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.DataOutputStream; |
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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 | |
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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 | import org.apache.hadoop.fs.Path; |
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28 | import org.apache.hadoop.hdfs.MiniDFSCluster; |
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29 | import org.apache.hadoop.mapred.lib.IdentityMapper; |
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30 | import org.apache.hadoop.mapred.lib.IdentityReducer; |
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31 | |
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32 | /** |
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33 | * Tests various failures in setup/cleanup of job, like |
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34 | * throwing exception, command line kill and lost tracker |
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35 | */ |
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36 | public class TestSetupAndCleanupFailure extends TestCase { |
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37 | |
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38 | final Path inDir = new Path("./input"); |
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39 | final Path outDir = new Path("./output"); |
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40 | static Path setupSignalFile = new Path("/setup-signal"); |
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41 | static Path cleanupSignalFile = new Path("/cleanup-signal"); |
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42 | String input = "The quick brown fox\nhas many silly\nred fox sox\n"; |
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43 | |
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44 | // Commiter with setupJob throwing exception |
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45 | static class CommitterWithFailSetup extends FileOutputCommitter { |
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46 | @Override |
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47 | public void setupJob(JobContext context) throws IOException { |
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48 | throw new IOException(); |
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49 | } |
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50 | } |
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51 | |
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52 | // Commiter with cleanupJob throwing exception |
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53 | static class CommitterWithFailCleanup extends FileOutputCommitter { |
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54 | @Override |
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55 | public void cleanupJob(JobContext context) throws IOException { |
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56 | throw new IOException(); |
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57 | } |
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58 | } |
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59 | |
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60 | // Committer waits for a file to be created on dfs. |
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61 | static class CommitterWithLongSetupAndCleanup extends FileOutputCommitter { |
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62 | |
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63 | private void waitForSignalFile(FileSystem fs, Path signalFile) |
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64 | throws IOException { |
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65 | while (!fs.exists(signalFile)) { |
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66 | try { |
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67 | Thread.sleep(100); |
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68 | } catch (InterruptedException ie) { |
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69 | break; |
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70 | } |
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71 | } |
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72 | } |
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73 | |
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74 | @Override |
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75 | public void setupJob(JobContext context) throws IOException { |
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76 | waitForSignalFile(FileSystem.get(context.getJobConf()), setupSignalFile); |
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77 | super.setupJob(context); |
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78 | } |
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79 | |
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80 | @Override |
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81 | public void cleanupJob(JobContext context) throws IOException { |
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82 | waitForSignalFile(FileSystem.get(context.getJobConf()), cleanupSignalFile); |
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83 | super.cleanupJob(context); |
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84 | } |
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85 | } |
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86 | |
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87 | public RunningJob launchJob(JobConf conf) |
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88 | throws IOException { |
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89 | // set up the input file system and write input text. |
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90 | FileSystem inFs = inDir.getFileSystem(conf); |
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91 | FileSystem outFs = outDir.getFileSystem(conf); |
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92 | outFs.delete(outDir, true); |
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93 | if (!inFs.mkdirs(inDir)) { |
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94 | throw new IOException("Mkdirs failed to create " + inDir.toString()); |
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95 | } |
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96 | { |
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97 | // write input into input file |
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98 | DataOutputStream file = inFs.create(new Path(inDir, "part-0")); |
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99 | file.writeBytes(input); |
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100 | file.close(); |
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101 | } |
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102 | |
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103 | // configure the mapred Job |
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104 | conf.setMapperClass(IdentityMapper.class); |
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105 | conf.setReducerClass(IdentityReducer.class); |
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106 | FileInputFormat.setInputPaths(conf, inDir); |
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107 | FileOutputFormat.setOutputPath(conf, outDir); |
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108 | String TEST_ROOT_DIR = new Path(System.getProperty("test.build.data", |
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109 | "/tmp")).toString().replace(' ', '+'); |
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110 | conf.set("test.build.data", TEST_ROOT_DIR); |
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111 | |
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112 | // return the RunningJob handle. |
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113 | return new JobClient(conf).submitJob(conf); |
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114 | } |
