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 | |
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19 | package org.apache.hadoop.mapred; |
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20 | |
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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.commons.logging.Log; |
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26 | import org.apache.commons.logging.LogFactory; |
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27 | import org.apache.hadoop.conf.Configuration; |
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28 | import org.apache.hadoop.fs.FSDataOutputStream; |
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29 | import org.apache.hadoop.fs.FileSystem; |
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30 | import org.apache.hadoop.fs.Path; |
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31 | import org.apache.hadoop.hdfs.MiniDFSCluster; |
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32 | import org.apache.hadoop.mapred.JobTracker.RecoveryManager; |
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33 | import org.apache.hadoop.mapred.MiniMRCluster.JobTrackerRunner; |
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34 | import org.apache.hadoop.mapred.TestJobInProgressListener.MyScheduler; |
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35 | import org.apache.hadoop.security.UserGroupInformation; |
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36 | |
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37 | /** |
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38 | * Test whether the {@link RecoveryManager} is able to tolerate job-recovery |
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39 | * failures and the jobtracker is able to tolerate {@link RecoveryManager} |
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40 | * failure. |
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41 | */ |
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42 | public class TestRecoveryManager extends TestCase { |
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43 | private static final Log LOG = |
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44 | LogFactory.getLog(TestRecoveryManager.class); |
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45 | private static final Path TEST_DIR = |
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46 | new Path(System.getProperty("test.build.data", "/tmp"), |
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47 | "test-recovery-manager"); |
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48 | |
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49 | /** |
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50 | * Tests the {@link JobTracker} against the exceptions thrown in |
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51 | * {@link JobTracker.RecoveryManager}. It does the following : |
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52 | * - submits 2 jobs |
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53 | * - kills the jobtracker |
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54 | * - Garble job.xml for one job causing it to fail in constructor |
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55 | * and job.split for another causing it to fail in init. |
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56 | * - restarts the jobtracker |
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57 | * - checks if the jobtraker starts normally |
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58 | */ |
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59 | public void testJobTracker() throws Exception { |
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60 | LOG.info("Testing jobtracker restart with faulty job"); |
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61 | String signalFile = new Path(TEST_DIR, "signal").toString(); |
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62 | JobConf conf = new JobConf(); |
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63 | |
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64 | FileSystem fs = FileSystem.get(new Configuration()); |
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65 | fs.delete(TEST_DIR, true); // cleanup |
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66 | |
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67 | conf.set("mapred.jobtracker.job.history.block.size", "1024"); |
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68 | conf.set("mapred.jobtracker.job.history.buffer.size", "1024"); |
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69 | |
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70 | MiniMRCluster mr = new MiniMRCluster(1, "file:///", 1, null, null, conf); |
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71 | |
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72 | JobConf job1 = mr.createJobConf(); |
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73 | |
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74 | UtilsForTests.configureWaitingJobConf(job1, |
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75 | new Path(TEST_DIR, "input"), new Path(TEST_DIR, "output1"), 2, 0, |
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76 | "test-recovery-manager", signalFile, signalFile); |
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77 | |
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78 | // submit the faulty job |
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79 | RunningJob rJob1 = (new JobClient(job1)).submitJob(job1); |
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80 | LOG.info("Submitted job " + rJob1.getID()); |
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81 | |
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82 | while (rJob1.mapProgress() < 0.5f) { |
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83 | LOG.info("Waiting for job " + rJob1.getID() + " to be 50% done"); |
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84 | UtilsForTests.waitFor(100); |
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85 | } |
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86 | |
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87 | JobConf job2 = mr.createJobConf(); |
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88 | |
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89 | UtilsForTests.configureWaitingJobConf(job2, |
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90 | new Path(TEST_DIR, "input"), new Path(TEST_DIR, "output2"), 30, 0, |
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91 | "test-recovery-manager", signalFile, signalFile); |
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92 | |
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93 | // submit the faulty job |
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94 | RunningJob rJob2 = (new JobClient(job2)).submitJob(job2); |
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95 | LOG.info("Submitted job " + rJob2.getID()); |
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96 | |
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97 | while (rJob2.mapProgress() < 0.5f) { |
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98 | LOG.info("Waiting for job " + rJob2.getID() + " to be 50% done"); |
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99 | UtilsForTests.waitFor(100); |
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100 | } |
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101 | |
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102 | // kill the jobtracker |
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103 | LOG.info("Stopping jobtracker"); |
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104 | String sysDir = mr.getJobTrackerRunner().getJobTracker().getSystemDir(); |
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105 | mr.stopJobTracker(); |
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106 | |
