kernel stack overflow

[Florin Lascau]

Hi,
One of our HP servers running HP-UX v11.11 rebooted by itself twice in the last month without no evident reason. All I could find was messages like "Kernel stack overflow" and "Data fault" and no additional details in /var/adm/syslog, in toobstones or /var/adm/crash.
Can anybody sugest me how to find and correct the reasons of this malfunctions?

Thanks
Florin

[A. Clay Stephenson]

It's not clear to me whether or not you have crash dumps. If you do, then you need to send them to HP for analysis or do it yourself with q4. If not then you need to make sure you system is properly configured to save the dumps.

lvlnboot -v /dev/vg00 and make sure a valid dump device is configured. If the dump device is also used as swap then you need to make certain that SAVECRASH=1 in /etc/rc.config.d/savecrash.

Problems of your nature are very difficult to pinpoint without using q4 to analyze the dump image.