I just simply use the tornado application together with threading as the following code:
我只是将tornado应用程序与线程一起使用,如下面的代码:
def MakeApp():
return tornado.web.Application([(r"/websocket", EchoWebSocket), ])
def run_tornado_websocket():
app = MakeApp()
http_server = tornado.httpserver.HTTPServer(app, ssl_options={
"certfile": os.path.join(os.path.abspath("."), "server.crt"),
"keyfile": os.path.join(os.path.abspath("."), "server_no_passwd.key"),
})
http_server.listen(options.port)
tornado.ioloop.IOLoop.current().start()
if __name__ == '__main__':
threads = []
t = threading.Thread(target=run_tornado_websocket, args=())
threads.append(t)
for t in threads:
t.start()
It works fine on python3.5.But it fails on python3.6 and the lasted tornado.It gets the error:
它在python3.5上工作正常。但它在python3.6和持续龙卷风上失败。它得到错误:
Exception in thread Thread-1:
Traceback (most recent call last):
File "D:\python3\lib\threading.py", line 916, in _bootstrap_inner
self.run()
File "D:\python3\lib\threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "D:\ssl\ws_server.py", line 49, in run_tornado_websocket
http_server.listen(options.port)
File "D:\python3\lib\site-packages\tornado\tcpserver.py", line 145, in listen
self.add_sockets(sockets)
File "D:\python3\lib\site-packages\tornado\tcpserver.py", line 159, in add_sockets
sock, self._handle_connection)
File "D:\python3\lib\site-packages\tornado\netutil.py", line 219, in add_accept_handler
io_loop = IOLoop.current()
File "D:\python3\lib\site-packages\tornado\ioloop.py", line 282, in current
loop = asyncio.get_event_loop()
File "D:\python3\lib\asyncio\events.py", line 694, in get_event_loop
return get_event_loop_policy().get_event_loop()
File "D:\python3\lib\asyncio\events.py", line 602, in get_event_loop
% threading.current_thread().name)
RuntimeError: There is no current event loop in thread 'Thread-1'.
I think there are some changes in IOLOOP in python3.6.But I don't know how to fix this and really want to know the reason.
我认为python3.6中的IOLOOP有一些变化。但我不知道如何修复这个并且真的想知道原因。
1 个解决方案
#1
0
Starting in Tornado 5.0, the asyncio event loop is used by default. asyncio has some extra restrictions because starting event loops on threads other than the main thread is an uncommon pattern and is often a mistake. You must tell asyncio that you want to use an event loop in your new thread with asyncio.set_event_loop(asyncio.new_event_loop()), or use asyncio.set_event_loop_policy(tornado.platform.asyncio.AnyThreadEventLoopPolicy()) to disable this restriction.
从Tornado 5.0开始,默认使用asyncio事件循环。 asyncio有一些额外的限制,因为在主线程以外的线程上启动事件循环是一种不常见的模式,而且往往是一个错误。您必须告诉asyncio要在新线程中使用asyncio.set_event_loop(asyncio.new_event_loop()),或使用asyncio.set_event_loop_policy(tornado.platform.asyncio.AnyThreadEventLoopPolicy())来禁用此限制。
#1
0
Starting in Tornado 5.0, the asyncio event loop is used by default. asyncio has some extra restrictions because starting event loops on threads other than the main thread is an uncommon pattern and is often a mistake. You must tell asyncio that you want to use an event loop in your new thread with asyncio.set_event_loop(asyncio.new_event_loop()), or use asyncio.set_event_loop_policy(tornado.platform.asyncio.AnyThreadEventLoopPolicy()) to disable this restriction.
从Tornado 5.0开始,默认使用asyncio事件循环。 asyncio有一些额外的限制,因为在主线程以外的线程上启动事件循环是一种不常见的模式,而且往往是一个错误。您必须告诉asyncio要在新线程中使用asyncio.set_event_loop(asyncio.new_event_loop()),或使用asyncio.set_event_loop_policy(tornado.platform.asyncio.AnyThreadEventLoopPolicy())来禁用此限制。