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5 | <title>Hadoop 0.20.1 Release Notes</title> |
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13 | <h1>Hadoop 0.20.1 Release Notes</h1> |
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14 | These release notes include new developer and user-facing incompatibilities, features, and major improvements. The table below is sorted by Component. |
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15 | |
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16 | <a name="changes"></a> |
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17 | <h2>Changes Since Hadoop 0.20.0</h2> |
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18 | |
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19 | <h3>Common</h3> |
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20 | |
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21 | <h4> Sub-task |
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22 | </h4> |
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23 | <ul> |
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24 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-6213'>HADOOP-6213</a>] - Remove commons dependency on commons-cli2 |
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25 | </li> |
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26 | </ul> |
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27 | |
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28 | <h4> Bug |
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29 | </h4> |
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30 | <ul> |
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31 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-4626'>HADOOP-4626</a>] - API link in forrest doc should point to the same version of hadoop. |
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32 | </li> |
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33 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-4674'>HADOOP-4674</a>] - hadoop fs -help should list detailed help info for the following commands: test, text, tail, stat & touchz |
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34 | </li> |
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35 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-4856'>HADOOP-4856</a>] - Document JobInitializationPoller configuration in capacity scheduler forrest documentation. |
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36 | </li> |
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37 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-4931'>HADOOP-4931</a>] - Document TaskTracker's memory management functionality and CapacityScheduler's memory based scheduling. |
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38 | </li> |
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39 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5210'>HADOOP-5210</a>] - Reduce Task Progress shows > 100% when the total size of map outputs (for a single reducer) is high |
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40 | </li> |
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41 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5213'>HADOOP-5213</a>] - BZip2CompressionOutputStream NullPointerException |
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42 | </li> |
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43 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5349'>HADOOP-5349</a>] - When the size required for a path is -1, LocalDirAllocator.getLocalPathForWrite fails with a DiskCheckerException when the disk it selects is bad. |
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44 | </li> |
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45 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5533'>HADOOP-5533</a>] - Recovery duration shown on the jobtracker webpage is inaccurate |
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46 | </li> |
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47 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5539'>HADOOP-5539</a>] - o.a.h.mapred.Merger not maintaining map out compression on intermediate files |
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48 | </li> |
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49 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5636'>HADOOP-5636</a>] - Job is left in Running state after a killJob |
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50 | </li> |
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51 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5641'>HADOOP-5641</a>] - Possible NPE in CapacityScheduler's MemoryMatcher |
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52 | </li> |
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53 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5646'>HADOOP-5646</a>] - TestQueueCapacities is failing Hudson tests for the last few builds |
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54 | </li> |
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55 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5648'>HADOOP-5648</a>] - Not able to generate gridmix.jar on already compiled version of hadoop |
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56 | </li> |
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57 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5654'>HADOOP-5654</a>] - TestReplicationPolicy.<init> fails on java.net.BindException |
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58 | </li> |
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59 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5655'>HADOOP-5655</a>] - TestMRServerPorts fails on java.net.BindException |
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60 | </li> |
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61 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5688'>HADOOP-5688</a>] - HftpFileSystem.getChecksum(..) does not work for the paths with scheme and authority |
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62 | </li> |
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63 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5691'>HADOOP-5691</a>] - org.apache.hadoop.mapreduce.Reducer should not be abstract. |
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64 | </li> |
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65 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5711'>HADOOP-5711</a>] - Change Namenode file close log to info |
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66 | </li> |
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67 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5718'>HADOOP-5718</a>] - Capacity Scheduler should not check for presence of default queue while starting up. |
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68 | </li> |
