Handle accept in a loop and catch more errors on accept

    def _handle(self, watcher, revents):

        # Collect offline connections:

        self._collect_connection()

        while True:

            try:

                sock, address = self._sock.accept()

            except socket.error as err:

                if err.errno in self.NONBLOCKING_ERRORS:

                    return

                if err.errno in (errno.ECONNABORTED, errno.EPROTO, errno.EINTR):

                    pass

                else:

                    self.logger.warn('Error while accepting client: %s', err)

                    return