I had the notice "You must reboot the server to apply software updates." on WHM and clicked on it. The result was as seen below. I do not have kernelcare installed. I had it tested once and it was removed (or so I thought, perhaps some remnants?).
A fatal error or timeout occurred while processing this directive. [close]
(XID yr6nzf) The system failed to send an <abbr title="Hypertext Transfer Protocol">HTTP</abbr> “GET” request to “https://patches.kernelcare.com/119310f02dd25696f18e1a5858fc040302067554/version” because of an error: Could not connect to 'patches.kernelcare.com:443': Connection timed out at /usr/local/cpanel/Cpanel/KernelCare/Availability.pm line 66.
Cpanel::KernelCare::Availability::kernel_is_supported() called at /usr/local/cpanel/Cpanel/KernelCare.pm line 36
Cpanel::KernelCare::system_supports_kernelcare() called at whostmgr/bin/whostmgr.pl line 5376
main::graceful_reboot_landing("graceful_reboot_landing") called at /usr/local/cpanel/Whostmgr/Dispatch.pm line 274
Whostmgr::Dispatch::_do_call("graceful_reboot_landing", HASH(0x3229478), HASH(0x3228c08)) called at /usr/local/cpanel/Whostmgr/Dispatch.pm line 172
Whostmgr::Dispatch::dispatch("graceful_reboot_landing", 1, ARRAY(0x3229340), HASH(0x3228c08)) called at whostmgr/bin/whostmgr.pl line 439
A fatal error or timeout occurred while processing this directive. [close]
(XID yr6nzf) The system failed to send an <abbr title="Hypertext Transfer Protocol">HTTP</abbr> “GET” request to “https://patches.kernelcare.com/119310f02dd25696f18e1a5858fc040302067554/version” because of an error: Could not connect to 'patches.kernelcare.com:443': Connection timed out at /usr/local/cpanel/Cpanel/KernelCare/Availability.pm line 66.
Cpanel::KernelCare::Availability::kernel_is_supported() called at /usr/local/cpanel/Cpanel/KernelCare.pm line 36
Cpanel::KernelCare::system_supports_kernelcare() called at whostmgr/bin/whostmgr.pl line 5376
main::graceful_reboot_landing("graceful_reboot_landing") called at /usr/local/cpanel/Whostmgr/Dispatch.pm line 274
Whostmgr::Dispatch::_do_call("graceful_reboot_landing", HASH(0x3229478), HASH(0x3228c08)) called at /usr/local/cpanel/Whostmgr/Dispatch.pm line 172
Whostmgr::Dispatch::dispatch("graceful_reboot_landing", 1, ARRAY(0x3229340), HASH(0x3228c08)) called at whostmgr/bin/whostmgr.pl line 439