[sr-dev] [kamailio/kamailio] Frequently TCP/TLS sessions remain in CLOSE_WAIT (#1881)

[kvrban]

> I have see similar behavior on CentOS with default network initialization subsystem.
> After I reconfigured to use `systemd-networkd` instead default network initialization, then i not see more "CLOSE_WAIT".
> 
> Could you reconfigure network using `systemd-networkd` and then retest.

Hey sergey, i could try this too. But as far as I understand it. CLOSE_WAIT is a issue by the application, not finally closing the session. 

As described by [Crist Clark](http://unix.derkeiler.com/Mailing-Lists/SunManagers/2006-01/msg00367.html)

> CLOSE_WAIT means that the local end of the connection has received
> a FIN from the other end, but the OS is waiting for the program at the
> local end to actually close its connection.
> 
> The problem is your program running on the local machine is not closing
> the socket. It is not a TCP tuning issue. A connection can (and quite
> correctly) stay in CLOSE_WAIT forever while the program holds the
> connection open.

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