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115 | |
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116 | // Among these tips only one of the tasks will be running, |
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117 | // get the taskid for that task |
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118 | private TaskAttemptID getRunningTaskID(TaskInProgress[] tips) { |
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119 | TaskAttemptID taskid = null; |
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120 | while (taskid == null) { |
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121 | for (TaskInProgress tip :tips) { |
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122 | TaskStatus[] statuses = tip.getTaskStatuses(); |
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123 | for (TaskStatus status : statuses) { |
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124 | if (status.getRunState() == TaskStatus.State.RUNNING) { |
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125 | taskid = status.getTaskID(); |
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126 | break; |
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127 | } |
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128 | } |
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129 | if (taskid != null) break; |
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130 | } |
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131 | try { |
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132 | Thread.sleep(10); |
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133 | } catch (InterruptedException ie) {} |
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134 | } |
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135 | return taskid; |
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136 | } |
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137 | |
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138 | // Tests the failures in setup/cleanup job. Job should cleanly fail. |
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139 | private void testFailCommitter(Class<? extends OutputCommitter> theClass, |
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140 | JobConf jobConf) |
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141 | throws IOException { |
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142 | jobConf.setOutputCommitter(theClass); |
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143 | RunningJob job = launchJob(jobConf); |
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144 | // wait for the job to finish. |
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145 | job.waitForCompletion(); |
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146 | assertEquals(JobStatus.FAILED, job.getJobState()); |
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147 | } |
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148 | |
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149 | // launch job with CommitterWithLongSetupAndCleanup as committer |
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150 | // and wait till the job is inited. |
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151 | private RunningJob launchJobWithWaitingSetupAndCleanup(MiniMRCluster mr) |
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152 | throws IOException { |
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153 | // launch job with waiting setup/cleanup |
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154 | JobConf jobConf = mr.createJobConf(); |
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155 | jobConf.setOutputCommitter(CommitterWithLongSetupAndCleanup.class); |
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156 | RunningJob job = launchJob(jobConf); |
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157 | JobTracker jt = mr.getJobTrackerRunner().getJobTracker(); |
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158 | JobInProgress jip = jt.getJob(job.getID()); |
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159 | while (!jip.inited()) { |
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160 | try { |
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161 | Thread.sleep(10); |
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162 | } catch (InterruptedException ie) {} |
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163 | } |
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164 | return job; |
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165 | } |
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166 | |
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167 | /** |
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168 | * Tests setup and cleanup attempts getting killed from command-line |
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169 | * and lost tracker |
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170 | * |
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171 | * @param mr |
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172 | * @param dfs |
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173 | * @param commandLineKill if true, test with command-line kill |
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174 | * else, test with lost tracker |
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175 | * @throws IOException |
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176 | */ |
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177 | private void testSetupAndCleanupKill(MiniMRCluster mr, |
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178 | MiniDFSCluster dfs, |
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179 | boolean commandLineKill) |
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180 | throws IOException { |
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181 | // launch job with waiting setup/cleanup |
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182 | RunningJob job = launchJobWithWaitingSetupAndCleanup(mr); |
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183 | |
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184 | JobTracker jt = mr.getJobTrackerRunner().getJobTracker(); |
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185 | JobInProgress jip = jt.getJob(job.getID()); |
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186 | // get the running setup task id |
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187 | TaskAttemptID setupID = getRunningTaskID(jip.getSetupTasks()); |
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188 | if (commandLineKill) { |
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189 | killTaskFromCommandLine(job, setupID, jt); |
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190 | } else { |
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191 | killTaskWithLostTracker(mr, setupID); |
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192 | } |
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193 | // signal the setup to complete |
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194 | UtilsForTests.writeFile(dfs.getNameNode(), |
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195 | dfs.getFileSystem().getConf(), |
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196 | setupSignalFile, (short)3); |
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197 | // wait for maps and reduces to complete |
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198 | while (job.reduceProgress() != 1.0f) { |
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199 | try { |
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200 | Thread.sleep(100); |
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201 | } catch (InterruptedException ie) {} |
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202 | } |
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203 | // get the running cleanup task id |
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204 | TaskAttemptID cleanupID = getRunningTaskID(jip.getCleanupTasks()); |
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205 | if (commandLineKill) { |
