I can think of one instance. Memory. If WebLogic keep getting OutOfMemory exception for a while it can shutdown but not kill. You may have to analyze the log files to get more idea. Try running weblogic on verbose mode with GC enabled.
Joined: Apr 25, 2003
The log you are refering to is weblogic.log right?
Joined: May 24, 2003
No the server log file. You can find this log in %WL_DOMAIN%\<domain_name>.log and in addition you can also check %WL_DOMAIN%\<server_name>\<server_name>.log