizationEvent>, LocalizationProtocol {
private static final Log LOG = LogFactory.getLog(ResourceLocalizationService.class);
public static final String NM_PRIVATE_DIR = "nmPrivate";
public static final FsPermission NM_PRIVATE_PERM = new FsPermission((short) 0700);
private Server server;
private InetSocketAddress localizationServerAddress;
private long cacheTargetSize;
private long cacheCleanupPeriod;
private final ContainerExecutor exec;
protected final Dispatcher dispatcher;
private final DeletionService delService;
private LocalizerTracker localizerTracker;
private RecordFactory recordFactory;
private final ScheduledExecutorService cacheCleanup;
private final LocalResourcesTracker publicRsrc;
private LocalDirsHandlerService dirsHandler;
/**
* Map of LocalResourceTrackers keyed by username, for private
* resources.
*/
private final ConcurrentMap<String,LocalResourcesTracker> privateRsrc =
new ConcurrentHashMap<String,LocalResourcesTracker>();
/**
* Map of LocalResourceTrackers keyed by appid, for application
* resources.
*/
private final ConcurrentMap<String,LocalResourcesTracker> appRsrc =
new ConcurrentHashMap<String,LocalResourcesTracker>();
public ResourceLocalizationService(Dispatcher dispatcher,
ContainerExecutor exec, DeletionService delService,
LocalDirsHandlerService dirsHandler) {
super(ResourceLocalizationService.class.getName());
this.exec = exec;
this.dispatcher = dispatcher;
this.delService = delService;
this.dirsHandler = dirsHandler;
this.publicRsrc = new LocalResourcesTrackerImpl(null, dispatcher);
this.cacheCleanup = new ScheduledThreadPoolExecutor(1,
new ThreadFactoryBuilder()
.setNameFormat("ResourceLocalizationService Cache Cleanup")
.build());
}
FileContext getLocalFileContext(Configuration conf) {
try {
return FileContext.getLocalFSFileContext(conf);
} catch (IOException e) {
throw new YarnException("Failed to access local fs");
}
}
@Override
public void init(Configuration conf) {
this.recordFactory = RecordFactoryProvider.getRecordFactory(conf);
try {
// TODO queue deletions here, rather than NM init?
FileContext lfs = getLocalFileContext(conf);
List<String> localDirs = dirsHandler.getLocalDirs();
for (String localDir : localDirs) {
// $local/usercache
Path userDir = new Path(localDir, ContainerLocalizer.USERCACHE);
lfs.mkdir(userDir, null, true);
// $local/filecache
Path fileDir = new Path(localDir, ContainerLocalizer.FILECACHE);
lfs.mkdir(fileDir, null, true);
// $local/nmPrivate
Path sysDir = new Path(localDir, NM_PRIVATE_DIR);
lfs.mkdir(sysDir, NM_PRIVATE_PERM, true);
}
List<String> logDirs = dirsHandler.getLogDirs();
for (String logDir : logDirs) {
lfs.mkdir(new Path(logDir), null, true);
}
} catch (IOException e) {
throw new YarnException("Failed to initialize LocalizationService", e);
}
cacheTargetSize =
conf.getLong(YarnConfiguration.NM_LOCALIZER_CACHE_TARGET_SIZE_MB, YarnConfiguration.DEFAULT_NM_LOCALIZER_CACHE_TARGET_SIZE_MB) << 20;
cacheCleanupPeriod =
conf.getLong(YarnConfiguration.NM_LOCALIZER_CACHE_CLEANUP_INTERVAL_MS, YarnConfiguration.DEFAULT_NM_LOCALIZER_CACHE_CLEANUP_INTERVAL_MS);
localizationServerAddress = conf.getSocketAddr(
YarnConfiguration.NM_LOCALIZER_ADDRESS,
YarnConfiguration.DEFAULT_NM_LOCALIZER_ADDRESS,
YarnConfiguration.DEFAULT_NM_LOCALIZER_PORT);
localizerTracker = createLocalizerTracker(conf);
addService(localizerTracker);
dispatcher.register(LocalizerEventType.class, localizerTracker);
super.init(conf);
}
@Override
public LocalizerHeartbeatResponse heartbeat(LocalizerStatus status) {
return localizerTracker.processHeartbeat(status);
}
@Override
public void start() {
cacheCleanup.scheduleWithFixedDelay(new CacheCleanup(dispatcher),
cacheCleanupPeriod, cacheCleanupPeriod, TimeUnit.MILLISECONDS);
server = createServer();
server.start();
localizationServerAddress =
getConfig().updateConnectAddr(YarnConfiguration.NM_LOCALIZER_ADDRESS,
server.getListenerAddress());
LOG.info("Localizer started on port " + server.getPort());
super.start();
}
LocalizerTracker createLocalizerTracker(Configuration conf) {
return new LocalizerTracker(conf);
}
Server createServer() {
Configuration conf = getConfig();
YarnRPC rpc = YarnRPC.create(conf);
LocalizerTokenSecretManager secretManager = null;
if (UserGroupInformation.isSecurityEnabled()) {
secretManager = new LocalizerTokenSecretManager();
}
Server server = rpc.getServer(LocalizationProtocol.class, this,
localizationServerAddress, conf, secretManager,
conf.getInt(YarnConfiguration.NM_LOCALIZER_CLIENT_THREAD_COUNT,
YarnConfiguration.DEFAULT_NM_LOCALIZER_CLIENT_THREAD_COUNT));
// Enable service authorization?
if (conf.getBoolean(
CommonConfigurationKeysPublic.HADOOP_SECURITY_AUTHORIZATION,
false)) {
server.refreshServiceAcl(conf, new NMPolicyProvider());
}
return server;
}
@Override
public void stop() {
if (server != null) {
server.stop();
}
cacheCleanup.shutdown();
super.stop();
}
@Override
public void handle(LocalizationEvent event) {
// TODO: create log dir as $logdir/$user/$appId
switch (event.getType()) {
case INIT_APPLICATION_RESOURCES:
handleInitApplicationResources(
((ApplicationLocalizationEvent)event).getApplication());
break;
case INIT_CONTAINER_RESOURCES:
handleInitContainerResources((ContainerLocalizationRequestEvent) event);
break;
case CACHE_CLEANUP:
handleCacheCleanup(event);
break;
case CLEANUP_CONTAINER_RESOURCES:
handleCleanupContainerResources((ContainerLocalizationCleanupEvent)event);
break;
case DESTROY_APPLICATION_RESOURCES:
handleDestroyApplicationResources(
((ApplicationLocalizationEvent)event).getApplication());
break;
default:
throw new YarnException("Unknown localization event: " + event);
}
}
/**
* Handle event received the first time any container is scheduled
* by a given application.
*/
@SuppressWarnings("unchecked")
private void handleInitApplicationResources(Application app) {
// 0) Create application tracking structs
String userName = app.getUser();
privateRsrc.putIfAbsent(userName,
new LocalResourcesTrackerImpl(userName, dispatcher));
if (null != appRsrc.putIfAbsent(ConverterUtils.toString(app.getAppId()),
new LocalResourcesTrackerImpl(app.getUser(), dispatcher))) {
LOG.warn("Initializing application " + app + " already present");
assert false; // TODO: FIXME assert doesn't help
// ^ The condition is benign. Tests should fail and it
// should appear in logs, but it's an internal error
// that should have no effect on applications
}
// 1) Signal container init
//
// This is handled by the ApplicationImpl state machine and allows
// containers to proceed with launching.
dispatcher.getEventHandler().handle(new ApplicationInitedEvent(
app.getAppId()));
}
/**
* For each of the requested resources for a container, determines the
* appropriate {@link LocalResourcesTracker} and forwards a
* {@link LocalResourceRequest} to that tracker.
