Question

我需要做一些阻塞性的CPU工作，因此我启动了一个新的aioprocessing AioProcess并使用aioprocessing AioPipe与之通信。

启动过程如下：

async def launch_worker(app):
    pipe_a, pipe_b = AioPipe()
    process = AioProcess(target=worker, args=(pipe_b,))
    process.start()
    app.process, app.pipe = process, pipe_a
    await sleep(0)

启动时启动工作程序时，一切正常。但是，如果我从某个角度启动该工作人员，则最终会出现一种奇怪的行为。具体来说，当我尝试使用ctrl-c KeyboardInterrupt关闭服务器时，服务器挂起了–它停止处理新请求，但直到我执行操作系统终止操作后才终止。

这是完整的脚本：

from aiohttp import web
import logging
from logging.config import dictConfig
from aioprocessing import AioPipe, AioProcess
from asyncio import shield, sleep, get_event_loop

import uuid
import time


async def the_view(request):
    msg = str(uuid.uuid4())[0:8]
    if request.app.process is None:
        logging.info("Launching worker process in view.")
        await launch_worker(request.app)

    pipe = request.app.pipe
    logging.info("Webserver Sending {}".format(msg))
    pipe.send(msg)
    output = await shield(pipe.coro_recv())
    logging.info("Webserver received {}".format(output))
    return web.Response(text=output)


def worker(pipe):
    try:
        while True:
            foo = pipe.recv()
            if foo is None:
                break
            else:
                time.sleep(3)
                msg = str(uuid.uuid4())[0:8]
                logging.info("Worker returning {} {}".format(foo, msg))
                pipe.send("{} {}".format(foo, msg))
    except KeyboardInterrupt:
        pipe.send("Worker killed, argggghhhh")


async def launch_worker_at_start(app):
    logging.info("Launching worker at start")
    return await launch_worker(app)


async def launch_worker(app):
    pipe_a, pipe_b = AioPipe()
    process = AioProcess(target=worker, args=(pipe_b,))
    process.start()
    app.process, app.pipe = process, pipe_a
    await sleep(0)


def build_app(loop):
    app = web.Application(debug=True)
    app.process, app.pipe = None, None
    app.router.add_get('/', the_view)

    ## uncomment the following line and everything works ##
    # loop.create_task(launch_worker_at_start(app))  
    #######################################################

    return app


if __name__ == '__main__':
    logging.info("Webserver starting")
    loop = get_event_loop()
    this_app = build_app(loop)

    web.run_app(this_app, port=8081, loop=loop)

我正在使用aiohttp == 2.3.10和aioprocessing == 0.0.1

编辑：

与aiohttp == 3.4.4和aioprocessing == 1.0.1和python 3.5.6相同的行为。

aiohttp –从视图启动时启动aioprocessing时的行为不同

0 个答案: