In hadoop - Map-Reduce error with filesplit -

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When I use the bottom row in the map class: 

  string filename = ( (FileScript) Context.getInputSplit ()). GetPath () GetName (); Println (file name);

I got an empty output file. In addition, the console has the last two lines: 

  14/05/06 12:52:53 INFO mapred .JobClient: map output record = 0 14/05/06 12:52:53 information mapred.JobClient: SPLIT_RAW_BYTES = 2127

The problem is with the system .out.println () , you will not get the result in the console. You must check your logs

or very simple: use a logger!

  1. Required import class for logging 

      import org.apache.commons logging.Log; Import org.apache.commons.logging.LogFactory;

  2. Define logger 

      Private Static Last Log LOG = LogFactory.getLog (MyClass.class);

  3. Log in to whatever you need 

      LOG.info (fileName);

You will get results during the job execution in the console.


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