*/
private void handleInitContainerResources(
ContainerLocalizationRequestEvent rsrcReqs) {
Container c = rsrcReqs.getContainer();
LocalizerContext ctxt = new LocalizerContext(
c.getUser(), c.getContainerID(), c.getCredentials());
Map<LocalResourceVisibility, Collection<LocalResourceRequest>> rsrcs =
rsrcReqs.getRequestedResources();
for (Map.Entry<LocalResourceVisibility, Collection<LocalResourceRequest>> e :
rsrcs.entrySet()) {
LocalResourcesTracker tracker = getLocalResourcesTracker(e.getKey(), c.getUser(),
c.getContainerID().getApplicationAttemptId().getApplicationId());
for (LocalResourceRequest req : e.getValue()) {
tracker.handle(new ResourceRequestEvent(req, e.getKey(), ctxt));
}
}
}
private void handleCacheCleanup(LocalizationEvent event) {
ResourceRetentionSet retain =
new ResourceRetentionSet(delService, cacheTargetSize);
retain.addResources(publicRsrc);
LOG.debug("Resource cleanup (public) " + retain);
for (LocalResourcesTracker t : privateRsrc.values()) {
retain.addResources(t);
LOG.debug("Resource cleanup " + t.getUser() + ":" + retain);
}
//TODO Check if appRsrcs should also be added to the retention set.
}
@SuppressWarnings("unchecked")
private void handleCleanupContainerResources(
ContainerLocalizationCleanupEvent rsrcCleanup) {
Container c = rsrcCleanup.getContainer();
Map<LocalResourceVisibility, Collection<LocalResourceRequest>> rsrcs =
rsrcCleanup.getResources();
for (Map.Entry<LocalResourceVisibility, Collection<LocalResourceRequest>> e :
rsrcs.entrySet()) {
LocalResourcesTracker tracker = getLocalResourcesTracker(e.getKey(), c.getUser(),
c.getContainerID().getApplicationAttemptId().getApplicationId());
for (LocalResourceRequest req : e.getValue()) {
tracker.handle(new ResourceReleaseEvent(req, c.getContainerID()));
}
}
// Delete the container directories
String userName = c.getUser();
String containerIDStr = c.toString();
String appIDStr = ConverterUtils.toString(
c.getContainerID().getApplicationAttemptId().getApplicationId());
for (String localDir : dirsHandler.getLocalDirs()) {
// Delete the user-owned container-dir
Path usersdir = new Path(localDir, ContainerLocalizer.USERCACHE);
Path userdir = new Path(usersdir, userName);
Path allAppsdir = new Path(userdir, ContainerLocalizer.APPCACHE);
Path appDir = new Path(allAppsdir, appIDStr);
Path containerDir = new Path(appDir, containerIDStr);
delService.delete(userName, containerDir, new Path[] {});
// Delete the nmPrivate container-dir
Path sysDir = new Path(localDir, NM_PRIVATE_DIR);
Path appSysDir = new Path(sysDir, appIDStr);
Path containerSysDir = new Path(appSysDir, containerIDStr);
delService.delete(null, containerSysDir, new Path[] {});
}
dispatcher.getEventHandler().handle(new ContainerEvent(c.getContainerID(),
ContainerEventType.CONTAINER_RESOURCES_CLEANEDUP));
}
@SuppressWarnings({"unchecked"})
private void handleDestroyApplicationResources(Application application) {
String userName;
String appIDStr;
LocalResourcesTracker appLocalRsrcsTracker =
appRsrc.remove(ConverterUtils.toString(application.getAppId()));
if (null == appLocalRsrcsTracker) {
LOG.warn("Removing uninitialized application " + application);
}
// TODO: What to do with appLocalRsrcsTracker?
