YARN-10108. FS-CS converter: nestedUserQueue with default rule results in invalid queue mapping. Contributed by Gergely Pollak

(cherry picked from commit ac4540dd8e)

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

@@ -989,12 +989,14 @@ public class CapacityScheduler extends
           // not auto-created above, then its parent queue should match
           // the parent queue specified in queue mapping
         } else if (!queue.getParent().getQueueShortName().equals(
-            placementContext.getParentQueue())) {
+                placementContext.getParentQueue())
+            && !queue.getParent().getQueuePath().equals(
+                placementContext.getParentQueue())) {
           String message =
               "Auto created Leaf queue " + placementContext.getQueue() + " "
                   + "already exists under queue : " + queue
                   .getParent().getQueueShortName()
-                  + ".But Queue mapping configuration " +
+                  + ". But Queue mapping configuration " +
                    CapacitySchedulerConfiguration.QUEUE_MAPPING + " has been "
                   + "updated to a different parent queue : "
                   + placementContext.getParentQueue()

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

@@ -162,6 +162,35 @@ public class TestCapacitySchedulerAutoQueueCreation
     }
   }
 
+  @Test(timeout = 20000)
+  public void testAutoCreateLeafQueueCreationUsingFullParentPath()
+      throws Exception {
+
+    try {
+      setupGroupQueueMappings("root.d", cs.getConfiguration(), "%user");
+      cs.reinitialize(cs.getConfiguration(), mockRM.getRMContext());
+
+      submitApp(mockRM, cs.getQueue("d"), TEST_GROUPUSER, TEST_GROUPUSER, 1, 1);
+      AutoCreatedLeafQueue autoCreatedLeafQueue =
+          (AutoCreatedLeafQueue) cs.getQueue(TEST_GROUPUSER);
+      ManagedParentQueue parentQueue = (ManagedParentQueue) cs.getQueue("d");
+      assertEquals(parentQueue, autoCreatedLeafQueue.getParent());
+
+      Map<String, Float> expectedChildQueueAbsCapacity =
+          new HashMap<String, Float>() {{
+            put(NO_LABEL, 0.02f);
+          }};
+
+      validateInitialQueueEntitlement(parentQueue, TEST_GROUPUSER,
+          expectedChildQueueAbsCapacity,
+          new HashSet<String>() {{ add(NO_LABEL); }});
+
+    } finally {
+      cleanupQueue(USER0);
+      cleanupQueue(TEST_GROUPUSER);
+    }
+  }
+
   @Test
   public void testReinitializeStoppedAutoCreatedLeafQueue() throws Exception {
     try {