I think you'll find that "kill -9" doesn't do anything either, and the only recourse is a system reboot. What this sounds like to me is that the kernel has gotten wedged trying to perform some operation or other on behalf of that process. Problems like a stuck disk I/O request are often found to result in unkillable, un-attachable processes. How up-to-date is your kernel? Seen any signs of hardware problems lately? regards, tom lane
The kernel is 2.6.15-1-686-smp, and we haven't seen any other problems on this machine till now.
I was hoping there was some other solution, but you are probably right... I'll investigate some more to see if I can find any other workarounds, but I'll probably just have to bite the bullet here pretty soon.
Jon