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89 | <H2> |
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91 | org.apache.hadoop.mapred</FONT> |
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92 | <BR> |
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93 | Class SkipBadRecords</H2> |
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94 | <PRE> |
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95 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A> |
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96 | <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.hadoop.mapred.SkipBadRecords</B> |
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97 | </PRE> |
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98 | <HR> |
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99 | <DL> |
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100 | <DT><PRE>public class <B>SkipBadRecords</B><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL> |
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101 | </PRE> |
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102 | |
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103 | <P> |
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104 | Utility class for skip bad records functionality. It contains various |
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105 | settings related to skipping of bad records. |
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106 | |
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107 | <p>Hadoop provides an optional mode of execution in which the bad records |
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108 | are detected and skipped in further attempts. |
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109 | |
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110 | <p>This feature can be used when map/reduce tasks crashes deterministically on |
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111 | certain input. This happens due to bugs in the map/reduce function. The usual |
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112 | course would be to fix these bugs. But sometimes this is not possible; |
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113 | perhaps the bug is in third party libraries for which the source code is |
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114 | not available. Due to this, the task never reaches to completion even with |
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115 | multiple attempts and complete data for that task is lost.</p> |
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116 | |
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117 | <p>With this feature, only a small portion of data is lost surrounding |
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118 | the bad record, which may be acceptable for some user applications. |
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119 | see <A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#setMapperMaxSkipRecords(org.apache.hadoop.conf.Configuration, long)"><CODE>setMapperMaxSkipRecords(Configuration, long)</CODE></A></p> |
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120 | |
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121 | <p>The skipping mode gets kicked off after certain no of failures |
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122 | see <A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#setAttemptsToStartSkipping(org.apache.hadoop.conf.Configuration, int)"><CODE>setAttemptsToStartSkipping(Configuration, int)</CODE></A></p> |
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123 | |
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124 | <p>In the skipping mode, the map/reduce task maintains the record range which |
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125 | is getting processed at all times. Before giving the input to the |
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126 | map/reduce function, it sends this record range to the Task tracker. |
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127 | If task crashes, the Task tracker knows which one was the last reported |
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128 | range. On further attempts that range get skipped.</p> |
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129 | <P> |
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130 | |
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131 | <P> |
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132 | <HR> |
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133 | |
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134 | <P> |
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135 | <!-- =========== FIELD SUMMARY =========== --> |
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136 | |
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137 | <A NAME="field_summary"><!-- --></A> |
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138 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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139 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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140 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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141 | <B>Field Summary</B></FONT></TH> |
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142 | </TR> |
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143 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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144 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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145 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> |
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146 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_GROUP">COUNTER_GROUP</A></B></CODE> |
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147 | |
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148 | <BR> |
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149 | Special counters which are written by the application and are |
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150 | used by the framework for detecting bad records.</TD> |
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151 | </TR> |
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152 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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153 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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154 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> |
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155 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_MAP_PROCESSED_RECORDS">COUNTER_MAP_PROCESSED_RECORDS</A></B></CODE> |
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156 | |