// Delete the application directories
userName = application.getUser();
appIDStr = application.toString();
for (String localDir : dirsHandler.getLocalDirs()) {
// Delete the user-owned app-dir
Path usersdir = new Path(localDir, ContainerLocalizer.USERCACHE);
Path userdir = new Path(usersdir, userName);
Path allAppsdir = new Path(userdir, ContainerLocalizer.APPCACHE);
Path appDir = new Path(allAppsdir, appIDStr);
delService.delete(userName, appDir, new Path[] {});
// Delete the nmPrivate app-dir
Path sysDir = new Path(localDir, NM_PRIVATE_DIR);
Path appSysDir = new Path(sysDir, appIDStr);
delService.delete(null, appSysDir, new Path[] {});
}
// TODO: decrement reference counts of all resources associated with this
// app
dispatcher.getEventHandler().handle(new ApplicationEvent(
application.getAppId(),
ApplicationEventType.APPLICATION_RESOURCES_CLEANEDUP));
}
LocalResourcesTracker getLocalResourcesTracker(
LocalResourceVisibility visibility, String user, ApplicationId appId) {
switch (visibility) {
default:
case PUBLIC:
return publicRsrc;
case PRIVATE:
return privateRsrc.get(user);
case APPLICATION:
return appRsrc.get(ConverterUtils.toString(appId));
}
}
/**
* Sub-component handling the spawning of {@link ContainerLocalizer}s
*/
class LocalizerTracker extends AbstractService implements EventHandler<LocalizerEvent> {
private final PublicLocalizer publicLocalizer;
private final Map<String,LocalizerRunner> privLocalizers;
LocalizerTracker(Configuration conf) {
this(conf, new HashMap<String,LocalizerRunner>());
}
LocalizerTracker(Configuration conf,
Map<String,LocalizerRunner> privLocalizers) {
super(LocalizerTracker.class.getName());
this.publicLocalizer = new PublicLocalizer(conf);
this.privLocalizers = privLocalizers;
}
@Override
public synchronized void start() {
publicLocalizer.start();
super.start();
}
public LocalizerHeartbeatResponse processHeartbeat(LocalizerStatus status) {
String locId = status.getLocalizerId();
synchronized (privLocalizers) {
LocalizerRunner localizer = privLocalizers.get(locId);
if (null == localizer) {
// TODO process resources anyway
LOG.info("Unknown localizer with localizerId " + locId
+ " is sending heartbeat. Ordering it to DIE");
LocalizerHeartbeatResponse response =
recordFactory.newRecordInstance(LocalizerHeartbeatResponse.class);
response.setLocalizerAction(LocalizerAction.DIE);
return response;
}
return localizer.update(status.getResources());
}
}
@Override
public void stop() {
for (LocalizerRunner localizer : privLocalizers.values()) {
localizer.interrupt();
}
publicLocalizer.interrupt();
super.stop();
}
@Override
public void handle(LocalizerEvent event) {
String locId = event.getLocalizerId();
switch (event.getType()) {
case REQUEST_RESOURCE_LOCALIZATION:
// 0) find running localizer or start new thread
LocalizerResourceRequestEvent req =
(LocalizerResourceRequestEvent)event;
switch (req.getVisibility()) {
case PUBLIC:
publicLocalizer.addResource(req);
break;
case PRIVATE:
case APPLICATION:
synchronized (privLocalizers) {
LocalizerRunner localizer = privLocalizers.get(locId);
if (null == localizer) {
LOG.info("Created localizer for " + req.getLocalizerId());
localizer = new LocalizerRunner(req.getContext(),
req.getLocalizerId());
privLocalizers.put(locId, localizer);
localizer.start();
}
// 1) propagate event
localizer.addResource(req);
}
break;
}
break;
case ABORT_LOCALIZATION:
// 0) find running localizer, interrupt and remove
synchronized (privLocalizers) {
LocalizerRunner localizer = privLocalizers.get(locId);
if (null == localizer) {
return; // ignore; already gone
}
privLocalizers.remove(locId);
localizer.interrupt();
}
break;
}
}
}
private static ExecutorService createLocalizerExecutor(Configuration conf) {
int nThreads = conf.getInt(
YarnConfiguration.NM_LOCALIZER_FETCH_THREAD_COUNT,
YarnConfiguration.DEFAULT_NM_LOCALIZER_FETCH_THREAD_COUNT);
ThreadFactory tf = new ThreadFactoryBuilder()
.setNameFormat("PublicLocalizer #%d")
