Nginx hang and do not respond with large number of network connection in FIN_WAIT state

[gnusys]

Set multi_accept off

And the web service did not hang this time

https://i.imgur.com/irbA5MO.png

But the connections in CLOSE_WAIT and LAST_ACK got a spike

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,282613,282675#msg-282675