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69 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5719'>HADOOP-5719</a>] - Jobs failed during job initalization are never removed from Capacity Schedulers waiting list |
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70 | </li> |
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71 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5736'>HADOOP-5736</a>] - Update CapacityScheduler documentation to reflect latest changes |
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72 | </li> |
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73 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5746'>HADOOP-5746</a>] - Errors encountered in MROutputThread after the last map/reduce call can go undetected |
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74 | </li> |
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75 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5796'>HADOOP-5796</a>] - DFS Write pipeline does not detect defective datanode correctly in some cases (HADOOP-3339) |
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76 | </li> |
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77 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5828'>HADOOP-5828</a>] - Use absolute path for JobTracker's mapred.local.dir in MiniMRCluster |
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78 | </li> |
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79 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5850'>HADOOP-5850</a>] - map/reduce doesn't run jobs with 0 maps |
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80 | </li> |
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81 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5863'>HADOOP-5863</a>] - mapred metrics shows negative count of waiting maps and reduces |
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82 | </li> |
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83 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5869'>HADOOP-5869</a>] - TestQueueCapacitisues.apache.org/jjira/browse/HADOOP-OP-6017</a>] - NameNode and SecondaryNameNode fail to restart because of abnormal filenames. |
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84 | </li> |
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85 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-6097'>HADOOP-6097</a>] - Multiple bugs w/ Hadoop archives |
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86 | </li> |
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87 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-6139'>HADOOP-6139</a>] - Incomplete help message is displayed for rm and rmr options. |
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88 | </li> |
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89 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-6141'>HADOOP-6141</a>] - hadoop 0.20 branch "test-patch" is broken |
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90 | </li> |
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91 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-6145'>HADOOP-6145</a>] - No error message for deleting non-existant file or directory. |
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92 | </li> |
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93 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-6215'>HADOOP-6215</a>] - fix GenericOptionParser to deal with -D with '=' in the value |
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94 | </li> |
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95 | </ul> |
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96 | |
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97 | <h4> Improvement |
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98 | </h4> |
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99 | <ul> |
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100 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5726'>HADOOP-5726</a>] - Remove pre-emption from the capacity scheduler code base |
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101 | </li> |
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102 | </ul> |
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103 | |
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104 | <h4> New Feature |
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105 | </h4> |
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106 | <ul> |
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107 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-3315'>HADOOP-3315</a>] - New binary file format |
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108 | </li> |
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109 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-5714'>HADOOP-5714</a>] - Metric to show number of fs.exists (or number of getFileInfo) calls |
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110 | </li> |
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111 | <li>[<a href='https://issues.apache.org/jira/browse/HADOOP-6080'>HADOOP-6080</a>] - Handling of Trash with quota |
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112 | </li> |
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113 | </ul> |
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114 | |
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115 | <h3>HDFS</h3> |
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116 | |
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117 | <h4> Bug |
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118 | </h4> |
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119 | <ul> |
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120 | <li>[<a href='https://issues.apache.org/jira/browse/HDFS-26'>HDFS-26</a>] - HADOOP-5862 for version .20 (Namespace quota exceeded message unclear) |
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121 | </li> |
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122 | <li>[<a href='https://issues.apache.org/jira/browse/HDFS-167'>HDFS-167</a>] - DFSClient continues to retry indefinitely |
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123 | </li> |
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124 | <li>[<a href='https://issues.apache.org/jira/browse/HDFS-438'>HDFS-438</a>] - Improve help message for quotas |
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125 | </li> |
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126 | <li>[<a href='https://issues.apache.org/jira/browse/HDFS-442'>HDFS-442</a>] - dfsthroughput in test.jar throws NPE |
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127 | </li> |
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128 | <li>[<a href='https://issues.apache.org/jira/browse/HDFS-485'>HDFS-485</a>] - error : too many fetch failures |
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129 | </li> |
