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From wan...@apache.org
Subject [42/50] [abbrv] hadoop git commit: YARN-7520. Queue Ordering policy changes for ordering auto created leaf queues within Managed parent Queues. (Suma Shivaprasad via wangda)
Date Sun, 10 Dec 2017 21:55:15 GMT
YARN-7520. Queue Ordering policy changes for ordering auto created leaf queues within Managed
parent Queues. (Suma Shivaprasad via wangda)

Change-Id: I482f086945bd448d512cb5b3879d7371e37ee134


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/a8316df8
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/a8316df8
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/a8316df8

Branch: refs/heads/YARN-6592
Commit: a8316df8c05a7b3d1a5577174b838711a49ef971
Parents: f548bff
Author: Wangda Tan <wangda@apache.org>
Authored: Fri Dec 8 15:11:28 2017 -0800
Committer: Wangda Tan <wangda@apache.org>
Committed: Fri Dec 8 15:11:28 2017 -0800

----------------------------------------------------------------------
 .../PriorityUtilizationQueueOrderingPolicy.java | 83 ++++++++++++++------
 ...tPriorityUtilizationQueueOrderingPolicy.java | 78 ++++++++++++------
 2 files changed, 113 insertions(+), 48 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hadoop/blob/a8316df8/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/policy/PriorityUtilizationQueueOrderingPolicy.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/capacity/policy/PriorityUtilizationQueueOrderingPolicy.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/policy/PriorityUtilizationQueueOrderingPolicy.java
index 4985a1a..e684c2b 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/policy/PriorityUtilizationQueueOrderingPolicy.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/policy/PriorityUtilizationQueueOrderingPolicy.java
@@ -6,9 +6,9 @@
  * 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
- *
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
  * 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.
@@ -21,9 +21,11 @@ package org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.policy;
 import com.google.common.annotations.VisibleForTesting;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.hadoop.yarn.api.records.Resource;
-import org.apache.hadoop.yarn.server.resourcemanager.nodelabels.RMNodeLabelsManager;
+import org.apache.hadoop.yarn.server.resourcemanager.nodelabels
+    .RMNodeLabelsManager;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CSQueue;
-import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacitySchedulerConfiguration;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity
+    .CapacitySchedulerConfiguration;
 import org.apache.hadoop.yarn.util.resource.Resources;
 
 import java.util.ArrayList;
@@ -49,7 +51,8 @@ import java.util.function.Supplier;
  *   other is under: The queue that is under its capacity guarantee gets the
  *   resources.
  */
-public class PriorityUtilizationQueueOrderingPolicy implements QueueOrderingPolicy {
+public class PriorityUtilizationQueueOrderingPolicy
+    implements QueueOrderingPolicy {
   private List<CSQueue> queues;
   private boolean respectPriority;
 
@@ -78,7 +81,7 @@ public class PriorityUtilizationQueueOrderingPolicy implements QueueOrderingPoli
     if (priority1 == priority2) {
       // The queue with less relative used-capacity goes first
       return Double.compare(relativeAssigned1, relativeAssigned2);
-    } else {
+    } else{
       // When priority is different:
       if ((relativeAssigned1 < 1.0f && relativeAssigned2 < 1.0f) || (
           relativeAssigned1 >= 1.0f && relativeAssigned2 >= 1.0f)) {
@@ -86,7 +89,7 @@ public class PriorityUtilizationQueueOrderingPolicy implements QueueOrderingPoli
         // Or both the queues are over or meeting their guaranteed capacities
         // queue with higher used-capacity goes first
         return Integer.compare(priority2, priority1);
-      } else {
+      } else{
         // Otherwise, when one of the queues is over or meeting their
         // guaranteed capacities and the other is under: The queue that is
         // under its capacity guarantee gets the resources.
@@ -98,7 +101,7 @@ public class PriorityUtilizationQueueOrderingPolicy implements QueueOrderingPoli
   /**
    * Comparator that both looks at priority and utilization
    */
-  private class PriorityQueueComparator implements  Comparator<CSQueue> {
+  private class PriorityQueueComparator implements Comparator<CSQueue> {
 
     @Override
     public int compare(CSQueue q1, CSQueue q2) {
@@ -109,8 +112,38 @@ public class PriorityUtilizationQueueOrderingPolicy implements QueueOrderingPoli
         return rc;
       }
 
