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From jia...@apache.org
Subject hadoop git commit: YARN-2694. Ensure only single node label specified in ResourceRequest. Contributed by Wangda Tan
Date Fri, 06 Feb 2015 19:34:40 GMT
Repository: hadoop
Updated Branches:
  refs/heads/trunk eaab959a3 -> c1957fef2


YARN-2694. Ensure only single node label specified in ResourceRequest. Contributed by Wangda Tan


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/c1957fef
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/c1957fef
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/c1957fef

Branch: refs/heads/trunk
Commit: c1957fef29b07fea70938e971b30532a1e131fd0
Parents: eaab959
Author: Jian He <jianhe@apache.org>
Authored: Fri Feb 6 11:34:12 2015 -0800
Committer: Jian He <jianhe@apache.org>
Committed: Fri Feb 6 11:34:20 2015 -0800

----------------------------------------------------------------------
 hadoop-yarn-project/CHANGES.txt                 |   3 +
 .../yarn/api/records/ResourceRequest.java       |  21 ++--
 .../hadoop/yarn/client/api/AMRMClient.java      |   3 +-
 .../yarn/client/api/impl/AMRMClientImpl.java    |  37 ++++++-
 .../hadoop/yarn/client/cli/RMAdminCLI.java      |  20 ++--
 .../yarn/client/api/impl/TestAMRMClient.java    |  58 +++++++++--
 .../hadoop/yarn/client/cli/TestRMAdminCLI.java  |  12 ++-
 .../nodelabels/CommonNodeLabelsManager.java     |  45 +++++++-
 .../nodelabels/TestCommonNodeLabelsManager.java | 104 +++++++++++--------
 .../ApplicationMasterService.java               |   5 +-
 .../scheduler/SchedulerUtils.java               |  22 +++-
 .../yarn/server/resourcemanager/MockAM.java     |  17 +--
 .../server/resourcemanager/TestRMRestart.java   |   6 +-
 .../nodelabels/TestRMNodeLabelsManager.java     |  50 ++++-----
 .../scheduler/TestSchedulerUtils.java           |  54 ++++++++--
 .../capacity/TestContainerAllocation.java       |  32 +++---
 .../webapp/TestRMWebServicesNodeLabels.java     |  17 ++-
 17 files changed, 355 insertions(+), 151 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/CHANGES.txt
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/CHANGES.txt b/hadoop-yarn-project/CHANGES.txt
index 0da4c33..2220c2a 100644
--- a/hadoop-yarn-project/CHANGES.txt
+++ b/hadoop-yarn-project/CHANGES.txt
@@ -501,6 +501,9 @@ Release 2.7.0 - UNRELEASED
     YARN-1537. Fix race condition in
     TestLocalResourcesTrackerImpl.testLocalResourceCache. (xgong via acmurthy)
 
+    YARN-2694. Ensure only single node label specified in ResourceRequest.
+    (Wangda Tan via jianhe)
+
 Release 2.6.0 - 2014-11-18
 
   INCOMPATIBLE CHANGES

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ResourceRequest.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ResourceRequest.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ResourceRequest.java
index 7f86cae..2f17ac9 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ResourceRequest.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/ResourceRequest.java
@@ -253,24 +253,27 @@ public abstract class ResourceRequest implements Comparable<ResourceRequest> {
   /**
    * Get node-label-expression for this Resource Request. If this is set, all
    * containers allocated to satisfy this resource-request will be only on those
-   * nodes that satisfy this node-label-expression
+   * nodes that satisfy this node-label-expression.
+   *  
+   * Please note that node label expression now can only take effect when the
+   * resource request has resourceName = ANY
    * 
    * @return node-label-expression
    */
   @Public
   @Evolving
-  public abstract String getNodeLabelExpression(); 
+  public abstract String getNodeLabelExpression();
   
   /**
-   * Set node label expression of this resource request. Now only
-   * support AND(&&), in the future will provide support for OR(||), NOT(!).
+   * Set node label expression of this resource request. Now only support
+   * specifying a single node label. In the future we will support more complex
+   * node label expression specification like AND(&&), OR(||), etc.
    * 
-   * Examples: 
-   * - GPU && LARGE_MEM, ask for node has label GPU and LARGE_MEM together
-   * - "" (empty) means ask for node doesn't have label on it, this is default
-   *   behavior
+   * Any please note that node label expression now can only take effect when
+   * the resource request has resourceName = ANY
    * 
-   * @param nodelabelExpression node-label-expression of this ResourceRequest
+   * @param nodelabelExpression
+   *          node-label-expression of this ResourceRequest
    */
   @Public
   @Evolving

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/AMRMClient.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/AMRMClient.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/AMRMClient.java
index 6f8c65a..9923806 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/AMRMClient.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/AMRMClient.java
@@ -169,7 +169,8 @@ public abstract class AMRMClient<T extends AMRMClient.ContainerRequest> extends
      *          If true, containers for this request may be assigned on hosts
      *          and racks other than the ones explicitly requested.
      * @param nodeLabelsExpression
-     *          Set node labels to allocate resource
+     *          Set node labels to allocate resource, now we only support
+     *          asking for only a single node label
      */
     public ContainerRequest(Resource capability, String[] nodes,
         String[] racks, Priority priority, boolean relaxLocality,

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/impl/AMRMClientImpl.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/impl/AMRMClientImpl.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/impl/AMRMClientImpl.java
index ab8aaa8..b1324c1 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/impl/AMRMClientImpl.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/impl/AMRMClientImpl.java
@@ -421,6 +421,8 @@ public class AMRMClientImpl<T extends ContainerRequest> extends AMRMClient<T> {
     checkLocalityRelaxationConflict(req.getPriority(), dedupedRacks, true);
     checkLocalityRelaxationConflict(req.getPriority(), inferredRacks,
         req.getRelaxLocality());
+    // check if the node label expression specified is valid
+    checkNodeLabelExpression(req);
 
     if (req.getNodes() != null) {
       HashSet<String> dedupedNodes = new HashSet<String>(req.getNodes());
@@ -586,6 +588,37 @@ public class AMRMClientImpl<T extends ContainerRequest> extends AMRMClient<T> {
       }
   }
   
+  /**
+   * Valid if a node label expression specified on container request is valid or
+   * not
+   * 
+   * @param containerRequest
+   */
+  private void checkNodeLabelExpression(T containerRequest) {
+    String exp = containerRequest.getNodeLabelExpression();
+    
+    if (null == exp || exp.isEmpty()) {
+      return;
+    }
+
+    // Don't support specifying >= 2 node labels in a node label expression now
+    if (exp.contains("&&") || exp.contains("||")) {
+      throw new InvalidContainerRequestException(
+          "Cannot specify more than two node labels"
+              + " in a single node label expression");
+    }
+    
+    // Don't allow specify node label against ANY request
+    if ((containerRequest.getRacks() != null && 
+        (!containerRequest.getRacks().isEmpty()))
+        || 
+        (containerRequest.getNodes() != null && 
+        (!containerRequest.getNodes().isEmpty()))) {
+      throw new InvalidContainerRequestException(
+          "Cannot specify node label with rack and node");
+    }
+  }
+  
   private void addResourceRequestToAsk(ResourceRequest remoteRequest) {
     // This code looks weird but is needed because of the following scenario.
     // A ResourceRequest is removed from the remoteRequestTable. A 0 container 
@@ -640,7 +673,9 @@ public class AMRMClientImpl<T extends ContainerRequest> extends AMRMClient<T> {
       resourceRequestInfo.containerRequests.add(req);
     }
     
