[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | package org.apache.hadoop.hdfs; |
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| 19 | |
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| 20 | import java.io.File; |
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| 21 | import java.io.IOException; |
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| 22 | |
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| 23 | import junit.framework.TestCase; |
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| 24 | import org.apache.hadoop.conf.Configuration; |
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| 25 | import org.apache.hadoop.fs.FileSystem; |
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| 26 | import org.apache.hadoop.fs.FileUtil; |
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| 27 | import org.apache.hadoop.hdfs.server.datanode.DataNode; |
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| 28 | import org.apache.hadoop.hdfs.server.namenode.NameNode; |
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| 29 | import org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode; |
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| 30 | import org.apache.hadoop.ipc.RPC; |
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| 31 | |
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| 32 | /** |
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| 33 | * This test checks correctness of port usage by hdfs components: |
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| 34 | * NameNode, DataNode, and SecondaryNamenode. |
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| 35 | * |
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| 36 | * The correct behavior is:<br> |
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| 37 | * - when a specific port is provided the server must either start on that port |
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| 38 | * or fail by throwing {@link java.net.BindException}.<br> |
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| 39 | * - if the port = 0 (ephemeral) then the server should choose |
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| 40 | * a free port and start on it. |
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| 41 | */ |
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| 42 | public class TestHDFSServerPorts extends TestCase { |
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| 43 | public static final String NAME_NODE_HOST = "localhost:"; |
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| 44 | public static final String NAME_NODE_HTTP_HOST = "0.0.0.0:"; |
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| 45 | |
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| 46 | Configuration config; |
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| 47 | File hdfsDir; |
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| 48 | |
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| 49 | /** |
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| 50 | * Start the name-node. |
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| 51 | */ |
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| 52 | public NameNode startNameNode() throws IOException { |
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| 53 | String dataDir = System.getProperty("test.build.data"); |
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| 54 | hdfsDir = new File(dataDir, "dfs"); |
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| 55 | if ( hdfsDir.exists() && !FileUtil.fullyDelete(hdfsDir) ) { |
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| 56 | throw new IOException("Could not delete hdfs directory '" + hdfsDir + "'"); |
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| 57 | } |
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| 58 | config = new Configuration(); |
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| 59 | config.set("dfs.name.dir", new File(hdfsDir, "name1").getPath()); |
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| 60 | FileSystem.setDefaultUri(config, "hdfs://"+NAME_NODE_HOST + "0"); |
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| 61 | config.set("dfs.http.address", NAME_NODE_HTTP_HOST + "0"); |
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| 62 | NameNode.format(config); |
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| 63 | |
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| 64 | String[] args = new String[] {}; |
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| 65 | // NameNode will modify config with the ports it bound to |
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| 66 | return NameNode.createNameNode(args, config); |
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| 67 | } |
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| 68 | |
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| 69 | /** |
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| 70 | * Start the data-node. |
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| 71 | */ |
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| 72 | public DataNode startDataNode(int index, Configuration config) |
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| 73 | throws IOException { |
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| 74 | String dataDir = System.getProperty("test.build.data"); |
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| 75 | File dataNodeDir = new File(dataDir, "data-" + index); |
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| 76 | config.set("dfs.data.dir", dataNodeDir.getPath()); |
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| 77 | |
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| 78 | String[] args = new String[] {}; |
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| 79 | // NameNode will modify config with the ports it bound to |
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| 80 | return DataNode.createDataNode(args, config); |
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| 81 | } |
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| 82 | |
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| 83 | /** |
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| 84 | * Stop the datanode. |
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| 85 | */ |
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| 86 | public void stopDataNode(DataNode dn) { |
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| 87 | if (dn != null) { |
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| 88 | dn.shutdown(); |
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| 89 | } |
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| 90 | } |
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| 91 | |
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| 92 | public void stopNameNode(NameNode nn) { |
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| 93 | if (nn != null) { |
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| 94 | nn.stop(); |
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| 95 | } |
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| 96 | } |
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| 97 | |
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| 98 | public Configuration getConfig() { |
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| 99 | return this.config; |
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| 100 | } |
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| 101 | |
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| 102 | /** |
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| 103 | * Check whether the name-node can be started. |
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| 104 | */ |
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| 105 | private boolean canStartNameNode(Configuration conf) throws IOException { |
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| 106 | NameNode nn2 = null; |
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| 107 | try { |
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| 108 | nn2 = NameNode.createNameNode(new String[]{}, conf); |
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| 109 | } catch(IOException e) { |
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| 110 | if (e instanceof java.net.BindException) |
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| 111 | return false; |
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| 112 | throw e; |
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| 113 | } |
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| 114 | stopNameNode(nn2); |
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| 115 | return true; |
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| 116 | } |
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| 117 | |
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| 118 | /** |
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| 119 | * Check whether the data-node can be started. |
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| 120 | */ |
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| 121 | private boolean canStartDataNode(Configuration conf) throws IOException { |
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| 122 | DataNode dn = null; |
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| 123 | try { |
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| 124 | dn = DataNode.createDataNode(new String[]{}, conf); |
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| 125 | } catch(IOException e) { |
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| 126 | if (e instanceof java.net.BindException) |
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| 127 | return false; |
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| 128 | throw e; |
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| 129 | } |
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| 130 | dn.shutdown(); |
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| 131 | return true; |
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| 132 | } |
