title: U-SQL Ignore Empty Files
body: <p>I receive a daily dump of files from a data provider. On occasion we  receive empty files (20bytes). Is there any way to automatically avoid processing or skip these files? </p>
  
  <p>I have tried:</p>
  
  <pre><code>USING Extractors.Csv(skipFirstNRows:1, silent:true);
  </code></pre>
  
  <p>But I seem to get a vertex failure related to what I believe is the empty files.</p>