If Luigi has forked, we have a different PID, and need to reconnect.

def get_bite(self):
        """
        If Luigi has forked, we have a different PID, and need to reconnect.
        """
        config = hdfs_config.hdfs()
        if self.pid != os.getpid() or not self._bite:
            client_kwargs = dict(filter(
                lambda k_v: k_v[1] is not None and k_v[1] != '', six.iteritems({
                    'hadoop_version': config.client_version,
                    'effective_user': config.effective_user,
                })
            ))
            if config.snakebite_autoconfig:
                """
                This is fully backwards compatible with the vanilla Client and can be used for a non HA cluster as well.
                This client tries to read ``${HADOOP_PATH}/conf/hdfs-site.xml`` to get the address of the namenode.
                The behaviour is the same as Client.
                """
                from snakebite.client import AutoConfigClient
                self._bite = AutoConfigClient(**client_kwargs)
            else:
                from snakebite.client import Client
                self._bite = Client(config.namenode_host, config.namenode_port, **client_kwargs)
        return self._bite