my othire shutdown suddenly

[Onimusha]

after running about 20 hrs online, my server shutdown suddenly but the console dont send any erro message
someone know how to fix it?
none player is online and the server using only 40% cpu/ram

log:
:: Total loading time: 8.082s
:: Starting Server... [done]
:: Server Running...
Shutting down server...[done]

 

[Peonso]

Shutting down server...

That is actuall server shutdown function working, you probably has a server save script that shutdown the server, check global events.