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157 | <BR> |
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158 | Number of processed map records.</TD> |
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159 | </TR> |
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160 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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161 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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162 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> |
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163 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_REDUCE_PROCESSED_GROUPS">COUNTER_REDUCE_PROCESSED_GROUPS</A></B></CODE> |
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164 | |
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165 | <BR> |
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166 | Number of processed reduce groups.</TD> |
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167 | </TR> |
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168 | </TABLE> |
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169 | |
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170 | <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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171 | |
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172 | <A NAME="constructor_summary"><!-- --></A> |
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173 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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174 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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175 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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176 | <B>Constructor Summary</B></FONT></TH> |
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177 | </TR> |
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178 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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179 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#SkipBadRecords()">SkipBadRecords</A></B>()</CODE> |
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180 | |
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181 | <BR> |
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182 | </TD> |
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183 | </TR> |
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184 | </TABLE> |
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185 | |
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186 | <!-- ========== METHOD SUMMARY =========== --> |
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187 | |
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188 | <A NAME="method_summary"><!-- --></A> |
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189 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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190 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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191 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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192 | <B>Method Summary</B></FONT></TH> |
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193 | </TR> |
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194 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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195 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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196 | <CODE>static int</CODE></FONT></TD> |
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197 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#getAttemptsToStartSkipping(org.apache.hadoop.conf.Configuration)">getAttemptsToStartSkipping</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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198 | |
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199 | <BR> |
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200 | Get the number of Task attempts AFTER which skip mode |
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201 | will be kicked off.</TD> |
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202 | </TR> |
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203 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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204 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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205 | <CODE>static boolean</CODE></FONT></TD> |
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206 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#getAutoIncrMapperProcCount(org.apache.hadoop.conf.Configuration)">getAutoIncrMapperProcCount</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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207 | |
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208 | <BR> |
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209 | Get the flag which if set to true, |
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210 | <A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_MAP_PROCESSED_RECORDS"><CODE>COUNTER_MAP_PROCESSED_RECORDS</CODE></A> is incremented |
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211 | by MapRunner after invoking the map function.</TD> |
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212 | </TR> |
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213 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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214 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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215 | <CODE>static boolean</CODE></FONT></TD> |
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216 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#getAutoIncrReducerProcCount(org.apache.hadoop.conf.Configuration)">getAutoIncrReducerProcCount</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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217 | |
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218 | <BR> |
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219 | Get the flag which if set to true, |
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220 | <A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_REDUCE_PROCESSED_GROUPS"><CODE>COUNTER_REDUCE_PROCESSED_GROUPS</CODE></A> is incremented |
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221 | by framework after invoking the reduce function.</TD> |
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222 | </TR> |
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223 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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224 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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225 | <CODE>static long</CODE></FONT></TD> |
