YARN-3686. CapacityScheduler should trim default_node_label_expression. (Sunil G via wangda)

(cherry picked from commit cdbd66be11)

hadoop-yarn-project/CHANGES.txt

@@ -526,6 +526,9 @@ Release 2.7.1 - UNRELEASED
     YARN-2238. filtering on UI sticks even if I move away from the page.
     (Jian He via xgong)
 
+    YARN-3686. CapacityScheduler should trim default_node_label_expression. 
+    (Sunil G via wangda)
+
 Release 2.7.0 - 2015-04-20
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/QueueInfoPBImpl.java

@@ -358,7 +358,7 @@ public class QueueInfoPBImpl extends QueueInfo {
   public String getDefaultNodeLabelExpression() {
     QueueInfoProtoOrBuilder p = viaProto ? proto : builder;
     return (p.hasDefaultNodeLabelExpression()) ? p
-        .getDefaultNodeLabelExpression() : null;
+        .getDefaultNodeLabelExpression().trim() : null;
   }
 
   @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ResourceRequestPBImpl.java

@@ -193,7 +193,7 @@ public class ResourceRequestPBImpl extends  ResourceRequest {
     if (!p.hasNodeLabelExpression()) {
       return null;
     }
-    return (p.getNodeLabelExpression());
+    return (p.getNodeLabelExpression().trim());
   }
 
   @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/CapacitySchedulerConfiguration.java

@@ -524,7 +524,12 @@ public class CapacitySchedulerConfiguration extends ReservationSchedulerConfigur
   }
   
   public String getDefaultNodeLabelExpression(String queue) {
-    return get(getQueuePrefix(queue) + DEFAULT_NODE_LABEL_EXPRESSION);
+    String defaultLabelExpression = get(getQueuePrefix(queue)
+        + DEFAULT_NODE_LABEL_EXPRESSION);
+    if (defaultLabelExpression == null) {
+      return null;
+    }
+    return defaultLabelExpression.trim();
   }
   
   public void setDefaultNodeLabelExpression(String queue, String exp) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestSchedulerUtils.java

@@ -694,6 +694,53 @@ public class TestSchedulerUtils {
           ApplicationId.newInstance(System.currentTimeMillis(), 1), 1), 1), "x");
     Assert.assertEquals(ContainerExitStatus.PREEMPTED, cd.getExitStatus());
   }
+  
+  @Test (timeout = 30000)
+  public void testNormalizeNodeLabelExpression()
+      throws IOException {
+    // mock queue and scheduler
+    YarnScheduler scheduler = mock(YarnScheduler.class);
+    Set<String> queueAccessibleNodeLabels = Sets.newHashSet();
+    QueueInfo queueInfo = mock(QueueInfo.class);
+    when(queueInfo.getQueueName()).thenReturn("queue");
+    when(queueInfo.getAccessibleNodeLabels()).thenReturn(queueAccessibleNodeLabels);
+    when(queueInfo.getDefaultNodeLabelExpression()).thenReturn(" x ");
+    when(scheduler.getQueueInfo(any(String.class), anyBoolean(), anyBoolean()))
+        .thenReturn(queueInfo);
+    
+    Resource maxResource = Resources.createResource(
+        YarnConfiguration.DEFAULT_RM_SCHEDULER_MAXIMUM_ALLOCATION_MB,
+        YarnConfiguration.DEFAULT_RM_SCHEDULER_MAXIMUM_ALLOCATION_VCORES);
+
+    // queue has labels, success cases
+    try {
+      // set queue accessible node labels to [x, y]
+      queueAccessibleNodeLabels.clear();
+      queueAccessibleNodeLabels.addAll(Arrays.asList("x", "y"));
+      rmContext.getNodeLabelManager().addToCluserNodeLabels(
+          ImmutableSet.of(NodeLabel.newInstance("x"),
+              NodeLabel.newInstance("y")));
+      Resource resource = Resources.createResource(
+          0,
+          YarnConfiguration.DEFAULT_RM_SCHEDULER_MINIMUM_ALLOCATION_VCORES);
+      ResourceRequest resReq = BuilderUtils.newResourceRequest(
+          mock(Priority.class), ResourceRequest.ANY, resource, 1);
+      SchedulerUtils.normalizeAndvalidateRequest(resReq, maxResource, "queue",
+          scheduler, rmContext);
+      Assert.assertTrue(resReq.getNodeLabelExpression().equals("x"));
+      
+      resReq.setNodeLabelExpression(" y ");
+      SchedulerUtils.normalizeAndvalidateRequest(resReq, maxResource, "queue",
+          scheduler, rmContext);
+      Assert.assertTrue(resReq.getNodeLabelExpression().equals("y"));
+    } catch (InvalidResourceRequestException e) {
+      e.printStackTrace();
+      fail("Should be valid when request labels is a subset of queue labels");
+    } finally {
+      rmContext.getNodeLabelManager().removeFromClusterNodeLabels(
+          Arrays.asList("x", "y"));
+    }
+  }
 
   public static SchedulerApplication<SchedulerApplicationAttempt>
       verifyAppAddedAndRemovedFromScheduler(

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestCapacityScheduler.java

@@ -2930,6 +2930,27 @@ public class TestCapacityScheduler {
 
     rm.stop();
   }
+  
+  @Test
+  public void testDefaultNodeLabelExpressionQueueConfig() throws Exception {
+    CapacityScheduler cs = new CapacityScheduler();
+    CapacitySchedulerConfiguration conf = new CapacitySchedulerConfiguration();
+    setupQueueConfiguration(conf);
+    conf.setDefaultNodeLabelExpression("root.a", " x");
+    conf.setDefaultNodeLabelExpression("root.b", " y ");
+    cs.setConf(new YarnConfiguration());
+    cs.setRMContext(resourceManager.getRMContext());
+    cs.init(conf);
+    cs.start();
+
+    QueueInfo queueInfoA = cs.getQueueInfo("a", true, false);
+    Assert.assertEquals(queueInfoA.getQueueName(), "a");
+    Assert.assertEquals(queueInfoA.getDefaultNodeLabelExpression(), "x");
+
+    QueueInfo queueInfoB = cs.getQueueInfo("b", true, false);
+    Assert.assertEquals(queueInfoB.getQueueName(), "b");
+    Assert.assertEquals(queueInfoB.getDefaultNodeLabelExpression(), "y");
+  }
 
   private void setMaxAllocMb(Configuration conf, int maxAllocMb) {
     conf.setInt(YarnConfiguration.RM_SCHEDULER_MAXIMUM_ALLOCATION_MB,