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206 | killTaskFromCommandLine(job, cleanupID, jt); |
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207 | } else { |
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208 | killTaskWithLostTracker(mr, cleanupID); |
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209 | } |
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210 | // signal the cleanup to complete |
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211 | UtilsForTests.writeFile(dfs.getNameNode(), |
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212 | dfs.getFileSystem().getConf(), |
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213 | cleanupSignalFile, (short)3); |
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214 | // wait for the job to finish. |
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215 | job.waitForCompletion(); |
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216 | assertEquals(JobStatus.SUCCEEDED, job.getJobState()); |
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217 | assertEquals(TaskStatus.State.KILLED, |
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218 | jt.getTaskStatus(setupID).getRunState()); |
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219 | assertEquals(TaskStatus.State.KILLED, |
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220 | jt.getTaskStatus(cleanupID).getRunState()); |
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221 | } |
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222 | |
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223 | // kill the task from command-line |
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224 | // wait till it kill is reported back |
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225 | private void killTaskFromCommandLine(RunningJob job, |
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226 | TaskAttemptID taskid, |
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227 | JobTracker jt) |
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228 | throws IOException { |
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229 | job.killTask(taskid, false); |
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230 | // wait till the kill happens |
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231 | while (jt.getTaskStatus(taskid).getRunState() != |
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232 | TaskStatus.State.KILLED) { |
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233 | try { |
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234 | Thread.sleep(10); |
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235 | } catch (InterruptedException ie) {} |
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236 | } |
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237 | |
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238 | } |
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239 | // kill the task by losing the tracker |
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240 | private void killTaskWithLostTracker(MiniMRCluster mr, |
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241 | TaskAttemptID taskid) { |
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242 | JobTracker jt = mr.getJobTrackerRunner().getJobTracker(); |
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243 | String trackerName = jt.getTaskStatus(taskid).getTaskTracker(); |
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244 | int trackerID = mr.getTaskTrackerID(trackerName); |
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245 | assertTrue(trackerID != -1); |
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246 | mr.stopTaskTracker(trackerID); |
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247 | } |
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248 | |
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249 | // Tests the failures in setup/cleanup job. Job should cleanly fail. |
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250 | // Also Tests the command-line kill for setup/cleanup attempts. |
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251 | // tests the setup/cleanup attempts getting killed if |
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252 | // they were running on a lost tracker |
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253 | public void testWithDFS() throws IOException { |
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254 | MiniDFSCluster dfs = null; |
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255 | MiniMRCluster mr = null; |
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256 | FileSystem fileSys = null; |
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257 | try { |
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258 | final int taskTrackers = 4; |
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259 | Configuration conf = new Configuration(); |
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260 | dfs = new MiniDFSCluster(conf, 4, true, null); |
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261 | fileSys = dfs.getFileSystem(); |
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262 | JobConf jtConf = new JobConf(); |
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263 | jtConf.setInt("mapred.tasktracker.map.tasks.maximum", 1); |
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264 | jtConf.setInt("mapred.tasktracker.reduce.tasks.maximum", 1); |
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265 | jtConf.setLong("mapred.tasktracker.expiry.interval", 10 * 1000); |
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266 | jtConf.setInt("mapred.reduce.copy.backoff", 4); |
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267 | mr = new MiniMRCluster(taskTrackers, fileSys.getUri().toString(), 1, |
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268 | null, null, jtConf); |
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269 | // test setup/cleanup throwing exceptions |
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270 | testFailCommitter(CommitterWithFailSetup.class, mr.createJobConf()); |
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271 | testFailCommitter(CommitterWithFailCleanup.class, mr.createJobConf()); |
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272 | // test the command-line kill for setup/cleanup attempts. |
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273 | testSetupAndCleanupKill(mr, dfs, true); |
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274 | // remove setup/cleanup signal files. |
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275 | fileSys.delete(setupSignalFile , true); |
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276 | fileSys.delete(cleanupSignalFile , true); |
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277 | // test the setup/cleanup attempts getting killed if |
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278 | // they were running on a lost tracker |
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279 | testSetupAndCleanupKill(mr, dfs, false); |
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280 | } finally { |
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281 | if (dfs != null) { dfs.shutdown(); } |
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282 | if (mr != null) { mr.shutdown(); |
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283 | } |
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284 | } |
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285 | } |
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286 | |
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287 | public static void main(String[] argv) throws Exception { |
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288 | TestSetupAndCleanupFailure td = new TestSetupAndCleanupFailure(); |
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289 | td.testWithDFS(); |
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290 | } |
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291 | } |
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