[syslog-ng] Syslog-ng too many open files

Hello, I'm receiving many messages on my syslog-ng like this: syslog-ng[20419]: Error opening file for writing; filename="...", error='Too many open files (24)' syslog-ng[20419]: Error accepting new connection; error='Too many open files (24)' In lsof output, the syslog-ng daemon has many files opened and when I try to login from other console or change to root account, it gets blocked. I've increased the sysctl fs.file-max to 300000 but the problem persists. Any ideas what's going wrong?