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7 | TaskTracker (Hadoop 0.20.1 API) |
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79 | SUMMARY: <A HREF="#nested_class_summary">NESTED</A> | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> |
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89 | <H2> |
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90 | <FONT SIZE="-1"> |
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91 | org.apache.hadoop.mapred</FONT> |
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92 | <BR> |
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93 | Class TaskTracker</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.TaskTracker</B> |
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97 | </PRE> |
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98 | <DL> |
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99 | <DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Runnable.html?is-external=true" title="class or interface in java.lang">Runnable</A></DD> |
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100 | </DL> |
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101 | <HR> |
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102 | <DL> |
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103 | <DT><PRE>public class <B>TaskTracker</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><DT>implements <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Runnable.html?is-external=true" title="class or interface in java.lang">Runnable</A></DL> |
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104 | </PRE> |
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105 | |
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106 | <P> |
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107 | TaskTracker is a process that starts and tracks MR Tasks |
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108 | in a networked environment. It contacts the JobTracker |
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109 | for Task assignments and reporting results. |
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110 | <P> |
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111 | |
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112 | <P> |
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113 | <HR> |
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114 | |
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115 | <P> |
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116 | <!-- ======== NESTED CLASS SUMMARY ======== --> |
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124 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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125 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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126 | <CODE>static class</CODE></FONT></TD> |
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127 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.MapOutputServlet.html" title="class in org.apache.hadoop.mapred">TaskTracker.MapOutputServlet</A></B></CODE> |
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128 | |
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129 | <BR> |
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130 | This class is used in TaskTracker's Jetty to serve the map outputs |
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131 | to other nodes.</TD> |
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132 | </TR> |
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133 | </TABLE> |
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134 | <!-- =========== FIELD SUMMARY =========== --> |
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135 | |
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136 | <A NAME="field_summary"><!-- --></A> |
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137 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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138 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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139 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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140 | <B>Field Summary</B></FONT></TH> |
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141 | </TR> |
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142 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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143 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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144 | <CODE>static org.apache.commons.logging.Log</CODE></FONT></TD> |
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145 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#ClientTraceLog">ClientTraceLog</A></B></CODE> |
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146 | |
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147 | <BR> |
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148 | </TD> |
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149 | </TR> |
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150 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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151 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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152 | <CODE>static int</CODE></FONT></TD> |
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153 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#CLUSTER_INCREMENT">CLUSTER_INCREMENT</A></B></CODE> |
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154 | |
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155 | <BR> |
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156 | </TD> |
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157 | </TR> |
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158 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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159 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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160 | <CODE>static long</CODE></FONT></TD> |
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161 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#COUNTER_UPDATE_INTERVAL">COUNTER_UPDATE_INTERVAL</A></B></CODE> |
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162 | |
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163 | <BR> |
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164 | </TD> |
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165 | </TR> |
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166 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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167 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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168 | <CODE>static int</CODE></FONT></TD> |
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169 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#FILE_NOT_FOUND">FILE_NOT_FOUND</A></B></CODE> |
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170 | |
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171 | <BR> |
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172 | </TD> |
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173 | </TR> |
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174 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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175 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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176 | <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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177 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#FOR_REDUCE_TASK">FOR_REDUCE_TASK</A></B></CODE> |
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178 | |
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179 | <BR> |
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180 | The reduce task number for which this map output is being transferred</TD> |
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181 | </TR> |
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182 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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183 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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184 | <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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185 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#FROM_MAP_TASK">FROM_MAP_TASK</A></B></CODE> |
