title: Docker error: too many open files
body: <p>I got that error message when creating container.</p>
  
  <pre><code>Error response from daemon: too many open files
  </code></pre>
  
  <p>But  I couldn't find any information about that error.
  (I saw <a href="https://github.com/docker/libcontainer/issues/211" rel="noreferrer">https://github.com/docker/libcontainer/issues/211</a>, but that was not the same problem of it.)
  Is there anyone who knows about it?</p>
  
  <p>Thanks.</p>