YARN-3915. scmadmin help message correction (Bibin A Chundatt via aw)

hadoop-yarn-project/CHANGES.txt

@@ -51,6 +51,8 @@ Trunk - Unreleased
     YARN-2355. MAX_APP_ATTEMPTS_ENV may no longer be a useful env var
     for a container (Darrell Taylor via aw)
 
+    YARN-3915. scmadmin help message correction (Bibin A Chundatt via aw)
+
 Release 2.8.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

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

@@ -52,7 +52,7 @@ private static void printHelp(String cmd) {
     String summary = "scmadmin is the command to execute shared cache manager" +
         "administrative commands.\n" +
         "The full syntax is: \n\n" +
-        "hadoop scmadmin" +
+        "yarn scmadmin" +
         " [-runCleanerTask]" +
         " [-help [cmd]]\n";