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186 | |
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187 | <BR> |
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188 | The map task from which the map output data is being transferred</TD> |
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189 | </TR> |
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190 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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191 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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192 | <CODE>static int</CODE></FONT></TD> |
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193 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#HEARTBEAT_INTERVAL_MIN">HEARTBEAT_INTERVAL_MIN</A></B></CODE> |
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194 | |
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195 | <BR> |
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196 | </TD> |
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197 | </TR> |
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198 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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199 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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200 | <CODE>static org.apache.commons.logging.Log</CODE></FONT></TD> |
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201 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#LOG">LOG</A></B></CODE> |
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202 | |
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203 | <BR> |
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204 | </TD> |
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205 | </TR> |
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206 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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207 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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208 | <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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209 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#MAP_OUTPUT_LENGTH">MAP_OUTPUT_LENGTH</A></B></CODE> |
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210 | |
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211 | <BR> |
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212 | The custom http header used for the map output length.</TD> |
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213 | </TR> |
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214 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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215 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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216 | <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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217 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#MR_CLIENTTRACE_FORMAT">MR_CLIENTTRACE_FORMAT</A></B></CODE> |
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218 | |
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219 | <BR> |
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220 | </TD> |
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221 | </TR> |
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222 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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223 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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224 | <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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225 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#RAW_MAP_OUTPUT_LENGTH">RAW_MAP_OUTPUT_LENGTH</A></B></CODE> |
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226 | |
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227 | <BR> |
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228 | The custom http header used for the "raw" map output length.</TD> |
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229 | </TR> |
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230 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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231 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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232 | <CODE>static int</CODE></FONT></TD> |
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233 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#SUCCESS">SUCCESS</A></B></CODE> |
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234 | |
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235 | <BR> |
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236 | </TD> |
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237 | </TR> |
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238 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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239 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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240 | <CODE>static long</CODE></FONT></TD> |
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241 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#versionID">versionID</A></B></CODE> |
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242 | |
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243 | <BR> |
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244 | Changed the version to 2, since we have a new method getMapOutputs |
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245 | Changed version to 3 to have progress() return a boolean |
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246 | Changed the version to 4, since we have replaced |
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247 | TaskUmbilicalProtocol.progress(String, float, String, |
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248 | org.apache.hadoop.mapred.TaskStatus.Phase, Counters) |
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249 | with statusUpdate(String, TaskStatus) |
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250 | |
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251 | Version 5 changed counters representation for HADOOP-2248 |
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252 | Version 6 changes the TaskStatus representation for HADOOP-2208 |
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253 | Version 7 changes the done api (via HADOOP-3140).</TD> |
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254 | </TR> |
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255 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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256 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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257 | <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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258 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#WORKDIR">WORKDIR</A></B></CODE> |
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259 | |
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260 | <BR> |
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261 | </TD> |
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262 | </TR> |
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263 | </TABLE> |
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264 | |
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265 | <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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266 | |
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267 | <A NAME="constructor_summary"><!-- --></A> |
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268 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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269 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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270 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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271 | <B>Constructor Summary</B></FONT></TH> |
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272 | </TR> |
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273 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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274 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#TaskTracker(org.apache.hadoop.mapred.JobConf)">TaskTracker</A></B>(<A HREF="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A> conf)</CODE> |