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| 133 | |
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| 134 | /** |
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| 135 | * Check whether the secondary name-node can be started. |
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| 136 | */ |
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| 137 | private boolean canStartSecondaryNode(Configuration conf) throws IOException { |
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| 138 | SecondaryNameNode sn = null; |
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| 139 | try { |
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| 140 | sn = new SecondaryNameNode(conf); |
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| 141 | } catch(IOException e) { |
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| 142 | if (e instanceof java.net.BindException) |
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| 143 | return false; |
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| 144 | throw e; |
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| 145 | } |
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| 146 | sn.shutdown(); |
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| 147 | return true; |
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| 148 | } |
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| 149 | |
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| 150 | /** |
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| 151 | * Verify name-node port usage. |
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| 152 | */ |
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| 153 | public void testNameNodePorts() throws Exception { |
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| 154 | NameNode nn = null; |
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| 155 | try { |
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| 156 | nn = startNameNode(); |
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| 157 | |
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| 158 | // start another namenode on the same port |
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| 159 | Configuration conf2 = new Configuration(config); |
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| 160 | conf2.set("dfs.name.dir", new File(hdfsDir, "name2").getPath()); |
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| 161 | NameNode.format(conf2); |
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| 162 | boolean started = canStartNameNode(conf2); |
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| 163 | assertFalse(started); // should fail |
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| 164 | |
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| 165 | // start on a different main port |
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| 166 | FileSystem.setDefaultUri(conf2, "hdfs://"+NAME_NODE_HOST + "0"); |
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| 167 | started = canStartNameNode(conf2); |
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| 168 | assertFalse(started); // should fail again |
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| 169 | |
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| 170 | // reset conf2 since NameNode modifies it |
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| 171 | FileSystem.setDefaultUri(conf2, "hdfs://"+NAME_NODE_HOST + "0"); |
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| 172 | // different http port |
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| 173 | conf2.set("dfs.http.address", NAME_NODE_HTTP_HOST + "0"); |
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| 174 | started = canStartNameNode(conf2); |
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| 175 | assertTrue(started); // should start now |
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| 176 | } finally { |
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| 177 | stopNameNode(nn); |
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| 178 | } |
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| 179 | } |
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| 180 | |
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| 181 | /** |
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| 182 | * Verify data-node port usage. |
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| 183 | */ |
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| 184 | public void testDataNodePorts() throws Exception { |
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| 185 | NameNode nn = null; |
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| 186 | try { |
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| 187 | nn = startNameNode(); |
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| 188 | |
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| 189 | // start data-node on the same port as name-node |
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| 190 | Configuration conf2 = new Configuration(config); |
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| 191 | conf2.set("dfs.data.dir", new File(hdfsDir, "data").getPath()); |
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| 192 | conf2.set("dfs.datanode.address", |
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| 193 | FileSystem.getDefaultUri(config).getAuthority()); |
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| 194 | conf2.set("dfs.datanode.http.address", NAME_NODE_HTTP_HOST + "0"); |
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| 195 | boolean started = canStartDataNode(conf2); |
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| 196 | assertFalse(started); // should fail |
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| 197 | |
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| 198 | // bind http server to the same port as name-node |
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| 199 | conf2.set("dfs.datanode.address", NAME_NODE_HOST + "0"); |
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| 200 | conf2.set("dfs.datanode.http.address", |
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| 201 | config.get("dfs.http.address")); |
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| 202 | started = canStartDataNode(conf2); |
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| 203 | assertFalse(started); // should fail |
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| 204 | |
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| 205 | // both ports are different from the name-node ones |
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| 206 | conf2.set("dfs.datanode.address", NAME_NODE_HOST + "0"); |
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| 207 | conf2.set("dfs.datanode.http.address", NAME_NODE_HTTP_HOST + "0"); |
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| 208 | conf2.set("dfs.datanode.ipc.address", NAME_NODE_HOST + "0"); |
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| 209 | started = canStartDataNode(conf2); |
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| 210 | assertTrue(started); // should start now |
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| 211 | } finally { |
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| 212 | stopNameNode(nn); |
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| 213 | } |
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| 214 | } |
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| 215 | |
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| 216 | /** |
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| 217 | * Verify secondary name-node port usage. |
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| 218 | */ |
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| 219 | public void testSecondaryNodePorts() throws Exception { |
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| 220 | NameNode nn = null; |
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| 221 | try { |
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| 222 | nn = startNameNode(); |
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| 223 | |
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| 224 | // bind http server to the same port as name-node |
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| 225 | Configuration conf2 = new Configuration(config); |
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| 226 | conf2.set("dfs.secondary.http.address", |
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| 227 | config.get("dfs.http.address")); |
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| 228 | SecondaryNameNode.LOG.info("= Starting 1 on: " + |
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| 229 | conf2.get("dfs.secondary.http.address")); |
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| 230 | boolean started = canStartSecondaryNode(conf2); |
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| 231 | assertFalse(started); // should fail |
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| 232 | |
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| 233 | // bind http server to a different port |
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| 234 | conf2.set("dfs.secondary.http.address", NAME_NODE_HTTP_HOST + "0"); |
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| 235 | SecondaryNameNode.LOG.info("= Starting 2 on: " + |
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| 236 | conf2.get("dfs.secondary.http.address")); |
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| 237 | started = canStartSecondaryNode(conf2); |
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| 238 | assertTrue(started); // should start now |
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| 239 | } finally { |
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| 240 | stopNameNode(nn); |
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| 241 | } |
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| 242 | } |
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| 243 | } |
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