.build();
return Executors.newFixedThreadPool(nThreads, tf);
}
class PublicLocalizer extends Thread {
final FileContext lfs;
final Configuration conf;
final ExecutorService threadPool;
final CompletionService<Path> queue;
final Map<Future<Path>,LocalizerResourceRequestEvent> pending;
// TODO hack to work around broken signaling
final Map<LocalResourceRequest,List<LocalizerResourceRequestEvent>> attempts;
PublicLocalizer(Configuration conf) {
this(conf, getLocalFileContext(conf),
createLocalizerExecutor(conf),
new HashMap<Future<Path>,LocalizerResourceRequestEvent>(),
new HashMap<LocalResourceRequest,List<LocalizerResourceRequestEvent>>());
}
PublicLocalizer(Configuration conf, FileContext lfs,
ExecutorService threadPool,
Map<Future<Path>,LocalizerResourceRequestEvent> pending,
Map<LocalResourceRequest,List<LocalizerResourceRequestEvent>> attempts) {
super("Public Localizer");
this.lfs = lfs;
this.conf = conf;
this.pending = pending;
this.attempts = attempts;
// List<String> localDirs = dirsHandler.getLocalDirs();
// String[] publicFilecache = new String[localDirs.size()];
// for (int i = 0, n = localDirs.size(); i < n; ++i) {
// publicFilecache[i] =
// new Path(localDirs.get(i), ContainerLocalizer.FILECACHE).toString();
// }
// conf.setStrings(PUBCACHE_CTXT, publicFilecache);
// this.publicDirDestPath = new LocalDirAllocator(PUBCACHE_CTXT).getLocalPathForWrite(pathStr, conf);
// List<String> localDirs = dirsHandler.getLocalDirs();
// String[] publicFilecache = new String[localDirs.size()];
// int i = 0;
// for (String localDir : localDirs) {
// publicFilecache[i++] =
// new Path(localDir, ContainerLocalizer.FILECACHE).toString();
// }
this.threadPool = threadPool;
this.queue = new ExecutorCompletionService<Path>(threadPool);
}
public void addResource(LocalizerResourceRequestEvent request) {
// TODO handle failures, cancellation, requests by other containers
LocalResourceRequest key = request.getResource().getRequest();
LOG.info("Downloading public rsrc:" + key);
synchronized (attempts) {
List<LocalizerResourceRequestEvent> sigh = attempts.get(key);
if (null == sigh) {
LocalResource resource = request.getResource().getRequest();
try {
Path publicDirDestPath = dirsHandler.getLocalPathForWrite(
"." + Path.SEPARATOR + ContainerLocalizer.FILECACHE,
ContainerLocalizer.getEstimatedSize(resource), true);
pending.put(queue.submit(new FSDownload(
lfs, null, conf, publicDirDestPath, resource, new Random())),
request);
attempts.put(key, new LinkedList<LocalizerResourceRequestEvent>());
} catch (IOException e) {
LOG.error("Local path for public localization is not found. "
+ " May be disks failed.", e);
}
} else {
sigh.add(request);
}
}
}
@Override
@SuppressWarnings("unchecked") // dispatcher not typed
public void run() {
try {
// TODO shutdown, better error handling esp. DU
while (!Thread.currentThread().isInterrupted()) {
try {
Future<Path> completed = queue.take();
LocalizerResourceRequestEvent assoc = pending.remove(completed);
try {
Path local = completed.get();
if (null == assoc) {
LOG.error("Localized unkonwn resource to " + completed);
// TODO delete
return;
}
LocalResourceRequest key = assoc.getResource().getRequest();
assoc.getResource().handle(
new ResourceLocalizedEvent(key,
local, FileUtil.getDU(new File(local.toUri()))));
synchronized (attempts) {
attempts.remove(key);
}
} catch (ExecutionException e) {
LOG.info("Failed to download rsrc " + assoc.getResource(),
e.getCause());
dispatcher.getEventHandler().handle(
new ContainerResourceFailedEvent(
assoc.getContext().getContainerId(),
assoc.getResource().getRequest(), e.getCause()));
synchronized (attempts) {
LocalResourceRequest req = assoc.getResource().getRequest();
List<LocalizerResourceRequestEvent> reqs = attempts.get(req);
if (null == reqs) {
LOG.error("Missing pending list for " + req);
return;
}
if (reqs.isEmpty()) {
attempts.remove(req);
}
/*
* Do not retry for now. Once failed is failed!