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130 | <li>[<a href='https://issues.apache.org/jira/browse/HDFS-495'>HDFS-495</a>] - Hadoop FSNamesystem startFileInternal() getLease() has bug |
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131 | </li> |
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132 | <li>[<a href='https://issues.apache.org/jira/browse/HDFS-525'>HDFS-525</a>] - ListPathsServlet.java uses static SimpleDateFormat that has threading issues |
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133 | </li> |
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134 | </ul> |
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135 | |
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136 | <h4> Improvement |
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137 | </h4> |
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138 | <ul> |
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139 | <li>[<a href='https://issues.apache.org/jira/browse/HDFS-504'>HDFS-504</a>] - HDFS updates the modification time of a file when the file is closed. |
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140 | </li> |
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141 | <li>[<a href='https://issues.apache.org/jira/browse/HDFS-527'>HDFS-527</a>] - Refactor DFSClient constructors |
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142 | </li> |
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143 | </ul> |
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144 | |
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145 | <h3>Map/Reduce</h3> |
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146 | |
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147 | <h4> Bug |
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148 | </h4> |
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149 | <ul> |
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150 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-2'>MAPREDUCE-2</a>] - ArrayOutOfIndex error in KeyFieldBasedPartitioner on empty key |
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151 | </li> |
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152 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-18'>MAPREDUCE-18</a>] - Under load the shuffle sometimes gets incorrect data |
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153 | </li> |
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154 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-40'>MAPREDUCE-40</a>] - Memory management variables need a backwards compatibility option after HADOOP-5881 |
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155 | </li> |
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156 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-112'>MAPREDUCE-112</a>] - Reduce Input Records and Reduce Output Records counters are not being set when using the new Mapreduce reducer API |
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157 | </li> |
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158 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-124'>MAPREDUCE-124</a>] - When abortTask of OutputCommitter fails with an Exception for a map-only job, the task is marked as success |
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159 | </li> |
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160 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-130'>MAPREDUCE-130</a>] - Delete the jobconf copy from the log directory of the JobTracker when the job is retired |
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161 | </li> |
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162 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-179'>MAPREDUCE-179</a>] - setProgress not called for new RecordReaders |
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163 | </li> |
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164 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-383'>MAPREDUCE-383</a>] - pipes combiner does not reset properly after a spill |
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165 | </li> |
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166 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-421'>MAPREDUCE-421</a>] - mapred pipes might return exit code 0 even when failing |
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167 | </li> |
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168 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-430'>MAPREDUCE-430</a>] - Task stuck in cleanup with OutOfMemoryErrors |
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169 | </li> |
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170 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-565'>MAPREDUCE-565</a>] - Partitioner does not work with new API |
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171 | </li> |
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172 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-657'>MAPREDUCE-657</a>] - CompletedJobStatusStore hardcodes filesystem to hdfs |
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173 | </li> |
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174 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-687'>MAPREDUCE-687</a>] - TestMiniMRMapRedDebugScript fails sometimes |
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175 | </li> |
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176 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-735'>MAPREDUCE-735</a>] - ArrayIndexOutOfBoundsException is thrown by KeyFieldBasedPartitioner |
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177 | </li> |
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178 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-745'>MAPREDUCE-745</a>] - TestRecoveryManager fails sometimes |
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179 | </li> |
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180 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-796'>MAPREDUCE-796</a>] - Encountered "ClassCastException" on tasktracker while running wordcount with MultithreadedMapRunner |
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181 | </li> |
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182 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-805'>MAPREDUCE-805</a>] - Deadlock in Jobtracker |
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183 | </li> |
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184 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-806'>MAPREDUCE-806</a>] - WordCount example does not compile given the current instructions |
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185 | </li> |
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186 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-807'>MAPREDUCE-807</a>] - Stray user files in mapred.system.dir with permissions other than 777 can prevent the jobtracker from starting up. |
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187 | </li> |
