while I am starting the odoo9.0 server getting this error:

2017-09-15 07:44:57,040 3625 ERROR ? openerp.http: Exception during JSON request handling.
Traceback (most recent call last):
  File "/home/naveen/Desktop/odoo-9.0/openerp/http.py", line 648, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/home/naveen/Desktop/odoo-9.0/openerp/http.py", line 1638, in _dispatch_nodb
    func, arguments = self.nodb_routing_map.bind_to_environ(request.httprequest.environ).match()
  File "/home/naveen/python_odoo/local/lib/python2.7/site-packages/werkzeug/routing.py", line 1430, in match
    raise NotFound()
NotFound: 404: Not Found 2017-09-15 07:44:57,065 3625 INFO ? werkzeug: 192.168.0.125 - - [15/Sep/2017 07:44:57] "POST /longpolling/poll HTTP/1.1" 200 - 2017-09-15 07:45:13,086 3625 ERROR ? openerp.http: Exception during JSON request handling.
Traceback (most recent call last):
  File "/home/naveen/Desktop/odoo-9.0/openerp/http.py", line 648, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/home/naveen/Desktop/odoo-9.0/openerp/http.py", line 1638, in _dispatch_nodb
    func, arguments = self.nodb_routing_map.bind_to_environ(request.httprequest.environ).match()
  File "/home/naveen/python_odoo/local/lib/python2.7/site-packages/werkzeug/routing.py", line 1430, in match
    raise NotFound()

how can I solve this