-      float used1 = q1.getQueueCapacities().getUsedCapacity(p);
-      float used2 = q2.getQueueCapacities().getUsedCapacity(p);
+      float q1AbsCapacity = q1.getQueueCapacities().getAbsoluteCapacity(p);
+      float q2AbsCapacity = q2.getQueueCapacities().getAbsoluteCapacity(p);
+
+      //If q1's abs capacity > 0 and q2 is 0, then prioritize q1
+      if (Float.compare(q1AbsCapacity, 0f) > 0 && Float.compare(q2AbsCapacity,
+          0f) == 0) {
+        return -1;
+        //If q2's abs capacity > 0 and q1 is 0, then prioritize q2
+      } else if (Float.compare(q2AbsCapacity, 0f) > 0 && Float.compare(
+          q1AbsCapacity, 0f) == 0) {
+        return 1;
+      } else if (Float.compare(q1AbsCapacity, 0f) == 0 && Float.compare(
+          q2AbsCapacity, 0f) == 0) {
+        // both q1 has 0 and q2 has 0 capacity, then fall back to using
+        // priority, abs used capacity to prioritize
+        float used1 = q1.getQueueCapacities().getAbsoluteUsedCapacity(p);
+        float used2 = q2.getQueueCapacities().getAbsoluteUsedCapacity(p);
+
+        return compare(q1, q2, used1, used2, p);
+      } else{
+        // both q1 has positive abs capacity and q2 has positive abs
+        // capacity
+        float used1 = q1.getQueueCapacities().getUsedCapacity(p);
+        float used2 = q2.getQueueCapacities().getUsedCapacity(p);
+
+        return compare(q1, q2, used1, used2, p);
+      }
+    }
+
+    private int compare(CSQueue q1, CSQueue q2, float q1Used, float q2Used,
+        String partition) {
+
       int p1 = 0;
       int p2 = 0;
       if (respectPriority) {
@@ -118,29 +151,31 @@ public class PriorityUtilizationQueueOrderingPolicy implements QueueOrderingPoli
         p2 = q2.getPriority().getPriority();
       }
 
-      rc = PriorityUtilizationQueueOrderingPolicy.compare(used1, used2, p1, p2);
+      int rc = PriorityUtilizationQueueOrderingPolicy.compare(q1Used, q2Used,
+          p1, p2);
 
       // For queue with same used ratio / priority, queue with higher configured
       // capacity goes first
       if (0 == rc) {
-        Resource minEffRes1 = q1.getQueueResourceQuotas()
-            .getConfiguredMinResource(p);
-        Resource minEffRes2 = q2.getQueueResourceQuotas()
-            .getConfiguredMinResource(p);
-        if (!minEffRes1.equals(Resources.none())
-            && !minEffRes2.equals(Resources.none())) {
+        Resource minEffRes1 =
+            q1.getQueueResourceQuotas().getConfiguredMinResource(partition);
+        Resource minEffRes2 =
+            q2.getQueueResourceQuotas().getConfiguredMinResource(partition);
+        if (!minEffRes1.equals(Resources.none()) && !minEffRes2.equals(
+            Resources.none())) {
           return minEffRes2.compareTo(minEffRes1);
         }
 
-        float abs1 = q1.getQueueCapacities().getAbsoluteCapacity(p);
-        float abs2 = q2.getQueueCapacities().getAbsoluteCapacity(p);
+        float abs1 = q1.getQueueCapacities().getAbsoluteCapacity(partition);
+        float abs2 = q2.getQueueCapacities().getAbsoluteCapacity(partition);
         return Float.compare(abs2, abs1);
       }
 
       return rc;
     }
 
-    private int compareQueueAccessToPartition(CSQueue q1, CSQueue q2, String partition) {
+    private int compareQueueAccessToPartition(CSQueue q1, CSQueue q2,
+        String partition) {
       // Everybody has access to default partition
       if (StringUtils.equals(partition, RMNodeLabelsManager.NO_LABEL)) {
         return 0;
@@ -190,9 +225,11 @@ public class PriorityUtilizationQueueOrderingPolicy implements QueueOrderingPoli
   @Override
   public String getConfigName() {
     if (respectPriority) {
-      return CapacitySchedulerConfiguration.QUEUE_PRIORITY_UTILIZATION_ORDERING_POLICY;
+      return CapacitySchedulerConfiguration.
+          QUEUE_PRIORITY_UTILIZATION_ORDERING_POLICY;
     } else{
-      return CapacitySchedulerConfiguration.QUEUE_UTILIZATION_ORDERING_POLICY;
+      return CapacitySchedulerConfiguration.
+          QUEUE_UTILIZATION_ORDERING_POLICY;
     }
   }
 

