YARN-3241. FairScheduler handles invalid queue names inconsistently. (Zhihai Xu via kasha)

hadoop-yarn-project/CHANGES.txt

@@ -94,6 +94,9 @@ Release 2.8.0 - UNRELEASED
     YARN-3269. Yarn.nodemanager.remote-app-log-dir could not be configured to 
     fully qualified path. (Xuan Gong via junping_du)
 
+    YARN-3241. FairScheduler handles "invalid" queue names inconsistently. 
+    (Zhihai Xu via kasha)
+
 Release 2.7.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/AllocationFileLoaderService.java

@@ -426,13 +426,19 @@ public class AllocationFileLoaderService extends AbstractService {
       Map<FSQueueType, Set<String>> configuredQueues,
       Set<String> reservableQueues)
       throws AllocationConfigurationException {
-    String queueName = element.getAttribute("name");
+    String queueName = element.getAttribute("name").trim();
 
     if (queueName.contains(".")) {
       throw new AllocationConfigurationException("Bad fair scheduler config "
           + "file: queue name (" + queueName + ") shouldn't contain period.");
     }
 
+    if (queueName.isEmpty()) {
+      throw new AllocationConfigurationException("Bad fair scheduler config "
+          + "file: queue name shouldn't be empty or "
+          + "consist only of whitespace.");
+    }
+
     if (parentName != null) {
       queueName = parentName + "." + queueName;
     }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FairScheduler.java

@@ -701,6 +701,8 @@ public class FairScheduler extends
           appRejectMsg = queueName + " is not a leaf queue";
         }
       }
+    } catch (InvalidQueueNameException qne) {
+      appRejectMsg = qne.getMessage();
     } catch (IOException ioe) {
       appRejectMsg = "Error assigning app to queue " + queueName;
     }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/InvalidQueueNameException.java

@@ -0,0 +1,39 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair;
+
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+import org.apache.hadoop.classification.InterfaceStability.Unstable;
+
+/**
+ * Thrown when Queue Name is malformed.
+ */
+@Private
+@Unstable
+public class InvalidQueueNameException extends IllegalArgumentException {
+  private static final long serialVersionUID = -7306320927804540011L;
+
+  public InvalidQueueNameException(String message) {
+    super(message);
+  }
+
+  public InvalidQueueNameException(String message, Throwable t) {
+    super(message, t);
+  }
+}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/QueueManager.java

@@ -36,6 +36,7 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.xml.sax.SAXException;
 
+import com.google.common.annotations.VisibleForTesting;
 /**
  * Maintains a list of queues as well as scheduling parameters for each queue,
  * such as guaranteed share allocations, from the fair scheduler config file.
@@ -155,7 +156,13 @@ public class QueueManager {
 
     // Move up the queue tree until we reach one that exists.
     while (sepIndex != -1) {
+      int prevSepIndex = sepIndex;
       sepIndex = name.lastIndexOf('.', sepIndex-1);
+      String node = name.substring(sepIndex+1, prevSepIndex);
+      if (!isQueueNameValid(node)) {
+        throw new InvalidQueueNameException("Illegal node name at offset " +
+            (sepIndex+1) + " for queue name " + name);
+      }
       FSQueue queue;
       String curName = null;
       curName = name.substring(0, sepIndex);
@@ -401,4 +408,13 @@ public class QueueManager {
     // recursively
     rootQueue.updatePreemptionVariables();
   }
+
+  /**
+   * Check whether queue name is valid,
+   * return true if it is valid, otherwise return false.
+   */
+  @VisibleForTesting
+  boolean isQueueNameValid(String node) {
+    return !node.isEmpty() && node.equals(node.trim());
+  }
 }

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

@@ -551,6 +551,29 @@ public class TestAllocationFileLoaderService {
     allocLoader.reloadAllocations();
   }
 
+  /**
+   * Verify that you can't have the queue name with whitespace only in the
+   * allocations file.
+   */
+  @Test (expected = AllocationConfigurationException.class)
+  public void testQueueNameContainingOnlyWhitespace() throws Exception {
+    Configuration conf = new Configuration();
+    conf.set(FairSchedulerConfiguration.ALLOCATION_FILE, ALLOC_FILE);
+
+    PrintWriter out = new PrintWriter(new FileWriter(ALLOC_FILE));
+    out.println("<?xml version=\"1.0\"?>");
+    out.println("<allocations>");
+    out.println("<queue name=\"      \">");
+    out.println("</queue>");
+    out.println("</allocations>");
+    out.close();
+
+    AllocationFileLoaderService allocLoader = new AllocationFileLoaderService();
+    allocLoader.init(conf);
+    ReloadListener confHolder = new ReloadListener();
+    allocLoader.setReloadListener(confHolder);
+    allocLoader.reloadAllocations();
+  }
 
