title: Error "Failed to retrieve data from /webhdfs/v1/?op=LISTSTATUS: Server Error" when using hadoop
body: <p>I opened up localhost:9870 and try to upload a txt file to the hdfs.</p>
  
  <p>I see the error message below</p>
  
  <pre><code>Failed to retrieve data from /webhdfs/v1/?op=LISTSTATUS: Server Error
  </code></pre>