Time for action – creating counters, task states, and writing log output

We'll modify our UFORecordValidationMapper to report statistics about skipped records and also highlight some other facilities for recording information about a job:

1. Create the following as the UFOCountingRecordValidationMapper.java file:

   import java.io.IOException;
   
   import org.apache.hadoop.io.* ;
   import org.apache.hadoop.mapred.* ;
   import org.apache.hadoop.mapred.lib.* ;
   
   public class UFOCountingRecordValidationMapper extends MapReduceBase
   implements Mapper<LongWritable, Text, LongWritable, Text>
   {
   
       public enum LineCounters
       {
           BAD_LINES,
           TOO_MANY_TABS,
           TOO_FEW_TABS
       } ;
   
       public void map(LongWritable key, Text value,
           OutputCollector<LongWritable, Text> output,
           Reporter reporter) throws IOException
       {
           String line = value.toString();
   
           if (validate(line, reporter))
   Output.collect(key, value);
       }
   
       private boolean validate(String str...