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275 | |
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276 | <BR> |
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277 | Start with the local machine name, and the default JobTracker</TD> |
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278 | </TR> |
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279 | </TABLE> |
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280 | |
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281 | <!-- ========== METHOD SUMMARY =========== --> |
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282 | |
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283 | <A NAME="method_summary"><!-- --></A> |
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284 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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285 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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286 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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287 | <B>Method Summary</B></FONT></TH> |
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288 | </TR> |
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289 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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290 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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291 | <CODE> boolean</CODE></FONT></TD> |
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292 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#canCommit(org.apache.hadoop.mapred.TaskAttemptID)">canCommit</A></B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid)</CODE> |
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293 | |
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294 | <BR> |
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295 | Child checking whether it can commit</TD> |
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296 | </TR> |
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297 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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298 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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299 | <CODE> void</CODE></FONT></TD> |
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300 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#cleanupStorage()">cleanupStorage</A></B>()</CODE> |
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301 | |
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302 | <BR> |
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303 | Removes all contents of temporary storage.</TD> |
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304 | </TR> |
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305 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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306 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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307 | <CODE> void</CODE></FONT></TD> |
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308 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#close()">close</A></B>()</CODE> |
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309 | |
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310 | <BR> |
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311 | Close down the TaskTracker and all its components.</TD> |
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312 | </TR> |
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313 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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314 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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315 | <CODE> void</CODE></FONT></TD> |
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316 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#commitPending(org.apache.hadoop.mapred.TaskAttemptID, org.apache.hadoop.mapred.TaskStatus)">commitPending</A></B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid, |
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317 | org.apache.hadoop.mapred.TaskStatus taskStatus)</CODE> |
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318 | |
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319 | <BR> |
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320 | Task is reporting that it is in commit_pending |
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321 | and it is waiting for the commit Response</TD> |
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322 | </TR> |
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323 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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324 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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325 | <CODE> void</CODE></FONT></TD> |
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326 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#done(org.apache.hadoop.mapred.TaskAttemptID)">done</A></B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid)</CODE> |
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327 | |
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328 | <BR> |
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329 | The task is done.</TD> |
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330 | </TR> |
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331 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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332 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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333 | <CODE> void</CODE></FONT></TD> |
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334 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#fatalError(org.apache.hadoop.mapred.TaskAttemptID, java.lang.String)">fatalError</A></B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskId, |
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335 | <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> msg)</CODE> |
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336 | |
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337 | <BR> |
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338 | A child task had a fatal error.</TD> |
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339 | </TR> |
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340 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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341 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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342 | <CODE> void</CODE></FONT></TD> |
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343 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#fsError(org.apache.hadoop.mapred.TaskAttemptID, java.lang.String)">fsError</A></B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskId, |
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344 | <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> message)</CODE> |
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345 | |
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346 | <BR> |
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347 | A child task had a local filesystem error.</TD> |
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348 | </TR> |
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349 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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350 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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351 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends org.apache.hadoop.mapred.TaskTrackerInstrumentation></CODE></FONT></TD> |
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352 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#getInstrumentationClass(org.apache.hadoop.conf.Configuration)">getInstrumentationClass</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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353 | |
---|
354 | <BR> |
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355 | </TD> |
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356 | </TR> |
