Merge r1553596 from trunk. Fixed yarn rmadmin command to print the correct usage info. Contributed by Akira AJISAKA.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1553597 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/CHANGES.txt

@@ -251,6 +251,9 @@ Release 2.4.0 - UNRELEASED
     YARN-1451. TestResourceManager relies on the scheduler assigning multiple
     containers in a single node update. (Sandy Ryza via kasha)
 
+    YARN-1527. Fix yarn rmadmin command to print the correct usage info.
+    (Akira AJISAKA via jianhe)
+
 Release 2.3.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/RMAdminCLI.java

@@ -122,13 +122,13 @@ public class RMAdminCLI extends HAAdmin {
       }
     }
     String space = (usageInfo.args == "") ? "" : " ";
-    builder.append("Usage: java RMAdmin ["
+    builder.append("Usage: yarn rmadmin ["
         + cmd + space + usageInfo.args
         + "]\n");
   }
 
   private static void buildUsageMsg(StringBuilder builder) {
-    builder.append("Usage: java RMAdmin");
+    builder.append("Usage: yarn rmadmin\n");
     for (String cmdKey : ADMIN_USAGE.keySet()) {
       UsageInfo usageInfo = ADMIN_USAGE.get(cmdKey);
       builder.append("   " + cmdKey + " " + usageInfo.args + "\n");

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/TestRMAdminCLI.java

@@ -241,37 +241,37 @@ public class TestRMAdminCLI {
               "commands if none"));
 
       testError(new String[] { "-help", "-refreshQueues" },
-          "Usage: java RMAdmin [-refreshQueues]", dataErr, 0);
+          "Usage: yarn rmadmin [-refreshQueues]", dataErr, 0);
       testError(new String[] { "-help", "-refreshNodes" },
-          "Usage: java RMAdmin [-refreshNodes]", dataErr, 0);
+          "Usage: yarn rmadmin [-refreshNodes]", dataErr, 0);
       testError(new String[] { "-help", "-refreshUserToGroupsMappings" },
-          "Usage: java RMAdmin [-refreshUserToGroupsMappings]", dataErr, 0);
+          "Usage: yarn rmadmin [-refreshUserToGroupsMappings]", dataErr, 0);
       testError(
           new String[] { "-help", "-refreshSuperUserGroupsConfiguration" },
-          "Usage: java RMAdmin [-refreshSuperUserGroupsConfiguration]",
+          "Usage: yarn rmadmin [-refreshSuperUserGroupsConfiguration]",
           dataErr, 0);
       testError(new String[] { "-help", "-refreshAdminAcls" },
-          "Usage: java RMAdmin [-refreshAdminAcls]", dataErr, 0);
+          "Usage: yarn rmadmin [-refreshAdminAcls]", dataErr, 0);
       testError(new String[] { "-help", "-refreshServiceAcl" },
-          "Usage: java RMAdmin [-refreshServiceAcl]", dataErr, 0);
+          "Usage: yarn rmadmin [-refreshServiceAcl]", dataErr, 0);
       testError(new String[] { "-help", "-getGroups" },
-          "Usage: java RMAdmin [-getGroups [username]]", dataErr, 0);
+          "Usage: yarn rmadmin [-getGroups [username]]", dataErr, 0);
       testError(new String[] { "-help", "-transitionToActive" },
-          "Usage: java RMAdmin [-transitionToActive <serviceId>]", dataErr, 0);
+          "Usage: yarn rmadmin [-transitionToActive <serviceId>]", dataErr, 0);
       testError(new String[] { "-help", "-transitionToStandby" },
-          "Usage: java RMAdmin [-transitionToStandby <serviceId>]", dataErr, 0);
+          "Usage: yarn rmadmin [-transitionToStandby <serviceId>]", dataErr, 0);
       testError(new String[] { "-help", "-getServiceState" },
-          "Usage: java RMAdmin [-getServiceState <serviceId>]", dataErr, 0);
+          "Usage: yarn rmadmin [-getServiceState <serviceId>]", dataErr, 0);
       testError(new String[] { "-help", "-checkHealth" },
-          "Usage: java RMAdmin [-checkHealth <serviceId>]", dataErr, 0);
+          "Usage: yarn rmadmin [-checkHealth <serviceId>]", dataErr, 0);
       testError(new String[] { "-help", "-failover" },
-          "Usage: java RMAdmin " +
+          "Usage: yarn rmadmin " +
               "[-failover [--forcefence] [--forceactive] " +
               "<serviceId> <serviceId>]",
           dataErr, 0);
 
       testError(new String[] { "-help", "-badParameter" },
-          "Usage: java RMAdmin", dataErr, 0);
+          "Usage: yarn rmadmin", dataErr, 0);
       testError(new String[] { "-badParameter" },
           "badParameter: Unknown command", dataErr, -1); 
     } finally {