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Subject: svn commit: r1525313 - in /hadoop/common/trunk/hadoop-yarn-project:
 ./
 hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/
 hadoop-yarn/hadoop-yarn-server...
Date: Sun, 22 Sep 2013 01:46:59 -0000
To: yarn-commits@hadoop.apache.org
From: sandy@apache.org
Message-Id: <20130922014659.664252388A02@eris.apache.org>

Author: sandy
Date: Sun Sep 22 01:46:58 2013
New Revision: 1525313

URL: http://svn.apache.org/r1525313
Log:
YARN-1128. FifoPolicy.computeShares throws NPE on empty list of Schedulables (Karthik Kambatla via Sandy Ryza)

Added:
    hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/TestEmptyQueues.java
Modified:
    hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt
    hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/FifoPolicy.java

Modified: hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt
URL: http://svn.apache.org/viewvc/hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt?rev=1525313&r1=1525312&r2=1525313&view=diff
==============================================================================
--- hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt (original)
+++ hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt Sun Sep 22 01:46:58 2013
@@ -55,6 +55,9 @@ Release 2.2.0 - UNRELEASED
 
   BUG FIXES
 
+    YARN-1128. FifoPolicy.computeShares throws NPE on empty list of Schedulables
+    (Karthik Kambatla via Sandy Ryza)
+
 Release 2.1.1-beta - 2013-09-23
 
   INCOMPATIBLE CHANGES

Modified: hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/FifoPolicy.java
URL: http://svn.apache.org/viewvc/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/FifoPolicy.java?rev=1525313&r1=1525312&r2=1525313&view=diff
==============================================================================
--- hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/FifoPolicy.java (original)
+++ hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/FifoPolicy.java Sun Sep 22 01:46:58 2013
@@ -20,6 +20,7 @@ package org.apache.hadoop.yarn.server.re
 import java.io.Serializable;
 import java.util.Collection;
 import java.util.Comparator;
+import java.util.Iterator;
 
 import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.classification.InterfaceStability.Unstable;
@@ -73,6 +74,10 @@ public class FifoPolicy extends Scheduli
   @Override
   public void computeShares(Collection<? extends Schedulable> schedulables,
       Resource totalResources) {
+    if (schedulables.isEmpty()) {
+      return;
+    }
+
     Schedulable earliest = null;
     for (Schedulable schedulable : schedulables) {
       if (earliest == null ||

Added: hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/TestEmptyQueues.java
URL: http://svn.apache.org/viewvc/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/TestEmptyQueues.java?rev=1525313&view=auto
==============================================================================
--- hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/TestEmptyQueues.java (added)
+++ hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/TestEmptyQueues.java Sun Sep 22 01:46:58 2013
@@ -0,0 +1,57 @@
+/**
+ * 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.policies;
+
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.Schedulable;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.SchedulingPolicy;
+import org.apache.hadoop.yarn.util.resource.Resources;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+public class TestEmptyQueues {
+  private Collection<? extends Schedulable> schedulables;
+
+  @Before
+  public void setup() {
+    schedulables = new ArrayList<Schedulable>();
+  }
+
+  private void testComputeShares(SchedulingPolicy policy) {
+    policy.computeShares(schedulables, Resources.none());
+  }
+
+  @Test (timeout = 1000)
+  public void testFifoPolicy() {
+    testComputeShares(SchedulingPolicy.getInstance(FifoPolicy.class));
+  }
+
+  @Test (timeout = 1000)
+  public void testFairSharePolicy() {
+    testComputeShares(SchedulingPolicy.getInstance(FairSharePolicy.class));
+  }
+
+  @Test (timeout = 1000)
+  public void testDRFPolicy() {
+    testComputeShares(
+        SchedulingPolicy.getInstance(DominantResourceFairnessPolicy.class));
+  }
+}