-    resourceRequestInfo.remoteRequest.setNodeLabelExpression(labelExpression);
+    if (ResourceRequest.ANY.equals(resourceName)) {
+      resourceRequestInfo.remoteRequest.setNodeLabelExpression(labelExpression);
+    }
 
     // Note this down for next interaction with ResourceManager
     addResourceRequestToAsk(resourceRequestInfo.remoteRequest);

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/RMAdminCLI.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/RMAdminCLI.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/RMAdminCLI.java
index 6f1bbd0..af83102 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/RMAdminCLI.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/RMAdminCLI.java
@@ -59,6 +59,7 @@ import org.apache.hadoop.yarn.server.api.protocolrecords.RemoveFromClusterNodeLa
 import org.apache.hadoop.yarn.server.api.protocolrecords.ReplaceLabelsOnNodeRequest;
 import org.apache.hadoop.yarn.util.ConverterUtils;
 
+import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableMap;
 
 @Private
@@ -102,7 +103,9 @@ public class RMAdminCLI extends HAAdmin {
           .put("-replaceLabelsOnNode",
               new UsageInfo(
                   "[node1[:port]=label1,label2 node2[:port]=label1,label2]",
-                  "replace labels on nodes"))
+                  "replace labels on nodes"
+                      + " (please note that we do not support specifying multiple"
+                      + " labels on a single host for now.)"))
           .put("-directlyAccessNodeLabelStore",
               new UsageInfo("", "Directly access node label store, "
                   + "with this option, all node label related operations"
@@ -389,8 +392,7 @@ public class RMAdminCLI extends HAAdmin {
     return 0;
   }
   
-  private Map<NodeId, Set<String>> buildNodeLabelsMapFromStr(String args)
-      throws IOException {
+  private Map<NodeId, Set<String>> buildNodeLabelsMapFromStr(String args) {
     Map<NodeId, Set<String>> map = new HashMap<NodeId, Set<String>>();
 
     for (String nodeToLabels : args.split("[ \n]")) {
@@ -411,10 +413,9 @@ public class RMAdminCLI extends HAAdmin {
       if (index == 0) {
         splits = splits[1].split(",");
       }
-
-      if (nodeIdStr.trim().isEmpty()) {
-        throw new IOException("node name cannot be empty");
-      }
+      
+      Preconditions.checkArgument(!nodeIdStr.trim().isEmpty(),
+          "node name cannot be empty");
 
       NodeId nodeId = ConverterUtils.toNodeIdWithDefaultPort(nodeIdStr);
       map.put(nodeId, new HashSet<String>());
@@ -424,6 +425,11 @@ public class RMAdminCLI extends HAAdmin {
           map.get(nodeId).add(splits[i].trim());
         }
       }
+      
+      int nLabels = map.get(nodeId).size();
+      Preconditions.checkArgument(nLabels <= 1, "%d labels specified on host=%s"
+          + ", please note that we do not support specifying multiple"
+          + " labels on a single host for now.", nLabels, nodeIdStr);
     }
 
     if (map.isEmpty()) {

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/api/impl/TestAMRMClient.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/api/impl/TestAMRMClient.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/api/impl/TestAMRMClient.java
index 3c6918c..7d29d05 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/api/impl/TestAMRMClient.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/api/impl/TestAMRMClient.java
@@ -18,8 +18,6 @@
 
 package org.apache.hadoop.yarn.client.api.impl;
 
-import com.google.common.base.Supplier;
-
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
@@ -40,7 +38,6 @@ import java.util.List;
 import java.util.Set;
 import java.util.TreeSet;
 
-import org.junit.Assert;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.security.Credentials;
@@ -75,6 +72,7 @@ import org.apache.hadoop.yarn.api.records.YarnApplicationState;
 import org.apache.hadoop.yarn.client.ClientRMProxy;
 import org.apache.hadoop.yarn.client.api.AMRMClient;
 import org.apache.hadoop.yarn.client.api.AMRMClient.ContainerRequest;
+import org.apache.hadoop.yarn.client.api.InvalidContainerRequestException;
 import org.apache.hadoop.yarn.client.api.NMTokenCache;
 import org.apache.hadoop.yarn.client.api.YarnClient;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
@@ -89,6 +87,7 @@ import org.apache.hadoop.yarn.server.utils.BuilderUtils;
 import org.apache.hadoop.yarn.util.Records;
 import org.junit.After;
 import org.junit.AfterClass;
+import org.junit.Assert;
 import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Test;
@@ -96,6 +95,8 @@ import org.mockito.invocation.InvocationOnMock;
 import org.mockito.stubbing.Answer;
 import org.mortbay.log.Log;
 
+import com.google.common.base.Supplier;
+
 public class TestAMRMClient {
   static Configuration conf = null;
   static MiniYARNCluster yarnCluster = null;
@@ -148,7 +149,6 @@ public class TestAMRMClient {
     racks = new String[]{ rack };
   }
   
-  @SuppressWarnings("deprecation")
   @Before
   public void startApp() throws Exception {
     // submit new app
@@ -678,21 +678,57 @@ public class TestAMRMClient {
     AMRMClientImpl<ContainerRequest> client =
         new AMRMClientImpl<ContainerRequest>();
 
-    // add x, y to ANY
+    // add exp=x to ANY
     client.addContainerRequest(new ContainerRequest(Resource.newInstance(1024,
-        1), null, null, Priority.UNDEFINED, true, "x && y"));
+        1), null, null, Priority.UNDEFINED, true, "x"));
     Assert.assertEquals(1, client.ask.size());
-    Assert.assertEquals("x && y", client.ask.iterator().next()
+    Assert.assertEquals("x", client.ask.iterator().next()
         .getNodeLabelExpression());
 
-    // add x, y and a, b to ANY, only a, b should be kept
+    // add exp=x then add exp=a to ANY in same priority, only exp=a should kept
     client.addContainerRequest(new ContainerRequest(Resource.newInstance(1024,
-        1), null, null, Priority.UNDEFINED, true, "x && y"));
+        1), null, null, Priority.UNDEFINED, true, "x"));
     client.addContainerRequest(new ContainerRequest(Resource.newInstance(1024,
-        1), null, null, Priority.UNDEFINED, true, "a && b"));
+        1), null, null, Priority.UNDEFINED, true, "a"));
     Assert.assertEquals(1, client.ask.size());
-    Assert.assertEquals("a && b", client.ask.iterator().next()
+    Assert.assertEquals("a", client.ask.iterator().next()
         .getNodeLabelExpression());
+    
+    // add exp=x to ANY, rack and node, only resource request has ANY resource
+    // name will be assigned the label expression
+    // add exp=x then add exp=a to ANY in same priority, only exp=a should kept
+    client.addContainerRequest(new ContainerRequest(Resource.newInstance(1024,
+        1), null, null, Priority.UNDEFINED, true,
+        "y"));
+    Assert.assertEquals(1, client.ask.size());
+    for (ResourceRequest req : client.ask) {
+      if (ResourceRequest.ANY.equals(req.getResourceName())) {
+        Assert.assertEquals("y", req.getNodeLabelExpression());
+      } else {
+        Assert.assertNull(req.getNodeLabelExpression());
+      }
+    }
+  }
+  
+  private void verifyAddRequestFailed(AMRMClient<ContainerRequest> client,
+      ContainerRequest request) {
+    try {
+      client.addContainerRequest(request);
+    } catch (InvalidContainerRequestException e) {
+      return;
+    }
+    Assert.fail();
+  }
+  
+  @Test(timeout=30000)
+  public void testAskWithInvalidNodeLabels() {
+    AMRMClientImpl<ContainerRequest> client =
+        new AMRMClientImpl<ContainerRequest>();
+
+    // specified exp with more than one node labels
+    verifyAddRequestFailed(client,
+        new ContainerRequest(Resource.newInstance(1024, 1), null, null,
+            Priority.UNDEFINED, true, "x && y"));
   }
     
   private void testAllocation(final AMRMClientImpl<ContainerRequest> amClient)  