http://git-wip-us.apache.org/repos/asf/hadoop/blob/a8316df8/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/policy/TestPriorityUtilizationQueueOrderingPolicy.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/policy/TestPriorityUtilizationQueueOrderingPolicy.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/policy/TestPriorityUtilizationQueueOrderingPolicy.java
index b9d5b82..ca9a84b 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/policy/TestPriorityUtilizationQueueOrderingPolicy.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/policy/TestPriorityUtilizationQueueOrderingPolicy.java
@@ -36,7 +36,7 @@ import static org.mockito.Mockito.when;
 
 public class TestPriorityUtilizationQueueOrderingPolicy {
   private List<CSQueue> mockCSQueues(String[] queueNames, int[] priorities,
-      float[] utilizations, String partition) {
+      float[] utilizations, float[] absCapacities, String partition) {
     // sanity check
     assert queueNames != null && priorities != null && utilizations != null
         && queueNames.length > 0 && queueNames.length == priorities.length
@@ -48,6 +48,7 @@ public class TestPriorityUtilizationQueueOrderingPolicy {
       when(q.getQueueName()).thenReturn(queueNames[i]);
 
       QueueCapacities qc = new QueueCapacities(false);
+      qc.setAbsoluteCapacity(partition, absCapacities[i]);
       qc.setUsedCapacity(partition, utilizations[i]);
 
       when(q.getQueueCapacities()).thenReturn(qc);
@@ -81,41 +82,45 @@ public class TestPriorityUtilizationQueueOrderingPolicy {
 
     // Case 1, one queue
     policy.setQueues(mockCSQueues(new String[] { "a" }, new int[] { 0 },
-        new float[] { 0.1f }, ""));
+        new float[] { 0.1f }, new float[] {0.2f},  ""));
     verifyOrder(policy, "", new String[] { "a" });
 
     // Case 2, 2 queues
     policy.setQueues(mockCSQueues(new String[] { "a", "b" }, new int[] { 0, 0 },
-        new float[] { 0.1f, 0.0f }, ""));
+        new float[] { 0.1f, 0.0f }, new float[] {0.2f, 0.3f}, ""));
     verifyOrder(policy, "", new String[] { "b", "a" });
 
     // Case 3, 3 queues
     policy.setQueues(
         mockCSQueues(new String[] { "a", "b", "c" }, new int[] { 0, 0, 0 },
-            new float[] { 0.1f, 0.0f, 0.2f }, ""));
+            new float[] { 0.1f, 0.0f, 0.2f }, new float[] {0.2f, 0.3f, 0.4f},
+            ""));
     verifyOrder(policy, "", new String[] { "b", "a", "c" });
 
     // Case 4, 3 queues, ignore priority
     policy.setQueues(
         mockCSQueues(new String[] { "a", "b", "c" }, new int[] { 2, 1, 0 },
-            new float[] { 0.1f, 0.0f, 0.2f }, ""));
+            new float[] { 0.1f, 0.0f, 0.2f }, new float[] {0.2f, 0.3f, 0.4f},
+            ""));
     verifyOrder(policy, "", new String[] { "b", "a", "c" });
 
     // Case 5, 3 queues, look at partition (default)
     policy.setQueues(
         mockCSQueues(new String[] { "a", "b", "c" }, new int[] { 2, 1, 0 },
-            new float[] { 0.1f, 0.0f, 0.2f }, "x"));
+            new float[] { 0.1f, 0.0f, 0.2f }, new float[] {0.2f, 0.3f, 0.4f},
+            "x"));
     verifyOrder(policy, "", new String[] { "a", "b", "c" });
 
     // Case 5, 3 queues, look at partition (x)
     policy.setQueues(
         mockCSQueues(new String[] { "a", "b", "c" }, new int[] { 2, 1, 0 },
-            new float[] { 0.1f, 0.0f, 0.2f }, "x"));
+            new float[] { 0.1f, 0.0f, 0.2f }, new float[] {0.2f, 0.3f, 0.4f},
+            "x"));
     verifyOrder(policy, "x", new String[] { "b", "a", "c" });
 
     // Case 6, 3 queues, with different accessibility to partition
     List<CSQueue> queues = mockCSQueues(new String[] { "a", "b", "c" }, new int[] {
2, 1, 0 },
-        new float[] { 0.1f, 0.0f, 0.2f }, "x");
+        new float[] { 0.1f, 0.0f, 0.2f }, new float[] {0.2f, 0.3f, 0.4f},  "x");
     // a can access "x"
     when(queues.get(0).getAccessibleNodeLabels()).thenReturn(ImmutableSet.of("x", "y"));
     // c can access "x"
@@ -131,89 +136,94 @@ public class TestPriorityUtilizationQueueOrderingPolicy {
 
