# Issue Summary

* After executing Nginx soft reload with "service nginx reload", nginx is able to close a lot of connections gracefully, but some connections aren't closed gracefully and Nginx is sending an RST packet. For these connections, Nginx didn't send FIN packet, and it didn't send "Connection: Close" header. The connections are HTTP/1.1 keep alive connections.

# Expected Behaviour

* After executing Nginx soft reload, Nginx is gracefully closing all connections by sending a "Connection: close" header in the response or a FIN packet.

# Supporting Data

I have tcpdump of 5 such connections where nginx didn't close the connection gracefully after nginx reload.
Here's the tcpdump - https://drive.google.com/file/d/1UquhmJET9i8ShEizu8453iUKpprutILV/view?usp=sharing

If we analyse one such connection, we see that nginx didn't send FIN packet on this connection, refer this image - https://i.imgur.com/zqyLOLc.png

If we see the response of second last request, we see nginx didn't send "Connection: close" header either, refer this image - https://i.imgur.com/P2uu722.png

In this image I have plotted FIN packets sent by nginx over time - https://i.imgur.com/5lNAmnk.png

Nginx was reloaded on 2022-01-12 13:57:44 UTC.

FIN packet graph (https://i.imgur.com/5lNAmnk.png) shows that Nginx was able to close a lot of connections gracefully at the time of reload, but it wasn't able to close the 5 connections. TCP dump of which I've shared above (https://drive.google.com/file/d/1UquhmJET9i8ShEizu8453iUKpprutILV/view?usp=sharing).