App server shutdown

Hi,

I'm trying to find out the root cause of the unplanned application server shutdown that happened in our production system. I was browsing through the dev_w* and dev_disp files and found nothing unusual except for the log below, which I found in dev_disp.old file:

<b>Mon Oct 29 01:56:03 2007

DpSigInt: caught signal 2</b>

This was the last log when the app server shut itself down. Can anyone tell me what the above log means? And which other logs or trace files can I look for to help me find the root cause?

Thanks in advance.

Best regards,

Kris Caldoza