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226 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#getMapperMaxSkipRecords(org.apache.hadoop.conf.Configuration)">getMapperMaxSkipRecords</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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227 | |
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228 | <BR> |
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229 | Get the number of acceptable skip records surrounding the bad record PER |
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230 | bad record in mapper.</TD> |
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231 | </TR> |
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232 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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233 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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234 | <CODE>static long</CODE></FONT></TD> |
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235 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#getReducerMaxSkipGroups(org.apache.hadoop.conf.Configuration)">getReducerMaxSkipGroups</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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236 | |
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237 | <BR> |
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238 | Get the number of acceptable skip groups surrounding the bad group PER |
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239 | bad group in reducer.</TD> |
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240 | </TR> |
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241 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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242 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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243 | <CODE>static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A></CODE></FONT></TD> |
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244 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#getSkipOutputPath(org.apache.hadoop.conf.Configuration)">getSkipOutputPath</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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245 | |
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246 | <BR> |
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247 | Get the directory to which skipped records are written.</TD> |
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248 | </TR> |
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249 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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250 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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251 | <CODE>static void</CODE></FONT></TD> |
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252 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#setAttemptsToStartSkipping(org.apache.hadoop.conf.Configuration, int)">setAttemptsToStartSkipping</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
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253 | int attemptsToStartSkipping)</CODE> |
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254 | |
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255 | <BR> |
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256 | Set the number of Task attempts AFTER which skip mode |
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257 | will be kicked off.</TD> |
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258 | </TR> |
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259 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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260 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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261 | <CODE>static void</CODE></FONT></TD> |
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262 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#setAutoIncrMapperProcCount(org.apache.hadoop.conf.Configuration, boolean)">setAutoIncrMapperProcCount</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
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263 | boolean autoIncr)</CODE> |
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264 | |
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265 | <BR> |
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266 | Set the flag which if set to true, |
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267 | <A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_MAP_PROCESSED_RECORDS"><CODE>COUNTER_MAP_PROCESSED_RECORDS</CODE></A> is incremented |
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268 | by MapRunner after invoking the map function.</TD> |
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269 | </TR> |
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270 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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271 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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272 | <CODE>static void</CODE></FONT></TD> |
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273 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#setAutoIncrReducerProcCount(org.apache.hadoop.conf.Configuration, boolean)">setAutoIncrReducerProcCount</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
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274 | boolean autoIncr)</CODE> |
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275 | |
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276 | <BR> |
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277 | Set the flag which if set to true, |
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278 | <A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_REDUCE_PROCESSED_GROUPS"><CODE>COUNTER_REDUCE_PROCESSED_GROUPS</CODE></A> is incremented |
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279 | by framework after invoking the reduce function.</TD> |
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280 | </TR> |
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281 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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282 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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283 | <CODE>static void</CODE></FONT></TD> |
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284 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#setMapperMaxSkipRecords(org.apache.hadoop.conf.Configuration, long)">setMapperMaxSkipRecords</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
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285 | long maxSkipRecs)</CODE> |
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286 | |