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestRMAdminCLI.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestRMAdminCLI.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestRMAdminCLI.java
index 1dfeac2..d448090 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestRMAdminCLI.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestRMAdminCLI.java
@@ -512,7 +512,7 @@ public class TestRMAdminCLI {
         .addToCluserNodeLabels(ImmutableSet.of("x", "y", "Y"));
     String[] args =
         { "-replaceLabelsOnNode",
-            "node1:8000,x,y node2:8000=y node3,x,Y node4=Y",
+            "node1:8000,x node2:8000=y node3,x node4=Y",
             "-directlyAccessNodeLabelStore" };
     assertEquals(0, rmAdminCLI.run(args));
     assertTrue(dummyNodeLabelsManager.getNodeLabels().containsKey(
@@ -540,6 +540,16 @@ public class TestRMAdminCLI {
     args = new String[] { "-replaceLabelsOnNode", ", " };
     assertTrue(0 != rmAdminCLI.run(args));
   }
+  
+  @Test
+  public void testReplaceMultipleLabelsOnSingleNode() throws Exception {
+    // Successfully replace labels
+    dummyNodeLabelsManager.addToCluserNodeLabels(ImmutableSet.of("x", "y"));
+    String[] args =
+        { "-replaceLabelsOnNode", "node1,x,y",
+            "-directlyAccessNodeLabelStore" };
+    assertTrue(0 != rmAdminCLI.run(args));
+  }
 
   private void testError(String[] args, String template,
       ByteArrayOutputStream data, int resultCode) throws Exception {

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/nodelabels/CommonNodeLabelsManager.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/nodelabels/CommonNodeLabelsManager.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/nodelabels/CommonNodeLabelsManager.java
index f8e7a20..25ff417 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/nodelabels/CommonNodeLabelsManager.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/nodelabels/CommonNodeLabelsManager.java
@@ -45,11 +45,12 @@ import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.event.AsyncDispatcher;
 import org.apache.hadoop.yarn.event.Dispatcher;
 import org.apache.hadoop.yarn.event.EventHandler;
+import org.apache.hadoop.yarn.exceptions.YarnException;
 import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
-import org.apache.hadoop.yarn.nodelabels.event.StoreNewClusterNodeLabels;
 import org.apache.hadoop.yarn.nodelabels.event.NodeLabelsStoreEvent;
 import org.apache.hadoop.yarn.nodelabels.event.NodeLabelsStoreEventType;
 import org.apache.hadoop.yarn.nodelabels.event.RemoveClusterNodeLabels;
+import org.apache.hadoop.yarn.nodelabels.event.StoreNewClusterNodeLabels;
 import org.apache.hadoop.yarn.nodelabels.event.UpdateNodeToLabelsMappingsEvent;
 import org.apache.hadoop.yarn.util.resource.Resources;
 
@@ -309,14 +310,35 @@ public class CommonNodeLabelsManager extends AbstractService {
     // check all labels being added existed
     Set<String> knownLabels = labelCollections.keySet();
     for (Entry<NodeId, Set<String>> entry : addedLabelsToNode.entrySet()) {
-      if (!knownLabels.containsAll(entry.getValue())) {
+      NodeId nodeId = entry.getKey();
+      Set<String> labels = entry.getValue();
+      
+      if (!knownLabels.containsAll(labels)) {
         String msg =
             "Not all labels being added contained by known "
                 + "label collections, please check" + ", added labels=["
-                + StringUtils.join(entry.getValue(), ",") + "]";
+                + StringUtils.join(labels, ",") + "]";
         LOG.error(msg);
         throw new IOException(msg);
       }
+      
+      // In YARN-2694, we temporarily disable user add more than 1 labels on a
+      // same host
+      if (!labels.isEmpty()) {
+        Set<String> newLabels = new HashSet<String>(getLabelsByNode(nodeId));
+        newLabels.addAll(labels);
+        // we don't allow number of labels on a node > 1 after added labels
+        if (newLabels.size() > 1) {
+          String msg =
+              String.format(
+                      "%d labels specified on host=%s after add labels to node"
+                          + ", please note that we do not support specifying multiple"
+                          + " labels on a single host for now.",
+                      newLabels.size(), nodeId.getHost());
+          LOG.error(msg);
+          throw new IOException(msg);
+        }
+      }
     }
   }
   
@@ -620,11 +642,24 @@ public class CommonNodeLabelsManager extends AbstractService {
     // check all labels being added existed
     Set<String> knownLabels = labelCollections.keySet();
     for (Entry<NodeId, Set<String>> entry : replaceLabelsToNode.entrySet()) {
-      if (!knownLabels.containsAll(entry.getValue())) {
+      NodeId nodeId = entry.getKey();
+      Set<String> labels = entry.getValue();
+      
+      // As in YARN-2694, we disable user add more than 1 labels on a same host
+      if (labels.size() > 1) {
+        String msg = String.format("%d labels specified on host=%s"
+            + ", please note that we do not support specifying multiple"
+            + " labels on a single host for now.", labels.size(),
+            nodeId.getHost());
+        LOG.error(msg);
+        throw new IOException(msg);
+      }
+      
+      if (!knownLabels.containsAll(labels)) {
         String msg =
             "Not all labels being replaced contained by known "
                 + "label collections, please check" + ", new labels=["
-                + StringUtils.join(entry.getValue(), ",") + "]";
+                + StringUtils.join(labels, ",") + "]";
         LOG.error(msg);
         throw new IOException(msg);
       }

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/nodelabels/TestCommonNodeLabelsManager.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/nodelabels/TestCommonNodeLabelsManager.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/nodelabels/TestCommonNodeLabelsManager.java
index 11a2621..d05c75c 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/nodelabels/TestCommonNodeLabelsManager.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/nodelabels/TestCommonNodeLabelsManager.java
@@ -227,19 +227,17 @@ public class TestCommonNodeLabelsManager extends NodeLabelTestBase {
         ImmutableMap.of(toNodeId("n1"), CommonNodeLabelsManager.EMPTY_STRING_SET));
 
     // add label on node
-    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p1"),
-        toNodeId("n2"), toSet("p2")));
+    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p1")));
     assertMapEquals(
         mgr.getNodeLabels(),
         ImmutableMap.of(toNodeId("n1"), toSet("p1"), toNodeId("n2"),
-            toSet("p2", "p3"), toNodeId("n3"), toSet("p3")));
+            toSet("p3"), toNodeId("n3"), toSet("p3")));
     assertMapEquals(mgr.lastNodeToLabels,
-        ImmutableMap.of(toNodeId("n1"), toSet("p1"), toNodeId("n2"),
-            toSet("p2", "p3")));
+        ImmutableMap.of(toNodeId("n1"), toSet("p1")));
 
