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 java.util.ArrayList; |
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22 | import java.util.Collection; |
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23 | import java.util.HashMap; |
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24 | import java.util.List; |
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25 | import java.util.Map; |
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26 | |
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27 | import junit.framework.TestCase; |
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28 | |
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29 | import org.apache.hadoop.io.IntWritable; |
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30 | import org.apache.hadoop.mapred.JobInProgress.KillInterruptedException; |
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31 | import org.apache.hadoop.mapred.JobStatusChangeEvent.EventType; |
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32 | |
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33 | public class TestParallelInitialization extends TestCase { |
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34 | |
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35 | private static int jobCounter; |
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36 | private static final int NUM_JOBS = 3; |
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37 | IntWritable numJobsCompleted = new IntWritable(); |
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38 | |
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39 | static void resetCounters() { |
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40 | jobCounter = 0; |
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41 | } |
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42 | |
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43 | class FakeJobInProgress extends JobInProgress { |
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44 | |
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45 | public FakeJobInProgress(JobConf jobConf, |
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46 | FakeTaskTrackerManager taskTrackerManager) throws IOException { |
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47 | super(new JobID("test", ++jobCounter), jobConf); |
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48 | this.startTime = System.currentTimeMillis(); |
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49 | this.status = new JobStatus(getJobID(), 0f, 0f, JobStatus.PREP); |
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50 | this.status.setJobPriority(JobPriority.NORMAL); |
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51 | this.status.setStartTime(startTime); |
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52 | } |
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53 | |
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54 | @Override |
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55 | public synchronized void initTasks() throws IOException { |
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56 | try { |
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57 | int jobNumber = this.getJobID().getId(); |
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58 | synchronized (numJobsCompleted) { |
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59 | while (numJobsCompleted.get() != (NUM_JOBS - jobNumber)) { |
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60 | numJobsCompleted.wait(); |
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61 | } |
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62 | numJobsCompleted.set(numJobsCompleted.get() + 1); |
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63 | numJobsCompleted.notifyAll(); |
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64 | LOG.info("JobNumber " + jobNumber + " succeeded"); |
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65 | } |
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66 | } catch (InterruptedException ie) {}; |
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67 | this.status.setRunState(JobStatus.SUCCEEDED); |
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68 | } |
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69 | |
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70 | @Override |
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71 | synchronized void fail() { |
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72 | this.status.setRunState(JobStatus.FAILED); |
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73 | } |
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74 | } |
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75 | |
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76 | static class FakeTaskTrackerManager implements TaskTrackerManager { |
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77 | |
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78 | int maps = 0; |
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79 | int reduces = 0; |
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80 | int maxMapTasksPerTracker = 2; |
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81 | int maxReduceTasksPerTracker = 2; |
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82 | List<JobInProgressListener> listeners = |
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83 | new ArrayList<JobInProgressListener>(); |
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84 | QueueManager queueManager; |
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85 | |
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86 | private Map<String, TaskTrackerStatus> trackers = |
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87 | new HashMap<String, TaskTrackerStatus>(); |
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88 | |
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89 | public FakeTaskTrackerManager() { |
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90 | JobConf conf = new JobConf(); |
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91 | queueManager = new QueueManager(conf); |
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92 | trackers.put("tt1", new TaskTrackerStatus("tt1", "tt1.host", 1, |
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93 | new ArrayList<TaskStatus>(), 0, |
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94 | maxMapTasksPerTracker, maxReduceTasksPerTracker)); |
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95 | } |
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96 | |
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97 | public ClusterStatus getClusterStatus() { |
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98 | int numTrackers = trackers.size(); |
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99 | return new ClusterStatus(numTrackers, 0, |
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100 | JobTracker.TASKTRACKER_EXPIRY_INTERVAL, |
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101 | maps, reduces, |
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102 | numTrackers * maxMapTasksPerTracker, |
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103 | numTrackers * maxReduceTasksPerTracker, |
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104 | JobTracker.State.RUNNING); |
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105 | } |
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106 | |
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107 | public int getNumberOfUniqueHosts() { |
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108 | return 0; |
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109 | } |
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110 | |
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111 | public Collection<TaskTrackerStatus> taskTrackers() { |
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112 | return trackers.values(); |
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113 | } |
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114 | |
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115 | public void addJobInProgressListener(JobInProgressListener listener) { |
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116 | listeners.add(listener); |
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117 | } |
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118 | |
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119 | public void removeJobInProgressListener(JobInProgressListener listener) { |
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120 | listeners.remove(listener); |
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121 | } |
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122 | |
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123 | |
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124 | public QueueManager getQueueManager() { |
