World Server Crash

Hellow this error appears in my error log and make my world server automatically crashed
2012/ 6/21 17:54:00 3600000

2012/ 6/21 17:55:08 3600000

how to fix that please?

Personally I never had this problem ;)
You have done something special?

This Error have nothing to do with the Worldcrash.
What have you done recently?

Check your Resources or your Server is crashed by a User when it is public.

Greetz