title: Error 502 (Bad Gateway) when accessing Jupyter Notebook from Google Deep Learning VM
body: <p>I have recently quoted a Deep Learning VM from Google Cloud. DLVM provides a link to the jupyter notebook of our VM, but when I paste the link to the browser, it gave us Error 502 (Bad Gateway).</p>
  
  <p>The VM consists of  100 GB of memory, 4 vCPU (26 GB Memory), and 2 Tesla T4 GPUS. I tried to stop and restart the instance several times but it did not work.</p>
  
  <p>The link to Jupyter Notebook is provided by this command given by the "Get started" page:</p>
  
  <pre><code>gcloud compute instances describe --project &lt;project-id&gt; --zone &lt;zone-id&gt; &lt;instance-id&gt; | grep googleusercontent.com | grep datalab
  </code></pre>
  
  <p>The command successfully gave me a link.</p>
  
  <p>However, when I paste the link to the browser, it gave me an error as followings:</p>
  
  <p>Error 502 (Bad Gateway)!!
  502. That’s an error. 
  That’s all we know.</p>