OperationalError when polling puts connection in a bad state about momoko HOT 3 CLOSED

    @property
    def db(self):
        if not self._db:
            # Setup the db connection when first accessed instead of at
            # initialization so that each child process gets its own
            # connection.
            self._db = Momoko({
                'host': 'localhost',
                'database': 'media_archive',
                'user': 'ma_db_user',
                'password': 'password',
                'min_conn': 5,
                'max_conn': 20,
                'cleanup_timeout': 5
            })
        return self._db

    @property
    def db(self):
        if not hasattr(self.application, 'db'):
            self.application.db = Momoko({
                'host': 'localhost',
                'database': 'media_archive',
                'user': 'ma_db_user',
                'password': 'password',
                'min_conn': 5,
                'max_conn': 20,
                'cleanup_timeout': 10
            })
        return self.application.db