Indeed, the 1024 is too low, if you have set the Max Connection to 3072 and if this is a Production Server with load. From documentation, we mentioned that value but only to illustrate how the command to set it work.
Modify the Default Limit Parameters https://docops.ca.com/ca-single-sign-on/12-52-sp1/en/installing/install-a-policy-server/install-policy-server-on-unix/prepare-for-the-policy-server-installation
Release: MSPSSO99000-12.8-Single Sign-On-for Business Users-MSP Component:
Set the value of ulimit -n to a value much higher than 1024 to fix this issue