     // remove labels on node
     mgr.removeLabelsFromNode(ImmutableMap.of(toNodeId("n1"), toSet("p1"),
-        toNodeId("n2"), toSet("p2", "p3"), toNodeId("n3"), toSet("p3")));
+        toNodeId("n2"), toSet("p3"), toNodeId("n3"), toSet("p3")));
     Assert.assertEquals(0, mgr.getNodeLabels().size());
     assertMapEquals(mgr.lastNodeToLabels, ImmutableMap.of(toNodeId("n1"),
         CommonNodeLabelsManager.EMPTY_STRING_SET, toNodeId("n2"),
@@ -276,10 +274,10 @@ public class TestCommonNodeLabelsManager extends NodeLabelTestBase {
   @Test(timeout = 5000) 
   public void testTrimLabelsWhenModifyLabelsOnNodes() throws IOException {
     mgr.addToCluserNodeLabels(toSet(" p1", "p2"));
-    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p1 ", "p2")));
+    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p1 ")));
     assertMapEquals(
         mgr.getNodeLabels(),
-        ImmutableMap.of(toNodeId("n1"), toSet("p1", "p2")));
+        ImmutableMap.of(toNodeId("n1"), toSet("p1")));
     mgr.replaceLabelsOnNode(ImmutableMap.of(toNodeId("n1"), toSet(" p2")));
     assertMapEquals(
         mgr.getNodeLabels(),
@@ -292,16 +290,16 @@ public class TestCommonNodeLabelsManager extends NodeLabelTestBase {
   public void testReplaceLabelsOnHostsShouldUpdateNodesBelongTo()
       throws IOException {
     mgr.addToCluserNodeLabels(toSet("p1", "p2", "p3"));
-    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p1", "p2")));
+    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p1")));
     assertMapEquals(
         mgr.getNodeLabels(),
-        ImmutableMap.of(toNodeId("n1"), toSet("p1", "p2")));
+        ImmutableMap.of(toNodeId("n1"), toSet("p1")));
     
     // Replace labels on n1:1 to P2
     mgr.replaceLabelsOnNode(ImmutableMap.of(toNodeId("n1:1"), toSet("p2"),
         toNodeId("n1:2"), toSet("p2")));
     assertMapEquals(mgr.getNodeLabels(), ImmutableMap.of(toNodeId("n1"),
-        toSet("p1", "p2"), toNodeId("n1:1"), toSet("p2"), toNodeId("n1:2"),
+        toSet("p1"), toNodeId("n1:1"), toSet("p2"), toNodeId("n1:2"),
         toSet("p2")));
     
     // Replace labels on n1 to P1, both n1:1/n1 will be P1 now
@@ -312,17 +310,6 @@ public class TestCommonNodeLabelsManager extends NodeLabelTestBase {
     
     // Set labels on n1:1 to P2 again to verify if add/remove works
     mgr.replaceLabelsOnNode(ImmutableMap.of(toNodeId("n1:1"), toSet("p2")));
-    // Add p3 to n1, should makes n1:1 to be p2/p3, and n1:2 to be p1/p3
-    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p3")));
-    assertMapEquals(mgr.getNodeLabels(), ImmutableMap.of(toNodeId("n1"),
-        toSet("p1", "p3"), toNodeId("n1:1"), toSet("p2", "p3"),
-        toNodeId("n1:2"), toSet("p1", "p3")));
-    
-    // Remove P3 from n1, should makes n1:1 to be p2, and n1:2 to be p1
-    mgr.removeLabelsFromNode(ImmutableMap.of(toNodeId("n1"), toSet("p3")));
-    assertMapEquals(mgr.getNodeLabels(), ImmutableMap.of(toNodeId("n1"),
-        toSet("p1"), toNodeId("n1:1"), toSet("p2"), toNodeId("n1:2"),
-        toSet("p1")));
   }
 
   private void assertNodeLabelsDisabledErrorMessage(IOException e) {
@@ -404,13 +391,12 @@ public class TestCommonNodeLabelsManager extends NodeLabelTestBase {
   public void testLabelsToNodes()
       throws IOException {
     mgr.addToCluserNodeLabels(toSet("p1", "p2", "p3"));
-    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p1", "p2")));
+    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p1")));
     Map<String, Set<NodeId>> labelsToNodes = mgr.getLabelsToNodes();
     assertLabelsToNodesEquals(
         labelsToNodes,
         ImmutableMap.of(
-        "p1", toSet(toNodeId("n1")),
-        "p2",toSet(toNodeId("n1"))));
+        "p1", toSet(toNodeId("n1"))));
     assertLabelsToNodesEquals(
         labelsToNodes, transposeNodeToLabels(mgr.getNodeLabels()));
 
@@ -422,7 +408,7 @@ public class TestCommonNodeLabelsManager extends NodeLabelTestBase {
         labelsToNodes,
         ImmutableMap.of(
         "p1", toSet(toNodeId("n1")),
-        "p2", toSet(toNodeId("n1"),toNodeId("n1:1"),toNodeId("n1:2"))));
+        "p2", toSet(toNodeId("n1:1"),toNodeId("n1:2"))));
     assertLabelsToNodesEquals(
         labelsToNodes, transposeNodeToLabels(mgr.getNodeLabels()));
 
@@ -439,19 +425,19 @@ public class TestCommonNodeLabelsManager extends NodeLabelTestBase {
     // Set labels on n1:1 to P2 again to verify if add/remove works
     mgr.replaceLabelsOnNode(ImmutableMap.of(toNodeId("n1:1"), toSet("p2")));
     // Add p3 to n1, should makes n1:1 to be p2/p3, and n1:2 to be p1/p3
-    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p3")));
+    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n2"), toSet("p3")));
     labelsToNodes = mgr.getLabelsToNodes();
     assertLabelsToNodesEquals(
         labelsToNodes,
         ImmutableMap.of(
         "p1", toSet(toNodeId("n1"),toNodeId("n1:2")),
         "p2", toSet(toNodeId("n1:1")),
-        "p3", toSet(toNodeId("n1"),toNodeId("n1:1"),toNodeId("n1:2"))));
+        "p3", toSet(toNodeId("n2"))));
     assertLabelsToNodesEquals(
         labelsToNodes, transposeNodeToLabels(mgr.getNodeLabels()));
 
     // Remove P3 from n1, should makes n1:1 to be p2, and n1:2 to be p1
-    mgr.removeLabelsFromNode(ImmutableMap.of(toNodeId("n1"), toSet("p3")));
+    mgr.removeLabelsFromNode(ImmutableMap.of(toNodeId("n2"), toSet("p3")));
     labelsToNodes = mgr.getLabelsToNodes();
     assertLabelsToNodesEquals(
         labelsToNodes,
@@ -468,14 +454,14 @@ public class TestCommonNodeLabelsManager extends NodeLabelTestBase {
     mgr.addToCluserNodeLabels(toSet("p1", "p2", "p3"));
     mgr.addLabelsToNode(
         ImmutableMap.of(
-        toNodeId("n1:1"), toSet("p1", "p2"),
-        toNodeId("n1:2"), toSet("p1", "p2")));
+        toNodeId("n1:1"), toSet("p1"),
+        toNodeId("n1:2"), toSet("p2")));
     Set<String> setlabels =
         new HashSet<String>(Arrays.asList(new String[]{"p1"}));
     assertLabelsToNodesEquals(mgr.getLabelsToNodes(setlabels),
-        ImmutableMap.of("p1", toSet(toNodeId("n1:1"),toNodeId("n1:2"))));
+        ImmutableMap.of("p1", toSet(toNodeId("n1:1"))));
 