* LocalizerResourceRequestEvent request = reqs.remove(0);
pending.put(queue.submit(new FSDownload(
lfs, null, conf, publicDirs,
request.getResource().getRequest(), new Random())),
request);
*/ }
} catch (CancellationException e) {
// ignore; shutting down
}
} catch (InterruptedException e) {
return;
}
}
} catch(Throwable t) {
LOG.fatal("Error: Shutting down", t);
} finally {
LOG.info("Public cache exiting");
threadPool.shutdownNow();
}
}
}
/**
* Runs the {@link ContainerLocalizer} itself in a separate process with
* access to user's credentials. One {@link LocalizerRunner} per localizerId.
*
*/
class LocalizerRunner extends Thread {
final LocalizerContext context;
final String localizerId;
final Map<LocalResourceRequest,LocalizerResourceRequestEvent> scheduled;
final List<LocalizerResourceRequestEvent> pending;
// TODO: threadsafe, use outer?
private final RecordFactory recordFactory =
RecordFactoryProvider.getRecordFactory(getConfig());
LocalizerRunner(LocalizerContext context, String localizerId) {
super("LocalizerRunner for " + localizerId);
this.context = context;
this.localizerId = localizerId;
this.pending = new ArrayList<LocalizerResourceRequestEvent>();
this.scheduled =
new HashMap<LocalResourceRequest, LocalizerResourceRequestEvent>();
}
public void addResource(LocalizerResourceRequestEvent request) {
// TDOO: Synchronization
pending.add(request);
}
/**
* Find next resource to be given to a spawned localizer.
*
* @return
*/
private LocalResource findNextResource() {
// TODO: Synchronization
for (Iterator<LocalizerResourceRequestEvent> i = pending.iterator();
i.hasNext();) {
LocalizerResourceRequestEvent evt = i.next();
LocalizedResource nRsrc = evt.getResource();
if (ResourceState.LOCALIZED.equals(nRsrc.getState())) {
i.remove();
continue;
}
if (nRsrc.tryAcquire()) {
LocalResourceRequest nextRsrc = nRsrc.getRequest();
LocalResource next =
recordFactory.newRecordInstance(LocalResource.class);
next.setResource(
ConverterUtils.getYarnUrlFromPath(nextRsrc.getPath()));
next.setTimestamp(nextRsrc.getTimestamp());
next.setType(nextRsrc.getType());
next.setVisibility(evt.getVisibility());
scheduled.put(nextRsrc, evt);
return next;
}
}
return null;
}
// TODO this sucks. Fix it later
@SuppressWarnings("unchecked") // dispatcher not typed
LocalizerHeartbeatResponse update(
List<LocalResourceStatus> remoteResourceStatuses) {
LocalizerHeartbeatResponse response =
recordFactory.newRecordInstance(LocalizerHeartbeatResponse.class);
// The localizer has just spawned. Start giving it resources for
// remote-fetching.
if (remoteResourceStatuses.isEmpty()) {
LocalResource next = findNextResource();
if (next != null) {
response.setLocalizerAction(LocalizerAction.LIVE);
response.addResource(next);
} else if (pending.isEmpty()) {
// TODO: Synchronization
response.setLocalizerAction(LocalizerAction.DIE);
} else {
response.setLocalizerAction(LocalizerAction.LIVE);
}
return response;
}
for (LocalResourceStatus stat : remoteResourceStatuses) {
LocalResource rsrc = stat.getResource();
LocalResourceRequest req = null;
try {
req = new LocalResourceRequest(rsrc);
} catch (URISyntaxException e) {
// TODO fail? Already translated several times...
