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.*; |
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21 | import junit.framework.TestCase; |
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22 | |
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23 | import org.apache.commons.logging.Log; |
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24 | import org.apache.commons.logging.LogFactory; |
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25 | import org.apache.hadoop.io.IntWritable; |
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26 | import org.apache.hadoop.io.LongWritable; |
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27 | import org.apache.hadoop.io.Text; |
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28 | import org.apache.hadoop.fs.FileSystem; |
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29 | import org.apache.hadoop.fs.Path; |
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30 | import org.apache.hadoop.mapred.lib.IdentityReducer; |
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31 | import org.apache.hadoop.conf.Configuration; |
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32 | import org.apache.hadoop.hdfs.MiniDFSCluster; |
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33 | |
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34 | /** |
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35 | * Class to test mapred task's temp directory |
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36 | */ |
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37 | public class TestMiniMRTaskTempDir extends TestCase { |
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38 | private static final Log LOG = |
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39 | LogFactory.getLog(TestMiniMRTaskTempDir.class.getName()); |
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40 | |
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41 | private MiniMRCluster mr; |
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42 | private MiniDFSCluster dfs; |
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43 | private FileSystem fileSys; |
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44 | |
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45 | /** |
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46 | * Map class which checks whether temp directory exists |
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47 | * and check the value of java.io.tmpdir |
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48 | * Creates a tempfile and checks whether that is created in |
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49 | * temp directory specified. |
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50 | */ |
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51 | public static class MapClass extends MapReduceBase |
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52 | implements Mapper<LongWritable, Text, Text, IntWritable> { |
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53 | Path tmpDir; |
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54 | FileSystem localFs; |
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55 | public void map (LongWritable key, Text value, |
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56 | OutputCollector<Text, IntWritable> output, |
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57 | Reporter reporter) throws IOException { |
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58 | String tmp = null; |
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59 | if (localFs.exists(tmpDir)) { |
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60 | tmp = tmpDir.makeQualified(localFs).toString(); |
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61 | |
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62 | assertEquals(tmp, new Path(System.getProperty("java.io.tmpdir")). |
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63 | makeQualified(localFs).toString()); |
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64 | } else { |
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65 | fail("Temp directory "+tmpDir +" doesnt exist."); |
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66 | } |
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67 | File tmpFile = File.createTempFile("test", ".tmp"); |
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68 | assertEquals(tmp, new Path(tmpFile.getParent()). |
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69 | makeQualified(localFs).toString()); |
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70 | } |
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71 | public void configure(JobConf job) { |
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72 | tmpDir = new Path(job.get("mapred.child.tmp", "./tmp")); |
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73 | try { |
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74 | localFs = FileSystem.getLocal(job); |
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75 | } catch (IOException ioe) { |
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76 | ioe.printStackTrace(); |
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77 | fail("IOException in getting localFS"); |
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78 | } |
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79 | } |
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80 | } |
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81 | |
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82 | /** |
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83 | * Launch tests |
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84 | * @param conf Configuration of the mapreduce job. |
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85 | * @param inDir input path |
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86 | * @param outDir output path |
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87 | * @param input Input text |
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88 | * @throws IOException |
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89 | */ |
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90 | public void launchTest(JobConf conf, |
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91 | Path inDir, |
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92 | Path outDir, |
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93 | String input) |
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94 | throws IOException { |
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95 | |
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96 | // set up the input file system and write input text. |
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97 | FileSystem inFs = inDir.getFileSystem(conf); |
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98 | FileSystem outFs = outDir.getFileSystem(conf); |
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99 | outFs.delete(outDir, true); |
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100 | if (!inFs.mkdirs(inDir)) { |
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101 | throw new IOException("Mkdirs failed to create " + inDir.toString()); |
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102 | } |
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103 | { |
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104 | // write input into input file |
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105 | DataOutputStream file = inFs.create(new Path(inDir, "part-0")); |
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106 | file.writeBytes(input); |
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107 | file.close(); |
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108 | } |
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109 | |
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110 | // configure the mapred Job which creates a tempfile in map. |
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111 | conf.setJobName("testmap"); |
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112 | conf.setMapperClass(MapClass.class); |
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113 | conf.setReducerClass(IdentityReducer.class); |
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114 | conf.setNumMapTasks(1); |
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115 | conf.setNumReduceTasks(0); |
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116 | FileInputFormat.setInputPaths(conf, inDir); |
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117 | FileOutputFormat.setOutputPath(conf, outDir); |
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118 | String TEST_ROOT_DIR = new Path(System.getProperty("test.build.data", |
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119 | "/tmp")).toString().replace(' ', '+'); |
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120 | conf.set("test.build.data", TEST_ROOT_DIR); |
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121 | |
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122 | // Launch job with default option for temp dir. |
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123 | // i.e. temp dir is ./tmp |
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124 | JobClient.runJob(conf); |
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125 | outFs.delete(outDir, true); |
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126 | |
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127 | // Launch job by giving relative path to temp dir. |
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128 | conf.set("mapred.child.tmp", "../temp"); |
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129 | JobClient.runJob(conf); |
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130 | outFs.delete(outDir, true); |
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131 | |
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132 | // Launch job by giving absolute path to temp dir |
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133 | conf.set("mapred.child.tmp", "/tmp"); |
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134 | JobClient.runJob(conf); |
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135 | outFs.delete(outDir, true); |
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136 | } |
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137 | |
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138 | /** |
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139 | * Tests task's temp directory. |
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140 | * |
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141 | * In this test, we give different values to mapred.child.tmp |
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142 | * both relative and absolute. And check whether the temp directory |
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143 | * is created. We also check whether java.io.tmpdir value is same as |
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144 | * the directory specified. We create a temp file and check if is is |
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145 | * created in the directory specified. |
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146 | */ |
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147 | public void testTaskTempDir(){ |
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148 | try { |
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149 | |
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150 | // create configuration, dfs, file system and mapred cluster |
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151 | dfs = new MiniDFSCluster(new Configuration(), 1, true, null); |
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152 | fileSys = dfs.getFileSystem(); |
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153 | mr = new MiniMRCluster(2, fileSys.getUri().toString(), 1); |
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154 | JobConf conf = mr.createJobConf(); |
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155 | |
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156 | // intialize input, output directories |
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157 | Path inDir = new Path("testing/wc/input"); |
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158 | Path outDir = new Path("testing/wc/output"); |
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159 | String input = "The input"; |
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160 | |
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161 | launchTest(conf, inDir, outDir, input); |
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162 | |
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163 | } catch(Exception e) { |
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164 | e.printStackTrace(); |
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165 | fail("Exception in testing temp dir"); |
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166 | // close file system and shut down dfs and mapred cluster |
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167 | try { |
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168 | if (fileSys != null) { |
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169 | fileSys.close(); |
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170 | } |
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171 | if (dfs != null) { |
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172 | dfs.shutdown(); |
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173 | } |
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174 | if (mr != null) { |
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175 | mr.shutdown(); |
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176 | } |
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177 | } catch (IOException ioe) { |
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178 | LOG.info("IO exception in closing file system)" ); |
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179 | ioe.printStackTrace(); |
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180 | } |
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181 | } |
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182 | } |
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183 | |
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184 | public static void main(String args[]){ |
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185 | TestMiniMRTaskTempDir test = new TestMiniMRTaskTempDir(); |
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186 | test.testTaskTempDir(); |
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187 | } |
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188 | } |
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