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287 | <BR> |
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288 | Set the number of acceptable skip records surrounding the bad record PER |
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289 | bad record in mapper.</TD> |
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290 | </TR> |
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291 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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292 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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293 | <CODE>static void</CODE></FONT></TD> |
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294 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#setReducerMaxSkipGroups(org.apache.hadoop.conf.Configuration, long)">setReducerMaxSkipGroups</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
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295 | long maxSkipGrps)</CODE> |
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296 | |
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297 | <BR> |
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298 | Set the number of acceptable skip groups surrounding the bad group PER |
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299 | bad group in reducer.</TD> |
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300 | </TR> |
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301 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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302 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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303 | <CODE>static void</CODE></FONT></TD> |
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304 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#setSkipOutputPath(org.apache.hadoop.mapred.JobConf, org.apache.hadoop.fs.Path)">setSkipOutputPath</A></B>(<A HREF="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A> conf, |
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305 | <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> path)</CODE> |
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306 | |
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307 | <BR> |
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308 | Set the directory to which skipped records are written.</TD> |
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309 | </TR> |
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310 | </TABLE> |
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311 | <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> |
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312 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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313 | <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> |
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314 | <TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH> |
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315 | </TR> |
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316 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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317 | <TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD> |
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318 | </TR> |
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319 | </TABLE> |
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320 | |
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321 | <P> |
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322 | |
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323 | <!-- ============ FIELD DETAIL =========== --> |
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324 | |
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325 | <A NAME="field_detail"><!-- --></A> |
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326 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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327 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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328 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
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329 | <B>Field Detail</B></FONT></TH> |
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330 | </TR> |
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331 | </TABLE> |
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332 | |
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333 | <A NAME="COUNTER_GROUP"><!-- --></A><H3> |
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334 | COUNTER_GROUP</H3> |
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335 | <PRE> |
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336 | public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>COUNTER_GROUP</B></PRE> |
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337 | <DL> |
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338 | <DD>Special counters which are written by the application and are |
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339 | used by the framework for detecting bad records. For detecting bad records |
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340 | these counters must be incremented by the application. |
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341 | <P> |
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342 | <DL> |
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343 | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.SkipBadRecords.COUNTER_GROUP">Constant Field Values</A></DL> |
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344 | </DL> |
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345 | <HR> |
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346 | |
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347 | <A NAME="COUNTER_MAP_PROCESSED_RECORDS"><!-- --></A><H3> |
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348 | COUNTER_MAP_PROCESSED_RECORDS</H3> |
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349 | <PRE> |
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350 | public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>COUNTER_MAP_PROCESSED_RECORDS</B></PRE> |
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351 | <DL> |
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352 | <DD>Number of processed map records. |
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353 | <P> |
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354 | <DL> |
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355 | <DT><B>See Also:</B><DD><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#getAutoIncrMapperProcCount(org.apache.hadoop.conf.Configuration)"><CODE>getAutoIncrMapperProcCount(Configuration)</CODE></A>, |