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357 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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358 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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359 | <CODE> org.apache.hadoop.mapred.InterTrackerProtocol</CODE></FONT></TD> |
---|
360 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#getJobClient()">getJobClient</A></B>()</CODE> |
---|
361 | |
---|
362 | <BR> |
---|
363 | The connection to the JobTracker, used by the TaskRunner |
---|
364 | for locating remote files.</TD> |
---|
365 | </TR> |
---|
366 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
367 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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368 | <CODE> org.apache.hadoop.mapred.JvmManager</CODE></FONT></TD> |
---|
369 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#getJvmManagerInstance()">getJvmManagerInstance</A></B>()</CODE> |
---|
370 | |
---|
371 | <BR> |
---|
372 | </TD> |
---|
373 | </TR> |
---|
374 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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375 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
376 | <CODE> org.apache.hadoop.mapred.MapTaskCompletionEventsUpdate</CODE></FONT></TD> |
---|
377 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#getMapCompletionEvents(org.apache.hadoop.mapred.JobID, int, int, org.apache.hadoop.mapred.TaskAttemptID)">getMapCompletionEvents</A></B>(<A HREF="../../../../org/apache/hadoop/mapred/JobID.html" title="class in org.apache.hadoop.mapred">JobID</A> jobId, |
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378 | int fromEventId, |
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379 | int maxLocs, |
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380 | <A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> id)</CODE> |
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381 | |
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382 | <BR> |
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383 | Called by a reduce task to get the map output locations for finished maps.</TD> |
---|
384 | </TR> |
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385 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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386 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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387 | <CODE> long</CODE></FONT></TD> |
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388 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#getProtocolVersion(java.lang.String, long)">getProtocolVersion</A></B>(<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> protocol, |
---|
389 | long clientVersion)</CODE> |
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390 | |
---|
391 | <BR> |
---|
392 | Return protocol version corresponding to protocol interface.</TD> |
---|
393 | </TR> |
---|
394 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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395 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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396 | <CODE> org.apache.hadoop.mapred.JvmTask</CODE></FONT></TD> |
---|
397 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#getTask(org.apache.hadoop.mapred.JVMId)">getTask</A></B>(org.apache.hadoop.mapred.JVMId jvmId)</CODE> |
---|
398 | |
---|
399 | <BR> |
---|
400 | Called upon startup by the child process, to fetch Task data.</TD> |
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401 | </TR> |
---|
402 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
403 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
404 | <CODE> org.apache.hadoop.mapred.TaskMemoryManagerThread</CODE></FONT></TD> |
---|
405 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#getTaskMemoryManager()">getTaskMemoryManager</A></B>()</CODE> |
---|
406 | |
---|
407 | <BR> |
---|
408 | </TD> |
---|
409 | </TR> |
---|
410 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
411 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
412 | <CODE> org.apache.hadoop.mapred.TaskTrackerInstrumentation</CODE></FONT></TD> |
---|
413 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#getTaskTrackerInstrumentation()">getTaskTrackerInstrumentation</A></B>()</CODE> |
---|
414 | |
---|
415 | <BR> |
---|
416 | </TD> |
---|
417 | </TR> |
---|
418 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
419 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
420 | <CODE> <A HREF="http://java.sun.com/javase/6/docs/api/java/net/InetSocketAddress.html?is-external=true" title="class or interface in java.net">InetSocketAddress</A></CODE></FONT></TD> |
---|
421 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#getTaskTrackerReportAddress()">getTaskTrackerReportAddress</A></B>()</CODE> |
---|
422 | |
---|
423 | <BR> |
---|
424 | Return the port at which the tasktracker bound to</TD> |
---|
425 | </TR> |
---|
426 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
427 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
428 | <CODE> boolean</CODE></FONT></TD> |
---|
429 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#isIdle()">isIdle</A></B>()</CODE> |
---|
430 | |
---|
431 | <BR> |
---|
432 | Is this task tracker idle?</TD> |
---|
433 | </TR> |
---|
434 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
435 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
436 | <CODE> boolean</CODE></FONT></TD> |
---|
437 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#isTaskMemoryManagerEnabled()">isTaskMemoryManagerEnabled</A></B>()</CODE> |
---|
438 | |
---|
439 | <BR> |
---|
440 | Is the TaskMemoryManager Enabled on this system?</TD> |
---|
441 | </TR> |
---|
442 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
443 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
444 | <CODE>static void</CODE></FONT></TD> |
---|
445 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#main(java.lang.String[])">main</A></B>(<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>[] argv)</CODE> |
---|
446 | |
---|
447 | <BR> |
---|
448 | Start the TaskTracker, point toward the indicated JobTracker</TD> |
---|
449 | </TR> |
---|
450 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
451 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
452 | <CODE> void</CODE></FONT></TD> |
---|
453 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#mapOutputLost(org.apache.hadoop.mapred.TaskAttemptID, java.lang.String)">mapOutputLost</A></B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid, |
---|
454 | <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> errorMsg)</CODE> |
---|
455 | |
---|
456 | <BR> |
---|
457 | A completed map task's output has been lost.</TD> |
---|
458 | </TR> |
---|
459 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
460 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
461 | <CODE> boolean</CODE></FONT></TD> |
---|
462 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#ping(org.apache.hadoop.mapred.TaskAttemptID)">ping</A></B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid)</CODE> |
---|
463 | |
---|
464 | <BR> |
---|
465 | Child checking to see if we're alive.</TD> |
---|
466 | </TR> |
---|
467 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
468 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
469 | <CODE> void</CODE></FONT></TD> |
---|
470 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#reportDiagnosticInfo(org.apache.hadoop.mapred.TaskAttemptID, java.lang.String)">reportDiagnosticInfo</A></B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid, |
---|
471 | <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> info)</CODE> |
---|
472 | |
---|
473 | <BR> |
---|
474 | Called when the task dies before completion, and we want to report back |
---|
475 | diagnostic info</TD> |
---|
476 | </TR> |
---|
477 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
478 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
479 | <CODE> void</CODE></FONT></TD> |
---|
480 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#reportNextRecordRange(org.apache.hadoop.mapred.TaskAttemptID, org.apache.hadoop.mapred.SortedRanges.Range)">reportNextRecordRange</A></B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid, |
---|
481 | org.apache.hadoop.mapred.SortedRanges.Range range)</CODE> |
---|
482 | |
---|
483 | <BR> |
---|
484 | Report the record range which is going to process next by the Task.</TD> |
---|
485 | </TR> |
---|
486 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
487 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
488 | <CODE> void</CODE></FONT></TD> |
---|
