This forum is only for reproducible bugs with csf and lfd (i.e. not iptables problems, lack of understanding how to use a feature, etc). Posts must be accompanied with full technical details of the problem and how it can be recreated. Any posts not adhering to this, or not considered bugs, will be moved to the General Discussion (csf) forum.
ip_conntrack version 2.1 (8127 buckets, 65016 max) - 304 bytes per conntrack
application bug: lfd(4124) has SIGCHLD set to SIG_IGN but calls wait().
(see the NOTES section of 'man 2 wait'). Workaround activated.
application bug: lfd(4709) has SIGCHLD set to SIG_IGN but calls wait().
(see the NOTES section of 'man 2 wait'). Workaround activated.
...and a few more lines like that.
Noticed the error after a server lock-up that occurred about half an hour after upgrading to the latest version (4.36) of csf+lfd, but not sure they are related. The server is up and running now.
That's an old kernel bug. You should ensure you're running the latest RHEv3 kernel. You can either ignore the messages or enable OLD_REAPER in csf.conf and then restart lfd.