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MAPREDUCE-2691. Increase threadpool size for launching containers in MapReduce ApplicationMaster. Contributed by Vinod K V.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1175294 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Arun Murthy 2011-09-25 04:43:51 +00:00
parent e7b63aebcb
commit d09ceac1f7
3 changed files with 41 additions and 9 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
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@ -1406,6 +1406,9 @@ Release 0.23.0 - Unreleased
MAPREDUCE-3073. Fixed build issues in MR1. (mahadev via acmurthy)
MAPREDUCE-2691. Increase threadpool size for launching containers in
MapReduce ApplicationMaster. (vinodkv via acmurthy)
Release 0.22.0 - Unreleased
INCOMPATIBLE CHANGES

31
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/launcher/ContainerLauncherImpl.java
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@ -73,6 +73,8 @@ public class ContainerLauncherImpl extends AbstractService implements
private AppContext context;
private ThreadPoolExecutor launcherPool;
private static final int INITIAL_POOL_SIZE = 10;
private int limitOnPoolSize;
private Thread eventHandlingThread;
private BlockingQueue<ContainerLauncherEvent> eventQueue =
new LinkedBlockingQueue<ContainerLauncherEvent>();
@ -96,16 +98,17 @@ public synchronized void init(Configuration conf) {
YarnConfiguration.YARN_SECURITY_INFO,
ContainerManagerSecurityInfo.class, SecurityInfo.class);
this.recordFactory = RecordFactoryProvider.getRecordFactory(conf);
this.limitOnPoolSize = conf.getInt(
MRJobConfig.MR_AM_CONTAINERLAUNCHER_THREAD_COUNT_LIMIT,
MRJobConfig.DEFAULT_MR_AM_CONTAINERLAUNCHER_THREAD_COUNT_LIMIT);
super.init(myLocalConfig);
}
public void start() {
launcherPool =
new ThreadPoolExecutor(getConfig().getInt(
MRJobConfig.MR_AM_CONTAINERLAUNCHER_THREAD_COUNT, 10),
// Start with a default core-pool size of 10 and change it dynamically.
launcherPool = new ThreadPoolExecutor(INITIAL_POOL_SIZE,
Integer.MAX_VALUE, 1, TimeUnit.HOURS,
new LinkedBlockingQueue<Runnable>());
launcherPool.prestartAllCoreThreads(); // Wait for work.
eventHandlingThread = new Thread(new Runnable() {
@Override
public void run() {
@ -117,6 +120,26 @@ public void run() {
LOG.error("Returning, interrupted : " + e);
return;
}
int poolSize = launcherPool.getCorePoolSize();
// See if we need up the pool size only if haven't reached the
// maximum limit yet.
if (poolSize != limitOnPoolSize) {
// nodes where containers will run at *this* point of time. This is
// *not* the cluster size and doesn't need to be.
int numNodes = ugiMap.size();
int idealPoolSize = Math.min(limitOnPoolSize, numNodes);
if (poolSize <= idealPoolSize) {
// Bump up the pool size to idealPoolSize+INITIAL_POOL_SIZE, the
// later is just a buffer so we are not always increasing the
// pool-size
launcherPool.setCorePoolSize(idealPoolSize + INITIAL_POOL_SIZE);
}
}
// the events from the queue are handled in parallel
// using a thread pool
launcherPool.execute(new EventProcessor(event));

12
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/MRJobConfig.java
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@ -332,9 +332,15 @@ public interface MRJobConfig {
MR_AM_PREFIX+"num-progress-splits";
public static final int DEFAULT_MR_AM_NUM_PROGRESS_SPLITS = 12;
/** Number of threads user to launch containers in the app master.*/
public static final String MR_AM_CONTAINERLAUNCHER_THREAD_COUNT =
MR_AM_PREFIX+"containerlauncher.thread-count";
/**
* Upper limit on the number of threads user to launch containers in the app
* master. Expect level config, you shouldn't be needing it in most cases.
*/
public static final String MR_AM_CONTAINERLAUNCHER_THREAD_COUNT_LIMIT =
MR_AM_PREFIX+"containerlauncher.thread-count-limit";
public static final int DEFAULT_MR_AM_CONTAINERLAUNCHER_THREAD_COUNT_LIMIT =
500;
/** Number of threads to handle job client RPC requests.*/
public static final String MR_AM_JOB_CLIENT_THREAD_COUNT =