Tornaod啓用多進程
import time
from tornado.web import Application, RequestHandler
import tornado.ioloop
import tornado.httpserver
class MainHandler(RequestHandler):
def get(self):
now = time.time()
self.write("<html><body>this is test: {0}</body></html>".format(now))
def main():
setting = {
"autoreload": True,
"debug": True
}
app = Application([
(r"/", MainHandler)
], **setting)
server = tornado.httpserver.HTTPServer(app)
server.bind(7000)
server.start(2) // 啓用多進程
io_loop = tornado.ioloop.IOLoop.current()
io_loop.start()
if __name__ == "__main__":
main()報錯：
File "/usr/lib64/python3.6/selectors.py", line 412, in register
self._epoll.register(key.fd, epoll_events)
FileExistsError: [Errno 17] File exists
child 1 (pid 1249) exited with status 1, restarting
......
File "/usr/lib64/python3.6/selectors.py", line 191, in get_key
raise KeyError("{!r} is not registered".format(fileobj)) from None
KeyError: '6 is not registered'
原因：自動重載與多個進程不兼容。
多進程啓用時，需要將autoreload設爲False。