/// <summary>
/// Get the
/// <see cref="Org.Apache.Hadoop.FS.Path"/>
/// to the task's temporary output directory
/// for the map-reduce job
/// <b id="SideEffectFiles">Tasks' Side-Effect Files</b>
/// <p>Some applications need to create/write-to side-files, which differ from
/// the actual job-outputs.
/// <p>In such cases there could be issues with 2 instances of the same TIP
/// (running simultaneously e.g. speculative tasks) trying to open/write-to the
/// same file (path) on HDFS. Hence the application-writer will have to pick
/// unique names per task-attempt (e.g. using the attemptid, say
/// <tt>attempt_200709221812_0001_m_000000_0</tt>), not just per TIP.</p>
/// <p>To get around this the Map-Reduce framework helps the application-writer
/// out by maintaining a special
/// <tt>${mapreduce.output.fileoutputformat.outputdir}/_temporary/_${taskid}</tt>
/// sub-directory for each task-attempt on HDFS where the output of the
/// task-attempt goes. On successful completion of the task-attempt the files
/// in the <tt>${mapreduce.output.fileoutputformat.outputdir}/_temporary/_${taskid}</tt> (only)
/// are <i>promoted</i> to <tt>${mapreduce.output.fileoutputformat.outputdir}</tt>. Of course, the
/// framework discards the sub-directory of unsuccessful task-attempts. This
/// is completely transparent to the application.</p>
/// <p>The application-writer can take advantage of this by creating any
/// side-files required in a work directory during execution
/// of his task i.e. via
/// <see cref="FileOutputFormat{K, V}.GetWorkOutputPath(Org.Apache.Hadoop.Mapreduce.TaskInputOutputContext{KEYIN, VALUEIN, KEYOUT, VALUEOUT})
/// "/>
/// , and
/// the framework will move them out similarly - thus she doesn't have to pick
/// unique paths per task-attempt.</p>
/// <p>The entire discussion holds true for maps of jobs with
/// reducer=NONE (i.e. 0 reduces) since output of the map, in that case,
/// goes directly to HDFS.</p>
/// </summary>
/// <returns>
/// the
/// <see cref="Org.Apache.Hadoop.FS.Path"/>
/// to the task's temporary output directory
/// for the map-reduce job.
/// </returns>
/// <exception cref="System.IO.IOException"/>
/// <exception cref="System.Exception"/>
public static Path GetWorkOutputPath <_T0>(TaskInputOutputContext <_T0> context)
{
FileOutputCommitter committer = (FileOutputCommitter)context.GetOutputCommitter();
return(committer.GetWorkPath());
}
public virtual OutputCommitter GetOutputCommitter()
{
return(@base.GetOutputCommitter());
}
