Merge -c 1391944 from trunk to branch-0.23 to fix YARN-138. Ensure default values for minimum/maximum container sizes is sane. Contributed by Harsh J and Siddharth Seth.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1391951 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java

@@ -111,18 +111,18 @@ public class YarnConfiguration extends Configuration {
   /** Miniumum memory request grant-able by the RM scheduler. */
   public static final String RM_SCHEDULER_MINIMUM_ALLOCATION_MB =
     YARN_PREFIX + "scheduler.minimum-allocation-mb";
-  public static final int DEFAULT_RM_SCHEDULER_MINIMUM_ALLOCATION_MB = 128;
+  public static final int DEFAULT_RM_SCHEDULER_MINIMUM_ALLOCATION_MB = 1024;
 
   /** Maximum memory request grant-able by the RM scheduler. */
   public static final String RM_SCHEDULER_MAXIMUM_ALLOCATION_MB =
     YARN_PREFIX + "scheduler.maximum-allocation-mb";
-  public static final int DEFAULT_RM_SCHEDULER_MAXIMUM_ALLOCATION_MB = 10240;
+  public static final int DEFAULT_RM_SCHEDULER_MAXIMUM_ALLOCATION_MB = 8192;
 
   /** Number of threads to handle scheduler interface.*/
   public static final String RM_SCHEDULER_CLIENT_THREAD_COUNT =
     RM_PREFIX + "scheduler.client.thread-count";
   public static final int DEFAULT_RM_SCHEDULER_CLIENT_THREAD_COUNT = 50;
-  
+
   /** The address of the RM web application.*/
   public static final String RM_WEBAPP_ADDRESS = 
     RM_PREFIX + "webapp.address";

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/yarn-default.xml

@@ -193,7 +193,7 @@
     in MBs. Memory requests lower than this won't take effect,
     and the specified value will get allocated at minimum.</description>
     <name>yarn.scheduler.minimum-allocation-mb</name>
-    <value>128</value>
+    <value>1024</value>
   </property>
 
   <property>
@@ -201,7 +201,7 @@
     in MBs. Memory requests higher than this won't take effect,
     and will get capped to this value.</description>
     <name>yarn.scheduler.maximum-allocation-mb</name>
-    <value>10240</value>
+    <value>8192</value>
   </property>
 
   <property>

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestFifoScheduler.java

@@ -194,7 +194,7 @@ public class TestFifoScheduler {
   @Test
   public void testNonDefaultMinimumAllocation() throws Exception {
     // Set custom min-alloc to test tweaking it
-    int allocMB = 512;
+    int allocMB = 1536;
     YarnConfiguration conf = new YarnConfiguration(TestFifoScheduler.conf);
     conf.setInt(YarnConfiguration.RM_SCHEDULER_MINIMUM_ALLOCATION_MB, allocMB);
     // Test for something lesser than this.