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107 | // delete the job.xml of job #1 causing the job to fail in constructor |
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108 | Path jobFile = |
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109 | new Path(sysDir, rJob1.getID().toString() + Path.SEPARATOR + "job.xml"); |
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110 | LOG.info("Deleting job.xml file : " + jobFile.toString()); |
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111 | fs.delete(jobFile, false); // delete the job.xml file |
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112 | |
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113 | // create the job.xml file with 0 bytes |
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114 | FSDataOutputStream out = fs.create(jobFile); |
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115 | out.write(1); |
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116 | out.close(); |
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117 | |
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118 | // delete the job.split of job #2 causing the job to fail in initTasks |
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119 | Path jobSplitFile = |
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120 | new Path(sysDir, rJob2.getID().toString() + Path.SEPARATOR + "job.split"); |
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121 | LOG.info("Deleting job.split file : " + jobSplitFile.toString()); |
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122 | fs.delete(jobSplitFile, false); // delete the job.split file |
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123 | |
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124 | // create the job.split file with 0 bytes |
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125 | out = fs.create(jobSplitFile); |
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126 | out.write(1); |
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127 | out.close(); |
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128 | |
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129 | // make sure that the jobtracker is in recovery mode |
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130 | mr.getJobTrackerConf().setBoolean("mapred.jobtracker.restart.recover", |
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131 | true); |
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132 | // start the jobtracker |
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133 | LOG.info("Starting jobtracker"); |
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134 | mr.startJobTracker(); |
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135 | ClusterStatus status = |
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136 | mr.getJobTrackerRunner().getJobTracker().getClusterStatus(false); |
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137 | |
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138 | // check if the jobtracker came up or not |
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139 | assertEquals("JobTracker crashed!", |
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140 | JobTracker.State.RUNNING, status.getJobTrackerState()); |
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141 | |
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142 | mr.shutdown(); |
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143 | } |
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144 | |
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145 | /** |
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146 | * Tests the {@link JobTracker.RecoveryManager} against the exceptions thrown |
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147 | * during recovery. It does the following : |
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148 | * - submits a job with HIGH priority and x tasks |
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149 | * - allows it to complete 50% |
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150 | * - submits another job with normal priority and y tasks |
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151 | * - kills the jobtracker |
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152 | * - restarts the jobtracker with max-tasks-per-job such that |
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153 | * y < max-tasks-per-job < x |
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154 | * - checks if the jobtraker starts normally and job#2 is recovered while |
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155 | * job#1 is failed. |
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156 | */ |
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157 | public void testRecoveryManager() throws Exception { |
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158 | LOG.info("Testing recovery-manager"); |
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159 | String signalFile = new Path(TEST_DIR, "signal").toString(); |
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160 | |
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161 | // clean up |
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162 | FileSystem fs = FileSystem.get(new Configuration()); |
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163 | fs.delete(TEST_DIR, true); |
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164 | |
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165 | JobConf conf = new JobConf(); |
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166 | conf.set("mapred.jobtracker.job.history.block.size", "1024"); |
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167 | conf.set("mapred.jobtracker.job.history.buffer.size", "1024"); |
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168 | |
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169 | MiniMRCluster mr = new MiniMRCluster(1, "file:///", 1, null, null, conf); |
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170 | JobTracker jobtracker = mr.getJobTrackerRunner().getJobTracker(); |
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171 | |
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172 | JobConf job1 = mr.createJobConf(); |
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173 | // set the high priority |
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174 | job1.setJobPriority(JobPriority.HIGH); |
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175 | |
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176 | UtilsForTests.configureWaitingJobConf(job1, |
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177 | new Path(TEST_DIR, "input"), new Path(TEST_DIR, "output3"), 30, 0, |
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178 | "test-recovery-manager", signalFile, signalFile); |
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179 | |
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180 | // submit the faulty job |
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181 | JobClient jc = new JobClient(job1); |
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182 | RunningJob rJob1 = jc.submitJob(job1); |
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183 | LOG.info("Submitted first job " + rJob1.getID()); |
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184 | |
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185 | while (rJob1.mapProgress() < 0.5f) { |
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186 | LOG.info("Waiting for job " + rJob1.getID() + " to be 50% done"); |
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187 | UtilsForTests.waitFor(100); |
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188 | } |
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189 | |
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190 | // now submit job2 |
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191 | JobConf job2 = mr.createJobConf(); |
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192 | |
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193 | String signalFile1 = new Path(TEST_DIR, "signal1").toString(); |