-    // Replace labels on n1:1 to P2
+    // Replace labels on n1:1 to P3
     mgr.replaceLabelsOnNode(ImmutableMap.of(toNodeId("n1"), toSet("p3")));
     assertTrue(mgr.getLabelsToNodes(setlabels).isEmpty());
     setlabels = new HashSet<String>(Arrays.asList(new String[]{"p2", "p3"}));
@@ -484,11 +470,11 @@ public class TestCommonNodeLabelsManager extends NodeLabelTestBase {
         ImmutableMap.of(
         "p3", toSet(toNodeId("n1"), toNodeId("n1:1"),toNodeId("n1:2"))));
 
-    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1:3"), toSet("p1", "p2")));
+    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n2"), toSet("p2")));
     assertLabelsToNodesEquals(
         mgr.getLabelsToNodes(setlabels),
         ImmutableMap.of(
-        "p2", toSet(toNodeId("n1:3")),
+        "p2", toSet(toNodeId("n2")),
         "p3", toSet(toNodeId("n1"), toNodeId("n1:1"),toNodeId("n1:2"))));
 
     mgr.removeLabelsFromNode(ImmutableMap.of(toNodeId("n1"), toSet("p3")));
@@ -497,25 +483,57 @@ public class TestCommonNodeLabelsManager extends NodeLabelTestBase {
     assertLabelsToNodesEquals(
         mgr.getLabelsToNodes(setlabels),
         ImmutableMap.of(
-        "p1", toSet(toNodeId("n1:3")),
-        "p2", toSet(toNodeId("n1:3"))));
+        "p2", toSet(toNodeId("n2"))));
 
-    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n2:2"), toSet("p1", "p2")));
+    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n3"), toSet("p1")));
     assertLabelsToNodesEquals(
         mgr.getLabelsToNodes(setlabels),
         ImmutableMap.of(
-        "p1", toSet(toNodeId("n1:3"), toNodeId("n2:2")),
-        "p2", toSet(toNodeId("n1:3"), toNodeId("n2:2"))));
+        "p1", toSet(toNodeId("n3")),
+        "p2", toSet(toNodeId("n2"))));
 
     mgr.replaceLabelsOnNode(ImmutableMap.of(toNodeId("n2:2"), toSet("p3")));
     assertLabelsToNodesEquals(
         mgr.getLabelsToNodes(setlabels),
         ImmutableMap.of(
-        "p1", toSet(toNodeId("n1:3")),
-        "p2", toSet(toNodeId("n1:3")),
+        "p1", toSet(toNodeId("n3")),
+        "p2", toSet(toNodeId("n2")),
         "p3", toSet(toNodeId("n2:2"))));
     setlabels = new HashSet<String>(Arrays.asList(new String[]{"p1"}));
     assertLabelsToNodesEquals(mgr.getLabelsToNodes(setlabels),
-        ImmutableMap.of("p1", toSet(toNodeId("n1:3"))));
+        ImmutableMap.of("p1", toSet(toNodeId("n3"))));
+  }
+
+  @Test(timeout = 5000)
+  public void testNoMoreThanOneLabelExistedInOneHost() throws IOException {
+    boolean failed = false;
+    // As in YARN-2694, we temporarily disable no more than one label existed in
+    // one host
+    mgr.addToCluserNodeLabels(toSet("p1", "p2", "p3"));
+    try {
+      mgr.replaceLabelsOnNode(ImmutableMap.of(toNodeId("n1"), toSet("p1", "p2")));
+    } catch (IOException e) {
+      failed = true;
+    }
+    Assert.assertTrue("Should failed when set > 1 labels on a host", failed);
+
+    try {
+      mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p1", "p2")));
+    } catch (IOException e) {
+      failed = true;
+    }
+    Assert.assertTrue("Should failed when add > 1 labels on a host", failed);
+
+    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p1")));
+    // add a same label to a node, #labels in this node is still 1, shouldn't
+    // fail
+    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p1")));
+    try {
+      mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p2")));
+    } catch (IOException e) {
+      failed = true;
+    }
+    Assert.assertTrue("Should failed when #labels > 1 on a host after add",
+        failed);
   }
 }

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ApplicationMasterService.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ApplicationMasterService.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ApplicationMasterService.java
index 0cdc1e2..6650cf2 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ApplicationMasterService.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ApplicationMasterService.java
@@ -488,10 +488,11 @@ public class ApplicationMasterService extends AbstractService implements
       RMApp app =
           this.rmContext.getRMApps().get(applicationId);
       
-      // set label expression for Resource Requests
+      // set label expression for Resource Requests if resourceName=ANY 
       ApplicationSubmissionContext asc = app.getApplicationSubmissionContext();
       for (ResourceRequest req : ask) {
-        if (null == req.getNodeLabelExpression()) {
+        if (null == req.getNodeLabelExpression()
+            && ResourceRequest.ANY.equals(req.getResourceName())) {
           req.setNodeLabelExpression(asc.getNodeLabelExpression());
         }
       }

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerUtils.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerUtils.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerUtils.java
index 5d00009..c4900c3 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerUtils.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerUtils.java
@@ -231,11 +231,31 @@ public class SchedulerUtils {
     
     // if queue has default label expression, and RR doesn't have, use the
     // default label expression of queue
-    if (labelExp == null && queueInfo != null) {
+    if (labelExp == null && queueInfo != null
+        && ResourceRequest.ANY.equals(resReq.getResourceName())) {
       labelExp = queueInfo.getDefaultNodeLabelExpression();
       resReq.setNodeLabelExpression(labelExp);
     }
     
+    // we don't allow specify label expression other than resourceName=ANY now
+    if (!ResourceRequest.ANY.equals(resReq.getResourceName())
+        && labelExp != null && !labelExp.trim().isEmpty()) {
+      throw new InvalidResourceRequestException(
+          "Invailid resource request, queue=" + queueInfo.getQueueName()
+              + " specified node label expression in a "
+              + "resource request has resource name = "
+              + resReq.getResourceName());
+    }
+    
+    // we don't allow specify label expression with more than one node labels now
+    if (labelExp != null && labelExp.contains("&&")) {
+      throw new InvalidResourceRequestException(
+          "Invailid resource request, queue=" + queueInfo.getQueueName()
+              + " specified more than one node label "
+              + "in a node label expression, node label expression = "
+              + labelExp);
+    }
+    
     if (labelExp != null && !labelExp.trim().isEmpty() && queueInfo != null) {
       if (!checkQueueLabelExpression(queueInfo.getAccessibleNodeLabels(),
           labelExp)) {

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/MockAM.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/MockAM.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/MockAM.java
index e2e3cc1..a3968f8 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/MockAM.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/MockAM.java
@@ -165,12 +165,17 @@ public class MockAM {
       int containers, String labelExpression) throws Exception {
     List<ResourceRequest> reqs = new ArrayList<ResourceRequest>();
     for (String host : hosts) {
-      ResourceRequest hostReq = createResourceReq(host, memory, priority,
-          containers, labelExpression);
-      reqs.add(hostReq);
-      ResourceRequest rackReq = createResourceReq("/default-rack", memory,
-          priority, containers, labelExpression);
-      reqs.add(rackReq);
+      // only add host/rack request when asked host isn't ANY
+      if (!host.equals(ResourceRequest.ANY)) {
+        ResourceRequest hostReq =
+            createResourceReq(host, memory, priority, containers,
+                labelExpression);
+        reqs.add(hostReq);
+        ResourceRequest rackReq =
+            createResourceReq("/default-rack", memory, priority, containers,
+                labelExpression);
+        reqs.add(rackReq);
+      }
     }
 
