[Beowulf] Node Drop-Off

[Tim Moore]

Hello All -

I have a compute node that has started dropping off.  When I say drop 
off, I mean the node (while running a job) will lose all connectivity 
and the machine does not respond.  I have viewed the logs and can find 
no reason for the node to cease functioning.  Let me state that this 
behavior did not occur until after a processor upgrade, BIOS upgrade and 
OS upgrade.  I went in to the BIOS and made a few changes that seemed to 
prolong it even though its occurrence was mostly random.  If I leave the 
node idle, it will run for days.

Has anyone ever seen such behavior?

Tim
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