Shibboleth SP 3.1.0-3.1 with traffic peak crash on OL8.3

Tue Apr 20 16:34:14 UTC 2021

Hi all,
  i have a problem with an installation of Shibboleth SP 3.1.0-3.1 on 
Oracle Linux 8.3 (Kernel 5.4.17-2102.200.13.el8uek.x86_64). Once the SP 
starts with low traffic start it seems normal but when the traffic 
increase (1000/1500 request of peak) shibd process starts crashing; here 
it is the dmesg log:

[439842.066300] shibd[23763]: segfault at 0 ip 00007f7dd1320716 sp 
00007f7d377fcfa0 error 4 in libshibsp.so.9.0.0[7f7dd117a000+2c5000]

And this is the journalctl log:

Apr 20 13:40:45 myreverseproxy.local shibboleth[23515]: WARN 
Shibboleth.ServiceProvider [23515] shib_check_user [mysite.it]: error 
during ses>
Apr 20 13:40:45 rpprodclfek1vm.ad.lepida.it shibboleth[23515]: ERROR 
Shibboleth.Apache [23515] shib_check_user: Cannot connect to shibd 
process, a site adminis>

Is there any other information that can help us to debug this issue?
Thank you, greetings.

Stefano Zaniboni