title: mongodump 3.2.1 positional arguments not allowed
body: <p>trying mongodump with following options and get "positional arguments not allowed"</p>
  
  <pre><code>mongodump --host=hostname --port=27017 --db=db --out=/path --oplog --gzip
  </code></pre>
  
  <p>tried <code>mongodump -h hostname -d dbname</code> and that works</p>
  
  <p>What does the message </p>
  
  <blockquote>
    <p>positional arguments not allowed</p>
  </blockquote>
  
  <p>mean?</p>