Method on_exception

cassandra/pool.py:322–337

Called when an Exception is raised when trying to connect. `exc` is the Exception that was raised and `next_delay` is the number of seconds (as a float) that the handler will wait before attempting to connect again. Subclasses should return :const:`False` if

(self, exc, next_delay)

        pass

    def on_exception(self, exc, next_delay):
        """
        Called when an Exception is raised when trying to connect.
        `exc` is the Exception that was raised and `next_delay` is the
        number of seconds (as a float) that the handler will wait before
        attempting to connect again.

        Subclasses should return :const:`False` if no more attempts to
        connection should be made, :const:`True` otherwise.  The default
        behavior is to always retry unless the error is an
        :exc:`.AuthenticationFailed` instance.
        """
        if isinstance(exc, AuthenticationFailed):
            return False
        else:
            return True


class _HostReconnectionHandler(_ReconnectionHandler):