SSL connection timeout and Apache restart issue

Hello,

We are frequently facing the apache restart issue on the server and getting following error logs:

```
[Mon Oct 04 13:19:06.191678 2021] [mpm_event:notice] [pid 24059:tid 140325036726144] AH00492: caught SIGWINCH, shutting down gracefully
[Mon Oct 04 13:19:09.552917 2021] [core:warn] [pid 24059:tid 140325036726144] AH00045: child process 24079 still did not exit, sending a SIGTERM
[Mon Oct 04 13:19:09.552964 2021] [core:warn] [pid 24059:tid 140325036726144] AH00045: child process 24080 still did not exit, sending a SIGTERM
[Mon Oct 04 13:19:09.552973 2021] [core:warn] [pid 24059:tid 140325036726144] AH00045: child process 24081 still did not exit, sending a SIGTERM
[Mon Oct 04 13:19:09.552982 2021] [core:warn] [pid 24059:tid 140325036726144] AH00045: child process 25085 still did not exit, sending a SIGTERM
[Mon Oct 04 13:19:09.552989 2021] [core:warn] [pid 24059:tid 140325036726144] AH00045: child process 8784 still did not exit, sending a SIGTERM

[Tue Oct 05 04:22:40.162558 2021] [mpm_event:notice] [pid 30989:tid 139889813510016] AH00492: caught SIGWINCH, shutting down gracefully
[Tue Oct 05 04:22:43.533512 2021] [core:warn] [pid 30989:tid 139889813510016] AH00045: child process 30990 still did not exit, sending a SIGTERM
[Tue Oct 05 04:22:43.533550 2021] [core:warn] [pid 30989:tid 139889813510016] AH00045: child process 30991 still did not exit, sending a SIGTERM
[Tue Oct 05 04:22:43.533559 2021] [core:warn] [pid 30989:tid 139889813510016] AH00045: child process 30992 still did not exit, sending a SIGTERM
[Tue Oct 05 04:22:43.533570 2021] [core:warn] [pid 30989:tid 139889813510016] AH00045: child process 31080 still did not exit, sending a SIGTERM
[Tue Oct 05 04:22:43.533581 2021] [core:warn] [pid 30989:tid 139889813510016] AH00045: child process 32328 still did not exit, sending a SIGTERM
[Tue Oct 05 04:22:43.533589 2021] [core:warn] [pid 30989:tid 139889813510016] AH00045: child process 3307 still did not exit, sending a SIGTERM
[Tue Oct 05 04:22:43.533597 2021] [core:warn] [pid 30989:tid 139889813510016] AH00045: child process 22254 still did not exit, sending a SIGTERM
[Tue Oct 05 04:22:43.533605 2021] [core:warn] [pid 30989:tid 139889813510016] AH00045: child process 26342 still did not exit, sending a SIGTERM
[Tue Oct 05 04:22:45.535668 2021] [core:warn] [pid 30989:tid 139889813510016] AH00045: child process 30990 still did not exit, sending a SIGTERM
[Tue Oct 05 04:24:24.392822 2021] [ssl:warn] [pid 21320:tid 139877076961152] AH01873: Init: Session Cache is not configured [hint: SSLSessionCache]
```

Pleaes advise on this.

Thank you.

1. These are just warnings.
2. Try to change MPM to Prefork

We are using the Apache Event Worker on our server, so it's safe to change the Worker from Event to Prefork.

```
[root@server apache]# /usr/local/apache/bin/apachectl -M | grep mpm
 mpm_event_module (static)
```