MAPREDUCE-3030. Fixed a bug in NodeId.equals() that was causing RM to reject all NMs. Contributed by Devaraj K.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1172638 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -1348,6 +1348,9 @@ Release 0.23.0 - Unreleased
     MAPREDUCE-2925. Fixed Yarn+MR client code to behave saner with completed
     jobs. (Devaraj K via vinodkv)
 
+    MAPREDUCE-3030. Fixed a bug in NodeId.equals() that was causing RM to
+    reject all NMs. (Devaraj K via vinodkv)
+
 Release 0.22.0 - Unreleased
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/NodeId.java

@@ -76,7 +76,7 @@ public int hashCode() {
   public boolean equals(Object obj) {
     if (this == obj)
       return true;
-    if (!super.equals(obj))
+    if (obj == null)
       return false;
     if (getClass() != obj.getClass())
       return false;

hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/api/TestNodeId.java

@@ -0,0 +1,56 @@
+/**
+ * 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.api;
+
+import junit.framework.Assert;
+
+import org.apache.hadoop.yarn.api.records.NodeId;
+import org.apache.hadoop.yarn.util.Records;
+import org.junit.Test;
+
+public class TestNodeId {
+  @Test
+  public void testNodeId() {
+    NodeId nodeId1 = createNodeId("10.18.52.124", 45454);
+    NodeId nodeId2 = createNodeId("10.18.52.125", 45452);
+    NodeId nodeId3 = createNodeId("10.18.52.124", 45454);
+    NodeId nodeId4 = createNodeId("10.18.52.124", 45453);
+
+    Assert.assertTrue(nodeId1.equals(nodeId3));
+    Assert.assertFalse(nodeId1.equals(nodeId2));
+    Assert.assertFalse(nodeId3.equals(nodeId4));
+
+    Assert.assertTrue(nodeId1.compareTo(nodeId3) == 0);
+    Assert.assertTrue(nodeId1.compareTo(nodeId2) < 0);
+    Assert.assertTrue(nodeId3.compareTo(nodeId4) > 0);
+
+    Assert.assertTrue(nodeId1.hashCode() == nodeId3.hashCode());
+    Assert.assertFalse(nodeId1.hashCode() == nodeId2.hashCode());
+    Assert.assertFalse(nodeId3.hashCode() == nodeId4.hashCode());
+
+    Assert.assertEquals("10.18.52.124:45454", nodeId1.toString());
+  }
+
+  private NodeId createNodeId(String host, int port) {
+    NodeId nodeId = Records.newRecord(NodeId.class);
+    nodeId.setHost(host);
+    nodeId.setPort(port);
+    return nodeId;
+  }
+}