Fix OOM issue in DistributedShell. Contributed by Jian He.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-distributedshell/src/main/java/org/apache/hadoop/yarn/applications/distributedshell/ApplicationMaster.java

@@ -900,6 +900,7 @@ public class ApplicationMaster {
 
     @Override
     public void onError(Throwable e) {
+      LOG.error("Error in RMCallbackHandler: ", e);
       done = true;
       amRMClient.stop();
     }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-distributedshell/src/main/java/org/apache/hadoop/yarn/applications/distributedshell/Client.java

@@ -128,7 +128,7 @@ public class Client {
   // Queue for App master
   private String amQueue = "";
   // Amt. of memory resource to request for to run the App Master
-  private long amMemory = 10;
+  private long amMemory = 100;
   // Amt. of virtual core resource to request for to run the App Master
   private int amVCores = 1;
 
@@ -359,7 +359,7 @@ public class Client {
     appName = cliParser.getOptionValue("appname", "DistributedShell");
     amPriority = Integer.parseInt(cliParser.getOptionValue("priority", "0"));
     amQueue = cliParser.getOptionValue("queue", "default");
-    amMemory = Integer.parseInt(cliParser.getOptionValue("master_memory", "10"));		
+    amMemory = Integer.parseInt(cliParser.getOptionValue("master_memory", "100"));
     amVCores = Integer.parseInt(cliParser.getOptionValue("master_vcores", "1"));
 
     if (amMemory < 0) {