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YARN-573. Shared data structures in Public Localizer and Private Localizer are not Thread safe. Contributed by Omkar Vinit Joshi 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1509389 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jason Darrell Lowe 2013-08-01 19:34:55 +00:00
parent 60be5fb9ed
commit 4757963d32
2 changed files with 50 additions and 50 deletions
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3
hadoop-yarn-project/CHANGES.txt
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@ -783,6 +783,9 @@ Release 2.1.0-beta - 2013-08-06
YARN-945. Removed setting of AMRMToken's service from ResourceManager
and changed client libraries do it all the time and correctly. (vinodkv)
YARN-573. Shared data structures in Public Localizer and Private Localizer
are not Thread safe. (Omkar Vinit Joshi via jlowe)
BREAKDOWN OF HADOOP-8562/YARN-191 SUBTASKS AND RELATED JIRAS
YARN-158. Yarn creating package-info.java must not depend on sh.

97
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/ResourceLocalizationService.java
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@ -29,6 +29,7 @@ import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Iterator;
@ -630,23 +631,16 @@ public class ResourceLocalizationService extends CompositeService
final Configuration conf;
final ExecutorService threadPool;
final CompletionService<Path> queue;
// Its shared between public localizer and dispatcher thread.
final Map<Future<Path>,LocalizerResourceRequestEvent> pending;
PublicLocalizer(Configuration conf) {
this(conf, getLocalFileContext(conf),
createLocalizerExecutor(conf),
new HashMap<Future<Path>,LocalizerResourceRequestEvent>());
}
PublicLocalizer(Configuration conf, FileContext lfs,
ExecutorService threadPool,
Map<Future<Path>,LocalizerResourceRequestEvent> pending) {
super("Public Localizer");
this.lfs = lfs;
this.lfs = getLocalFileContext(conf);
this.conf = conf;
this.pending = pending;
this.threadPool = threadPool;
this.pending =
new ConcurrentHashMap<Future<Path>, LocalizerResourceRequestEvent>();
this.threadPool = createLocalizerExecutor(conf);
this.queue = new ExecutorCompletionService<Path>(threadPool);
}
@ -748,6 +742,7 @@ public class ResourceLocalizationService extends CompositeService
final LocalizerContext context;
final String localizerId;
final Map<LocalResourceRequest,LocalizerResourceRequestEvent> scheduled;
// Its a shared list between Private Localizer and dispatcher thread.
final List<LocalizerResourceRequestEvent> pending;
// TODO: threadsafe, use outer?
@ -758,13 +753,14 @@ public class ResourceLocalizationService extends CompositeService
super("LocalizerRunner for " + localizerId);
this.context = context;
this.localizerId = localizerId;
this.pending = new ArrayList<LocalizerResourceRequestEvent>();
this.pending =
Collections
.synchronizedList(new ArrayList<LocalizerResourceRequestEvent>());
this.scheduled =
new HashMap<LocalResourceRequest, LocalizerResourceRequestEvent>();
}
public void addResource(LocalizerResourceRequestEvent request) {
// TDOO: Synchronization
pending.add(request);
}
@ -774,43 +770,44 @@ public class ResourceLocalizationService extends CompositeService
* @return
*/
private LocalResource findNextResource() {
// TODO: Synchronization
for (Iterator<LocalizerResourceRequestEvent> i = pending.iterator();
i.hasNext();) {
LocalizerResourceRequestEvent evt = i.next();
LocalizedResource nRsrc = evt.getResource();
// Resource download should take place ONLY if resource is in
// Downloading state
if (!ResourceState.DOWNLOADING.equals(nRsrc.getState())) {
i.remove();
continue;
}
/*
* Multiple containers will try to download the same resource. So the
* resource download should start only if
* 1) We can acquire a non blocking semaphore lock on resource
* 2) Resource is still in DOWNLOADING state
*/
if (nRsrc.tryAcquire()) {
if (nRsrc.getState().equals(ResourceState.DOWNLOADING)) {
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());
next.setPattern(evt.getPattern());
scheduled.put(nextRsrc, evt);
return next;
} else {
// Need to release acquired lock
nRsrc.unlock();
}
}
synchronized (pending) {
for (Iterator<LocalizerResourceRequestEvent> i = pending.iterator();
i.hasNext();) {
LocalizerResourceRequestEvent evt = i.next();
LocalizedResource nRsrc = evt.getResource();
// Resource download should take place ONLY if resource is in
// Downloading state
if (!ResourceState.DOWNLOADING.equals(nRsrc.getState())) {
i.remove();
continue;
}
/*
* Multiple containers will try to download the same resource. So the
* resource download should start only if
* 1) We can acquire a non blocking semaphore lock on resource
* 2) Resource is still in DOWNLOADING state
*/
if (nRsrc.tryAcquire()) {
if (nRsrc.getState().equals(ResourceState.DOWNLOADING)) {
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());
next.setPattern(evt.getPattern());
scheduled.put(nextRsrc, evt);
return next;
} else {
// Need to release acquired lock
nRsrc.unlock();
}
}
}
return null;
}
return null;
}
LocalizerHeartbeatResponse update(