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
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@ -783,6 +783,9 @@ Release 2.1.0-beta - 2013-08-06
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YARN-945. Removed setting of AMRMToken's service from ResourceManager
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and changed client libraries do it all the time and correctly. (vinodkv)
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YARN-573. Shared data structures in Public Localizer and Private Localizer
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are not Thread safe. (Omkar Vinit Joshi via jlowe)
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BREAKDOWN OF HADOOP-8562/YARN-191 SUBTASKS AND RELATED JIRAS
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YARN-158. Yarn creating package-info.java must not depend on sh.
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@ -29,6 +29,7 @@
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.EnumSet;
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import java.util.HashMap;
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import java.util.Iterator;
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@ -630,23 +631,16 @@ class PublicLocalizer extends Thread {
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final Configuration conf;
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final ExecutorService threadPool;
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final CompletionService<Path> queue;
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// Its shared between public localizer and dispatcher thread.
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final Map<Future<Path>,LocalizerResourceRequestEvent> pending;
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PublicLocalizer(Configuration conf) {
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this(conf, getLocalFileContext(conf),
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createLocalizerExecutor(conf),
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new HashMap<Future<Path>,LocalizerResourceRequestEvent>());
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}
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PublicLocalizer(Configuration conf, FileContext lfs,
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ExecutorService threadPool,
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Map<Future<Path>,LocalizerResourceRequestEvent> pending) {
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super("Public Localizer");
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this.lfs = lfs;
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this.lfs = getLocalFileContext(conf);
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this.conf = conf;
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this.pending = pending;
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this.threadPool = threadPool;
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this.pending =
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new ConcurrentHashMap<Future<Path>, LocalizerResourceRequestEvent>();
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this.threadPool = createLocalizerExecutor(conf);
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this.queue = new ExecutorCompletionService<Path>(threadPool);
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}
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@ -748,6 +742,7 @@ class LocalizerRunner extends Thread {
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final LocalizerContext context;
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final String localizerId;
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final Map<LocalResourceRequest,LocalizerResourceRequestEvent> scheduled;
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// Its a shared list between Private Localizer and dispatcher thread.
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final List<LocalizerResourceRequestEvent> pending;
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// TODO: threadsafe, use outer?
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@ -758,13 +753,14 @@ class LocalizerRunner extends Thread {
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super("LocalizerRunner for " + localizerId);
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this.context = context;
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this.localizerId = localizerId;
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this.pending = new ArrayList<LocalizerResourceRequestEvent>();
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this.pending =
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Collections
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.synchronizedList(new ArrayList<LocalizerResourceRequestEvent>());
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this.scheduled =
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new HashMap<LocalResourceRequest, LocalizerResourceRequestEvent>();
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}
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public void addResource(LocalizerResourceRequestEvent request) {
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// TDOO: Synchronization
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pending.add(request);
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}
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@ -774,43 +770,44 @@ public void addResource(LocalizerResourceRequestEvent request) {
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* @return
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*/
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private LocalResource findNextResource() {
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// TODO: Synchronization
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for (Iterator<LocalizerResourceRequestEvent> i = pending.iterator();
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i.hasNext();) {
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LocalizerResourceRequestEvent evt = i.next();
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LocalizedResource nRsrc = evt.getResource();
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// Resource download should take place ONLY if resource is in
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// Downloading state
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if (!ResourceState.DOWNLOADING.equals(nRsrc.getState())) {
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i.remove();
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continue;
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}
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/*
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* Multiple containers will try to download the same resource. So the
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* resource download should start only if
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* 1) We can acquire a non blocking semaphore lock on resource
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* 2) Resource is still in DOWNLOADING state
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*/
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if (nRsrc.tryAcquire()) {
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if (nRsrc.getState().equals(ResourceState.DOWNLOADING)) {
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LocalResourceRequest nextRsrc = nRsrc.getRequest();
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LocalResource next =
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recordFactory.newRecordInstance(LocalResource.class);
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next.setResource(ConverterUtils.getYarnUrlFromPath(nextRsrc
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.getPath()));
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next.setTimestamp(nextRsrc.getTimestamp());
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next.setType(nextRsrc.getType());
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next.setVisibility(evt.getVisibility());
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next.setPattern(evt.getPattern());
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scheduled.put(nextRsrc, evt);
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return next;
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} else {
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// Need to release acquired lock
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nRsrc.unlock();
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}
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}
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synchronized (pending) {
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for (Iterator<LocalizerResourceRequestEvent> i = pending.iterator();
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i.hasNext();) {
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LocalizerResourceRequestEvent evt = i.next();
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LocalizedResource nRsrc = evt.getResource();
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// Resource download should take place ONLY if resource is in
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// Downloading state
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if (!ResourceState.DOWNLOADING.equals(nRsrc.getState())) {
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i.remove();
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continue;
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}
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/*
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* Multiple containers will try to download the same resource. So the
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* resource download should start only if
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* 1) We can acquire a non blocking semaphore lock on resource
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* 2) Resource is still in DOWNLOADING state
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*/
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if (nRsrc.tryAcquire()) {
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if (nRsrc.getState().equals(ResourceState.DOWNLOADING)) {
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LocalResourceRequest nextRsrc = nRsrc.getRequest();
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LocalResource next =
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recordFactory.newRecordInstance(LocalResource.class);
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next.setResource(ConverterUtils.getYarnUrlFromPath(nextRsrc
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.getPath()));
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next.setTimestamp(nextRsrc.getTimestamp());
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next.setType(nextRsrc.getType());
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next.setVisibility(evt.getVisibility());
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next.setPattern(evt.getPattern());
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scheduled.put(nextRsrc, evt);
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return next;
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} else {
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// Need to release acquired lock
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nRsrc.unlock();
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}
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}
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}
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return null;
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}
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return null;
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}
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LocalizerHeartbeatResponse update(
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