     ResourceRequest offRackReq = createResourceReq(ResourceRequest.ANY, memory,

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRMRestart.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRMRestart.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRMRestart.java
index fc419ac..4caf7e3 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRMRestart.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRMRestart.java
@@ -2104,7 +2104,7 @@ public class TestRMRestart extends ParameterizedSchedulerTestBase {
     nodeLabelManager.removeFromClusterNodeLabels(toSet("z"));
     
     // Replace nodelabel h1->x,y
-    nodeLabelManager.replaceLabelsOnNode(ImmutableMap.of(n1, toSet("x", "y")));
+    nodeLabelManager.replaceLabelsOnNode(ImmutableMap.of(n1, toSet("y")));
 
     // Wait for updating store.It is expected NodeStore update should happen
     // very fast since it has separate dispatcher. So waiting for max 5 seconds,
@@ -2122,7 +2122,7 @@ public class TestRMRestart extends ParameterizedSchedulerTestBase {
 
     Map<NodeId, Set<String>> nodeLabels = nodeLabelManager.getNodeLabels();
     Assert.assertEquals(1, nodeLabelManager.getNodeLabels().size());
-    Assert.assertTrue(nodeLabels.get(n1).equals(toSet("x", "y")));
+    Assert.assertTrue(nodeLabels.get(n1).equals(toSet("y")));
 
     MockRM rm2 = new MockRM(conf, memStore) {
       @Override
@@ -2141,7 +2141,7 @@ public class TestRMRestart extends ParameterizedSchedulerTestBase {
 
     nodeLabels = nodeLabelManager.getNodeLabels();
     Assert.assertEquals(1, nodeLabelManager.getNodeLabels().size());
-    Assert.assertTrue(nodeLabels.get(n1).equals(toSet("x", "y")));
+    Assert.assertTrue(nodeLabels.get(n1).equals(toSet("y")));
     rm1.stop();
     rm2.stop();
   }

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/nodelabels/TestRMNodeLabelsManager.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/nodelabels/TestRMNodeLabelsManager.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/nodelabels/TestRMNodeLabelsManager.java
index 3505866..a91947f 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/nodelabels/TestRMNodeLabelsManager.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/nodelabels/TestRMNodeLabelsManager.java
@@ -211,16 +211,14 @@ public class TestRMNodeLabelsManager extends NodeLabelTestBase {
     
     /*
      * Node->Labels:
-     *   host1 : red, blue
-     *   host2 : blue, yellow
+     *   host1 : red
+     *   host2 : blue
      *   host3 : yellow
      *   host4 :
      */
     mgr.addToCluserNodeLabels(toSet("red", "blue", "yellow"));
-    mgr.replaceLabelsOnNode(ImmutableMap.of(toNodeId("host1"),
-        toSet("red", "blue")));
-    mgr.replaceLabelsOnNode(ImmutableMap.of(toNodeId("host2"),
-        toSet("blue", "yellow")));
+    mgr.replaceLabelsOnNode(ImmutableMap.of(toNodeId("host1"), toSet("red")));
+    mgr.replaceLabelsOnNode(ImmutableMap.of(toNodeId("host2"), toSet("blue")));
     mgr.replaceLabelsOnNode(ImmutableMap.of(toNodeId("host3"), toSet("yellow")));
     
     // active two NM to n1, one large and one small
@@ -248,31 +246,29 @@ public class TestRMNodeLabelsManager extends NodeLabelTestBase {
     // check resource
     Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
         mgr.getQueueResource("Q1", q1Label, clusterResource));
-    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 4),
-        mgr.getQueueResource("Q2", q2Label, clusterResource));
     Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
+        mgr.getQueueResource("Q2", q2Label, clusterResource));
+    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 2),
         mgr.getQueueResource("Q3", q3Label, clusterResource));
     Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 1),
         mgr.getQueueResource("Q4", q4Label, clusterResource));
     Assert.assertEquals(clusterResource,
         mgr.getQueueResource("Q5", q5Label, clusterResource));
     
-    mgr.removeLabelsFromNode(ImmutableMap.of(toNodeId("host1"), toSet("red"),
-        toNodeId("host2"), toSet("blue", "yellow")));
-    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("host3"), toSet("red")));
+    mgr.removeLabelsFromNode(ImmutableMap.of(toNodeId("host2"), toSet("blue")));
     /*
      * Check resource after changes some labels
      * Node->Labels:
-     *   host1 : blue (was: red, blue)
-     *   host2 : (was: blue, yellow)
-     *   host3 : red, yellow (was: yellow)
+     *   host1 : red
+     *   host2 : (was: blue)
+     *   host3 : yellow
      *   host4 :
      */
     
     // check resource
-    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 4),
+    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
         mgr.getQueueResource("Q1", q1Label, clusterResource));
-    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 4),
+    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
         mgr.getQueueResource("Q2", q2Label, clusterResource));
     Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
         mgr.getQueueResource("Q3", q3Label, clusterResource));
@@ -284,9 +280,9 @@ public class TestRMNodeLabelsManager extends NodeLabelTestBase {
     /*
      * Check resource after deactive/active some nodes 
      * Node->Labels:
-     *   (deactived) host1 : blue
+     *   (deactived) host1 : red
      *   host2 :
-     *   (deactived and then actived) host3 : red, yellow
+     *   (deactived and then actived) host3 : yellow
      *   host4 :
      */
     mgr.deactivateNode(NodeId.newInstance("host1", 1));
@@ -294,7 +290,7 @@ public class TestRMNodeLabelsManager extends NodeLabelTestBase {
     mgr.activateNode(NodeId.newInstance("host3", 1), SMALL_RESOURCE);
     
     // check resource
-    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
+    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 2),
         mgr.getQueueResource("Q1", q1Label, clusterResource));
     Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
         mgr.getQueueResource("Q2", q2Label, clusterResource));
@@ -331,9 +327,9 @@ public class TestRMNodeLabelsManager extends NodeLabelTestBase {
     // check resource
     Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 2),
         mgr.getQueueResource("Q1", q1Label, clusterResource));
-    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
+    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 2),
         mgr.getQueueResource("Q2", q2Label, clusterResource));
-    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
+    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 2),
         mgr.getQueueResource("Q3", q3Label, clusterResource));
     Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 2),
         mgr.getQueueResource("Q4", q4Label, clusterResource));
@@ -344,7 +340,7 @@ public class TestRMNodeLabelsManager extends NodeLabelTestBase {
      * Active NMs in nodes already have NM
      * Node->Labels:
      *   host2 :
-     *   host3 : red, yellow (3 NMs)
+     *   host3 : yellow (3 NMs)
      *   host4 : (2 NMs)
      */
     mgr.activateNode(NodeId.newInstance("host3", 2), SMALL_RESOURCE);
@@ -354,9 +350,9 @@ public class TestRMNodeLabelsManager extends NodeLabelTestBase {
     // check resource
     Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
         mgr.getQueueResource("Q1", q1Label, clusterResource));
-    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 6),
+    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
         mgr.getQueueResource("Q2", q2Label, clusterResource));
-    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 6),
+    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
         mgr.getQueueResource("Q3", q3Label, clusterResource));
     Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
         mgr.getQueueResource("Q4", q4Label, clusterResource));
@@ -367,7 +363,7 @@ public class TestRMNodeLabelsManager extends NodeLabelTestBase {
      * Deactive NMs in nodes already have NMs
      * Node->Labels:
      *   host2 :
-     *   host3 : red, yellow (2 NMs)
+     *   host3 : yellow (2 NMs)
      *   host4 : (0 NMs)
      */
     mgr.deactivateNode(NodeId.newInstance("host3", 3));
@@ -377,9 +373,9 @@ public class TestRMNodeLabelsManager extends NodeLabelTestBase {
     // check resource
     Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 1),
         mgr.getQueueResource("Q1", q1Label, clusterResource));
-    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
+    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 1),
         mgr.getQueueResource("Q2", q2Label, clusterResource));
-    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 3),
+    Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 1),
         mgr.getQueueResource("Q3", q3Label, clusterResource));
     Assert.assertEquals(Resources.multiply(SMALL_RESOURCE, 1),
         mgr.getQueueResource("Q4", q4Label, clusterResource));