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356 | <A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.SkipBadRecords.COUNTER_MAP_PROCESSED_RECORDS">Constant Field Values</A></DL> |
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357 | </DL> |
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358 | <HR> |
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359 | |
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360 | <A NAME="COUNTER_REDUCE_PROCESSED_GROUPS"><!-- --></A><H3> |
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361 | COUNTER_REDUCE_PROCESSED_GROUPS</H3> |
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362 | <PRE> |
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363 | public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>COUNTER_REDUCE_PROCESSED_GROUPS</B></PRE> |
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364 | <DL> |
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365 | <DD>Number of processed reduce groups. |
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366 | <P> |
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367 | <DL> |
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368 | <DT><B>See Also:</B><DD><A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#getAutoIncrReducerProcCount(org.apache.hadoop.conf.Configuration)"><CODE>getAutoIncrReducerProcCount(Configuration)</CODE></A>, |
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369 | <A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.SkipBadRecords.COUNTER_REDUCE_PROCESSED_GROUPS">Constant Field Values</A></DL> |
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370 | </DL> |
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371 | |
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372 | <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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373 | |
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374 | <A NAME="constructor_detail"><!-- --></A> |
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375 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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376 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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377 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
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378 | <B>Constructor Detail</B></FONT></TH> |
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379 | </TR> |
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380 | </TABLE> |
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381 | |
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382 | <A NAME="SkipBadRecords()"><!-- --></A><H3> |
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383 | SkipBadRecords</H3> |
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384 | <PRE> |
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385 | public <B>SkipBadRecords</B>()</PRE> |
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386 | <DL> |
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387 | </DL> |
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388 | |
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389 | <!-- ============ METHOD DETAIL ========== --> |
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390 | |
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391 | <A NAME="method_detail"><!-- --></A> |
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392 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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393 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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394 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
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395 | <B>Method Detail</B></FONT></TH> |
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396 | </TR> |
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397 | </TABLE> |
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398 | |
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399 | <A NAME="getAttemptsToStartSkipping(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
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400 | getAttemptsToStartSkipping</H3> |
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401 | <PRE> |
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402 | public static int <B>getAttemptsToStartSkipping</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
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403 | <DL> |
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404 | <DD>Get the number of Task attempts AFTER which skip mode |
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405 | will be kicked off. When skip mode is kicked off, the |
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406 | tasks reports the range of records which it will process |
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407 | next to the TaskTracker. So that on failures, TT knows which |
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408 | ones are possibly the bad records. On further executions, |
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409 | those are skipped. |
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410 | Default value is 2. |
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411 | <P> |
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412 | <DD><DL> |
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413 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the configuration |
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414 | <DT><B>Returns:</B><DD>attemptsToStartSkipping no of task attempts</DL> |
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415 | </DD> |
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416 | </DL> |
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417 | <HR> |
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418 | |
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419 | <A NAME="setAttemptsToStartSkipping(org.apache.hadoop.conf.Configuration, int)"><!-- --></A><H3> |
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420 | setAttemptsToStartSkipping</H3> |
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421 | <PRE> |
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422 | public static void <B>setAttemptsToStartSkipping</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
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423 | int attemptsToStartSkipping)</PRE> |
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424 | <DL> |
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425 | <DD>Set the number of Task attempts AFTER which skip mode |
---|
426 | will be kicked off. When skip mode is kicked off, the |
---|
427 | tasks reports the range of records which it will process |
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428 | next to the TaskTracker. So that on failures, TT knows which |
---|
