SOLVED [CPANEL-26179] Starting Spamd errors out with The system failed to execute the system call setrlimit

/etc/redhat-release:CentOS release 6.10 (Final)
/usr/local/cpanel/version:11.78.0.16
/var/cpanel/envtype:virtuozzo
CPANEL=release

I recently upgraded MySql from 5.5 to 5.6. I had some issues with roundcube displaying emails in the inbox. Restarting exim seemed to take care of things, but now I get this strange message when it tries to start spamassassin.

I thought that maybe reinstalling spamassassin would solve the problem, but it hasn't.

I saw the following thread on the forums and checked the file, but mine doesn't have any uncommented lines in it:

SOLVED - [CPANEL-23931] The system failed to execute the system call setrlimit error

Full error code below.

Code:

Starting spamd: Cpanel::Exception::SystemCall/(XID ujgc4c) The system failed to execute the system call “setrlimit” (15 ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒) because of an error: Invalid argument
 at /usr/local/cpanel/Cpanel/Syscall.pm line 116.
        Cpanel::Syscall::syscall("setrlimit", 15, "\x{ff}\x{ff}\x{ff}\x{ff}\x{ff}\x{ff}\x{ff}\x{ff}\x{ff}\x{ff}\x{ff}\x{ff}\x{ff}\x{ff}\x{ff}\x{ff}") called at /usr/local/cpanel/Cpanel/Sys/Rlimit.pm line 126
        Cpanel::Sys::Rlimit::setrlimit("RTTIME", 18446744073709551615, 18446744073709551615) called at /usr/local/cpanel/Cpanel/ServiceManager/Base.pm line 788
        eval {...} called at /usr/local/cpanel/Cpanel/ServiceManager/Base.pm line 788
        eval {...} called at /usr/local/cpanel/Cpanel/ServiceManager/Base.pm line 773
        Cpanel::ServiceManager::Base::setrlimits(Cpanel::ServiceManager::Services::Spamd=HASH(0x162d8120)) called at /usr/local/cpanel/Cpanel/ServiceManager/Base.pm line 825
        Cpanel::ServiceManager::Base::start(Cpanel::ServiceManager::Services::Spamd=HASH(0x162d8120)) called at /usr/local/cpanel/Cpanel/ServiceManager/Services/Spamd.pm line 221
        Cpanel::ServiceManager::Services::Spamd::start(Cpanel::ServiceManager::Services::Spamd=HASH(0x162d8120)) called at /usr/local/cpanel/Cpanel/ServiceManager/Base.pm line 725
        Cpanel::ServiceManager::Base::restart(Cpanel::ServiceManager::Services::Spamd=HASH(0x162d8120), "graceful", undef) called at /usr/local/cpanel/Cpanel/ServiceManager/Base.pm line 541
        Cpanel::ServiceManager::Base::run_from_argv(Cpanel::ServiceManager::Services::Spamd=HASH(0x162d8120), "--verbose", "--no-verbose") called at bin/restartsrv_base.pl line 120
        scripts::restartsrv_base::__ANON__() called at /usr/local/cpanel/3rdparty/perl/528/lib/perl5/cpanel_lib/Try/Tiny.pm line 97
        eval {...} called at /usr/local/cpanel/3rdparty/perl/528/lib/perl5/cpanel_lib/Try/Tiny.pm line 88
        Try::Tiny::try(CODE(0x162c70c0), Try::Tiny::Catch=REF(0xc0d9c8)) called at bin/restartsrv_base.pl line 160
        scripts::restartsrv_base::run("--no-verbose") called at bin/restartsrv_base.pl line 57
ionice: ioprio_set failed: Operation not permitted
warn [restartsrv_spamd] The 'spamd' service's PID file '/var/run/spamd.pid' did not appear after 10 seconds.

info [restartsrv_spamd] The service 'spamd' failed to restart. Trying '/usr/local/cpanel/3rdparty/perl/528/bin/spamd'.
warn [restartsrv_spamd] The 'spamd' service's PID file '/var/run/spamd.pid' did not appear after 10 seconds.

(XID egkwpe) The “spamd” service failed to start.