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194 | UtilsForTests.configureWaitingJobConf(job2, |
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195 | new Path(TEST_DIR, "input"), new Path(TEST_DIR, "output4"), 20, 0, |
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196 | "test-recovery-manager", signalFile1, signalFile1); |
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197 | |
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198 | // submit the job |
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199 | RunningJob rJob2 = (new JobClient(job2)).submitJob(job2); |
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200 | LOG.info("Submitted job " + rJob2.getID()); |
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201 | |
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202 | // wait for it to init |
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203 | JobInProgress jip = jobtracker.getJob(rJob2.getID()); |
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204 | |
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205 | while (!jip.inited()) { |
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206 | LOG.info("Waiting for job " + jip.getJobID() + " to be inited"); |
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207 | UtilsForTests.waitFor(100); |
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208 | } |
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209 | |
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210 | // now submit job3 with inappropriate acls |
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211 | JobConf job3 = mr.createJobConf(); |
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212 | job3.set("hadoop.job.ugi","abc,users"); |
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213 | |
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214 | UtilsForTests.configureWaitingJobConf(job3, |
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215 | new Path(TEST_DIR, "input"), new Path(TEST_DIR, "output5"), 1, 0, |
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216 | "test-recovery-manager", signalFile, signalFile); |
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217 | |
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218 | // submit the job |
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219 | RunningJob rJob3 = (new JobClient(job3)).submitJob(job3); |
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220 | LOG.info("Submitted job " + rJob3.getID() + " with different user"); |
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221 | |
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222 | jip = jobtracker.getJob(rJob3.getID()); |
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223 | |
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224 | while (!jip.inited()) { |
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225 | LOG.info("Waiting for job " + jip.getJobID() + " to be inited"); |
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226 | UtilsForTests.waitFor(100); |
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227 | } |
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228 | |
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229 | // kill the jobtracker |
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230 | LOG.info("Stopping jobtracker"); |
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231 | mr.stopJobTracker(); |
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232 | |
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233 | // make sure that the jobtracker is in recovery mode |
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234 | mr.getJobTrackerConf().setBoolean("mapred.jobtracker.restart.recover", |
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235 | true); |
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236 | mr.getJobTrackerConf().setInt("mapred.jobtracker.maxtasks.per.job", 25); |
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237 | |
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238 | mr.getJobTrackerConf().setBoolean("mapred.acls.enabled" , true); |
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239 | UserGroupInformation ugi = UserGroupInformation.readFrom(job1); |
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240 | mr.getJobTrackerConf().set("mapred.queue.default.acl-submit-job", |
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241 | ugi.getUserName()); |
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242 | |
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243 | // start the jobtracker |
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244 | LOG.info("Starting jobtracker"); |
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245 | mr.startJobTracker(); |
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246 | UtilsForTests.waitForJobTracker(jc); |
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247 | |
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248 | jobtracker = mr.getJobTrackerRunner().getJobTracker(); |
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249 | |
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250 | // assert that job2 is recovered by the jobtracker as job1 would fail |
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251 | assertEquals("Recovery manager failed to tolerate job failures", |
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252 | 2, jobtracker.getAllJobs().length); |
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253 | |
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254 | // check if the job#1 has failed |
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255 | JobStatus status = jobtracker.getJobStatus(rJob1.getID()); |
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256 | assertEquals("Faulty job not failed", |
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257 | JobStatus.FAILED, status.getRunState()); |
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258 | |
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259 | jip = jobtracker.getJob(rJob2.getID()); |
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260 | assertFalse("Job should be running", jip.isComplete()); |
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261 | |
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262 | status = jobtracker.getJobStatus(rJob3.getID()); |
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263 | assertNull("Job should be missing", status); |
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264 | |
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265 | mr.shutdown(); |
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266 | } |
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267 | |
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268 | /** |
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269 | * Test if restart count of the jobtracker is correctly managed. |
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270 | * Steps are as follows : |
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271 | * - start the jobtracker and check if the info file gets created. |
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272 | * - stops the jobtracker, deletes the jobtracker.info file and checks if |
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273 | * upon restart the recovery is 'off' |
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274 | * - submit a job to the jobtracker. |
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275 | * - restart the jobtracker k times and check if the restart count on ith |
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276 | * iteration is i. |
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277 | * - submit a new job and check if its restart count is 0. |
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278 | * - garble the jobtracker.info file and restart he jobtracker, the |
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279 | * jobtracker should crash. |