   @Test
   public void testReservableQueue() throws Exception {

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

@@ -4444,4 +4444,82 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     assertEquals("Incorrect number of perf metrics", 1,
         collector.getRecords().size());
   }
+
+  @Test
+  public void testQueueNameWithTrailingSpace() throws Exception {
+    scheduler.init(conf);
+    scheduler.start();
+    scheduler.reinitialize(conf, resourceManager.getRMContext());
+
+    // only default queue
+    assertEquals(1, scheduler.getQueueManager().getLeafQueues().size());
+
+    // submit app with queue name "A"
+    ApplicationAttemptId appAttemptId1 = createAppAttemptId(1, 1);
+    AppAddedSchedulerEvent appAddedEvent1 = new AppAddedSchedulerEvent(
+        appAttemptId1.getApplicationId(), "A", "user1");
+    scheduler.handle(appAddedEvent1);
+    // submission accepted
+    assertEquals(2, scheduler.getQueueManager().getLeafQueues().size());
+    assertNotNull(scheduler.getSchedulerApplications().get(appAttemptId1.
+        getApplicationId()));
+
+    AppAttemptAddedSchedulerEvent attempAddedEvent =
+        new AppAttemptAddedSchedulerEvent(appAttemptId1, false);
+    scheduler.handle(attempAddedEvent);
+    // That queue should have one app
+    assertEquals(1, scheduler.getQueueManager().getLeafQueue("A", true)
+        .getNumRunnableApps());
+    assertNotNull(scheduler.getSchedulerApp(appAttemptId1));
+
+    // submit app with queue name "A "
+    ApplicationAttemptId appAttemptId2 = createAppAttemptId(2, 1);
+    AppAddedSchedulerEvent appAddedEvent2 = new AppAddedSchedulerEvent(
+        appAttemptId2.getApplicationId(), "A ", "user1");
+    scheduler.handle(appAddedEvent2);
+    // submission rejected
+    assertEquals(2, scheduler.getQueueManager().getLeafQueues().size());
+    assertNull(scheduler.getSchedulerApplications().get(appAttemptId2.
+        getApplicationId()));
+    assertNull(scheduler.getSchedulerApp(appAttemptId2));
+
+    // submit app with queue name "B.C"
+    ApplicationAttemptId appAttemptId3 = createAppAttemptId(3, 1);
+    AppAddedSchedulerEvent appAddedEvent3 = new AppAddedSchedulerEvent(
+        appAttemptId3.getApplicationId(), "B.C", "user1");
+    scheduler.handle(appAddedEvent3);
+    // submission accepted
+    assertEquals(3, scheduler.getQueueManager().getLeafQueues().size());
+    assertNotNull(scheduler.getSchedulerApplications().get(appAttemptId3.
+        getApplicationId()));
+
+    attempAddedEvent =
+        new AppAttemptAddedSchedulerEvent(appAttemptId3, false);
+    scheduler.handle(attempAddedEvent);
+    // That queue should have one app
+    assertEquals(1, scheduler.getQueueManager().getLeafQueue("B.C", true)
+        .getNumRunnableApps());
+    assertNotNull(scheduler.getSchedulerApp(appAttemptId3));
+  }
+
+  @Test
+  public void testEmptyQueueNameInConfigFile() throws IOException {
+    conf.set(FairSchedulerConfiguration.ALLOCATION_FILE, ALLOC_FILE);
+    // set empty queue name
+    PrintWriter out = new PrintWriter(new FileWriter(ALLOC_FILE));
+    out.println("<?xml version=\"1.0\"?>");
+    out.println("<allocations>");
+    out.println("<queue name=\"\">");
+    out.println("</queue>");
+    out.println("</allocations>");
+    out.close();
+    try {
+      scheduler.init(conf);
+      Assert.fail("scheduler init should fail because" +
+          " empty queue name.");
+    } catch (Exception e) {
+      Assert.assertTrue(e.getMessage().contains(
+          "Failed to initialize FairScheduler"));
+    }
+  }
 }

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

@@ -124,6 +124,17 @@ public class TestQueueManager {
         .getChildQueues().isEmpty());
   }
 
+  @Test
+  public void testCheckQueueNodeName() {
+    assertFalse(queueManager.isQueueNameValid(""));
+    assertFalse(queueManager.isQueueNameValid("  "));
+    assertFalse(queueManager.isQueueNameValid(" a"));
+    assertFalse(queueManager.isQueueNameValid("a "));
+    assertFalse(queueManager.isQueueNameValid(" a "));
+    assertTrue(queueManager.isQueueNameValid("a b"));
+    assertTrue(queueManager.isQueueNameValid("a"));
+  }
+
   private void updateConfiguredLeafQueues(QueueManager queueMgr, String... confLeafQueues) {
     AllocationConfiguration allocConf = new AllocationConfiguration(conf);
     allocConf.configuredQueues.get(FSQueueType.LEAF).addAll(Sets.newHashSet(confLeafQueues));