     // Case 1, one queue
     policy.setQueues(mockCSQueues(new String[] { "a" }, new int[] { 1 },
-        new float[] { 0.1f }, ""));
+        new float[] { 0.1f }, new float[] {0.2f}, ""));
     verifyOrder(policy, "", new String[] { "a" });
 
     // Case 2, 2 queues, both under utilized, same priority
     policy.setQueues(mockCSQueues(new String[] { "a", "b" }, new int[] { 1, 1 },
-        new float[] { 0.2f, 0.1f }, ""));
+        new float[] { 0.2f, 0.1f }, new float[] {0.2f, 0.3f}, ""));
     verifyOrder(policy, "", new String[] { "b", "a" });
 
     // Case 3, 2 queues, both over utilized, same priority
     policy.setQueues(mockCSQueues(new String[] { "a", "b" }, new int[] { 1, 1 },
-        new float[] { 1.1f, 1.2f }, ""));
+        new float[] { 1.1f, 1.2f },new float[] {0.2f, 0.3f},  ""));
     verifyOrder(policy, "", new String[] { "a", "b" });
 
     // Case 4, 2 queues, one under and one over, same priority
     policy.setQueues(mockCSQueues(new String[] { "a", "b" }, new int[] { 1, 1 },
-        new float[] { 0.1f, 1.2f }, ""));
+        new float[] { 0.1f, 1.2f }, new float[] {0.2f, 0.3f}, ""));
     verifyOrder(policy, "", new String[] { "a", "b" });
 
     // Case 5, 2 queues, both over utilized, different priority
     policy.setQueues(mockCSQueues(new String[] { "a", "b" }, new int[] { 1, 2 },
-        new float[] { 1.1f, 1.2f }, ""));
+        new float[] { 1.1f, 1.2f }, new float[] {0.2f, 0.3f}, ""));
     verifyOrder(policy, "", new String[] { "b", "a" });
 
     // Case 6, 2 queues, both under utilized, different priority
     policy.setQueues(mockCSQueues(new String[] { "a", "b" }, new int[] { 1, 2 },
-        new float[] { 0.1f, 0.2f }, ""));
+        new float[] { 0.1f, 0.2f }, new float[] {0.2f, 0.3f}, ""));
     verifyOrder(policy, "", new String[] { "b", "a" });
 
     // Case 7, 2 queues, one under utilized and one over utilized,
     // different priority (1)
     policy.setQueues(mockCSQueues(new String[] { "a", "b" }, new int[] { 1, 2 },
-        new float[] { 0.1f, 1.2f }, ""));
+        new float[] { 0.1f, 1.2f }, new float[] {0.2f, 0.3f}, ""));
     verifyOrder(policy, "", new String[] { "a", "b" });
 
     // Case 8, 2 queues, one under utilized and one over utilized,
     // different priority (1)
     policy.setQueues(mockCSQueues(new String[] { "a", "b" }, new int[] { 2, 1 },
-        new float[] { 0.1f, 1.2f }, ""));
+        new float[] { 0.1f, 1.2f }, new float[] {0.2f, 0.3f}, ""));
     verifyOrder(policy, "", new String[] { "a", "b" });
 
     // Case 9, 2 queues, one under utilized and one meet, different priority (1)
     policy.setQueues(mockCSQueues(new String[] { "a", "b" }, new int[] { 1, 2 },
-        new float[] { 0.1f, 1.0f }, ""));
+        new float[] { 0.1f, 1.0f }, new float[] {0.2f, 0.3f}, ""));
     verifyOrder(policy, "", new String[] { "a", "b" });
 
     // Case 10, 2 queues, one under utilized and one meet, different priority (2)
     policy.setQueues(mockCSQueues(new String[] { "a", "b" }, new int[] { 2, 1 },
-        new float[] { 0.1f, 1.0f }, ""));
+        new float[] { 0.1f, 1.0f }, new float[] {0.2f, 0.3f}, ""));
     verifyOrder(policy, "", new String[] { "a", "b" });
 
     // Case 11, 2 queues, one under utilized and one meet, same priority
     policy.setQueues(mockCSQueues(new String[] { "a", "b" }, new int[] { 1, 1 },
-        new float[] { 0.1f, 1.0f }, ""));
+        new float[] { 0.1f, 1.0f }, new float[] {0.2f, 0.3f}, ""));
     verifyOrder(policy, "", new String[] { "a", "b" });
 