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestSchedulerUtils.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestSchedulerUtils.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestSchedulerUtils.java
index c9e81ee..6e2b56f 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestSchedulerUtils.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestSchedulerUtils.java
@@ -62,6 +62,8 @@ import org.apache.hadoop.yarn.event.EventHandler;
 import org.apache.hadoop.yarn.exceptions.InvalidResourceBlacklistRequestException;
 import org.apache.hadoop.yarn.exceptions.InvalidResourceRequestException;
 import org.apache.hadoop.yarn.ipc.YarnRPC;
+import org.apache.hadoop.yarn.nodelabels.CommonNodeLabelsManager;
+import org.apache.hadoop.yarn.nodelabels.NodeLabelsStore;
 import org.apache.hadoop.yarn.server.resourcemanager.MockNM;
 import org.apache.hadoop.yarn.server.resourcemanager.TestAMAuthorization.MockRMWithAMS;
 import org.apache.hadoop.yarn.server.resourcemanager.TestAMAuthorization.MyContainerManager;
@@ -213,11 +215,7 @@ public class TestSchedulerUtils {
       resReq.setNodeLabelExpression("x");
       SchedulerUtils.validateResourceRequest(resReq, maxResource, "queue",
           scheduler);
-      
-      resReq.setNodeLabelExpression("x && y");
-      SchedulerUtils.validateResourceRequest(resReq, maxResource, "queue",
-          scheduler);
-      
+
       resReq.setNodeLabelExpression("y");
       SchedulerUtils.validateResourceRequest(resReq, maxResource, "queue",
           scheduler);
@@ -252,6 +250,8 @@ public class TestSchedulerUtils {
     } catch (InvalidResourceRequestException e) {
     }
     
+    // we don't allow specify more than two node labels in a single expression
+    // now
     try {
       // set queue accessible node labesl to [x, y]
       queueAccessibleNodeLabels.clear();
@@ -262,7 +262,7 @@ public class TestSchedulerUtils {
           YarnConfiguration.DEFAULT_RM_SCHEDULER_MINIMUM_ALLOCATION_VCORES);
       ResourceRequest resReq = BuilderUtils.newResourceRequest(
           mock(Priority.class), ResourceRequest.ANY, resource, 1);
-      resReq.setNodeLabelExpression("x && y && z");
+      resReq.setNodeLabelExpression("x && y");
       SchedulerUtils.validateResourceRequest(resReq, maxResource, "queue",
           scheduler);
       fail("Should fail");
@@ -327,7 +327,7 @@ public class TestSchedulerUtils {
       SchedulerUtils.validateResourceRequest(resReq, maxResource, "queue",
           scheduler);
       
-      resReq.setNodeLabelExpression("x && y && z");
+      resReq.setNodeLabelExpression("y");
       SchedulerUtils.validateResourceRequest(resReq, maxResource, "queue",
           scheduler);
       
@@ -336,7 +336,45 @@ public class TestSchedulerUtils {
           scheduler);
     } catch (InvalidResourceRequestException e) {
       e.printStackTrace();
-      fail("Should be valid when request labels is empty");
+      fail("Should be valid when queue can access any labels");
+    }
+    
+    // we don't allow resource name other than ANY and specify label
+    try {
+      // set queue accessible node labesl to [x, y]
+      queueAccessibleNodeLabels.clear();
+      queueAccessibleNodeLabels.addAll(Arrays.asList("x", "y"));
+      
+      Resource resource = Resources.createResource(
+          0,
+          YarnConfiguration.DEFAULT_RM_SCHEDULER_MINIMUM_ALLOCATION_VCORES);
+      ResourceRequest resReq = BuilderUtils.newResourceRequest(
+          mock(Priority.class), "rack", resource, 1);
+      resReq.setNodeLabelExpression("x");
+      SchedulerUtils.validateResourceRequest(resReq, maxResource, "queue",
+          scheduler);
+      fail("Should fail");
+    } catch (InvalidResourceRequestException e) {
+    }
+    
+    // we don't allow resource name other than ANY and specify label even if
+    // queue has accessible label = *
+    try {
+      // set queue accessible node labesl to *
+      queueAccessibleNodeLabels.clear();
+      queueAccessibleNodeLabels.addAll(Arrays
+          .asList(CommonNodeLabelsManager.ANY));
+      
+      Resource resource = Resources.createResource(
+          0,
+          YarnConfiguration.DEFAULT_RM_SCHEDULER_MINIMUM_ALLOCATION_VCORES);
+      ResourceRequest resReq = BuilderUtils.newResourceRequest(
+          mock(Priority.class), "rack", resource, 1);
+      resReq.setNodeLabelExpression("x");
+      SchedulerUtils.validateResourceRequest(resReq, maxResource, "queue",
+          scheduler);
+      fail("Should fail");
+    } catch (InvalidResourceRequestException e) {
     }
   }
 

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestContainerAllocation.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestContainerAllocation.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestContainerAllocation.java
index 674096e..169517d 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestContainerAllocation.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestContainerAllocation.java
@@ -87,6 +87,7 @@ public class TestContainerAllocation {
 
   @Test(timeout = 3000000)
   public void testExcessReservationThanNodeManagerCapacity() throws Exception {
+    @SuppressWarnings("resource")
     MockRM rm = new MockRM(conf);
     rm.start();
 
@@ -393,6 +394,7 @@ public class TestContainerAllocation {
     }
   }
   
+  @SuppressWarnings("unchecked")
   private <E> Set<E> toSet(E... elements) {
     Set<E> set = Sets.newHashSet(elements);
     return set;
@@ -449,7 +451,7 @@ public class TestContainerAllocation {
     return conf;
   }
   
-  @Test(timeout = 300000)
+  @Test (timeout = 300000)
   public void testContainerAllocationWithSingleUserLimits() throws Exception {
     final RMNodeLabelsManager mgr = new NullRMNodeLabelsManager();
     mgr.init(conf);
@@ -470,7 +472,7 @@ public class TestContainerAllocation {
     rm1.getRMContext().setNodeLabelManager(mgr);
     rm1.start();
     MockNM nm1 = rm1.registerNode("h1:1234", 8000); // label = x
-    MockNM nm2 = rm1.registerNode("h2:1234", 8000); // label = y
+    rm1.registerNode("h2:1234", 8000); // label = y
     MockNM nm3 = rm1.registerNode("h3:1234", 8000); // label = <empty>
 
