title: vCenter Server Appliance 6.0 : 503 Service Unavailable
body: <p><code>503 Service Unavailable (Failed to connect to endpoint:</code> <code>[N7Vmacore4Http16LocalServiceSpecE:0x7fc8bad2f810] _serverNamespace = /vsphere-client _isRedirect = false _port = 9090)</code></p>
  
  <p>This is the error i'm constantly getting when trying to connect to the vCenter Server Web Client.</p>
  
  <h3>Details :</h3>
  
  <ul>
  <li>I'v installed the <strong>vCS Appliance 6.0</strong> on an <strong>ESXi 6.0</strong> host. It's running on top of it along other VMs.</li>
  <li>I can access the vCS appliance thourght an <strong>SSH</strong> client, but every attempt to access the web client ends with the error above.</li>
  <li>I'v found that causes for this error are: the server being overloaded or under maintenance. However, I'm the <strong>only one</strong> to have access to this platform.</li>
  </ul>
  
  <p>Any ideas ?</p>
  
  <h3>EDIT: Solved </h3>
  
  <p>I had a copy of the current vCenter appliance stored on the same ESXi. This created an IP conflict. I changed the IP address of the backup before its creation and the problem was solved</p>