489 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#run()">run</A></B>()</CODE> |
---|
490 | |
---|
491 | <BR> |
---|
492 | The server retry loop.</TD> |
---|
493 | </TR> |
---|
494 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
495 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
496 | <CODE>static void</CODE></FONT></TD> |
---|
497 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#setInstrumentationClass(org.apache.hadoop.conf.Configuration, java.lang.Class)">setInstrumentationClass</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
498 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends org.apache.hadoop.mapred.TaskTrackerInstrumentation> t)</CODE> |
---|
499 | |
---|
500 | <BR> |
---|
501 | </TD> |
---|
502 | </TR> |
---|
503 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
504 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
505 | <CODE> void</CODE></FONT></TD> |
---|
506 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#shuffleError(org.apache.hadoop.mapred.TaskAttemptID, java.lang.String)">shuffleError</A></B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskId, |
---|
507 | <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> message)</CODE> |
---|
508 | |
---|
509 | <BR> |
---|
510 | A reduce-task failed to shuffle the map-outputs.</TD> |
---|
511 | </TR> |
---|
512 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
513 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
514 | <CODE> void</CODE></FONT></TD> |
---|
515 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#shutdown()">shutdown</A></B>()</CODE> |
---|
516 | |
---|
517 | <BR> |
---|
518 | </TD> |
---|
519 | </TR> |
---|
520 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
521 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
522 | <CODE> boolean</CODE></FONT></TD> |
---|
523 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/TaskTracker.html#statusUpdate(org.apache.hadoop.mapred.TaskAttemptID, org.apache.hadoop.mapred.TaskStatus)">statusUpdate</A></B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid, |
---|
524 | org.apache.hadoop.mapred.TaskStatus taskStatus)</CODE> |
---|
525 | |
---|
526 | <BR> |
---|
527 | Called periodically to report Task progress, from 0.0 to 1.0.</TD> |
---|
528 | </TR> |
---|
529 | </TABLE> |
---|
530 | <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> |
---|
531 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
---|
532 | <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> |
---|
533 | <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> |
---|
534 | </TR> |
---|
535 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
536 | <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> |
---|
537 | </TR> |
---|
538 | </TABLE> |
---|
539 | |
---|
540 | <P> |
---|
541 | |
---|
542 | <!-- ============ FIELD DETAIL =========== --> |
---|
543 | |
---|
544 | <A NAME="field_detail"><!-- --></A> |
---|
545 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
---|
546 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
---|
547 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
---|
548 | <B>Field Detail</B></FONT></TH> |
---|
549 | </TR> |
---|
550 | </TABLE> |
---|
551 | |
---|
552 | <A NAME="LOG"><!-- --></A><H3> |
---|
553 | LOG</H3> |
---|
554 | <PRE> |
---|
555 | public static final org.apache.commons.logging.Log <B>LOG</B></PRE> |
---|
556 | <DL> |
---|
557 | <DL> |
---|
558 | </DL> |
---|
559 | </DL> |
---|
560 | <HR> |
---|
561 | |
---|
562 | <A NAME="MR_CLIENTTRACE_FORMAT"><!-- --></A><H3> |
---|
563 | MR_CLIENTTRACE_FORMAT</H3> |
---|
564 | <PRE> |
---|
565 | 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>MR_CLIENTTRACE_FORMAT</B></PRE> |
---|
566 | <DL> |
---|
567 | <DL> |
---|
568 | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.TaskTracker.MR_CLIENTTRACE_FORMAT">Constant Field Values</A></DL> |
---|
569 | </DL> |
---|
570 | <HR> |
---|
571 | |
---|
572 | <A NAME="ClientTraceLog"><!-- --></A><H3> |
---|
573 | ClientTraceLog</H3> |
---|
574 | <PRE> |
---|
575 | public static final org.apache.commons.logging.Log <B>ClientTraceLog</B></PRE> |
---|
576 | <DL> |
---|
577 | <DL> |
---|
578 | </DL> |
---|
579 | </DL> |
---|
580 | <HR> |
---|
581 | |
---|
582 | <A NAME="HEARTBEAT_INTERVAL_MIN"><!-- --></A><H3> |
---|
583 | HEARTBEAT_INTERVAL_MIN</H3> |
---|
584 | <PRE> |
---|
585 | public static final int <B>HEARTBEAT_INTERVAL_MIN</B></PRE> |
---|
586 | <DL> |
---|
587 | <DL> |
---|
588 | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.TaskTracker.HEARTBEAT_INTERVAL_MIN">Constant Field Values</A></DL> |
---|
589 | </DL> |
---|
590 | <HR> |
---|
591 | |
---|
592 | <A NAME="CLUSTER_INCREMENT"><!-- --></A><H3> |
---|
593 | CLUSTER_INCREMENT</H3> |
---|
594 | <PRE> |
---|
595 | public static final int <B>CLUSTER_INCREMENT</B></PRE> |
---|
596 | <DL> |
---|
597 | <DL> |
---|
598 | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.TaskTracker.CLUSTER_INCREMENT">Constant Field Values</A></DL> |
---|
599 | </DL> |
---|
600 | <HR> |
---|
601 | |
---|
602 | <A NAME="COUNTER_UPDATE_INTERVAL"><!-- --></A><H3> |
---|
603 | COUNTER_UPDATE_INTERVAL</H3> |
---|
604 | <PRE> |
---|
605 | public static final long <B>COUNTER_UPDATE_INTERVAL</B></PRE> |
---|
606 | <DL> |
---|
607 | <DL> |
---|
608 | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.TaskTracker.COUNTER_UPDATE_INTERVAL">Constant Field Values</A></DL> |
---|
609 | </DL> |
---|
610 | <HR> |
---|
611 | |
---|
612 | <A NAME="SUCCESS"><!-- --></A><H3> |
---|
613 | SUCCESS</H3> |
---|
614 | <PRE> |
---|
615 | public static final int <B>SUCCESS</B></PRE> |
---|
616 | <DL> |
---|
617 | <DL> |
---|
618 | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.TaskTracker.SUCCESS">Constant Field Values</A></DL> |
---|
619 | </DL> |
---|
620 | <HR> |
---|
621 | |
---|
622 | <A NAME="FILE_NOT_FOUND"><!-- --></A><H3> |
---|
623 | FILE_NOT_FOUND</H3> |
---|
624 | <PRE> |
---|
625 | public static final int <B>FILE_NOT_FOUND</B></PRE> |
---|
626 | <DL> |
---|
627 | <DL> |
---|
628 | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.TaskTracker.FILE_NOT_FOUND">Constant Field Values</A></DL> |
---|
629 | </DL> |
---|
630 | <HR> |
---|
631 | |
---|
632 | <A NAME="MAP_OUTPUT_LENGTH"><!-- --></A><H3> |
---|
633 | MAP_OUTPUT_LENGTH</H3> |
---|
634 | <PRE> |
---|
635 | 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>MAP_OUTPUT_LENGTH</B></PRE> |
---|
636 | <DL> |
---|
637 | <DD>The custom http header used for the map output length. |
---|
638 | <P> |
---|
639 | <DL> |
---|
640 | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.TaskTracker.MAP_OUTPUT_LENGTH">Constant Field Values</A></DL> |
---|
641 | </DL> |
---|
642 | <HR> |
---|
643 | |
---|
644 | <A NAME="RAW_MAP_OUTPUT_LENGTH"><!-- --></A><H3> |
---|
645 | RAW_MAP_OUTPUT_LENGTH</H3> |
---|
646 | <PRE> |
---|
647 | 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>RAW_MAP_OUTPUT_LENGTH</B></PRE> |
---|
648 | <DL> |
---|
649 | <DD>The custom http header used for the "raw" map output length. |
---|
650 | <P> |
---|
651 | <DL> |
---|
652 | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.TaskTracker.RAW_MAP_OUTPUT_LENGTH">Constant Field Values</A></DL> |
---|
653 | </DL> |
---|
654 | <HR> |
---|
655 | |
---|
656 | <A NAME="FROM_MAP_TASK"><!-- --></A><H3> |
---|
657 | FROM_MAP_TASK</H3> |
---|
658 | <PRE> |
---|
659 | 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>FROM_MAP_TASK</B></PRE> |
---|
660 | <DL> |
---|
661 | <DD>The map task from which the map output data is being transferred |
---|
662 | <P> |
---|
663 | <DL> |
---|
664 | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.TaskTracker.FROM_MAP_TASK">Constant Field Values</A></DL> |
---|
665 | </DL> |
---|
666 | <HR> |
---|
667 | |
---|
668 | <A NAME="FOR_REDUCE_TASK"><!-- --></A><H3> |
---|
669 | FOR_REDUCE_TASK</H3> |
---|
670 | <PRE> |
---|
671 | 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>FOR_REDUCE_TASK</B></PRE> |
---|
672 | <DL> |
---|
673 | <DD>The reduce task number for which this map output is being transferred |
---|
674 | <P> |
---|
675 | <DL> |
---|
676 | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.TaskTracker.FOR_REDUCE_TASK">Constant Field Values</A></DL> |
---|
677 | </DL> |
---|
678 | <HR> |
---|
679 | |
---|
680 | <A NAME="WORKDIR"><!-- --></A><H3> |
---|
681 | WORKDIR</H3> |
---|
682 | <PRE> |
---|
683 | 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>WORKDIR</B></PRE> |
---|
684 | <DL> |
---|
685 | <DL> |
---|
686 | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.TaskTracker.WORKDIR">Constant Field Values</A></DL> |
---|
687 | </DL> |
---|
688 | <HR> |
---|
689 | |
---|
690 | <A NAME="versionID"><!-- --></A><H3> |
