title: Concat Avro files using avro-tools
body: <p>Im trying to merge avro files into one big file, the problem is <code>concat</code> command does not accept the wildcard</p>
  
  <pre><code>hadoop jar avro-tools.jar concat /input/part* /output/bigfile.avro
  </code></pre>
  
  <p>I get:</p>
  
  <blockquote>
    <p>Exception in thread "main" java.io.FileNotFoundException: File does
    not exist: /input/part*</p>
  </blockquote>
  
  <p>I tried to use <code>""</code> and <code>''</code> but no chance. </p>