429 | ones are possibly the bad records. On further executions, |
---|
430 | those are skipped. |
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431 | Default value is 2. |
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432 | <P> |
---|
433 | <DD><DL> |
---|
434 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the configuration<DD><CODE>attemptsToStartSkipping</CODE> - no of task attempts</DL> |
---|
435 | </DD> |
---|
436 | </DL> |
---|
437 | <HR> |
---|
438 | |
---|
439 | <A NAME="getAutoIncrMapperProcCount(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
440 | getAutoIncrMapperProcCount</H3> |
---|
441 | <PRE> |
---|
442 | public static boolean <B>getAutoIncrMapperProcCount</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
443 | <DL> |
---|
444 | <DD>Get the flag which if set to true, |
---|
445 | <A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_MAP_PROCESSED_RECORDS"><CODE>COUNTER_MAP_PROCESSED_RECORDS</CODE></A> is incremented |
---|
446 | by MapRunner after invoking the map function. This value must be set to |
---|
447 | false for applications which process the records asynchronously |
---|
448 | or buffer the input records. For example streaming. |
---|
449 | In such cases applications should increment this counter on their own. |
---|
450 | Default value is true. |
---|
451 | <P> |
---|
452 | <DD><DL> |
---|
453 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the configuration |
---|
454 | <DT><B>Returns:</B><DD><code>true</code> if auto increment |
---|
455 | <A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_MAP_PROCESSED_RECORDS"><CODE>COUNTER_MAP_PROCESSED_RECORDS</CODE></A>. |
---|
456 | <code>false</code> otherwise.</DL> |
---|
457 | </DD> |
---|
458 | </DL> |
---|
459 | <HR> |
---|
460 | |
---|
461 | <A NAME="setAutoIncrMapperProcCount(org.apache.hadoop.conf.Configuration, boolean)"><!-- --></A><H3> |
---|
462 | setAutoIncrMapperProcCount</H3> |
---|
463 | <PRE> |
---|
464 | public static void <B>setAutoIncrMapperProcCount</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
465 | boolean autoIncr)</PRE> |
---|
466 | <DL> |
---|
467 | <DD>Set the flag which if set to true, |
---|
468 | <A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_MAP_PROCESSED_RECORDS"><CODE>COUNTER_MAP_PROCESSED_RECORDS</CODE></A> is incremented |
---|
469 | by MapRunner after invoking the map function. This value must be set to |
---|
470 | false for applications which process the records asynchronously |
---|
471 | or buffer the input records. For example streaming. |
---|
472 | In such cases applications should increment this counter on their own. |
---|
473 | Default value is true. |
---|
474 | <P> |
---|
475 | <DD><DL> |
---|
476 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the configuration<DD><CODE>autoIncr</CODE> - whether to auto increment |
---|
477 | <A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_MAP_PROCESSED_RECORDS"><CODE>COUNTER_MAP_PROCESSED_RECORDS</CODE></A>.</DL> |
---|
478 | </DD> |
---|
479 | </DL> |
---|
480 | <HR> |
---|
481 | |
---|
482 | <A NAME="getAutoIncrReducerProcCount(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
483 | getAutoIncrReducerProcCount</H3> |
---|
484 | <PRE> |
---|
485 | public static boolean <B>getAutoIncrReducerProcCount</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
486 | <DL> |
---|
487 | <DD>Get the flag which if set to true, |
---|
488 | <A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_REDUCE_PROCESSED_GROUPS"><CODE>COUNTER_REDUCE_PROCESSED_GROUPS</CODE></A> is incremented |
---|
489 | by framework after invoking the reduce function. This value must be set to |
---|
490 | false for applications which process the records asynchronously |
---|
491 | or buffer the input records. For example streaming. |
---|
492 | In such cases applications should increment this counter on their own. |
---|
493 | Default value is true. |
---|
494 | <P> |
---|
495 | <DD><DL> |
---|
496 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the configuration |
---|
497 | <DT><B>Returns:</B><DD><code>true</code> if auto increment |
---|
498 | <A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_REDUCE_PROCESSED_GROUPS"><CODE>COUNTER_REDUCE_PROCESSED_GROUPS</CODE></A>. |
---|
499 | <code>false</code> otherwise.</DL> |
---|
500 | </DD> |
---|
501 | </DL> |
---|
502 | <HR> |
---|
503 | |
---|
504 | <A NAME="setAutoIncrReducerProcCount(org.apache.hadoop.conf.Configuration, boolean)"><!-- --></A><H3> |
---|
505 | setAutoIncrReducerProcCount</H3> |
---|
506 | <PRE> |
---|
507 | public static void <B>setAutoIncrReducerProcCount</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
508 | boolean autoIncr)</PRE> |
---|
509 | <DL> |
---|
510 | <DD>Set the flag which if set to true, |
---|
511 | <A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_REDUCE_PROCESSED_GROUPS"><CODE>COUNTER_REDUCE_PROCESSED_GROUPS</CODE></A> is incremented |
---|
512 | by framework after invoking the reduce function. This value must be set to |
---|
513 | false for applications which process the records asynchronously |
---|
514 | or buffer the input records. For example streaming. |
---|
515 | In such cases applications should increment this counter on their own. |
---|
516 | Default value is true. |
---|
517 | <P> |
---|
518 | <DD><DL> |
---|
519 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the configuration<DD><CODE>autoIncr</CODE> - whether to auto increment |
---|
520 | <A HREF="../../../../org/apache/hadoop/mapred/SkipBadRecords.html#COUNTER_REDUCE_PROCESSED_GROUPS"><CODE>COUNTER_REDUCE_PROCESSED_GROUPS</CODE></A>.</DL> |
---|
521 | </DD> |
---|
522 | </DL> |
---|
523 | <HR> |
---|
524 | |
---|
525 | <A NAME="getSkipOutputPath(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
526 | getSkipOutputPath</H3> |
---|
527 | <PRE> |
---|
528 | public static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> <B>getSkipOutputPath</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
529 | <DL> |
---|
530 | <DD>Get the directory to which skipped records are written. By default it is |
---|
531 | the sub directory of the output _logs directory. |
---|
532 | User can stop writing skipped records by setting the value null. |
---|
533 | <P> |
---|
534 | <DD><DL> |
---|
535 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the configuration. |
---|
536 | <DT><B>Returns:</B><DD>path skip output directory. Null is returned if this is not set |
---|
537 | and output directory is also not set.</DL> |
---|
538 | </DD> |
---|
539 | </DL> |
---|
540 | <HR> |
---|
541 | |
---|
542 | <A NAME="setSkipOutputPath(org.apache.hadoop.mapred.JobConf, org.apache.hadoop.fs.Path)"><!-- --></A><H3> |
---|
543 | setSkipOutputPath</H3> |
---|
544 | <PRE> |
---|
545 | public static void <B>setSkipOutputPath</B>(<A HREF="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A> conf, |
---|
546 | <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> path)</PRE> |
---|
547 | <DL> |
---|