---|
691 | versionID</H3> |
---|
692 | <PRE> |
---|
693 | public static final long <B>versionID</B></PRE> |
---|
694 | <DL> |
---|
695 | <DD>Changed the version to 2, since we have a new method getMapOutputs |
---|
696 | Changed version to 3 to have progress() return a boolean |
---|
697 | Changed the version to 4, since we have replaced |
---|
698 | TaskUmbilicalProtocol.progress(String, float, String, |
---|
699 | org.apache.hadoop.mapred.TaskStatus.Phase, Counters) |
---|
700 | with statusUpdate(String, TaskStatus) |
---|
701 | |
---|
702 | Version 5 changed counters representation for HADOOP-2248 |
---|
703 | Version 6 changes the TaskStatus representation for HADOOP-2208 |
---|
704 | Version 7 changes the done api (via HADOOP-3140). It now expects whether |
---|
705 | or not the task's output needs to be promoted. |
---|
706 | Version 8 changes {job|tip|task}id's to use their corresponding |
---|
707 | objects rather than strings. |
---|
708 | Version 9 changes the counter representation for HADOOP-1915 |
---|
709 | Version 10 changed the TaskStatus format and added reportNextRecordRange |
---|
710 | for HADOOP-153 |
---|
711 | Version 11 Adds RPCs for task commit as part of HADOOP-3150 |
---|
712 | Version 12 getMapCompletionEvents() now also indicates if the events are |
---|
713 | stale or not. Hence the return type is a class that |
---|
714 | encapsulates the events and whether to reset events index. |
---|
715 | Version 13 changed the getTask method signature for HADOOP-249 |
---|
716 | Version 14 changed the getTask method signature for HADOOP-4232 |
---|
717 | Version 15 Adds FAILED_UNCLEAN and KILLED_UNCLEAN states for HADOOP-4759 |
---|
718 | Version 16 Added fatalError for child to communicate fatal errors to TT |
---|
719 | <P> |
---|
720 | <DL> |
---|
721 | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.mapred.TaskTracker.versionID">Constant Field Values</A></DL> |
---|
722 | </DL> |
---|
723 | |
---|
724 | <!-- ========= CONSTRUCTOR DETAIL ======== --> |
---|
725 | |
---|
726 | <A NAME="constructor_detail"><!-- --></A> |
---|
727 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
---|
728 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
---|
729 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
---|
730 | <B>Constructor Detail</B></FONT></TH> |
---|
731 | </TR> |
---|
732 | </TABLE> |
---|
733 | |
---|
734 | <A NAME="TaskTracker(org.apache.hadoop.mapred.JobConf)"><!-- --></A><H3> |
---|
735 | TaskTracker</H3> |
---|
736 | <PRE> |
---|
737 | public <B>TaskTracker</B>(<A HREF="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A> conf) |
---|
738 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
739 | <DL> |
---|
740 | <DD>Start with the local machine name, and the default JobTracker |
---|
741 | <P> |
---|
742 | <DL> |
---|
743 | |
---|
744 | <DT><B>Throws:</B> |
---|
745 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
746 | </DL> |
---|
747 | |
---|
748 | <!-- ============ METHOD DETAIL ========== --> |
---|
749 | |
---|
750 | <A NAME="method_detail"><!-- --></A> |
---|
751 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
---|
752 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
---|
753 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
---|
754 | <B>Method Detail</B></FONT></TH> |
---|
755 | </TR> |
---|
756 | </TABLE> |
---|
757 | |
---|
758 | <A NAME="getTaskTrackerInstrumentation()"><!-- --></A><H3> |
---|
759 | getTaskTrackerInstrumentation</H3> |
---|
760 | <PRE> |
---|
761 | public org.apache.hadoop.mapred.TaskTrackerInstrumentation <B>getTaskTrackerInstrumentation</B>()</PRE> |
---|
762 | <DL> |
---|
763 | <DD><DL> |
---|
764 | </DL> |
---|
765 | </DD> |
---|
766 | <DD><DL> |
---|
767 | </DL> |
---|
768 | </DD> |
---|
769 | </DL> |
---|
770 | <HR> |
---|
771 | |
---|
772 | <A NAME="getProtocolVersion(java.lang.String, long)"><!-- --></A><H3> |
---|
773 | getProtocolVersion</H3> |
---|
774 | <PRE> |
---|
775 | public long <B>getProtocolVersion</B>(<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> protocol, |
---|
776 | long clientVersion) |
---|
777 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
778 | <DL> |
---|
779 | <DD><B>Description copied from interface: <CODE><A HREF="../../../../org/apache/hadoop/ipc/VersionedProtocol.html#getProtocolVersion(java.lang.String, long)">VersionedProtocol</A></CODE></B></DD> |
---|
780 | <DD>Return protocol version corresponding to protocol interface. |
---|
781 | <P> |
---|
782 | <DD><DL> |
---|
783 | </DL> |
---|
784 | </DD> |
---|
785 | <DD><DL> |
---|
786 | <DT><B>Parameters:</B><DD><CODE>protocol</CODE> - The classname of the protocol interface<DD><CODE>clientVersion</CODE> - The version of the protocol that the client speaks |
---|
787 | <DT><B>Returns:</B><DD>the version that the server will speak |
---|
788 | <DT><B>Throws:</B> |
---|
789 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
790 | </DD> |
---|
791 | </DL> |
---|
792 | <HR> |
---|
793 | |
---|
794 | <A NAME="getInstrumentationClass(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
795 | getInstrumentationClass</H3> |
---|
796 | <PRE> |
---|
797 | public static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends org.apache.hadoop.mapred.TaskTrackerInstrumentation> <B>getInstrumentationClass</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
798 | <DL> |
---|
799 | <DD><DL> |
---|
800 | </DL> |
---|
801 | </DD> |
---|
802 | <DD><DL> |
---|
803 | </DL> |
---|
804 | </DD> |
---|
805 | </DL> |
---|
806 | <HR> |
---|
807 | |
---|
808 | <A NAME="setInstrumentationClass(org.apache.hadoop.conf.Configuration, java.lang.Class)"><!-- --></A><H3> |
---|
809 | setInstrumentationClass</H3> |
---|
810 | <PRE> |
---|
811 | public static void <B>setInstrumentationClass</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
812 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends org.apache.hadoop.mapred.TaskTrackerInstrumentation> t)</PRE> |
---|
813 | <DL> |
---|
814 | <DD><DL> |
---|
815 | </DL> |
---|
816 | </DD> |
---|
817 | <DD><DL> |
---|
818 | </DL> |
---|
819 | </DD> |
---|
820 | </DL> |
---|
821 | <HR> |
---|
822 | |
---|
823 | <A NAME="cleanupStorage()"><!-- --></A><H3> |
---|
824 | cleanupStorage</H3> |
---|
825 | <PRE> |
---|
826 | public void <B>cleanupStorage</B>() |
---|
827 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
828 | <DL> |
---|
829 | <DD>Removes all contents of temporary storage. Called upon |
---|
830 | startup, to remove any leftovers from previous run. |
---|
831 | <P> |
---|
832 | <DD><DL> |
---|
833 | </DL> |
---|
834 | </DD> |
---|
835 | <DD><DL> |
---|
836 | |
---|
837 | <DT><B>Throws:</B> |
---|
838 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
839 | </DD> |
---|
840 | </DL> |
---|
841 | <HR> |
---|
842 | |
---|
843 | <A NAME="shutdown()"><!-- --></A><H3> |
---|
844 | shutdown</H3> |
---|
845 | <PRE> |
---|
846 | public void <B>shutdown</B>() |
---|
847 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
848 | <DL> |
---|
849 | <DD><DL> |
---|
850 | </DL> |
---|
851 | </DD> |
---|
852 | <DD><DL> |
---|
853 | |
---|
854 | <DT><B>Throws:</B> |
---|
855 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
856 | </DD> |
---|
857 | </DL> |
---|
858 | <HR> |
---|
859 | |
---|
860 | <A NAME="close()"><!-- --></A><H3> |
---|
861 | close</H3> |
---|
862 | <PRE> |
---|
863 | public void <B>close</B>() |
---|
864 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
865 | <DL> |
---|
866 | <DD>Close down the TaskTracker and all its components. We must also shutdown |
---|
867 | any running tasks or threads, and cleanup disk space. A new TaskTracker |
---|
868 | within the same process space might be restarted, so everything must be |
---|
869 | clean. |
---|
870 | <P> |
---|
871 | <DD><DL> |
---|
872 | </DL> |
---|
873 | </DD> |
---|
874 | <DD><DL> |
---|
875 | |
---|
876 | <DT><B>Throws:</B> |
---|
877 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
878 | </DD> |
---|
879 | </DL> |
---|
880 | <HR> |
---|
881 | |
---|
882 | <A NAME="getJobClient()"><!-- --></A><H3> |
---|
883 | getJobClient</H3> |
---|
884 | <PRE> |
---|
885 | public org.apache.hadoop.mapred.InterTrackerProtocol <B>getJobClient</B>()</PRE> |
---|
886 | <DL> |
---|
887 | <DD>The connection to the JobTracker, used by the TaskRunner |
---|
888 | for locating remote files. |
---|
889 | <P> |
---|
890 | <DD><DL> |
---|
891 | </DL> |
---|
892 | </DD> |
---|
893 | <DD><DL> |
---|
894 | </DL> |
---|
895 | </DD> |
---|
896 | </DL> |
---|
897 | <HR> |
---|
898 | |
---|
899 | <A NAME="getTaskTrackerReportAddress()"><!-- --></A><H3> |
---|
900 | getTaskTrackerReportAddress</H3> |
---|
