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.hdfs; |
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20 | |
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21 | import junit.framework.TestCase; |
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22 | import java.io.*; |
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23 | import java.net.InetSocketAddress; |
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24 | import java.util.Iterator; |
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25 | import java.util.LinkedList; |
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26 | import java.util.TreeMap; |
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27 | import java.util.zip.CRC32; |
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28 | |
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29 | import org.apache.hadoop.conf.Configuration; |
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30 | import org.apache.hadoop.fs.FSInputStream; |
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31 | import org.apache.hadoop.fs.FileStatus; |
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32 | import org.apache.hadoop.fs.FileUtil; |
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33 | import org.apache.hadoop.hdfs.protocol.FSConstants; |
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34 | import org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption; |
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35 | import org.apache.commons.logging.Log; |
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36 | import org.apache.commons.logging.LogFactory; |
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37 | |
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38 | /** |
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39 | * This tests data transfer protocol handling in the Datanode. It sends |
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40 | * various forms of wrong data and verifies that Datanode handles it well. |
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41 | * |
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42 | * This test uses the following two file from src/test/.../dfs directory : |
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43 | * 1) hadoop-version-dfs-dir.tgz : contains DFS directories. |
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44 | * 2) hadoop-dfs-dir.txt : checksums that are compared in this test. |
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45 | * Please read hadoop-dfs-dir.txt for more information. |
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46 | */ |
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47 | public class TestDFSUpgradeFromImage extends TestCase { |
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48 | |
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49 | private static final Log LOG = LogFactory.getLog( |
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50 | "org.apache.hadoop.hdfs.TestDFSUpgradeFromImage"); |
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51 | |
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52 | public int numDataNodes = 4; |
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53 | |
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54 | private static class ReferenceFileInfo { |
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55 | String path; |
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56 | long checksum; |
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57 | } |
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58 | |
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59 | LinkedList<ReferenceFileInfo> refList = new LinkedList<ReferenceFileInfo>(); |
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60 | Iterator<ReferenceFileInfo> refIter; |
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61 | |
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62 | boolean printChecksum = false; |
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63 | |
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64 | protected void setUp() throws IOException { |
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65 | unpackStorage(); |
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66 | } |
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67 | |
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68 | public void unpackStorage() throws IOException { |
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69 | String tarFile = System.getProperty("test.cache.data", "build/test/cache") + |
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70 | "/hadoop-14-dfs-dir.tgz"; |
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71 | String dataDir = System.getProperty("test.build.data", "build/test/data"); |
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72 | File dfsDir = new File(dataDir, "dfs"); |
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73 | if ( dfsDir.exists() && !FileUtil.fullyDelete(dfsDir) ) { |
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74 | throw new IOException("Could not delete dfs directory '" + dfsDir + "'"); |
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75 | } |
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76 | FileUtil.unTar(new File(tarFile), new File(dataDir)); |
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77 | //Now read the reference info |
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78 | |
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79 | BufferedReader reader = new BufferedReader( |
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80 | new FileReader(System.getProperty("test.cache.data", "build/test/cache") + |
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81 | "/hadoop-dfs-dir.txt")); |
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82 | String line; |
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83 | while ( (line = reader.readLine()) != null ) { |
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84 | |
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85 | line = line.trim(); |
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86 | if (line.length() <= 0 || line.startsWith("#")) { |
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87 | continue; |
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88 | } |
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89 | String[] arr = line.split("\\s+\t\\s+"); |
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90 | if (arr.length < 1) { |
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91 | continue; |
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92 | } |
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93 | if (arr[0].equals("printChecksums")) { |
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94 | printChecksum = true; |
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95 | break; |
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96 | } |
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97 | if (arr.length < 2) { |
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98 | continue; |
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99 | } |
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100 | ReferenceFileInfo info = new ReferenceFileInfo(); |
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101 | info.path = arr[0]; |
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102 | info.checksum = Long.parseLong(arr[1]); |
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103 | refList.add(info); |
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104 | } |
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105 | reader.close(); |
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106 | } |
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107 | |
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108 | private void verifyChecksum(String path, long checksum) throws IOException { |
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109 | if ( refIter == null ) { |
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110 | refIter = refList.iterator(); |
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111 | } |
