title: Bus.bus Unavailable after workers greater then 0
body: <p>This is my odoo-server.conf</p>
  <pre><code>admin_passwd = &lt;pwd&gt;
  xmlrpc_port = 8069
  logfile = /var/log/odoo/odoo-server.log
  addons_path=&lt;path&gt;
  dbfilter = &lt;dbname&gt;
  limit_memory_soft = 2629145600
  limit_memory_hard = 4677721600
  limit_request = 8192
  limit_time_cpu = 600
  limit_time_real = 1200
  max_cron_threads = 1
  workers = 8
  </code></pre>
  <p>I have already follow the step for enabled workers.(Except SSL)</p>