Can’t be sure this applies to you, but I had a similar issue at a site several years ago. The symptoms were random engine crashes in the wee hours of the night – usually around 3AM – but not every night.
As the engine is running, it would encounter an error trying to access one of the system files (usually the db files) and would go into panic mode and shut everything down.
Eventually discovered the issue to be a file locking problem where a backup system was coming to our Cloverleaf server and backing up all the files – locking them while perform the file read.
Once the backup system changed to not exclusively access the files, the problem was solved.
Hope this helps.
Sven Williams