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112 | |
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113 | if ( printChecksum ) { |
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114 | LOG.info("CRC info for reference file : " + path + " \t " + checksum); |
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115 | } else { |
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116 | if ( !refIter.hasNext() ) { |
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117 | throw new IOException("Checking checksum for " + path + |
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118 | "Not enough elements in the refList"); |
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119 | } |
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120 | ReferenceFileInfo info = refIter.next(); |
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121 | // The paths are expected to be listed in the same order |
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122 | // as they are traversed here. |
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123 | assertEquals(info.path, path); |
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124 | assertEquals("Checking checksum for " + path, info.checksum, checksum); |
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125 | } |
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126 | } |
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127 | |
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128 | CRC32 overallChecksum = new CRC32(); |
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129 | |
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130 | private void verifyDir(DFSClient client, String dir) |
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131 | throws IOException { |
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132 | |
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133 | FileStatus[] fileArr = client.listPaths(dir); |
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134 | TreeMap<String, Boolean> fileMap = new TreeMap<String, Boolean>(); |
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135 | |
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136 | for(FileStatus file : fileArr) { |
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137 | String path = file.getPath().toString(); |
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138 | fileMap.put(path, Boolean.valueOf(file.isDir())); |
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139 | } |
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140 | |
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141 | for(Iterator<String> it = fileMap.keySet().iterator(); it.hasNext();) { |
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142 | String path = it.next(); |
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143 | boolean isDir = fileMap.get(path); |
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144 | |
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145 | overallChecksum.update(path.getBytes()); |
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146 | |
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147 | if ( isDir ) { |
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148 | verifyDir(client, path); |
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149 | } else { |
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150 | // this is not a directory. Checksum the file data. |
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151 | CRC32 fileCRC = new CRC32(); |
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152 | FSInputStream in = client.open(path); |
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153 | byte[] buf = new byte[4096]; |
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154 | int nRead = 0; |
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155 | while ( (nRead = in.read(buf, 0, buf.length)) > 0 ) { |
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156 | fileCRC.update(buf, 0, nRead); |
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157 | } |
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158 | |
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159 | verifyChecksum(path, fileCRC.getValue()); |
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160 | } |
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161 | } |
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162 | } |
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163 | |
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164 | private void verifyFileSystem(DFSClient client) throws IOException { |
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165 | |
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166 | verifyDir(client, "/"); |
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167 | |
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168 | verifyChecksum("overallCRC", overallChecksum.getValue()); |
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169 | |
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170 | if ( printChecksum ) { |
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171 | throw new IOException("Checksums are written to log as requested. " + |
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172 | "Throwing this exception to force an error " + |
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173 | "for this test."); |
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174 | } |
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175 | } |
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176 | |
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177 | public void testUpgradeFromImage() throws IOException { |
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178 | MiniDFSCluster cluster = null; |
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179 | try { |
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180 | Configuration conf = new Configuration(); |
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181 | if (System.getProperty("test.build.data") == null) { // to allow test to be run outside of Ant |
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182 | System.setProperty("test.build.data", "build/test/data"); |
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183 | } |
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184 | conf.setInt("dfs.datanode.scan.period.hours", -1); // block scanning off |
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185 | cluster = new MiniDFSCluster(0, conf, numDataNodes, false, true, |
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186 | StartupOption.UPGRADE, null); |
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187 | cluster.waitActive(); |
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188 | DFSClient dfsClient = new DFSClient(new InetSocketAddress("localhost", |
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189 | cluster.getNameNodePort()), conf); |
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190 | //Safemode will be off only after upgrade is complete. Wait for it. |
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191 | while ( dfsClient.setSafeMode(FSConstants.SafeModeAction.SAFEMODE_GET) ) { |
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192 | LOG.info("Waiting for SafeMode to be OFF."); |
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193 | try { |
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194 | Thread.sleep(1000); |
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195 | } catch (InterruptedException ignored) {} |
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196 | } |
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197 | |
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198 | verifyFileSystem(dfsClient); |
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199 | } finally { |
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200 | if (cluster != null) { cluster.shutdown(); } |
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201 | } |
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202 | } |
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203 | } |
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