Django芹菜一次只能运行两个任务?

I have a celery task like this:

我有一个芹菜任务:

@celery.task
def file_transfer(password, source12, destination):
    result = subprocess.Popen(['sshpass', '-p', password, 'rsync', '-avz', source12, destination], 
                                    stderr=subprocess.PIPE, stdout=subprocess.PIPE).communicate()[0]                             
    return result        
@