YARN-2924. Fixed RMAdminCLI to not convert node labels to lower case. Contributed by Wangda Tan

(cherry picked from commit 437322afcaa4b1b260501af160283c97eb589419)

hadoop-yarn-project/CHANGES.txt

@@ -179,6 +179,9 @@ Release 2.7.0 - UNRELEASED
     YARN-2930. Fixed TestRMRestart#testRMRestartRecoveringNodeLabelManager
     intermittent failure. (Wangda Tan via jianhe)
 
+    YARN-2924. Fixed RMAdminCLI to not convert node labels to lower case.
+    (Wangda Tan via jianhe)
+
 Release 2.6.0 - 2014-11-18
 
   INCOMPATIBLE CHANGES

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

@@ -399,7 +399,7 @@ public class RMAdminCLI extends HAAdmin {
 
       for (int i = 1; i < splits.length; i++) {
         if (!splits[i].trim().isEmpty()) {
-          map.get(nodeId).add(splits[i].trim().toLowerCase());
+          map.get(nodeId).add(splits[i].trim());
         }
       }
     }

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

@@ -468,9 +468,9 @@ public class TestRMAdminCLI {
   @Test
   public void testReplaceLabelsOnNode() throws Exception {
     // Successfully replace labels
-    dummyNodeLabelsManager.addToCluserNodeLabels(ImmutableSet.of("x", "y"));
+    dummyNodeLabelsManager.addToCluserNodeLabels(ImmutableSet.of("x", "Y"));
     String[] args =
-        { "-replaceLabelsOnNode", "node1,x,y node2,y",
+        { "-replaceLabelsOnNode", "node1,x,Y node2,Y",
             "-directlyAccessNodeLabelStore" };
     assertEquals(0, rmAdminCLI.run(args));
     assertTrue(dummyNodeLabelsManager.getNodeLabels().containsKey(