     // launch an app to queue a1 (label = x), and check all container will
@@ -518,9 +520,9 @@ public class TestContainerAllocation {
      *                           
      * Node structure:
      * h1 : x
-     * h2 : x, y
+     * h2 : y
      * h3 : y
-     * h4 : y, z
+     * h4 : z
      * h5 : NO
      * 
      * Total resource:
@@ -540,9 +542,9 @@ public class TestContainerAllocation {
     // set node -> label
     mgr.addToCluserNodeLabels(ImmutableSet.of("x", "y", "z"));
     mgr.addLabelsToNode(ImmutableMap.of(NodeId.newInstance("h1", 0),
-        toSet("x"), NodeId.newInstance("h2", 0), toSet("x", "y"),
+        toSet("x"), NodeId.newInstance("h2", 0), toSet("y"),
         NodeId.newInstance("h3", 0), toSet("y"), NodeId.newInstance("h4", 0),
-        toSet("y", "z"), NodeId.newInstance("h5", 0),
+        toSet("z"), NodeId.newInstance("h5", 0),
         RMNodeLabelsManager.EMPTY_STRING_SET));
 
     // inject node label manager
@@ -568,12 +570,10 @@ public class TestContainerAllocation {
     RMApp app1 = rm1.submitApp(1024, "app", "user", null, "a1");
     MockAM am1 = MockRM.launchAndRegisterAM(app1, rm1, nm1);
 
-    // request a container (label = x && y). can only allocate on nm2 
-    am1.allocate("*", 1024, 1, new ArrayList<ContainerId>(), "x && y");
+    // request a container (label = y). can be allocated on nm2 
+    am1.allocate("*", 1024, 1, new ArrayList<ContainerId>(), "y");
     containerId =
-        ContainerId.newContainerId(am1.getApplicationAttemptId(), 2);
-    Assert.assertFalse(rm1.waitForState(nm1, containerId,
-        RMContainerState.ALLOCATED, 10 * 1000));
+        ContainerId.newContainerId(am1.getApplicationAttemptId(), 2L);
     Assert.assertTrue(rm1.waitForState(nm2, containerId,
         RMContainerState.ALLOCATED, 10 * 1000));
     checkTaskContainersHost(am1.getApplicationAttemptId(), containerId, rm1,
@@ -609,12 +609,10 @@ public class TestContainerAllocation {
     checkTaskContainersHost(am3.getApplicationAttemptId(), containerId, rm1,
         "h3");
     
-    // try to allocate container (request label = y && z) on nm3 (label = y) and
-    // nm4 (label = y,z). Will sucessfully allocate on nm4 only.
-    am3.allocate("*", 1024, 1, new ArrayList<ContainerId>(), "y && z");
-    containerId = ContainerId.newContainerId(am3.getApplicationAttemptId(), 3);
-    Assert.assertFalse(rm1.waitForState(nm3, containerId,
-        RMContainerState.ALLOCATED, 10 * 1000));
+    // try to allocate container (request label = z) on nm4 (label = y,z). 
+    // Will successfully allocate on nm4 only.
+    am3.allocate("*", 1024, 1, new ArrayList<ContainerId>(), "z");
+    containerId = ContainerId.newContainerId(am3.getApplicationAttemptId(), 3L);
     Assert.assertTrue(rm1.waitForState(nm4, containerId,
         RMContainerState.ALLOCATED, 10 * 1000));
     checkTaskContainersHost(am3.getApplicationAttemptId(), containerId, rm1,

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c1957fef/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/TestRMWebServicesNodeLabels.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/TestRMWebServicesNodeLabels.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/TestRMWebServicesNodeLabels.java
index ae27c02..0cc576c 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/TestRMWebServicesNodeLabels.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/TestRMWebServicesNodeLabels.java
@@ -155,7 +155,7 @@ public class TestRMWebServicesNodeLabels extends JerseyTestBase {
             .path("replace-labels")
             .queryParam("user.name", userName)
             .accept(MediaType.APPLICATION_JSON)
-            .entity("{\"nodeLabels\": [\"a\", \"b\"]}",
+            .entity("{\"nodeLabels\": [\"a\"]}",
               MediaType.APPLICATION_JSON)
             .post(ClientResponse.class);
     LOG.info("posted node nodelabel");
@@ -168,8 +168,8 @@ public class TestRMWebServicesNodeLabels extends JerseyTestBase {
             .accept(MediaType.APPLICATION_JSON).get(ClientResponse.class);
     assertEquals(MediaType.APPLICATION_JSON_TYPE, response.getType());
     json = response.getEntity(JSONObject.class);
-    jarr = json.getJSONArray("nodeLabels");
-    assertEquals(2, jarr.length());
+    assertEquals("a", json.getString("nodeLabels"));
+
     
     // Replace
     response =
@@ -178,9 +178,10 @@ public class TestRMWebServicesNodeLabels extends JerseyTestBase {
             .path("replace-labels")
             .queryParam("user.name", userName)
             .accept(MediaType.APPLICATION_JSON)
-            .entity("{\"nodeLabels\":\"a\"}", MediaType.APPLICATION_JSON)
+            .entity("{\"nodeLabels\":\"b\"}", MediaType.APPLICATION_JSON)
             .post(ClientResponse.class);
     LOG.info("posted node nodelabel");
+
     // Verify
     response =
         r.path("ws").path("v1").path("cluster")
@@ -189,13 +190,12 @@ public class TestRMWebServicesNodeLabels extends JerseyTestBase {
             .accept(MediaType.APPLICATION_JSON).get(ClientResponse.class);
     assertEquals(MediaType.APPLICATION_JSON_TYPE, response.getType());
     json = response.getEntity(JSONObject.class);
-    assertEquals("a", json.getString("nodeLabels"));
+    assertEquals("b", json.getString("nodeLabels"));
             
     // Replace labels using node-to-labels
     NodeToLabelsInfo ntli = new NodeToLabelsInfo();
     NodeLabelsInfo nli = new NodeLabelsInfo();
     nli.getNodeLabels().add("a");
-    nli.getNodeLabels().add("b");
     ntli.getNodeToLabels().put("nid:0", nli);
     response =
         r.path("ws").path("v1").path("cluster")
@@ -214,9 +214,8 @@ public class TestRMWebServicesNodeLabels extends JerseyTestBase {
     assertEquals(MediaType.APPLICATION_JSON_TYPE, response.getType());
     ntli = response.getEntity(NodeToLabelsInfo.class);
     nli = ntli.getNodeToLabels().get("nid:0");
-    assertEquals(2, nli.getNodeLabels().size());
+    assertEquals(1, nli.getNodeLabels().size());
     assertTrue(nli.getNodeLabels().contains("a"));
-    assertTrue(nli.getNodeLabels().contains("b"));
     
     // Remove all
     response =
@@ -267,7 +266,7 @@ public class TestRMWebServicesNodeLabels extends JerseyTestBase {
             .path("replace-labels")
             .queryParam("user.name", notUserName)
             .accept(MediaType.APPLICATION_JSON)
-            .entity("{\"nodeLabels\": [\"a\", \"b\"]}",
+            .entity("{\"nodeLabels\": [\"b\"]}",
               MediaType.APPLICATION_JSON)
             .post(ClientResponse.class);
     // Verify


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