title: How do I debug FIELD_DISCARDED_TYPE_CONVERSION_FAILED?
body: <p>My <code>pig</code> script produces this warning:</p>
  
  <blockquote>
    <p>WARN 
    org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
    - Encountered Warning FIELD_DISCARDED_TYPE_CONVERSION_FAILED 14 time(s).</p>
  </blockquote>
  
  <ol>
  <li>Is there a way to make it more informative? E.g., what is the alias/record/column which triggered it?</li>
  <li>How do I debug it? </li>
  </ol>