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188 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-818'>MAPREDUCE-818</a>] - org.apache.hadoop.mapreduce.Counters.getGroup returns null if the group name doesnt exist. |
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189 | </li> |
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190 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-827'>MAPREDUCE-827</a>] - "hadoop job -status <jobid>" command should display job's completion status also. |
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191 | </li> |
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192 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-832'>MAPREDUCE-832</a>] - Too many WARN messages about deprecated memorty config variables in JobTacker log |
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193 | </li> |
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194 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-834'>MAPREDUCE-834</a>] - When TaskTracker config use old memory management values its memory monitoring is diabled. |
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195 | </li> |
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196 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-838'>MAPREDUCE-838</a>] - Task succeeds even when committer.commitTask fails with IOException |
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197 | </li> |
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198 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-911'>MAPREDUCE-911</a>] - TestTaskFail fail sometimes |
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199 | </li> |
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200 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-924'>MAPREDUCE-924</a>] - TestPipes crashes on trunk |
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201 | </li> |
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202 | </ul> |
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203 | |
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204 | <h4> Improvement |
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205 | </h4> |
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206 | <ul> |
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207 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-465'>MAPREDUCE-465</a>] - Deprecate org.apache.hadoop.mapred.lib.MultithreadedMapRunner |
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208 | </li> |
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209 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-487'>MAPREDUCE-487</a>] - DBInputFormat support for Oracle |
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210 | </li> |
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211 | <li>[<a href='https://issues.apache.org/jira/browse/MAPREDUCE-767'>MAPREDUCE-767</a>] - to remove mapreduce dependency on commons-cli2 |
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212 | </li> |
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213 | </ul> |
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214 | |
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215 | <h2>Changes Since Hadoop 0.19.1</h2> |
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216 | <table border="1"> |
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217 | <tr bgcolor="#DDDDDD"> |
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218 | <th align="left">Issue</th><th align="left">Component</th><th align="left">Notes</th> |
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219 | </tr> |
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220 | <tr> |
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221 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-3344">HADOOP-3344</a></td><td>build</td><td>Changed build procedure for libhdfs to build correctly for different platforms. Build instructions are in the Jira item.</td> |
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222 | </tr> |
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223 | <tr> |
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224 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4253">HADOOP-4253</a></td><td>conf</td><td>Removed from class org.apache.hadoop.fs.RawLocalFileSystem deprecated methods public String getName(), public void lock(Path p, boolean shared) and public void release(Path p).</td> |
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225 | </tr> |
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226 | <tr> |
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227 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4454">HADOOP-4454</a></td><td>conf</td><td>Changed processing of conf/slaves file to allow # to begin a comment.</td> |
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228 | </tr> |
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229 | <tr> |
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230 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4631">HADOOP-4631</a></td><td>conf</td><td>Split hadoop-default.xml into core-default.xml, hdfs-default.xml and mapreduce-default.xml.</td> |
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231 | </tr> |
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232 | <tr> |
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233 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4035">HADOOP-4035</a></td><td>contrib/capacity-sched</td><td>Changed capacity scheduler policy to take note of task memory requirements and task tracker memory availability.</td> |
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234 | </tr> |
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235 | <tr> |
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236 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4445">HADOOP-4445</a></td><td>contrib/capacity-sched</td><td>Changed JobTracker UI to better present the number of active tasks.</td> |
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237 | </tr> |
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238 | <tr> |
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239 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4576">HADOOP-4576</a></td><td>contrib/capacity-sched</td><td>Changed capacity scheduler UI to better present number of running and pending tasks.</td> |
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240 | </tr> |
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241 | <tr> |
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242 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4179">HADOOP-4179</a></td><td>contrib/chukwa</td><td>Introduced Vaidya rule based performance diagnostic tool for Map/Reduce jobs.</td> |
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243 | </tr> |
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244 | <tr> |
