On 1/19/06, Plant, Dean <dean.plant@xxxxxxxxxx> wrote:
> Fong Vang wrote:
> > I have a total of 20 CentOS 4.1 systems running on fairly new
> > hardware. About 6 of them are experiencing strange hangs without any
> > indication -- nothing in /var/log/messages nor on the console --
> > sometime within 10-30 minutes after a reboot. The systems still
> > responds to ping but you can't ssh to it. At the console, you could
> > type "root" at the user prompt but it hangs immediately after hitting
> > enter.
> >
> > Memory scan of all systems show no error.
> >
> > Any idea how to troubleshoot this problem. The system's not
> > responsive to do any troubleshooting and nothing abnormal is in the
> > log.
> >
> > We running htis kernel: kernel-smp-2.6.9-11.EL.i686.rpm.
>
> Have you tried disabling hyperthreading? I had suffered this problem
> when we started buying Intel Xeon's, disabling HT'ing seemed to fix the
> problem for me.
Some people suggested that too. I'm asking for two of these systems
to be sent back from our remote data center. I'll try it then.
Did you just ended up running without hyperthreading? Did you ever
find a solution? It seems an awful waste if you can't use it.
> Dean
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