ProFTPD Signal 15
I have been running the "Perfect Server Ubuntu 9.10 ISPconfig2". Mostly everything is working properly. However at odd times the FTP server (ProFTPD) randomly exits with the log error (Signal 15). I can easily restart it with the ISPconfig web utility, but I would like to know why it keeps exiting, and how to resolve the issue. I have been having this issue for a few months. I hope you can help me out!