901 | <PRE> |
---|
902 | public <A HREF="http://java.sun.com/javase/6/docs/api/java/net/InetSocketAddress.html?is-external=true" title="class or interface in java.net">InetSocketAddress</A> <B>getTaskTrackerReportAddress</B>()</PRE> |
---|
903 | <DL> |
---|
904 | <DD>Return the port at which the tasktracker bound to |
---|
905 | <P> |
---|
906 | <DD><DL> |
---|
907 | </DL> |
---|
908 | </DD> |
---|
909 | <DD><DL> |
---|
910 | </DL> |
---|
911 | </DD> |
---|
912 | </DL> |
---|
913 | <HR> |
---|
914 | |
---|
915 | <A NAME="getJvmManagerInstance()"><!-- --></A><H3> |
---|
916 | getJvmManagerInstance</H3> |
---|
917 | <PRE> |
---|
918 | public org.apache.hadoop.mapred.JvmManager <B>getJvmManagerInstance</B>()</PRE> |
---|
919 | <DL> |
---|
920 | <DD><DL> |
---|
921 | </DL> |
---|
922 | </DD> |
---|
923 | <DD><DL> |
---|
924 | </DL> |
---|
925 | </DD> |
---|
926 | </DL> |
---|
927 | <HR> |
---|
928 | |
---|
929 | <A NAME="run()"><!-- --></A><H3> |
---|
930 | run</H3> |
---|
931 | <PRE> |
---|
932 | public void <B>run</B>()</PRE> |
---|
933 | <DL> |
---|
934 | <DD>The server retry loop. |
---|
935 | This while-loop attempts to connect to the JobTracker. It only |
---|
936 | loops when the old TaskTracker has gone bad (its state is |
---|
937 | stale somehow) and we need to reinitialize everything. |
---|
938 | <P> |
---|
939 | <DD><DL> |
---|
940 | <DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Runnable.html?is-external=true#run()" title="class or interface in java.lang">run</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Runnable.html?is-external=true" title="class or interface in java.lang">Runnable</A></CODE></DL> |
---|
941 | </DD> |
---|
942 | <DD><DL> |
---|
943 | </DL> |
---|
944 | </DD> |
---|
945 | </DL> |
---|
946 | <HR> |
---|
947 | |
---|
948 | <A NAME="getTask(org.apache.hadoop.mapred.JVMId)"><!-- --></A><H3> |
---|
949 | getTask</H3> |
---|
950 | <PRE> |
---|
951 | public org.apache.hadoop.mapred.JvmTask <B>getTask</B>(org.apache.hadoop.mapred.JVMId jvmId) |
---|
952 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
953 | <DL> |
---|
954 | <DD>Called upon startup by the child process, to fetch Task data. |
---|
955 | <P> |
---|
956 | <DD><DL> |
---|
957 | </DL> |
---|
958 | </DD> |
---|
959 | <DD><DL> |
---|
960 | <DT><B>Parameters:</B><DD><CODE>jvmId</CODE> - the ID of this JVM w.r.t the tasktracker that launched it |
---|
961 | <DT><B>Returns:</B><DD>Task object |
---|
962 | <DT><B>Throws:</B> |
---|
963 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
964 | </DD> |
---|
965 | </DL> |
---|
966 | <HR> |
---|
967 | |
---|
968 | <A NAME="statusUpdate(org.apache.hadoop.mapred.TaskAttemptID, org.apache.hadoop.mapred.TaskStatus)"><!-- --></A><H3> |
---|
969 | statusUpdate</H3> |
---|
970 | <PRE> |
---|
971 | public boolean <B>statusUpdate</B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid, |
---|
972 | org.apache.hadoop.mapred.TaskStatus taskStatus) |
---|
973 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
974 | <DL> |
---|
975 | <DD>Called periodically to report Task progress, from 0.0 to 1.0. |
---|
976 | <P> |
---|
977 | <DD><DL> |
---|
978 | </DL> |
---|
979 | </DD> |
---|
980 | <DD><DL> |
---|
981 | <DT><B>Parameters:</B><DD><CODE>taskid</CODE> - task-id of the child<DD><CODE>taskStatus</CODE> - status of the child |
---|
982 | <DT><B>Returns:</B><DD>True if the task is known |
---|
983 | <DT><B>Throws:</B> |
---|
984 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
985 | </DD> |
---|
986 | </DL> |
---|
987 | <HR> |
---|
988 | |
---|
989 | <A NAME="reportDiagnosticInfo(org.apache.hadoop.mapred.TaskAttemptID, java.lang.String)"><!-- --></A><H3> |
---|
990 | reportDiagnosticInfo</H3> |
---|
991 | <PRE> |
---|
992 | public void <B>reportDiagnosticInfo</B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid, |
---|
993 | <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> info) |
---|
994 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
995 | <DL> |
---|
996 | <DD>Called when the task dies before completion, and we want to report back |
---|
997 | diagnostic info |
---|
998 | <P> |
---|
999 | <DD><DL> |
---|
1000 | </DL> |
---|
1001 | </DD> |
---|
1002 | <DD><DL> |
---|
1003 | <DT><B>Parameters:</B><DD><CODE>taskid</CODE> - the id of the task involved<DD><CODE>info</CODE> - the text to report |
---|
1004 | <DT><B>Throws:</B> |
---|
1005 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
1006 | </DD> |
---|
1007 | </DL> |
---|
1008 | <HR> |
---|
1009 | |
---|
1010 | <A NAME="reportNextRecordRange(org.apache.hadoop.mapred.TaskAttemptID, org.apache.hadoop.mapred.SortedRanges.Range)"><!-- --></A><H3> |
---|
1011 | reportNextRecordRange</H3> |
---|
1012 | <PRE> |
---|
1013 | public void <B>reportNextRecordRange</B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid, |
---|
1014 | org.apache.hadoop.mapred.SortedRanges.Range range) |
---|
1015 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
1016 | <DL> |
---|
1017 | <DD>Report the record range which is going to process next by the Task. |
---|
1018 | <P> |
---|
1019 | <DD><DL> |
---|
1020 | </DL> |
---|
1021 | </DD> |
---|
1022 | <DD><DL> |
---|
1023 | <DT><B>Parameters:</B><DD><CODE>taskid</CODE> - the id of the task involved<DD><CODE>range</CODE> - the range of record sequence nos |
---|
1024 | <DT><B>Throws:</B> |
---|
1025 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
1026 | </DD> |
---|
1027 | </DL> |
---|
1028 | <HR> |
---|
1029 | |
---|
1030 | <A NAME="ping(org.apache.hadoop.mapred.TaskAttemptID)"><!-- --></A><H3> |
---|
1031 | ping</H3> |
---|
1032 | <PRE> |
---|
1033 | public boolean <B>ping</B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid) |
---|
1034 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
1035 | <DL> |
---|
1036 | <DD>Child checking to see if we're alive. Normally does nothing. |
---|
1037 | <P> |
---|
1038 | <DD><DL> |
---|
1039 | </DL> |
---|
1040 | </DD> |
---|
1041 | <DD><DL> |
---|
1042 | |
---|
1043 | <DT><B>Returns:</B><DD>True if the task is known |
---|
1044 | <DT><B>Throws:</B> |
---|
1045 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
1046 | </DD> |
---|
1047 | </DL> |
---|
1048 | <HR> |
---|
1049 | |
---|
1050 | <A NAME="commitPending(org.apache.hadoop.mapred.TaskAttemptID, org.apache.hadoop.mapred.TaskStatus)"><!-- --></A><H3> |
---|
1051 | commitPending</H3> |
---|
1052 | <PRE> |
---|
1053 | public void <B>commitPending</B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid, |
---|
1054 | org.apache.hadoop.mapred.TaskStatus taskStatus) |
---|
1055 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
1056 | <DL> |
---|
1057 | <DD>Task is reporting that it is in commit_pending |
---|
1058 | and it is waiting for the commit Response |
---|
1059 | <P> |
---|
1060 | <DD><DL> |
---|
1061 | </DL> |
---|
1062 | </DD> |
---|
1063 | <DD><DL> |
---|
1064 | <DT><B>Parameters:</B><DD><CODE>taskid</CODE> - task's id<DD><CODE>taskStatus</CODE> - status of the child |
---|
1065 | <DT><B>Throws:</B> |
---|
1066 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
1067 | </DD> |
---|
1068 | </DL> |
---|
1069 | <HR> |
---|
1070 | |
---|
1071 | <A NAME="canCommit(org.apache.hadoop.mapred.TaskAttemptID)"><!-- --></A><H3> |
---|
1072 | canCommit</H3> |
---|
1073 | <PRE> |
---|
1074 | public boolean <B>canCommit</B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid)</PRE> |
---|
1075 | <DL> |
---|
1076 | <DD>Child checking whether it can commit |
---|
1077 | <P> |
---|
1078 | <DD><DL> |
---|
1079 | </DL> |
---|
1080 | </DD> |
---|
1081 | <DD><DL> |
---|
1082 | |
---|
1083 | <DT><B>Returns:</B><DD>true/false</DL> |
---|
1084 | </DD> |
---|
1085 | </DL> |
---|
1086 | <HR> |
---|
1087 | |
---|
1088 | <A NAME="done(org.apache.hadoop.mapred.TaskAttemptID)"><!-- --></A><H3> |
---|
1089 | done</H3> |
---|
1090 | <PRE> |
---|
1091 | public void <B>done</B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid) |
---|
1092 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
1093 | <DL> |
---|
1094 | <DD>The task is done. |
---|
1095 | <P> |
---|
1096 | <DD><DL> |
---|
1097 | </DL> |
---|
1098 | </DD> |
---|
1099 | <DD><DL> |
---|
1100 | <DT><B>Parameters:</B><DD><CODE>taskid</CODE> - task's id |
---|
1101 | <DT><B>Throws:</B> |
---|
1102 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
1103 | </DD> |
---|
1104 | </DL> |
---|
1105 | <HR> |
---|
1106 | |
---|
1107 | <A NAME="shuffleError(org.apache.hadoop.mapred.TaskAttemptID, java.lang.String)"><!-- --></A><H3> |
---|
1108 | shuffleError</H3> |
---|
1109 | <PRE> |
---|
1110 | public void <B>shuffleError</B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskId, |
---|
