svn merge -c 1305607 trunk to branch-0.23.2 FIXES: MAPREDUCE-4061. RM only has 1 AM launcher thread (tgraves via bobby)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23.2@1305610 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -178,6 +178,8 @@ Release 0.23.2 - UNRELEASED
     MAPREDUCE-4006. History server container log web UI sometimes combines
     stderr/stdout/syslog contents together (Siddharth Seth via tgraves)
 
+    MAPREDUCE-4061. RM only has 1 AM launcher thread (tgraves via bobby)
+
 Release 0.23.1 - 2012-02-17
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/taskclean/TaskCleanerImpl.java

@@ -53,7 +53,7 @@ public class TaskCleanerImpl extends AbstractService implements TaskCleaner {
     ThreadFactory tf = new ThreadFactoryBuilder()
       .setNameFormat("TaskCleaner #%d")
       .build();
-    launcherPool = new ThreadPoolExecutor(1, 5, 1, 
+    launcherPool = new ThreadPoolExecutor(5, 5, 1, 
         TimeUnit.HOURS, new LinkedBlockingQueue<Runnable>(), tf);
     eventHandlingThread = new Thread(new Runnable() {
       @Override

hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/amlauncher/ApplicationMasterLauncher.java

@@ -52,7 +52,7 @@ public class ApplicationMasterLauncher extends AbstractService implements
       RMContext context) {
     super(ApplicationMasterLauncher.class.getName());
     this.context = context;
-    this.launcherPool = new ThreadPoolExecutor(1, 10, 1, 
+    this.launcherPool = new ThreadPoolExecutor(10, 10, 1, 
         TimeUnit.HOURS, new LinkedBlockingQueue<Runnable>());
     this.launcherHandlingThread = new LauncherThread();
     this.applicationTokenSecretManager = applicationTokenSecretManager;