[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.mapred; |
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| 19 | |
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| 20 | import java.io.IOException; |
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| 21 | import junit.framework.TestCase; |
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| 22 | import org.apache.hadoop.hdfs.TestHDFSServerPorts; |
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| 23 | import org.apache.hadoop.hdfs.server.datanode.DataNode; |
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| 24 | import org.apache.hadoop.hdfs.server.namenode.NameNode; |
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| 25 | import org.apache.hadoop.conf.Configuration; |
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| 26 | import org.apache.hadoop.fs.FileSystem; |
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| 27 | |
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| 28 | /** |
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| 29 | * This test checks correctness of port usage by mapreduce components: |
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| 30 | * JobTracker, and TaskTracker. |
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| 31 | * |
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| 32 | * The correct behavior is:<br> |
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| 33 | * - when a specific port is provided the server must either start on that port |
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| 34 | * or fail by throwing {@link java.net.BindException}.<br> |
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| 35 | * - if the port = 0 (ephemeral) then the server should choose |
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| 36 | * a free port and start on it. |
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| 37 | */ |
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| 38 | public class TestMRServerPorts extends TestCase { |
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| 39 | TestHDFSServerPorts hdfs = new TestHDFSServerPorts(); |
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| 40 | |
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| 41 | // Runs the JT in a separate thread |
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| 42 | private static class JTRunner extends Thread { |
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| 43 | JobTracker jt; |
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| 44 | void setJobTracker(JobTracker jt) { |
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| 45 | this.jt = jt; |
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| 46 | } |
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| 47 | |
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| 48 | public void run() { |
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| 49 | if (jt != null) { |
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| 50 | try { |
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| 51 | jt.offerService(); |
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| 52 | } catch (Exception ioe) {} |
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| 53 | } |
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| 54 | } |
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| 55 | } |
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| 56 | /** |
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| 57 | * Check whether the JobTracker can be started. |
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| 58 | */ |
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| 59 | private JobTracker startJobTracker(JobConf conf, JTRunner runner) |
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| 60 | throws IOException { |
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| 61 | conf.set("mapred.job.tracker", "localhost:0"); |
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| 62 | conf.set("mapred.job.tracker.http.address", "0.0.0.0:0"); |
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| 63 | JobTracker jt = null; |
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| 64 | try { |
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| 65 | jt = JobTracker.startTracker(conf); |
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| 66 | runner.setJobTracker(jt); |
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| 67 | runner.start(); |
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| 68 | conf.set("mapred.job.tracker", "localhost:" + jt.getTrackerPort()); |
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| 69 | conf.set("mapred.job.tracker.http.address", |
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| 70 | "0.0.0.0:" + jt.getInfoPort()); |
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| 71 | } catch(InterruptedException e) { |
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| 72 | throw new IOException(e.getLocalizedMessage()); |
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| 73 | } |
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| 74 | return jt; |
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| 75 | } |
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| 76 | |
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| 77 | private void setDataNodePorts(Configuration conf) { |
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| 78 | conf.set("dfs.datanode.address", |
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| 79 | TestHDFSServerPorts.NAME_NODE_HOST + "0"); |
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| 80 | conf.set("dfs.datanode.http.address", |
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| 81 | TestHDFSServerPorts.NAME_NODE_HTTP_HOST + "0"); |
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| 82 | conf.set("dfs.datanode.ipc.address", |
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| 83 | TestHDFSServerPorts.NAME_NODE_HOST + "0"); |
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| 84 | } |
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| 85 | |
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| 86 | /** |
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| 87 | * Check whether the JobTracker can be started. |
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| 88 | */ |
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| 89 | private boolean canStartJobTracker(JobConf conf) |
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| 90 | throws IOException, InterruptedException { |
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| 91 | JobTracker jt = null; |
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| 92 | try { |
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| 93 | jt = JobTracker.startTracker(conf); |
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| 94 | } catch(IOException e) { |
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| 95 | if (e instanceof java.net.BindException) |
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| 96 | return false; |
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| 97 | throw e; |
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| 98 | } |
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| 99 | jt.fs.close(); |
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| 100 | jt.stopTracker(); |
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| 101 | return true; |
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| 102 | } |
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| 103 | |
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| 104 | /** |
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| 105 | * Check whether the TaskTracker can be started. |
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| 106 | */ |
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| 107 | private boolean canStartTaskTracker(JobConf conf) |
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| 108 | throws IOException, InterruptedException { |
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| 109 | TaskTracker tt = null; |
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| 110 | try { |
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| 111 | tt = new TaskTracker(conf); |
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| 112 | } catch(IOException e) { |
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| 113 | if (e instanceof java.net.BindException) |
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| 114 | return false; |
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| 115 | throw e; |
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| 116 | } |
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| 117 | tt.shutdown(); |
