```(async() => {
    if (cluster.isMaster) {
        console.log(`Master ${process.pid} is running`);
        const queue = fileUuids.splice(0, numCPUs);
        for (let i = 0; i < queue.length; i++) {
            console.log(`Fork process with uuid: ${queue[i]}`);
            cluster.fork({file_uuid: queue[i]});
        }
        cluster.on('exit', (worker, code) => {
            console.log(`=== Worker ${worker.process.pid} has finished task with code ${code}`);
            if (fileUuids.length) {
                const uuid = fileUuids.splice(0, 1);
                cluster.fork({file_uuid: uuid});
            }
        });
    } else {
        (async() => {
            try {
                await parseXlsx(process.env.file_uuid);
            } catch (e) {
                console.error(e);
            } finally {
                process.exit(0);
            }
        })();
    }
})();```