I got this error when I tried to initiate odoo8 server through this command

 /opt/odoo/openerp-server

ERROR None openerp.http: Exception during JSON request handling.

Traceback (most recent call last):

File "/opt/odoo/openerp/http.py", line 537, in _handle_exception

return super(JsonRequest, self)._handle_exception(exception)

File "/opt/odoo/openerp/http.py", line 1415, in _dispatch_nodb

func, arguments = self.nodb_routing_map.bind_to_environ(request.httprequest.environ).match()

File "/usr/lib/python2.7/dist-packages/werkzeug/routing.py", line 1430, in match

raise NotFound()

NotFound: 404: Not Found