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245 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4827">HADOOP-4827</a></td><td>contrib/chukwa</td><td>Improved framework for data aggregation in Chuckwa.</td> |
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246 | </tr> |
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247 | <tr> |
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248 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4843">HADOOP-4843</a></td><td>contrib/chukwa</td><td>Introduced Chuckwa collection of job history.</td> |
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249 | </tr> |
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250 | <tr> |
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251 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-5030">HADOOP-5030</a></td><td>contrib/chukwa</td><td>Changed RPM install location to the value specified by build.properties file.</td> |
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252 | </tr> |
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253 | <tr> |
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254 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-5531">HADOOP-5531</a></td><td>contrib/chukwa</td><td>Disabled Chukwa unit tests for 0.20 branch only.</td> |
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255 | </tr> |
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256 | <tr> |
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257 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4789">HADOOP-4789</a></td><td>contrib/fair-share</td><td>Changed fair scheduler to divide resources equally between pools, not jobs.</td> |
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258 | </tr> |
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259 | <tr> |
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260 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4873">HADOOP-4873</a></td><td>contrib/fair-share</td><td>Changed fair scheduler UI to display minMaps and minReduces variables.</td> |
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261 | </tr> |
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262 | <tr> |
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263 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-3750">HADOOP-3750</a></td><td>dfs</td><td>Removed deprecated method parseArgs from org.apache.hadoop.fs.FileSystem.</td> |
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264 | </tr> |
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265 | <tr> |
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266 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4029">HADOOP-4029</a></td><td>dfs</td><td>Added name node storage information to the dfshealth page, and moved data node information to a separated page.</td> |
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267 | </tr> |
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268 | <tr> |
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269 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4103">HADOOP-4103</a></td><td>dfs</td><td>Modified dfsadmin -report to report under replicated blocks. blocks with corrupt replicas, and missing blocks".</td> |
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270 | </tr> |
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271 | <tr> |
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272 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4567">HADOOP-4567</a></td><td>dfs</td><td>Changed GetFileBlockLocations to return topology information for nodes that host the block replicas.</td> |
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273 | </tr> |
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274 | <tr> |
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275 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4572">HADOOP-4572</a></td><td>dfs</td><td>Moved org.apache.hadoop.hdfs.{CreateEditsLog, NNThroughputBenchmark} to org.apache.hadoop.hdfs.server.namenode.</td> |
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276 | </tr> |
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277 | <tr> |
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278 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4618">HADOOP-4618</a></td><td>dfs</td><td>Moved HTTP server from FSNameSystem to NameNode. Removed FSNamesystem.getNameNodeInfoPort(). Replaced FSNamesystem.getDFSNameNodeMachine() and FSNamesystem.getDFSNameNodePort() with new method FSNamesystem.getDFSNameNodeAddress(). Removed constructor NameNode(bindAddress, conf).</td> |
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279 | </tr> |
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280 | <tr> |
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281 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4826">HADOOP-4826</a></td><td>dfs</td><td>Introduced new dfsadmin command saveNamespace to command the name service to do an immediate save of the file system image.</td> |
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282 | </tr> |
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283 | <tr> |
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284 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4970">HADOOP-4970</a></td><td>dfs</td><td>Changed trash facility to use absolute path of the deleted file.</td> |
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285 | </tr> |
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286 | <tr> |
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287 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-5468">HADOOP-5468</a></td><td>documentation</td><td>Reformatted HTML documentation for Hadoop to use submenus at the left column.</td> |
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288 | </tr> |
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289 | <tr> |
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290 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-3497">HADOOP-3497</a></td><td>fs</td><td>Changed the semantics of file globbing with a PathFilter (using the globStatus method of FileSystem). Previously, the filtering was too restrictive, so that a glob of /*/* and a filter that only accepts /a/b would not have matched /a/b. With this change /a/b does match. </td> |
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291 | </tr> |
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292 | <tr> |
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293 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4234">HADOOP-4234</a></td><td>fs</td><td>Changed KFS glue layer to allow applications to interface with multiple KFS metaservers.</td> |
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294 | </tr> |
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295 | <tr> |
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296 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4422">HADOOP-4422</a></td><td>fs/s3</td><td>Modified Hadoop file system to no longer create S3 buckets. Applications can create buckets for their S3 file systems by other means, for example, using the JetS3t API.</td> |