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280 | */ |
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281 | public void testRestartCount() throws Exception { |
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282 | LOG.info("Testing restart-count"); |
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283 | String signalFile = new Path(TEST_DIR, "signal").toString(); |
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284 | |
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285 | // clean up |
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286 | FileSystem fs = FileSystem.get(new Configuration()); |
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287 | fs.delete(TEST_DIR, true); |
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288 | |
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289 | JobConf conf = new JobConf(); |
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290 | conf.set("mapred.jobtracker.job.history.block.size", "1024"); |
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291 | conf.set("mapred.jobtracker.job.history.buffer.size", "1024"); |
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292 | conf.setBoolean("mapred.jobtracker.restart.recover", true); |
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293 | // since there is no need for initing |
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294 | conf.setClass("mapred.jobtracker.taskScheduler", MyScheduler.class, |
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295 | TaskScheduler.class); |
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296 | |
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297 | MiniMRCluster mr = new MiniMRCluster(1, "file:///", 1, null, null, conf); |
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298 | JobTracker jobtracker = mr.getJobTrackerRunner().getJobTracker(); |
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299 | JobClient jc = new JobClient(mr.createJobConf()); |
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300 | |
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301 | // check if the jobtracker info file exists |
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302 | Path infoFile = jobtracker.recoveryManager.getRestartCountFile(); |
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303 | assertTrue("Jobtracker infomation is missing", fs.exists(infoFile)); |
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304 | |
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305 | // check if garbling the system files disables the recovery process |
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306 | LOG.info("Stopping jobtracker for testing with system files deleted"); |
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307 | mr.stopJobTracker(); |
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308 | |
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309 | // delete the info file |
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310 | Path rFile = jobtracker.recoveryManager.getRestartCountFile(); |
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311 | fs.delete(rFile,false); |
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312 | |
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313 | // start the jobtracker |
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314 | LOG.info("Starting jobtracker with system files deleted"); |
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315 | mr.startJobTracker(); |
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316 | |
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317 | UtilsForTests.waitForJobTracker(jc); |
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318 | jobtracker = mr.getJobTrackerRunner().getJobTracker(); |
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319 | |
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320 | // check if the recovey is disabled |
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321 | assertFalse("Recovery is not disabled upon missing system files", |
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322 | jobtracker.recoveryManager.shouldRecover()); |
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323 | |
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324 | // check if the system dir is sane |
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325 | assertTrue("Recovery file is missing upon restart", fs.exists(rFile)); |
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326 | Path tFile = jobtracker.recoveryManager.getTempRestartCountFile(); |
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327 | assertFalse("Temp recovery file exists upon restart", fs.exists(tFile)); |
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328 | |
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329 | // submit a job |
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330 | JobConf job = mr.createJobConf(); |
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331 | |
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332 | UtilsForTests.configureWaitingJobConf(job, |
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333 | new Path(TEST_DIR, "input"), new Path(TEST_DIR, "output6"), 2, 0, |
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334 | "test-recovery-manager", signalFile, signalFile); |
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335 | |
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336 | // submit the faulty job |
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337 | RunningJob rJob = jc.submitJob(job); |
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338 | LOG.info("Submitted first job " + rJob.getID()); |
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339 | |
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340 | // kill the jobtracker multiple times and check if the count is correct |
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341 | for (int i = 1; i <= 5; ++i) { |
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342 | LOG.info("Stopping jobtracker for " + i + " time"); |
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343 | mr.stopJobTracker(); |
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344 | |
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345 | // start the jobtracker |
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346 | LOG.info("Starting jobtracker for " + i + " time"); |
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347 | mr.startJobTracker(); |
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348 | |
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349 | UtilsForTests.waitForJobTracker(jc); |
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350 | |
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351 | // check if the system dir is sane |
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352 | assertTrue("Recovery file is missing upon restart", fs.exists(rFile)); |
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353 | assertFalse("Temp recovery file exists upon restart", fs.exists(tFile)); |
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354 | |
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355 | jobtracker = mr.getJobTrackerRunner().getJobTracker(); |
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356 | JobInProgress jip = jobtracker.getJob(rJob.getID()); |
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357 | |
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358 | // assert if restart count is correct |
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359 | assertEquals("Recovery manager failed to recover restart count", |
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360 | i, jip.getNumRestarts()); |
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361 | } |
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362 | |
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363 | // kill the old job |
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364 | rJob.killJob(); |