548 | <DD>Set the directory to which skipped records are written. By default it is |
---|
549 | the sub directory of the output _logs directory. |
---|
550 | User can stop writing skipped records by setting the value null. |
---|
551 | <P> |
---|
552 | <DD><DL> |
---|
553 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the configuration.<DD><CODE>path</CODE> - skip output directory path</DL> |
---|
554 | </DD> |
---|
555 | </DL> |
---|
556 | <HR> |
---|
557 | |
---|
558 | <A NAME="getMapperMaxSkipRecords(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
559 | getMapperMaxSkipRecords</H3> |
---|
560 | <PRE> |
---|
561 | public static long <B>getMapperMaxSkipRecords</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
562 | <DL> |
---|
563 | <DD>Get the number of acceptable skip records surrounding the bad record PER |
---|
564 | bad record in mapper. The number includes the bad record as well. |
---|
565 | To turn the feature of detection/skipping of bad records off, set the |
---|
566 | value to 0. |
---|
567 | The framework tries to narrow down the skipped range by retrying |
---|
568 | until this threshold is met OR all attempts get exhausted for this task. |
---|
569 | Set the value to Long.MAX_VALUE to indicate that framework need not try to |
---|
570 | narrow down. Whatever records(depends on application) get skipped are |
---|
571 | acceptable. |
---|
572 | Default value is 0. |
---|
573 | <P> |
---|
574 | <DD><DL> |
---|
575 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the configuration |
---|
576 | <DT><B>Returns:</B><DD>maxSkipRecs acceptable skip records.</DL> |
---|
577 | </DD> |
---|
578 | </DL> |
---|
579 | <HR> |
---|
580 | |
---|
581 | <A NAME="setMapperMaxSkipRecords(org.apache.hadoop.conf.Configuration, long)"><!-- --></A><H3> |
---|
582 | setMapperMaxSkipRecords</H3> |
---|
583 | <PRE> |
---|
584 | public static void <B>setMapperMaxSkipRecords</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
585 | long maxSkipRecs)</PRE> |
---|
586 | <DL> |
---|
587 | <DD>Set the number of acceptable skip records surrounding the bad record PER |
---|
588 | bad record in mapper. The number includes the bad record as well. |
---|
589 | To turn the feature of detection/skipping of bad records off, set the |
---|
590 | value to 0. |
---|
591 | The framework tries to narrow down the skipped range by retrying |
---|
592 | until this threshold is met OR all attempts get exhausted for this task. |
---|
593 | Set the value to Long.MAX_VALUE to indicate that framework need not try to |
---|
594 | narrow down. Whatever records(depends on application) get skipped are |
---|
595 | acceptable. |
---|
596 | Default value is 0. |
---|
597 | <P> |
---|
598 | <DD><DL> |
---|
599 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the configuration<DD><CODE>maxSkipRecs</CODE> - acceptable skip records.</DL> |
---|
600 | </DD> |
---|
601 | </DL> |
---|
602 | <HR> |
---|
603 | |
---|
604 | <A NAME="getReducerMaxSkipGroups(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
605 | getReducerMaxSkipGroups</H3> |
---|
606 | <PRE> |
---|
607 | public static long <B>getReducerMaxSkipGroups</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
608 | <DL> |
---|
609 | <DD>Get the number of acceptable skip groups surrounding the bad group PER |
---|
610 | bad group in reducer. The number includes the bad group as well. |
---|
611 | To turn the feature of detection/skipping of bad groups off, set the |
---|
612 | value to 0. |
---|
613 | The framework tries to narrow down the skipped range by retrying |
---|
614 | until this threshold is met OR all attempts get exhausted for this task. |
---|
615 | Set the value to Long.MAX_VALUE to indicate that framework need not try to |
---|
616 | narrow down. Whatever groups(depends on application) get skipped are |
---|
617 | acceptable. |
---|
618 | Default value is 0. |
---|
619 | <P> |
---|
620 | <DD><DL> |
---|
621 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the configuration |
---|
622 | <DT><B>Returns:</B><DD>maxSkipGrps acceptable skip groups.</DL> |
---|
623 | </DD> |
---|
624 | </DL> |
---|
625 | <HR> |
---|
626 | |
---|
627 | <A NAME="setReducerMaxSkipGroups(org.apache.hadoop.conf.Configuration, long)"><!-- --></A><H3> |
---|
628 | setReducerMaxSkipGroups</H3> |
---|
629 | <PRE> |
---|
630 | public static void <B>setReducerMaxSkipGroups</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
631 | long maxSkipGrps)</PRE> |
---|
632 | <DL> |
---|
633 | <DD>Set the number of acceptable skip groups surrounding the bad group PER |
---|
634 | bad group in reducer. The number includes the bad group as well. |
---|
635 | To turn the feature of detection/skipping of bad groups off, set the |
---|
636 | value to 0. |
---|
637 | The framework tries to narrow down the skipped range by retrying |
---|
638 | until this threshold is met OR all attempts get exhausted for this task. |
---|
639 | Set the value to Long.MAX_VALUE to indicate that framework need not try to |
---|
640 | narrow down. Whatever groups(depends on application) get skipped are |
---|
641 | acceptable. |
---|
642 | Default value is 0. |
---|
643 | <P> |
---|
644 | <DD><DL> |
---|
645 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the configuration<DD><CODE>maxSkipGrps</CODE> - acceptable skip groups.</DL> |
---|
646 | </DD> |
---|
647 | </DL> |
---|
648 | <!-- ========= END OF CLASS DATA ========= --> |
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649 | <HR> |
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650 | |
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651 | |
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652 | <!-- ======= START OF BOTTOM NAVBAR ====== --> |
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653 | <A NAME="navbar_bottom"><!-- --></A> |
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654 | <A HREF="#skip-navbar_bottom" title="Skip navigation links"></A> |
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655 | <TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> |
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656 | <TR> |
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657 | <TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> |
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658 | <A NAME="navbar_bottom_firstrow"><!-- --></A> |
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659 | <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> |
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660 | <TR ALIGN="center" VALIGN="top"> |
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661 | <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> |
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662 | <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> |
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663 | <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> |
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