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297 | </tr> |
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298 | <tr> |
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299 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-3063">HADOOP-3063</a></td><td>io</td><td>Introduced BloomMapFile subclass of MapFile that creates a Bloom filter from all keys.</td> |
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300 | </tr> |
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301 | <tr> |
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302 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-1230">HADOOP-1230</a></td><td>mapred</td><td>Replaced parameters with context obejcts in Mapper, Reducer, Partitioner, InputFormat, and OutputFormat classes.</td> |
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303 | </tr> |
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304 | <tr> |
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305 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-1650">HADOOP-1650</a></td><td>mapred</td><td>Upgraded all core servers to use Jetty 6</td> |
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306 | </tr> |
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307 | <tr> |
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308 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-3923">HADOOP-3923</a></td><td>mapred</td><td>Moved class org.apache.hadoop.mapred.StatusHttpServer to org.apache.hadoop.http.HttpServer.</td> |
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309 | </tr> |
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310 | <tr> |
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311 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-3986">HADOOP-3986</a></td><td>mapred</td><td>Removed classes org.apache.hadoop.mapred.JobShell and org.apache.hadoop.mapred.TestJobShell. Removed from JobClient methods static void setCommandLineConfig(Configuration conf) and public static Configuration getCommandLineConfig().</td> |
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312 | </tr> |
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313 | <tr> |
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314 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4188">HADOOP-4188</a></td><td>mapred</td><td>Removed Task's dependency on concrete file systems by taking list from FileSystem class. Added statistics table to FileSystem class. Deprecated FileSystem method getStatistics(Class<? extends FileSystem> cls).</td> |
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315 | </tr> |
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316 | <tr> |
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317 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4210">HADOOP-4210</a></td><td>mapred</td><td>Changed public class org.apache.hadoop.mapreduce.ID to be an abstract class. Removed from class org.apache.hadoop.mapreduce.ID the methods public static ID read(DataInput in) and public static ID forName(String str).</td> |
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318 | </tr> |
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319 | <tr> |
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320 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4305">HADOOP-4305</a></td><td>mapred</td><td>Improved TaskTracker blacklisting strategy to better exclude faulty tracker from executing tasks.</td> |
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321 | </tr> |
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322 | <tr> |
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323 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4435">HADOOP-4435</a></td><td>mapred</td><td>Changed JobTracker web status page to display the amount of heap memory in use. This changes the JobSubmissionProtocol.</td> |
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324 | </tr> |
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325 | <tr> |
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326 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4565">HADOOP-4565</a></td><td>mapred</td><td>Improved MultiFileInputFormat so that multiple blocks from the same node or same rack can be combined into a single split.</td> |
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327 | </tr> |
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328 | <tr> |
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329 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4749">HADOOP-4749</a></td><td>mapred</td><td>Added a new counter REDUCE_INPUT_BYTES.</td> |
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330 | </tr> |
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331 | <tr> |
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332 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4783">HADOOP-4783</a></td><td>mapred</td><td>Changed history directory permissions to 750 and history file permissions to 740.</td> |
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333 | </tr> |
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334 | <tr> |
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335 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-3422">HADOOP-3422</a></td><td>metrics</td><td>Changed names of ganglia metrics to avoid conflicts and to better identify source function.</td> |
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336 | </tr> |
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337 | <tr> |
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338 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4284">HADOOP-4284</a></td><td>security</td><td>Introduced HttpServer method to support global filters.</td> |
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339 | </tr> |
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340 | <tr> |
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341 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4575">HADOOP-4575</a></td><td>security</td><td>Introduced independent HSFTP proxy server for authenticated access to clusters.</td> |
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342 | </tr> |
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343 | <tr> |
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344 | <td><a href="https://issues.apache.org:443/jira/browse/HADOOP-4661">HADOOP-4661</a></td><td>tools/distcp</td><td>Introduced distch tool for parallel ch{mod, own, grp}.</td> |
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345 | </tr> |
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346 | </table> |
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347 | </body> |
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348 | </html> |
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