ODOO TimeOut

ODOO.log

2018-06-01 20:14:07,399 1 INFO ? odoo.sql_db: Connection to the database failed,
2018-06-01 20:14:07,401 1 INFO ? werkzeug: 10.0.2.13 - - [01/Jun/2018 20:14:07] "GET / HTTP/1.1" 500 -,
2018-06-01 20:14:07,405 1 ERROR ? werkzeug: Error on request:,
Traceback (most recent call last):,
  File "/usr/lib/python3/dist-packages/werkzeug/serving.py", line 205, in run_wsgi,
    execute(self.server.app),
  File "/usr/lib/python3/dist-packages/werkzeug/serving.py", line 193, in execute,
    application_iter = app(environ, start_response),
  File "/usr/lib/python3/dist-packages/odoo/service/server.py", line 252, in app,
    return self.app(e, s),
  File "/usr/lib/python3/dist-packages/odoo/service/wsgi_server.py", line 166, in application,
    return application_unproxied(environ, start_response),
  File "/usr/lib/python3/dist-packages/odoo/service/wsgi_server.py", line 154, in application_unproxied,
    result = handler(environ, start_response),
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1298, in __call__,
    return self.dispatch(environ, start_response),
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1272, in __call__,
    return self.app(environ, start_wrapped),
  File "/usr/lib/python3/dist-packages/werkzeug/wsgi.py", line 599, in __call__,
    return self.app(environ, start_response),
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1427, in dispatch,
    self.setup_db(httprequest),
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1359, in setup_db,
    httprequest.session.db = db_monodb(httprequest),
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1510, in db_monodb,
    dbs = db_list(True, httprequest),
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1478, in db_list,
    dbs = odoo.service.db.list_dbs(force),
  File "/usr/lib/python3/dist-packages/odoo/service/db.py", line 366, in list_dbs,
    with closing(db.cursor()) as cr:,
  File "/usr/lib/python3/dist-packages/odoo/sql_db.py", line 634, in cursor,
    return Cursor(self.__pool, self.dbname, self.dsn, serialized=serialized),
  File "/usr/lib/python3/dist-packages/odoo/sql_db.py", line 178, in __init__,
    self._cnx = pool.borrow(dsn),
  File "/usr/lib/python3/dist-packages/odoo/sql_db.py", line 517, in _locked,
    return fun(self, *args, **kwargs),
  File "/usr/lib/python3/dist-packages/odoo/sql_db.py", line 585, in borrow,
    **connection_info),
  File "/usr/lib/python3/dist-packages/psycopg2/__init__.py", line 164, in connect,
    conn = _connect(dsn, connection_factory=connection_factory, async=async),
psycopg2.OperationalError: FATAL:  remaining connection slots are reserved for non-replication superuser connections,