Vantage 809B: Log File 76GB overnight

Last night the Vantage server had 76.9GB free space.

This morning few users could print from Vantage and the MRP that had
been started last night around 5pm appeared to be hung. I cancelled
the MRP job, but print jobs still couldn't sucessfully print. I checked
the server and the server only had 51.3MB of free space. The
server.log file had grown to 76GB overnight. Even with all users out
of the system, the log file continued to grow. I stopped the app
servers and database and deleted the log file. I was advised by
support not to run MRP again.

Has anyone else experienced this? If so, what was the cause?

Thanks in advance,