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365 | |
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366 | // II. Submit a new job and check if the restart count is 0 |
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367 | JobConf job1 = mr.createJobConf(); |
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368 | |
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369 | UtilsForTests.configureWaitingJobConf(job1, |
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370 | new Path(TEST_DIR, "input"), new Path(TEST_DIR, "output7"), 50, 0, |
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371 | "test-recovery-manager", signalFile, signalFile); |
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372 | |
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373 | // make sure that the job id's dont clash |
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374 | jobtracker.getNewJobId(); |
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375 | |
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376 | // submit a new job |
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377 | rJob = jc.submitJob(job1); |
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378 | LOG.info("Submitted first job after restart" + rJob.getID()); |
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379 | |
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380 | // assert if restart count is correct |
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381 | JobInProgress jip = jobtracker.getJob(rJob.getID()); |
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382 | assertEquals("Restart count for new job is incorrect", |
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383 | 0, jip.getNumRestarts()); |
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384 | |
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385 | LOG.info("Stopping jobtracker for testing the fs errors"); |
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386 | mr.stopJobTracker(); |
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387 | |
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388 | // check if system.dir problems in recovery kills the jobtracker |
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389 | fs.delete(rFile, false); |
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390 | FSDataOutputStream out = fs.create(rFile); |
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391 | out.writeBoolean(true); |
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392 | out.close(); |
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393 | |
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394 | // start the jobtracker |
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395 | LOG.info("Starting jobtracker with fs errors"); |
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396 | mr.startJobTracker(); |
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397 | JobTrackerRunner runner = mr.getJobTrackerRunner(); |
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398 | assertFalse("JobTracker is still alive", runner.isActive()); |
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399 | |
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400 | mr.shutdown(); |
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401 | } |
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402 | |
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403 | /** |
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404 | * Test if the jobtracker waits for the info file to be created before |
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405 | * starting. |
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406 | */ |
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407 | public void testJobTrackerInfoCreation() throws Exception { |
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408 | LOG.info("Testing jobtracker.info file"); |
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409 | MiniDFSCluster dfs = new MiniDFSCluster(new Configuration(), 1, true, null); |
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410 | String namenode = (dfs.getFileSystem()).getUri().getHost() + ":" |
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411 | + (dfs.getFileSystem()).getUri().getPort(); |
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412 | // shut down the data nodes |
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413 | dfs.shutdownDataNodes(); |
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414 | |
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415 | // start the jobtracker |
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416 | JobConf conf = new JobConf(); |
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417 | FileSystem.setDefaultUri(conf, namenode); |
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418 | conf.set("mapred.job.tracker", "localhost:0"); |
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419 | conf.set("mapred.job.tracker.http.address", "127.0.0.1:0"); |
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420 | |
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421 | JobTracker jobtracker = new JobTracker(conf); |
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422 | |
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423 | // now check if the update restart count works fine or not |
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424 | boolean failed = false; |
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425 | try { |
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426 | jobtracker.recoveryManager.updateRestartCount(); |
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427 | } catch (IOException ioe) { |
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428 | failed = true; |
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429 | } |
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430 | assertTrue("JobTracker created info files without datanodes!!!", failed); |
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431 | |
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432 | Path restartFile = jobtracker.recoveryManager.getRestartCountFile(); |
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433 | Path tmpRestartFile = jobtracker.recoveryManager.getTempRestartCountFile(); |
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434 | FileSystem fs = dfs.getFileSystem(); |
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435 | assertFalse("Info file exists after update failure", |
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436 | fs.exists(restartFile)); |
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437 | assertFalse("Temporary restart-file exists after update failure", |
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438 | fs.exists(restartFile)); |
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439 | |
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440 | // start 1 data node |
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441 | dfs.startDataNodes(conf, 1, true, null, null, null, null); |
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442 | dfs.waitActive(); |
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443 | |
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444 | failed = false; |
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445 | try { |
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446 | jobtracker.recoveryManager.updateRestartCount(); |
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447 | } catch (IOException ioe) { |
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448 | failed = true; |
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449 | } |
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450 | assertFalse("JobTracker failed to create info files with datanodes!!!", failed); |
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451 | } |
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452 | } |
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