I'm running 1.6.6 on Linux Redhat ES 3.0 logging Cisco router logs to local files and it's been running just fine for over a week.
I just enabled  forwarding for local4 and local7 (with spoof UDP)  to 2 additional hosts via UDP and noticed, within a day, that it syslog-NG has consumed all available memory.   It continues to log, however, the system starts killing processes off unless I restart syslog-ng.

I checked the list, it seems like the closest similar problem I could find was back in 2000.   Any advice for fixing/identifying the problem?