1111 | <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> message) |
---|
1112 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
1113 | <DL> |
---|
1114 | <DD>A reduce-task failed to shuffle the map-outputs. Kill the task. |
---|
1115 | <P> |
---|
1116 | <DD><DL> |
---|
1117 | </DL> |
---|
1118 | </DD> |
---|
1119 | <DD><DL> |
---|
1120 | |
---|
1121 | <DT><B>Throws:</B> |
---|
1122 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
1123 | </DD> |
---|
1124 | </DL> |
---|
1125 | <HR> |
---|
1126 | |
---|
1127 | <A NAME="fsError(org.apache.hadoop.mapred.TaskAttemptID, java.lang.String)"><!-- --></A><H3> |
---|
1128 | fsError</H3> |
---|
1129 | <PRE> |
---|
1130 | public void <B>fsError</B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskId, |
---|
1131 | <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> message) |
---|
1132 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
1133 | <DL> |
---|
1134 | <DD>A child task had a local filesystem error. Kill the task. |
---|
1135 | <P> |
---|
1136 | <DD><DL> |
---|
1137 | </DL> |
---|
1138 | </DD> |
---|
1139 | <DD><DL> |
---|
1140 | |
---|
1141 | <DT><B>Throws:</B> |
---|
1142 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
1143 | </DD> |
---|
1144 | </DL> |
---|
1145 | <HR> |
---|
1146 | |
---|
1147 | <A NAME="fatalError(org.apache.hadoop.mapred.TaskAttemptID, java.lang.String)"><!-- --></A><H3> |
---|
1148 | fatalError</H3> |
---|
1149 | <PRE> |
---|
1150 | public void <B>fatalError</B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskId, |
---|
1151 | <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> msg) |
---|
1152 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
1153 | <DL> |
---|
1154 | <DD>A child task had a fatal error. Kill the task. |
---|
1155 | <P> |
---|
1156 | <DD><DL> |
---|
1157 | </DL> |
---|
1158 | </DD> |
---|
1159 | <DD><DL> |
---|
1160 | |
---|
1161 | <DT><B>Throws:</B> |
---|
1162 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
1163 | </DD> |
---|
1164 | </DL> |
---|
1165 | <HR> |
---|
1166 | |
---|
1167 | <A NAME="getMapCompletionEvents(org.apache.hadoop.mapred.JobID, int, int, org.apache.hadoop.mapred.TaskAttemptID)"><!-- --></A><H3> |
---|
1168 | getMapCompletionEvents</H3> |
---|
1169 | <PRE> |
---|
1170 | public org.apache.hadoop.mapred.MapTaskCompletionEventsUpdate <B>getMapCompletionEvents</B>(<A HREF="../../../../org/apache/hadoop/mapred/JobID.html" title="class in org.apache.hadoop.mapred">JobID</A> jobId, |
---|
1171 | int fromEventId, |
---|
1172 | int maxLocs, |
---|
1173 | <A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> id) |
---|
1174 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
1175 | <DL> |
---|
1176 | <DD>Called by a reduce task to get the map output locations for finished maps. |
---|
1177 | Returns an update centered around the map-task-completion-events. |
---|
1178 | The update also piggybacks the information whether the events copy at the |
---|
1179 | task-tracker has changed or not. This will trigger some action at the |
---|
1180 | child-process. |
---|
1181 | <P> |
---|
1182 | <DD><DL> |
---|
1183 | </DL> |
---|
1184 | </DD> |
---|
1185 | <DD><DL> |
---|
1186 | <DD><CODE>fromEventId</CODE> - the index starting from which the locations should be |
---|
1187 | fetched<DD><CODE>maxLocs</CODE> - the max number of locations to fetch<DD><CODE>id</CODE> - The attempt id of the task that is trying to communicate |
---|
1188 | <DT><B>Returns:</B><DD>A <CODE>MapTaskCompletionEventsUpdate</CODE> |
---|
1189 | <DT><B>Throws:</B> |
---|
1190 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
1191 | </DD> |
---|
1192 | </DL> |
---|
1193 | <HR> |
---|
1194 | |
---|
1195 | <A NAME="mapOutputLost(org.apache.hadoop.mapred.TaskAttemptID, java.lang.String)"><!-- --></A><H3> |
---|
1196 | mapOutputLost</H3> |
---|
1197 | <PRE> |
---|
1198 | public void <B>mapOutputLost</B>(<A HREF="../../../../org/apache/hadoop/mapred/TaskAttemptID.html" title="class in org.apache.hadoop.mapred">TaskAttemptID</A> taskid, |
---|
1199 | <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> errorMsg) |
---|
1200 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
1201 | <DL> |
---|
1202 | <DD>A completed map task's output has been lost. |
---|
1203 | <P> |
---|
1204 | <DD><DL> |
---|
1205 | </DL> |
---|
1206 | </DD> |
---|
1207 | <DD><DL> |
---|
1208 | |
---|
1209 | <DT><B>Throws:</B> |
---|
1210 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
1211 | </DD> |
---|
1212 | </DL> |
---|
1213 | <HR> |
---|
1214 | |
---|
1215 | <A NAME="isIdle()"><!-- --></A><H3> |
---|
1216 | isIdle</H3> |
---|
1217 | <PRE> |
---|
1218 | public boolean <B>isIdle</B>()</PRE> |
---|
1219 | <DL> |
---|
1220 | <DD>Is this task tracker idle? |
---|
1221 | <P> |
---|
1222 | <DD><DL> |
---|
1223 | </DL> |
---|
1224 | </DD> |
---|
1225 | <DD><DL> |
---|
1226 | |
---|
1227 | <DT><B>Returns:</B><DD>has this task tracker finished and cleaned up all of its tasks?</DL> |
---|
1228 | </DD> |
---|
1229 | </DL> |
---|
1230 | <HR> |
---|
1231 | |
---|
1232 | <A NAME="main(java.lang.String[])"><!-- --></A><H3> |
---|
1233 | main</H3> |
---|
1234 | <PRE> |
---|
1235 | public static void <B>main</B>(<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>[] argv) |
---|
1236 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</A></PRE> |
---|
1237 | <DL> |
---|
1238 | <DD>Start the TaskTracker, point toward the indicated JobTracker |
---|
1239 | <P> |
---|
1240 | <DD><DL> |
---|
1241 | </DL> |
---|
1242 | </DD> |
---|
1243 | <DD><DL> |
---|
1244 | |
---|
1245 | <DT><B>Throws:</B> |
---|
1246 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</A></CODE></DL> |
---|
1247 | </DD> |
---|
1248 | </DL> |
---|
1249 | <HR> |
---|
1250 | |
---|
1251 | <A NAME="isTaskMemoryManagerEnabled()"><!-- --></A><H3> |
---|
1252 | isTaskMemoryManagerEnabled</H3> |
---|
1253 | <PRE> |
---|
1254 | public boolean <B>isTaskMemoryManagerEnabled</B>()</PRE> |
---|
1255 | <DL> |
---|
1256 | <DD>Is the TaskMemoryManager Enabled on this system? |
---|
1257 | <P> |
---|
1258 | <DD><DL> |
---|
1259 | </DL> |
---|
1260 | </DD> |
---|
1261 | <DD><DL> |
---|
1262 | |
---|
1263 | <DT><B>Returns:</B><DD>true if enabled, false otherwise.</DL> |
---|
1264 | </DD> |
---|
1265 | </DL> |
---|
1266 | <HR> |
---|
1267 | |
---|
1268 | <A NAME="getTaskMemoryManager()"><!-- --></A><H3> |
---|
1269 | getTaskMemoryManager</H3> |
---|
1270 | <PRE> |
---|
1271 | public org.apache.hadoop.mapred.TaskMemoryManagerThread <B>getTaskMemoryManager</B>()</PRE> |
---|
1272 | <DL> |
---|
1273 | <DD><DL> |
---|
1274 | </DL> |
---|
1275 | </DD> |
---|
1276 | <DD><DL> |
---|
1277 | </DL> |
---|
1278 | </DD> |
---|
1279 | </DL> |
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1280 | <!-- ========= END OF CLASS DATA ========= --> |
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1281 | <HR> |
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1282 | |
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1283 | |
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1284 | <!-- ======= START OF BOTTOM NAVBAR ====== --> |
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1286 | <A HREF="#skip-navbar_bottom" title="Skip navigation links"></A> |
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1296 | <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/TaskTracker.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> |
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1297 | <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> |
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1301 | </TR> |
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1309 | <TR> |
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1310 | <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> |
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1311 | <A HREF="../../../../org/apache/hadoop/mapred/TaskReport.html" title="class in org.apache.hadoop.mapred"><B>PREV CLASS</B></A> |
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1319 | document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>'); |
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1332 | SUMMARY: <A HREF="#nested_class_summary">NESTED</A> | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> |
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1334 | DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD> |
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1338 | <!-- ======== END OF BOTTOM NAVBAR ======= --> |
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1341 | Copyright © 2009 The Apache Software Foundation |
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