}
LocalizerResourceRequestEvent assoc = scheduled.get(req);
if (assoc == null) {
// internal error
LOG.error("Unknown resource reported: " + req);
continue;
}
switch (stat.getStatus()) {
case FETCH_SUCCESS:
// notify resource
try {
assoc.getResource().handle(
new ResourceLocalizedEvent(req,
ConverterUtils.getPathFromYarnURL(stat.getLocalPath()),
stat.getLocalSize()));
} catch (URISyntaxException e) { }
if (pending.isEmpty()) {
// TODO: Synchronization
response.setLocalizerAction(LocalizerAction.DIE);
break;
}
response.setLocalizerAction(LocalizerAction.LIVE);
LocalResource next = findNextResource();
if (next != null) {
response.addResource(next);
}
break;
case FETCH_PENDING:
response.setLocalizerAction(LocalizerAction.LIVE);
break;
case FETCH_FAILURE:
LOG.info("DEBUG: FAILED " + req, stat.getException());
assoc.getResource().unlock();
response.setLocalizerAction(LocalizerAction.DIE);
// TODO: Why is this event going directly to the container. Why not
// the resource itself? What happens to the resource? Is it removed?
dispatcher.getEventHandler().handle(
new ContainerResourceFailedEvent(context.getContainerId(),
req, stat.getException()));
break;
default:
LOG.info("Unknown status: " + stat.getStatus());
response.setLocalizerAction(LocalizerAction.DIE);
dispatcher.getEventHandler().handle(
new ContainerResourceFailedEvent(context.getContainerId(),
req, stat.getException()));
break;
}
}
return response;
}
@Override
@SuppressWarnings("unchecked") // dispatcher not typed
public void run() {
Path nmPrivateCTokensPath = null;
try {
// Get nmPrivateDir
nmPrivateCTokensPath =
dirsHandler.getLocalPathForWrite(
NM_PRIVATE_DIR + Path.SEPARATOR
+ String.format(ContainerLocalizer.TOKEN_FILE_NAME_FMT,
localizerId));
// 0) init queue, etc.
// 1) write credentials to private dir
writeCredentials(nmPrivateCTokensPath);
// 2) exec initApplication and wait
List<String> localDirs = dirsHandler.getLocalDirs();
List<String> logDirs = dirsHandler.getLogDirs();
if (dirsHandler.areDisksHealthy()) {
exec.startLocalizer(nmPrivateCTokensPath, localizationServerAddress,
context.getUser(),
ConverterUtils.toString(
context.getContainerId().
getApplicationAttemptId().getApplicationId()),
localizerId, localDirs, logDirs);
} else {
throw new IOException("All disks failed. "
+ dirsHandler.getDisksHealthReport());
}
// TODO handle ExitCodeException separately?
} catch (Exception e) {
LOG.info("Localizer failed", e);
// 3) on error, report failure to Container and signal ABORT
// 3.1) notify resource of failed localization
ContainerId cId = context.getContainerId();
dispatcher.getEventHandler().handle(
new ContainerResourceFailedEvent(cId, null, e));
} finally {
for (LocalizerResourceRequestEvent event : scheduled.values()) {
event.getResource().unlock();
}
delService.delete(null, nmPrivateCTokensPath, new Path[] {});
}
}
private void writeCredentials(Path nmPrivateCTokensPath)
throws IOException {
DataOutputStream tokenOut = null;
try {
Credentials credentials = context.getCredentials();
FileContext lfs = getLocalFileContext(getConfig());
tokenOut =
lfs.create(nmPrivateCTokensPath, EnumSet.of(CREATE, OVERWRITE));
LOG.info("Writing credentials to the nmPrivate file "
+ nmPrivateCTokensPath.toString() + ". Credentials list: ");
if (LOG.isDebugEnabled()) {
for (Token<? extends TokenIdentifier> tk : credentials
.getAllTokens()) {
LOG.debug(tk.getService() + " : " + tk.encodeToUrlString());
}
}
credentials.writeTokenStorageToStream(tokenOut);
} finally {
if (tokenOut != null) {
tokenOut.close();
}
}
}
}
static class CacheCleanup extends Thread {
private final Dispatcher dispatcher;
public CacheCleanup(Dispatcher dispatcher) {
super("CacheCleanup");
this.dispatcher = dispatcher;
}
@Override
@SuppressWarnings("unchecked") // dispatcher not typed
public void run() {
dispatcher.getEventHandler().handle(
new LocalizationEvent(LocalizationEventType.CACHE_CLEANUP));
}
}
}