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125 | return queueManager; |
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126 | } |
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127 | |
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128 | public int getNextHeartbeatInterval() { |
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129 | return MRConstants.HEARTBEAT_INTERVAL_MIN; |
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130 | } |
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131 | |
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132 | public void killJob(JobID jobid) { |
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133 | return; |
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134 | } |
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135 | |
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136 | public JobInProgress getJob(JobID jobid) { |
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137 | return null; |
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138 | } |
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139 | |
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140 | public void initJob(JobInProgress job) { |
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141 | try { |
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142 | JobStatus prevStatus = (JobStatus)job.getStatus().clone(); |
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143 | job.initTasks(); |
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144 | JobStatus newStatus = (JobStatus)job.getStatus().clone(); |
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145 | if (prevStatus.getRunState() != newStatus.getRunState()) { |
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146 | JobStatusChangeEvent event = |
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147 | new JobStatusChangeEvent(job, EventType.RUN_STATE_CHANGED, prevStatus, |
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148 | newStatus); |
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149 | for (JobInProgressListener listener : listeners) { |
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150 | listener.jobUpdated(event); |
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151 | } |
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152 | } |
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153 | } catch (Exception ioe) { |
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154 | failJob(job); |
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155 | } |
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156 | } |
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157 | // Test methods |
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158 | |
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159 | public synchronized void failJob(JobInProgress job) { |
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160 | JobStatus prevStatus = (JobStatus)job.getStatus().clone(); |
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161 | job.fail(); |
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162 | JobStatus newStatus = (JobStatus)job.getStatus().clone(); |
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163 | if (prevStatus.getRunState() != newStatus.getRunState()) { |
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164 | JobStatusChangeEvent event = |
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165 | new JobStatusChangeEvent(job, EventType.RUN_STATE_CHANGED, prevStatus, |
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166 | newStatus); |
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167 | for (JobInProgressListener listener : listeners) { |
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168 | listener.jobUpdated(event); |
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169 | } |
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170 | } |
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171 | } |
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172 | |
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173 | public void submitJob(JobInProgress job) throws IOException { |
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174 | for (JobInProgressListener listener : listeners) { |
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175 | listener.jobAdded(job); |
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176 | } |
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177 | } |
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178 | } |
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179 | |
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180 | protected JobConf jobConf; |
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181 | protected TaskScheduler scheduler; |
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182 | private FakeTaskTrackerManager taskTrackerManager; |
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183 | |
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184 | @Override |
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185 | protected void setUp() throws Exception { |
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186 | resetCounters(); |
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187 | jobConf = new JobConf(); |
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188 | taskTrackerManager = new FakeTaskTrackerManager(); |
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189 | scheduler = createTaskScheduler(); |
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190 | scheduler.setConf(jobConf); |
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191 | scheduler.setTaskTrackerManager(taskTrackerManager); |
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192 | scheduler.start(); |
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193 | } |
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194 | |
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195 | @Override |
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196 | protected void tearDown() throws Exception { |
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197 | if (scheduler != null) { |
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198 | scheduler.terminate(); |
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199 | } |
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200 | } |
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201 | |
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202 | protected TaskScheduler createTaskScheduler() { |
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203 | return new JobQueueTaskScheduler(); |
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204 | } |
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205 | |
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206 | public void testParallelInitJobs() throws IOException { |
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207 | FakeJobInProgress[] jobs = new FakeJobInProgress[NUM_JOBS]; |
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208 | |
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209 | // Submit NUM_JOBS jobs in order. The init code will ensure |
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210 | // that the jobs get inited in descending order of Job ids |
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211 | // i.e. highest job id first and the smallest last. |
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212 | // If we were not doing parallel init, the first submitted job |
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213 | // will be inited first and that will hang |
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214 | |
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215 | for (int i = 0; i < NUM_JOBS; i++) { |
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216 | jobs[i] = new FakeJobInProgress(jobConf, taskTrackerManager); |
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217 | jobs[i].getStatus().setRunState(JobStatus.PREP); |
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218 | taskTrackerManager.submitJob(jobs[i]); |
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219 | } |
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220 | |
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221 | try { |
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222 | Thread.sleep(1000); |
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223 | } catch (InterruptedException ie) {} |
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224 | |
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225 | for (int i = 0; i < NUM_JOBS; i++) { |
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226 | assertTrue(jobs[i].getStatus().getRunState() == JobStatus.SUCCEEDED); |
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227 | } |
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228 | } |
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229 | } |
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