     // Case 12, 2 queues, both meet, different priority
     policy.setQueues(mockCSQueues(new String[] { "a", "b" }, new int[] { 1, 2 },
-        new float[] { 1.0f, 1.0f }, ""));
+        new float[] { 1.0f, 1.0f }, new float[] {0.2f, 0.3f}, ""));
     verifyOrder(policy, "", new String[] { "b", "a" });
 
     // Case 13, 5 queues, different priority
     policy.setQueues(mockCSQueues(new String[] { "a", "b", "c", "d", "e" },
         new int[] { 1, 2, 0, 0, 3 },
-        new float[] { 1.2f, 1.0f, 0.2f, 1.1f, 0.2f }, ""));
+        new float[] { 1.2f, 1.0f, 0.2f, 1.1f, 0.2f },
+        new float[] { 0.2f, 0.1f, 0.1f, 0.3f, 0.3f }, ""));
     verifyOrder(policy, "", new String[] { "e", "c", "b", "a", "d" });
 
-    // Case 14, 5 queues, different priority, partition default;
+    // Case 14, 5 queues, different priority,
+    // partition default - abs capacity is 0;
     policy.setQueues(mockCSQueues(new String[] { "a", "b", "c", "d", "e" },
         new int[] { 1, 2, 0, 0, 3 },
-        new float[] { 1.2f, 1.0f, 0.2f, 1.1f, 0.2f }, "x"));
+        new float[] { 1.2f, 1.0f, 0.2f, 1.1f, 0.2f },
+        new float[] { 0.2f, 0.1f, 0.1f, 0.3f, 0.3f }, "x"));
     verifyOrder(policy, "", new String[] { "e", "b", "a", "c", "d" });
 
     // Case 15, 5 queues, different priority, partition x;
     policy.setQueues(mockCSQueues(new String[] { "a", "b", "c", "d", "e" },
         new int[] { 1, 2, 0, 0, 3 },
-        new float[] { 1.2f, 1.0f, 0.2f, 1.1f, 0.2f }, "x"));
+        new float[] { 1.2f, 1.0f, 0.2f, 1.1f, 0.2f },
+        new float[] { 0.2f, 0.1f, 0.1f, 0.3f, 0.3f }, "x"));
     verifyOrder(policy, "x", new String[] { "e", "c", "b", "a", "d" });
 
     // Case 16, 5 queues, different priority, partition x; and different
     // accessibility
     List<CSQueue> queues = mockCSQueues(new String[] { "a", "b", "c", "d", "e" },
         new int[] { 1, 2, 0, 0, 3 },
-        new float[] { 1.2f, 1.0f, 0.2f, 1.1f, 0.2f }, "x");
+        new float[] { 1.2f, 1.0f, 0.2f, 1.1f, 0.2f },
+        new float[] { 0.2f, 0.1f, 0.1f, 0.3f, 0.3f }, "x");
     // Only a/d has access to x
     when(queues.get(0).getAccessibleNodeLabels()).thenReturn(
         ImmutableSet.of("x"));
@@ -221,5 +231,23 @@ public class TestPriorityUtilizationQueueOrderingPolicy {
         ImmutableSet.of("x"));
     policy.setQueues(queues);
     verifyOrder(policy, "x", new String[] { "a", "d", "e", "c", "b" });
+
+    // Case 17, 2 queues, one's abs capacity is 0
+    policy.setQueues(mockCSQueues(new String[] { "a", "b" }, new int[] { 1, 1 },
+        new float[] { 0.1f, 1.2f }, new float[] {0.0f, 0.3f}, ""));
+    verifyOrder(policy, "", new String[] { "b", "a" });
+
+    // Case 18, 2 queues, one's abs capacity is 0
+    policy.setQueues(mockCSQueues(new String[] { "a", "b" }, new int[] { 1, 1 },
+        new float[] { 0.1f, 1.2f }, new float[] {0.3f, 0.0f}, ""));
+    verifyOrder(policy, "", new String[] { "a", "b" });
+
+    //Case 19, 5 queues with 2 having abs capacity 0 are prioritized last
+    policy.setQueues(mockCSQueues(new String[] { "a", "b", "c", "d", "e" },
+        new int[] { 1, 2, 0, 0, 3 },
+        new float[] { 1.2f, 1.0f, 0.2f, 1.1f, 0.2f },
+        new float[] { 0.0f, 0.0f, 0.1f, 0.3f, 0.3f }, "x"));
+    verifyOrder(policy, "x", new String[] { "e", "c", "d", "b", "a" });
+
   }
 }


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