title: hadoop fs -text file returns "text: Unable to write to output stream."
body: <p>I have some files on the HDFS, and I try to use command</p>
  
  <pre><code>hadoop fs -text filename | head -10
  </code></pre>
  
  <p>after exec the command, it always returns the first 10 lines to the terminal, and it's what I want, but it always returns a line "text: Unable to write to output stream." attached to it, I feel very confused about what the attached line means.</p>