uvloop blocks app and not executes aiohttp server #425

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1. 1st1 commented on Jul 21, 2021

   

   1st1

   on Jul 21, 2021

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   Sounds like the 17000 port is used by something else on that particular server. And most likely aiohttp has some timeout/retry logic in place and waits for it to become available. I don't think this is a uvloop bug. That said, check what happens if you don't activate uvloop -- does vanilla asyncio behave differently?
2. semakmillev commented on Jul 21, 2021

   

   semakmillev

   on Jul 21, 2021

   Last edited by semakmillev

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   Sounds like the 17000 port is used by something else on that particular server. And most likely aiohttp has some timeout/retry logic in place and waits for it to become available. I don't think this is a uvloop bug. That said, check what happens if you don't activate uvloop -- does vanilla asyncio behave differently?

   1. As i mentioned - i used different ports - like 8023, 7091, 17091, 17000, 80 and several another with same result
   2. Yes, if i run just
      from aiohttp import web
      app = web.Application()
      web.run_app(app, port=17000)
      everything works fine.

   It's really strange. Seems that i have some hardware or system problem, because on other machine with same software i don't get this bug. But how to find out it - i dont know(
3. roman27t commented on Sep 24, 2021

   

   roman27t

   on Sep 24, 2021

   Last edited by roman27t

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   Hello.

   I have the same issue after upgrade libs:

   works fine:
   python 3.6
   aiohttp 3.6.2
   uvloop 0.14.0

   issue:
   python 3.7, 3.9
   aiohttp 3.7.4.post0
   uvloop 0.16.0

   If I have only one pod - it was ok, but when I start 2nd pod - pod doesn't listen 8080 port

   My system:
   sh-4.2# cat /etc/*release : CentOS Linux release 7.8.2003 (Core)

   If I run without uvloop.install() - it was ok.

   When I set Debug mode: PYTHONASYNCIODEBUG=1
   I finally got a log:

   WARNING:asyncio:create_server() failed to create socket.socket(10, 1, 6)
   Traceback (most recent call last):
   File "uvloop/loop.pyx", line 1745, in uvloop.loop.Loop.create_server
   File "/usr/local/lib/python3.9/socket.py", line 232, in init
   _socket.socket.init(self, family, type, proto, fileno)
   OSError: [Errno 97] Address family not supported by protocol
4. nehanagendra02 commented on Oct 8, 2021

   

   nehanagendra02

   on Oct 8, 2021

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   @bumer-t , @semakmillev were you able to figure out the root cause or solution to this problem? I am facing similar issues.
5. kfur commented on Oct 11, 2021

   

   kfur

   on Oct 11, 2021

   Last edited by kfur

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   Try set ipv4 address, because by default it will try to bind to ipv6 first
6. fantix

   closed this as completedin #446on Aug 13, 2022