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| 118 | return true; |
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| 119 | } |
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| 120 | |
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| 121 | /** |
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| 122 | * Verify JobTracker port usage. |
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| 123 | */ |
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| 124 | public void testJobTrackerPorts() throws Exception { |
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| 125 | NameNode nn = null; |
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| 126 | DataNode dn = null; |
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| 127 | try { |
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| 128 | nn = hdfs.startNameNode(); |
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| 129 | setDataNodePorts(hdfs.getConfig()); |
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| 130 | dn = hdfs.startDataNode(1, hdfs.getConfig()); |
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| 131 | |
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| 132 | // start job tracker on the same port as name-node |
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| 133 | JobConf conf2 = new JobConf(hdfs.getConfig()); |
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| 134 | conf2.set("mapred.job.tracker", |
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| 135 | FileSystem.getDefaultUri(hdfs.getConfig()).toString()); |
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| 136 | conf2.set("mapred.job.tracker.http.address", |
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| 137 | TestHDFSServerPorts.NAME_NODE_HTTP_HOST + 0); |
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| 138 | boolean started = canStartJobTracker(conf2); |
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| 139 | assertFalse(started); // should fail |
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| 140 | |
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| 141 | // bind http server to the same port as name-node |
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| 142 | conf2.set("mapred.job.tracker", TestHDFSServerPorts.NAME_NODE_HOST + 0); |
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| 143 | conf2.set("mapred.job.tracker.http.address", |
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| 144 | hdfs.getConfig().get("dfs.http.address")); |
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| 145 | started = canStartJobTracker(conf2); |
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| 146 | assertFalse(started); // should fail again |
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| 147 | |
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| 148 | // both ports are different from the name-node ones |
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| 149 | conf2.set("mapred.job.tracker", TestHDFSServerPorts.NAME_NODE_HOST + 0); |
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| 150 | conf2.set("mapred.job.tracker.http.address", |
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| 151 | TestHDFSServerPorts.NAME_NODE_HTTP_HOST + 0); |
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| 152 | started = canStartJobTracker(conf2); |
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| 153 | assertTrue(started); // should start now |
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| 154 | |
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| 155 | } finally { |
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| 156 | hdfs.stopDataNode(dn); |
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| 157 | hdfs.stopNameNode(nn); |
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| 158 | } |
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| 159 | } |
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| 160 | |
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| 161 | /** |
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| 162 | * Verify JobTracker port usage. |
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| 163 | */ |
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| 164 | public void testTaskTrackerPorts() throws Exception { |
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| 165 | NameNode nn = null; |
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| 166 | DataNode dn = null; |
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| 167 | JobTracker jt = null; |
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| 168 | JTRunner runner = null; |
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| 169 | try { |
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| 170 | nn = hdfs.startNameNode(); |
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| 171 | setDataNodePorts(hdfs.getConfig()); |
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| 172 | dn = hdfs.startDataNode(2, hdfs.getConfig()); |
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| 173 | |
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| 174 | JobConf conf2 = new JobConf(hdfs.getConfig()); |
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| 175 | runner = new JTRunner(); |
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| 176 | jt = startJobTracker(conf2, runner); |
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| 177 | |
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| 178 | // start job tracker on the same port as name-node |
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| 179 | conf2.set("mapred.task.tracker.report.address", |
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| 180 | FileSystem.getDefaultUri(hdfs.getConfig()).toString()); |
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| 181 | conf2.set("mapred.task.tracker.http.address", |
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| 182 | TestHDFSServerPorts.NAME_NODE_HTTP_HOST + 0); |
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| 183 | boolean started = canStartTaskTracker(conf2); |
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| 184 | assertFalse(started); // should fail |
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| 185 | |
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| 186 | // bind http server to the same port as name-node |
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| 187 | conf2.set("mapred.task.tracker.report.address", |
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| 188 | TestHDFSServerPorts.NAME_NODE_HOST + 0); |
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| 189 | conf2.set("mapred.task.tracker.http.address", |
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| 190 | hdfs.getConfig().get("dfs.http.address")); |
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| 191 | started = canStartTaskTracker(conf2); |
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| 192 | assertFalse(started); // should fail again |
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| 193 | |
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| 194 | // both ports are different from the name-node ones |
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| 195 | conf2.set("mapred.task.tracker.report.address", |
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| 196 | TestHDFSServerPorts.NAME_NODE_HOST + 0); |
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| 197 | conf2.set("mapred.task.tracker.http.address", |
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| 198 | TestHDFSServerPorts.NAME_NODE_HTTP_HOST + 0); |
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| 199 | started = canStartTaskTracker(conf2); |
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| 200 | assertTrue(started); // should start now |
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| 201 | } finally { |
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| 202 | if (jt != null) { |
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| 203 | jt.fs.close(); |
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| 204 | jt.stopTracker(); |
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| 205 | runner.interrupt(); |
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| 206 | runner.join(); |
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| 207 | } |
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| 208 | hdfs.stopDataNode(dn); |
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| 209 | hdfs.stopNameNode(nn); |
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| 210 | } |
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| 211 | } |
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| 212 | } |
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