gunicorn后台中，请求中执行的协程任务asyncio.create_task失败，日志中发现 “WORKER TIMEOUT” ，是gunicorn配置的超时时间太短，适当改长

workers = 2
worker_class = "uvicorn.workers.UvicornWorker"
loglevel = "info"
timeout = 30000
preload_app = True