| /** |
| * 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.hdfs.server.datanode; |
| |
| import static org.junit.Assert.*; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.hdfs.server.datanode.DataNode.BPOfferService; |
| import org.junit.Test; |
| |
| /** |
| * Tests datanode refresh namenode list functionality. |
| */ |
| public class TestRefreshNamenodes { |
| private int nnPort1 = 2221; |
| private int nnPort2 = 2224; |
| private int nnPort3 = 2227; |
| private int nnPort4 = 2230; |
| |
| @Test |
| public void testRefreshNamenodes() throws IOException { |
| // Start cluster with a single NN and DN |
| Configuration conf = new Configuration(); |
| MiniDFSCluster cluster = null; |
| try { |
| conf.set(DFSConfigKeys.DFS_FEDERATION_NAMESERVICES, "namesServerId1"); |
| cluster = new MiniDFSCluster.Builder(conf).federation(true). |
| numNameNodes(1).nameNodePort(nnPort1).build(); |
| |
| DataNode dn = cluster.getDataNodes().get(0); |
| assertEquals(1, dn.getAllBpOs().length); |
| |
| cluster.addNameNode(conf, nnPort2); |
| assertEquals(2, dn.getAllBpOs().length); |
| |
| cluster.addNameNode(conf, nnPort3); |
| assertEquals(3, dn.getAllBpOs().length); |
| |
| cluster.addNameNode(conf, nnPort4); |
| |
| BPOfferService[] bpoList = dn.getAllBpOs(); |
| // Ensure a BPOfferService in the datanodes corresponds to |
| // a namenode in the cluster |
| for (int i = 0; i < 4; i++) { |
| InetSocketAddress addr = cluster.getNameNode(i).getNameNodeAddress(); |
| boolean found = false; |
| for (int j = 0; j < bpoList.length; j++) { |
| if (bpoList[j] != null && addr.equals(bpoList[j].nnAddr)) { |
| found = true; |
| bpoList[j] = null; // Erase the address that matched |
| break; |
| } |
| } |
| assertTrue("NameNode address " + addr + " is not found.", found); |
| } |
| } finally { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| } |